Scopely’s Security Team seeks a Security Engineer to improve the security stance of our infrastructure and production environments. Scopely Engineering leads the development and operation of multiple successful mobile games. We seek creative engineers with excellent technical judgment, strong interpersonal skills, and an eagerness to embrace new technologies.  Do you want to be part of our team, and make our internal and user-facing services safer and more robust? 

What You Will Do

• You guide teams making the right security decisions when building out new infrastructure, code, and corp environment 
• You build automation to keep our environment safe for our engineers to use.
• You have an advanced understanding of foundational cloud technologies like Docker, Kubernetes, MDM, Fuzzers, Code Scanners, and IAM
• You participate in the management of the Security posture across the organization, multi cloud and code environments. 
• You own and improve existing infrastructure, code and tooling for security.
• You leverage new technologies to elevate Scopely security.
• You collaborate with the engineering teams on the rollout of security measures.
• You help shape the security strategy of the company through innovation.

What We're Looking For

• You can demonstrate programming skills in one main programming language, as an example Go, Java or Python, this list is not exhaustive.
• You have 5+ years of experience in a global company with cloud-centric infrastructure.
• You have an in-depth understanding of Cloud, Corporate, and Software Security technologies.
• You have experience building out tooling, helping engineers and improving security.
• You have proven strong communication and team skills in a distributed environment.
• You have experience in driving organization wide changes in fast moving environments.

Please ensure that the résumé/CV you attach is written in English.

The opportunity:

Flexport is a platform for global trade in an industry that comprises 12% of the global GDP.  We are the first licensed freight forwarder and customs brokerage built around a modern tech stack.  We help the world's fastest-growing brands manage their international supply chains, providing a fully-managed service for moving products between any two places on the planet.

Exceptional software development is integral in allowing us to fulfill our mission of fixing the user experience in global trade. At Flexport you’ll develop products that are at the forefront of reshaping the entire logistics & supply chain industries. You’ll work alongside self-starters interested in solving real-world problems and streamlining the inefficiencies in the complex global trade industry. You’ll have the opportunity to reshape an industry by creating the new operating system for global trade.

Our engineers are top-notch software developers who love listening to the users, working as a team, and proactively taking the lead whenever necessary. The role involves learning the business of freight forwarding, modeling the work that people do to move freight, designing solutions to make it more efficient, and thinking innovatively to automate much of it. In this role, you will have an opportunity to own the design and development of key parts of our forwarding systems. You will have influence on subsystem design and help contribute to a team culture around practices that are critical to a quality product. 

About the team:

We have multiple teams in Shanghai and Shenzhen working on a suite of core products and services that enable Flexport operation to scale, including Forwarding Application, Client Application, Shipper Application, WMS, Consol Planning Tool, Document Platform (AI empowered), Email Platform, Compliance Platform, Work Assignment Engine, Exception Management, AI Copilot, Insight Builder (AI Data Analytics) and so on. 

In addition, we have a NAWS (Native AWS) team that develops infrastructure solutions for our products and services using the latest Infrastructure as Code (IaC) technology: CDKTF (Cloud Development Kit for Terraform). Our scope includes, but is not limited to, CI/CD, observability, DevX, data subsetting (TS3), IaC, template engines, and various open-source projects. Additionally, the team provides technical guidance to engineers across the organization.

We are looking for engineers who love learning, are passionate about collaborating, and desire to build solutions with a global impact.

You will:

• Build highly available, secure, distributed systems in a microservice architecture.
• Build cutting edge infrastructure solutions to help improve development experience across the company. And, work closely with other engineering teams to help them solve infrastructure related problems.
• Design, develop, test and maintain systems that represent the real-world intricacies of logistics entities, such as shipper, client, cargo, document, carrier, container, email etc.
• Collaborate with some of the best engineers in the industry to work on complex business and technical problems.
• Work closely with business partners and product managers to distill complex business problems into elegant technical solutions.
• Build and launch products rapidly and incrementally. We ship to production dozens of times per day.
• Ensure our products maintain a high-quality bar. We believe in anticipating issues by obsessing over metrics and applying key learnings from post-mortems to all our services.
• Geek out about shipping and logistics. (We do this often.)

You should have:

Basic Qualifications

• 3+ years of experience writing software, and a strong engineering background.
• 2+ years of design and architecture knowledge as well as familiarity with object-oriented analysis and design patterns (OOA/OOD)
• Knowledge of at least one programming language such as TypeScript, Ruby, C, C++, Java, or Kotlin
• Bachelor's degree in Computer Science or related technical field, or equivalent experience

Preferred Qualifications

• A love of simple, well-tested code that is easy to extend and hard to break.
• A bias for action. When you see a problem, you solve it.
• The ability to convey technical ideas in common terms to business partners, product managers, and engineers alike.
• Experience building large scale, high-performance systems in a complex, multi-tiered, distributed environment
• Understanding of performance tradeoffs, load balancing and operational issues
• Knowledge of professional software engineering practices & best practices for full software development life cycle, including coding standards, code reviews, source control management, continuous deployments, testing, and operations
• Experience with Infrastructure as Code (IaC) tools such as CDKTF, Terraform, AWS CloudFormation, or similar.
• Having basic concepts in AWS services, including IAM, EC2, ECS, S3, Lambda, Step Functions, EventBridge, and VPC, or equivalent services from other cloud providers.
• Familiarity with CI/CD pipelines, infrastructure automation, and monitoring/observability tools.
• Ability to troubleshoot and optimize distributed systems and cloud deployments.
• Non-optional: an aptitude for learning quickly.

Engineering Culture and Values:

• Check out our Key Values profile.

#LI-onsite

As a Software Developer Intern at Optiver, you’ll work alongside experienced engineers to develop innovative solutions that enable us to respond to the financial markets at lightning-fast speeds. In just a few weeks, you could develop applications that contribute towards our trading success.

By the end of the 8-week internship, you’ll have deepened your understanding of how technology is used in the quantitative trading industry. Plus, if you’ve excelled over the summer, you’ll receive an offer to return as a Graduate Software Developer.

WHAT YOU’LL DO:

Led by our in-house education team that consists of ex-traders and engineers, you’ll delve into advanced engineering concepts and lead innovative projects, during our world-class training program.

In just a few weeks, you'll have the opportunity to manage a project from end-to-end, learn how to work with a complex code base and make impactful contributions to production systems. You’ll get to work on real trading and IT problems, both technically and functionally, to improve our trading success.

You will also be able to build the compute platform and libraries for large scale machine learning model training and simulation workloads. You will have first-hand experience on applying the latest AI technology to quantitative trading problems.

Throughout the program, you will be paired with an experienced mentor, who will show you the ins-and-outs of our trading systems and provide you with guidance and feedback. Additionally, internal resources will be available for your continuous learning and development.

WHAT YOU’LL GET:

You’ll join a culture of collaboration and excellence, where you’ll be surrounded by curious thinkers and creative problem solvers. Driven by a passion for continuous improvement, you’ll thrive in a supportive, high-performing environment alongside talented colleagues, working collectively to tackle the most complex problems in the financial markets.

In addition, you’ll receive:

• A highly competitive remuneration package.

• Optiver-covered flights and accommodation for the duration of the internship.

• The opportunity to work alongside best-in-class professionals.

• Training, mentorship and personal development opportunities.

• Gym membership, plus weekly in-house chair massages.

• Daily breakfast, lunch and in-house barista.

• Regular social events.

WHO YOU ARE:

• Students who are graduating in 2027 or after 2026 September.

• Studying a Computer Science, Computer/Software/Electrical/Mechatronic Engineering or similarly technical degree.

• Knowledgeable about object orientated design and development concepts (experience with C++, C#, Python or Java is required for our technical assessment). 

• Understanding of the concepts underlying machine learning and deep learning technologies, and experience with modern deep learning frameworks such as TensorFlow, PyTorch etc

• Natural problem solvers who love nothing more than tackling a complex technical challenge.

• Team players who love working with like-minded peers and are always looking to learn and improve.

• Interested in the trading/quantitative finance industry (previous knowledge is not required).

HOW TO APPLY:

If you're ready to take the next step in your career and work on one of the most exciting trading floors in mainland China, we’d love to hear from you. Apply now via the form below. Applications close 16 March 2026.

In your application, please submit the following materials in English:

• Resume

• Cover letter (optional)

For any other inquiries, contact us at chinacareers@optiver.com.au

DIVERSITY STATEMENT

Optiver is committed to diversity and inclusion. We encourage applications from candidates of all backgrounds, and welcome requests for reasonable adjustments during the process.

We accept one application per role per year. If you have previously applied to this position during this season and have been unsuccessful, you can re-apply when the next recruitment season begins in 2027.

PRIVACY DISCLAIMER

Optiver 重视个人信息的保护。请您在提供个人信息给我们之前，认真阅读Optiver China Privacy Notice, 了解我们如何收集及处理您的个人信息。

Personal information protection is of utmost importance to Optiver. Before you provide any personal information to us, we strongly urge you to read our Privacy Policy to acknowledge how we collect and process your personal information.

NOTE: NO VISA SUPPORT

The Community You Will Join:

The Global Markets Tech team drives the evolution of our guest and host experience across international markets through product innovation that accelerates international growth. Expanding in under-penetrated markets is a core pillar of our company strategy. To achieve this, we innovate at every level - adapting our  product to the unique needs of every corner of the globe so that every user across our 220+ countries and regions feels right at home.

The team partners closely with Product, Design, Data Science, regional stakeholders, and core platform/vertical teams to translate local market needs into durable, scalable technology that can be piloted quickly and then rolled out broadly.

The Difference You Will Make:

A Senior Software Engineer in Global Markets is expected to deliver measurable international growth impact by building scalable product capabilities across key funnel surfaces (landing → search → pre‑booking) and by improving pricing, promotions, and discounts to increase conversion and customer value across markets.

A Typical Day

• Partner with PM/Design/Data Science to clarify goals, requirements, constraints, and success metrics, and translate them into a sequenced technical plan.
• Write or review technical designs, align tradeoffs, and coordinate dependencies with partner teams across regions.
• Build production code and services with a high quality bar: testing, documentation, instrumentation, and performance/reliability considerations.
• Run design and code reviews, advise engineers, and help drive consistent engineering standards across the team.
• Own delivery: track execution risks, provide stakeholder updates, coordinate launches (including localization/market rollout), and monitor post-launch results to iterate quickly.

Your Expertise

• Fluency in English is required. Japanese or Korean working proficiency is a plus .
• 6+ years of hands-on software engineering experience, with a strong track record shipping production systems.
• Solid understanding of large-scale backend architecture and distributed systems patterns (e.g., well-designed APIs, scalable data models, high-throughput services/pipelines, and performance-aware algorithms).
• Proven ability to drive ambiguous problems to resolution: break down open-ended requirements, propose pragmatic solutions, and execute independently while keeping stakeholders aligned.
• Strong programming skills in one or more of the following: Java, Kotlin, Python, Ruby/Ruby on Rails, JavaScript/TypeScript, with experience building and operating backend services.
• High engineering quality bar: you write clean, testable, maintainable code, and you design with reliability, observability, and operational readiness in mind.
• You actively raise the team’s technical bar through thoughtful code reviews, architecture discussions, and sharing best practices that improve overall team productivity.
• Data-informed decision making: you use metrics and experimentation to validate impact, diagnose issues, and iterate toward better outcomes—recognizing that small improvements in these flows can drive meaningful business results.
• Strong collaboration and communication skills: you work effectively across engineering teams and with Product, Design, and Data partners in a global environment.

工作职责概述Job Summary: 

高级Java开发不仅要设计和使用合适的技术方案高效率并且高质量地实现业务需要, 还要与其他职能员工进行良好的合作, 管理项目进度, 从技术方面带领其他team member对需求进行合理的设计设计, 以使整个team的资源利用, 效率, 以及质量达到最优。

A Senior Java Developer not only needs to design and use appropriate technical solutions to efficiently meet business needs, but also needs to collaborate effectively with other team members, manage project progress, and lead a small team from a technical perspective to optimize the team's resource utilization, efficiency, and quality.

预期工作目标/Job Expectations:

根据业务需求设计、开发和升级后端系统，特别是那些直接与移动应用程序交互的系统。

Design, develop, and upgrade backend systems based on business needs, especially those that interact directly with mobile apps.

优化已有系统，解决问题并提高其性能。

Optimize existing systems, resolve issues, and improve their performance.

编写单元测试和验证程序，执行自测，以保证发布质量。

Write unit tests and verification programs, and perform self-tests to ensure release quality.

编写方案设计文档和其他技术文档。

Prepare solution design documents and other technical documents.

与产品负责人、其他开发者、QA和其他人员协商，设计系统，并获取有关项目限制和能力、性能要求和接口的信息。

Confer with the product owner, other developers, QA, and other personnel to design the system and obtain information on project limitations and capabilities, performance requirements, and interfaces.

分析用户需求和软件需求，以确定在时间和成本限制内设计的可行性。

Analyze user needs and software requirements to determine feasibility of design within time and cost constraints.

带领小型开发团队，管理项目进度，并与团队内外成员协作，以高效、高质量地交付功能。

Lead a small dev team, manage project schedules, and collaborate with members both inside and outside the team to deliver high-efficiency, high-quality features.

参与团队和公司技术建设和创新，不断提高开发效率和质量。

Participate in the team and company's technological development and innovation, and continuously improve development efficiency and quality.

上述职责仅是此职位的一部分职责。公司可以在认为必要或适当时随时增加其他职责。

The duties and responsibilities described above may provide only a partial description of this position. This is not an exhaustive list of all aspects of the job.  Other duties and responsibilities not outlined in this document may be added as necessary or desirable, with or without notice.

知识、技能与能力/Knowledge, Skills and Abilities:

要求/Required:

具有 7 年以上 Java 开发经验。精通Java编程语言、开发环境和常用库。

7+ years of experience in Java development. Excellent knowledge of Java programming language, development environment, and libraries.

能熟练使用常用的数据结构和算法。

Proficient in using common data structures and algorithms.

精通 Spring 框架、缓存、数据库、RESTful 以及其他常用框架。

Excellent knowledge of Spring framework, cache, DB, RESTful, and other commonly used frameworks.

熟悉 Git、Kubernetes、Helm 以及其他开发和云工具。

Experience with Git, Kubernetes, Helm, and other development and cloud tools.

具备后端服务优化、重构和调试经验。

Experience with optimizing, refactoring, and debugging back-end services.

具有主导设计和开发较大规模高并发后端系统的经验。

Experience in leading the design and development of large-scale, high-concurrency backend systems.

英语读写和沟通能力优秀。

Excellent written and communication skills in English.

具备较强的沟通协作能力。

Strong communication skills and the ability to function effectively in a collaborative work environment.

具有高度的行动力和自我管理能力，以及较强的分析能力和求知欲。

Self-motivated and self-managed with a high degree of analytical ability and intellectual curiosity.

有前端、mobile app或电子商务项目经验者优先。

Experience with front-end, native app development, or e-commerce projects is a plus.

必备知识/Equipment Knowledge:

Java编程语言

Java programming language

数据结构和算法

Data structure and algorithms 

Spring框架

Spring framework

数据库, 缓存框架, 消息队列, 网络框架, 序列化框架等中间件和框架

Middleware and frameworks such as databases, caching frameworks, message queues, network frameworks, and serialization frameworks.

Git, Jira等开发工具

Development tools such as Git and Jira

云技术, 包括Kubernetes, Helm等

Cloud technologies, including Kubernetes, Helm, Docker, etc.

Mission

Speechify is the easiest way to listen to the world’s information. Articles on the web, documents in the cloud, books on your phone. We absorb it all and let you listen to it at your desk, on the go, at your own speed, and with tools that make learning easier, deeper, and faster.

What streaming services have done for audio entertainment, we’re doing for audio information. And whatever we’re doing seems to be working. We’re #1 in our category, and experiencing exponential growth.

Overview

We're looking for a Senior Software Engineer to join our Core Experiences Team. This team builds and maintains the foundational services and SDKs that power Speechify’s product experience across platforms. It's a critical role for someone who enjoys working at the intersection of product and infrastructure, thinks strategically, and is passionate about designing clear, reliable APIs and simple systems that directly enhance the user experience.

What You’ll Do

• Collaborate with Speechify’s Product Teams to scope projects, find ways to reduce scope to get faster feedback from customers, navigate the integration/UX tradeoffs relevant to different product teams, and deliver solutions via our cross-platform SDK
• Optimize existing functionality to ship things like faster loading and more intelligent parsing by designing more efficient abstractions and improving our algorithms
• Ship cloud functions, lightweight backend services, and jobs using Kotlin

An Ideal Candidate Should Have

• Systems thinking. You know that optimizing a system requires end-to-end design, and you believe simplicity is valuable.
• Speed. You work quickly to generate ideas and options and know how to decide which things can ship now and what things need time
• Focus. We’re a high-growth startup with a busy, remote team. You know how and when to engage or be heads down
• Collaboration. You know how to inspire, play, and negotiate with opinionated designers, marketers, and PMs
• Preferred Tech Stack:
  • Kotlin Multiplatform (Java experience is OK but role is Kotlin Multiplatform) 
  • Prior experience with GCP is a plus

What We Offer

• A fast-growing environment where you can help shape the company and product.
• An entrepreneurial-minded team that supports risk, intuition, and hustle.
• A hands-off management approach so you can focus and do your best work.
• An opportunity to make a big impact in a transformative industry.
• Competitive salaries, a friendly and laid-back atmosphere, and a commitment to building a great asynchronous culture.
• Opportunity to work on a life-changing product that millions of people use.
• Build products that directly impact and support people with learning differences like dyslexia, ADD, low vision, concussions, autism, and more.
• Work in one of the fastest growing sectors of tech, the intersection of artificial intelligence and audio.

Think you’re a good fit for this job? 

Tell us more about yourself and why you're interested in the role when you apply.
And don’t forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit? 

Refer them! 

Speechify is committed to a diverse and inclusive workplace. 

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.

Scopely's Security team is looking for an Anticheat Engineer to build a new client security function in China. You will design and ship client/server-side protections for large-scale mobile games, combat sophisticated cheating ecosystems, and help ensure fair play for tens of millions of players.

What You Will Do

• Build, and grow the Client Security team in China, setting China specific technical direction, and operational best practices.
• Design, implement, and maintain client-side detections against third‑party cheating tools, modified clients, hooking frameworks, and emulators on Android and iOS.
• Own the client security integration into Scopely's internal anti-cheat platforms working closely with teams to ensure detections are actionable and scalable.
• Define and evolve the obfuscation and hardening strategy for China mobile builds (e.g., binary protection, anti-debugging, anti-tamper, integrity checks), including evaluating and integrating third‑party hardening vendors where appropriate.
• Build and maintain strong coverage for the China mobile ecosystem, including:
• distribution through multiple Android app stores and OEM devices,
• diverse OS/ROM variants and rooted/jailbroken environments,
• and local PC/emulator-based cheating patterns.
• Contribute hands-on code (C++ plus Java/Kotlin and/or Objective‑C/Swift) in security‑sensitive paths, including detection logic, integrity checks, and secure client–server protocols.

What We’re Looking For

• Experience in mobile security, game anti-cheat, or client-side security engineering, including time working directly on Android or iOS native code.
• Direct experience with reverse engineering.
• Deep hands-on experience with:
• Android and IOS internals 
• hooking and instrumentation frameworks,
• and common mobile client security attack vectors.
• Strong proficiency in C/C++ and at least one mobile native language (Java/Kotlin for Android or Objective‑C/Swift for iOS), including experience shipping production code in large apps.
• Demonstrated experience designing and shipping client-side anti-cheat or integrity systems that integrate with server-side enforcement or analytics pipelines.
• Prior experience ing or technically directing a small engineering team 
• Experience working with large-scale telemetry or anti-abuse pipelines and using data to tune detections and reduce false positives.
• Professional proficiency in both Mandarin and English, written and spoken
• Requires five days per week in the office

Bonus Points

• BS / MS in Computer Science or Software Engineering or equivalent
• Experience shipping and securing mobile games or other large-scale consumer apps specific to the China market, specific exposure to:
• multiple Android app-store ecosystems and OEM variations,
• desktop/mobile emulator usage patterns,
• and tooling development experience specific for china mobile games 
• Previous CTF experience, and CVE contributing experience
• Prior work on client obfuscation / hardening pipelines, including vendor evaluation and integration, and handling performance and stability tradeoffs.
• Familiarity with large-scale cloud environments, streaming data processing, and monitoring/alerting

Ready to accelerate your growth in one of the most fascinating and dynamic industries? Our Research Summer Internship program will give you real insights into how data and research is used to improve global financial markets. Expand your knowledge of the financial markets and solve challenging problems that could impact the way we trade. Plus, if you’ve excelled over the summer and shown us your potential, you could receive an offer to join us as a graduate quantitative researcher.

With Optiver’s internship program, your work improving the market starts today.

Who we are:

Optiver is a global market maker founded in Amsterdam, with offices in London, Chicago, Austin, New York, Sydney, Shanghai, Hong Kong, Singapore, Taipei and Mumbai. Established in 1986, today we are a leading liquidity provider, with close to 2,000 employees in offices around the world, united in our commitment to improve the market through competitive pricing, execution and risk management. By providing liquidity on multiple exchanges across the world in various financial instruments we participate in the safeguarding of healthy and efficient markets. We provide liquidity to financial markets using our own capital, at our own risk, trading a wide range of products: listed derivatives, cash equities, ETFs, bonds and foreign currencies.

Since its establishment in 2012, our Shanghai office is a rapidly growing participant in the Chinese markets, trading exchange-listed futures, options and equities in China mainland. Our vision is to become the trusted partner in the development of Chinese financial markets. With the culture of a start-up but the backing of a 35+ year-old trading firm, the Optiver Shanghai office is truly unique. Everyone who joins us will help shape the future of our company and its global impact. Get ready: we are only just beginning. 

What you’ll do:

As a Quantitative Research Intern, you’ll work with our researchers and traders on real-life research projects, that directly impact the way we trade. Our quantitative researchers are responsible for the accuracy of our core pricing models. They work closely with our traders to analyse and improve all facets of our trading strategies.

As part of the internship, you’ll get to:

• Perform extensive analysis in order to implement new algorithms that support and improve our existing models.
• Develop risk management and portfolio optimisation tools to improve our execution algorithm.
• Work with petabytes of low latency, high-frequency market data sets.
• Collaborate with our developers to test and drive changes to our trading system, that will improve our ability to make successful trades.
• Keep up to date on the latest development of new models and technologies
• No previous experience in trading or financial markets? You bring the passion and we'll have the training to support you along the way 

Who you are:

• PhD student, who will graduate during 2028.
• Major in a highly quantitative field.
• Strong knowledge of probability and statistics, experience in machine learning and time-series analysis is a big plus.
• Programming experience in any language (C, C++, Python, JAVA, etc.), ideally with a preference towards Python.
• Ability to carry a project on your own in a structured way within a short timeframe.
• Experience in working with large datasets.
• Both a self-motivated contributor and a team player, with an entrepreneurial attitude and hunger for success.
• Interest in the trading/quantitative finance industry.

What you’ll get:

• The chance to work alongside diverse and intelligent peers in a rewarding environment.
• Competitive remuneration, including an attractive bonus structure and additional leave entitlements.
• Training, mentorship and personal development opportunities.
• Daily breakfast, lunch and snacks.
• Gym membership, sports and leisure activities, plus weekly in-house chair massages.
• Regular social events, clubs and Friday afternoon drinks.

Diversity statement:

Optiver is committed to diversity and inclusion, and it is hardwired through every stage of our hiring process. We encourage applications from candidates from any and all backgrounds, and we welcome requests for reasonable adjustments during the process to ensure that you can best demonstrate your abilities. 

Questions? Check out our internship and graduate FAQs or get in touch with the team at chinacareers@optiver.com.au.

How to apply:

If you’re interested in taking your career to the next level and work on one of the most exciting trading floors in China mainland, apply now via the form below. 

While we love how bilingual our teams are, be sure to submit the below application materials in English:

• Resume
• Academic transcripts, including Bachelors and Masters and PhD if any

For any other inquiries, please email chinacareers@optiver.com.au.

Privacy disclaimer:

Optiver 重视个人信息的保护。请您在提供个人信息给我们之前，认真阅读Optiver China Privacy Notice, 了解我们如何收集及处理您的个人信息。

Personal information protection is of utmost importance to Optiver. Before you provide any personal information to us, we strongly urge you to read our Privacy Policy to acknowledge how we collect and process your personal information.

WHAT YOU’LL DO

As a Senior Portfolio Manager or Quantitative Researcher on our Equity MFS (Medium Frequency Statistical arbitrage) team, you’ll jointly lead the effort to build Optiver Shanghai’s proprietary equity MFS strategy. In addition, you’ll:

• Be hands-on, and responsible for the end-to-end implementation of our current strategy, with some support
• Have experience specialising in Equity Statistical Arbitrage strategies that predict horizons from intraday to couple of days
• Have experience in computationally intensive research

WHO YOU ARE

To succeed in this role, you’ll need to have the below skills and experience.

• 3+ years of experience on a successful equities trading team, preferably a proprietary trading firm
• An educational background in Statistics, Mathematics, Engineering, Computer Science, or similar
• Strong analytical and mathematical skills
• Programming experience in languages such as Python, Java and C++ is a strong plus
• Quick learner, driven, team player, open minded and eager for success
• Collaborative attitude and continuous improvement mindset

WHAT YOU’LL GET

• The chance to work alongside diverse and intelligent peers in a rewarding environment
• Competitive remuneration including an attractive bonus structure and additional leave entitlements
• Training, mentorship and personal development opportunities
• Daily breakfast, lunch and snacks
• Gym membership, sports and leisure activities, plus weekly in-house chair massages
• Regular social events, clubs and Friday afternoon drinks.

DIVERSITY STATEMENT

Optiver is committed to diversity and inclusion, and it is hardwired through every stage of our hiring process. We encourage applications from candidates from any and all backgrounds, and we welcome requests for reasonable adjustments during the process to ensure that you can best demonstrate your abilities.

Questions? Get in touch with the recruitment team at careers@optiver.com.au.

PRIVACY DISCLAIMER

Optiver 重视个人信息的保护。请您在提供个人信息给我们之前，认真阅读Optiver China Privacy Notice, 了解我们如何收集及处理您的个人信息。

Personal information protection is of utmost importance to Optiver. Before you provide any personal information to us, we strongly urge you to read Optiver China Privacy Notice for acknowledging how we collect and process your personal information.

WHAT YOU'LL DO

As a Senior Portfolio Manager / Quantitative Researcher on our Shanghai team, you'll lead the development of systematic intraday strategies that capture opportunities from minute to hour horizons across a range of asset classes. You'll own the full research-to-production lifecycle and have direct impact on live trading performance. You can expect to:

• Lead alpha research: generate ideas, discover signals, and decide what's worth pursuing at intraday horizons
• Build and validate models: design predictive models tailored to intraday dynamics and ensure robustness through rigorous backtesting
• Construct portfolios: combine signals, manage intraday risk exposures, and optimise for costs, turnover and capacity
• Drive production & execution: own performance end-to-end and ensure strategies are tradable and aligned with real market microstructure

WHO YOU ARE

We expect someone who is a driven, passionate and collaborative researcher with a strong track record in systematic intraday trading. To succeed in this role, you'll need:

• 3+ years of experience in quantitative research or trading, preferably at a proprietary trading firm, with solid production results in live intraday strategies
• A strong research mindset, and a proven ability to generate original ideas and take them from concept to production
• Programming experience in languages such as Python, Java or C++, and experience working with large-scale datasets and data pipelines
• A quick-learning, team-oriented and open-minded attitude, with a continuous improvement mindset and drive to succeed

WHAT YOU'LL GET

• The chance to work alongside diverse and intelligent peers in a rewarding environment
• Competitive remuneration including an attractive bonus structure and additional leave entitlements
• Training, mentorship and personal development opportunities
• Daily office breakfast, lunch, snacks etc.
• Sponsored gym membership, sports and leisure activities, plus weekly in-house chair massages
• Regular social events, clubs and Friday afternoon drinks

DIVERSITY STATEMENT

Optiver is committed to diversity and inclusion, and it is hardwired through every stage of our hiring process. We encourage applications from candidates from any and all backgrounds, and we welcome requests for reasonable adjustments during the process to ensure that you can best demonstrate your abilities.

Questions? Get in touch with the recruitment team at careers@optiver.com.au.

PRIVACY DISCLAIMER

Optiver 重视个人信息的保护。请您在提供个人信息给我们之前，认真阅读Optiver China Privacy Notice, 了解我们如何收集及处理您的个人信息。

Personal information protection is of utmost importance to Optiver. Before you provide any personal information to us, we strongly urge you to read Optiver China Privacy Notice for acknowledging how we collect and process your personal information.

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun.

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world. 

Read our blog to learn more.

About the role...

We’re looking for a Software Engineer I to join our China team. In this role, you’ll build and ship features that drive user growth and deliver high-quality learning experiences to millions of learners in China. You’ll work closely with product managers, designers to create engaging, localized experiences tailored to this market.

This is an opportunity to contribute to a fast-moving, high-impact team focused on one of Duolingo’s most important growth regions. You’ll gain experience working across the stack (backend and client), running experiments, and collaborating cross-functionally to improve key metrics like daily active users (DAU).

🧠  You will...

• Collaborate with product managers and designers to drive user growth in China.
• Work with Government Relations (GR) and cross-functional partners to ensure product compliance in China
• Lead individual project priorities, deadlines, and deliverables
• Contribute to code reviews and collaborate across teams to ensure quality and scalability

✅  You have...

• Graduated or will graduate with a B.S. or M.S. degree in Computer Science or related technical field (i.e. math, physics, or data science) before summer 2026
• 0–1 years of experience programming in one or more of: Java, Python, Kotlin, or Swift
• Dedication to our mission of universally available education
• Relocation to Beijing, China. This position is based in Beijing.

⭐  Exceptional candidates will have...

• A GPA of 3.6+
• A Duolingo streak
• Proficient in both spoken and written English.

Scopely is looking for a Server Engineer, Tooling to join an unannounced title based in our Shanghai office (5 days in the office).

At Scopely, we care deeply about what we do and want to inspire play, every day — whether in our work environments alongside our talented colleagues, or through our deep connections with our communities of players. We are a global team of game lovers who are developing, publishing, and innovating within the mobile games industry, connecting millions of people around the world daily.

We are in the early stages of development on an ambitious mobile game in China, and we’re assembling a team of passionate game makers to craft unforgettable characters and immersive adventures that players will love.

What You Will Do

We are seeking a Server Engineer, Tooling to design, build, and optimize the core tools and infrastructure that power our backend game development and deployment workflows.

What We’re Looking For

• Experience: professional experience in software engineering, tooling, DevOps, or infrastructure engineering, with deep expertise in optimizing developer workflows and CI/CD systems at scale.
• Tooling Expertise: Advanced hands-on experience designing and optimizing build systems like Bazel and Gradle. Experience with dependency injection frameworks.
• CI/CD Expertise: Strong background in designing and maintaining CI pipelines (e.g., GitLab CI) and runner infrastructure.
• Infrastructure Skills: Strong background with cloud platforms (Alibaba Cloud, AWS, Azure, or GCP) and container orchestration (Kubernetes). Experience with Terraform or other infrastructure-as-code tools.
• Programming & Scripting: Proficiency in Go, Python, Java, Bash, or similar languages for automation, tooling, and CI workflow orchestration.
• Systems Knowledge: Strong understanding of Linux systems, networking fundamentals, security best practices, and tooling for large-scale, distributed engineering teams.
• Communication: Professional proficiency in Mandarin, bonus for English
• Education: BS / MS in Computer Science or Software Engineering or equivalent

Bonus Points

• Experience building production-grade services using Java, with strong knowledge of performance tuning, and modern development best practices
• Experience supporting large server monorepos and optimizing server development workflows for online games or high-scale applications.
• Familiarity with common testing frameworks and strategies for automated server-side testing (smoke tests, integration tests, end-to-end tests).
• Experience using AI tools to speed up the development lifecycle and improve efficiency

Scopely is looking for a Senior/Staff Server Engineer to join an unannounced title based in our Shanghai office (5 days in the office).

At Scopely, we care deeply about what we do and want to inspire play, every day - whether in our work environments alongside our talented colleagues, or through our deep connections with our communities of players. We are a global team of game lovers who are developing, publishing and innovating the mobile games industry, connecting millions of people around the world daily. 

We are in the early stages of development on an ambitious mobile game in China, and we’re assembling a team of passionate game makers to craft unforgettable characters and immersive adventures that players will love.

What You Will Do 

We are looking for a Server Engineer to build the next generation of our games. You will work with a team of passionate engineers while developing core systems and features that power large-scale, real-time experiences for our game. You’ll work on complex technical challenges involving real-time interaction, large-scale systems, and a persistent shared world used by tens of millions of players.

What We’re Looking For 

• Experience in building, and maintaining scalable, production-grade distributed systems. Deep understanding of networked and distributed systems, cloud security best practices, and performance optimization. Familiarity with network protocols for real-time communication, such as gRPC and WebSocket.
• Programming Languages: Proficiency in one or more of Java, Go, C#, Python
• Familiar with Git, Bash and Gradle
• Professional proficiency in both Mandarin and English
• BS / MS in Computer Science or Software Engineering or equivalent

Bonus Points 

• You have experience shipping at least one online game or app
• Experience in managing IaaS environments and deploying on cloud platforms such as Alibaba Cloud (Alicloud), AWS, Azure, or GCP. Proficiency with Kubernetes cluster management, infrastructure as code tools like Terraform
• Experience using data processing frameworks and data warehouse
• Experience using AI tools to speed up the development lifecycle and improve efficiency
• Experience leading a team: task breakdown& scoping, code reviews, mentoring junior devs, prototyping, etc. 
• Excellent verbal English communication

At Scopely, we create games for everyone - and want to ensure that the people behind our games reflect that! We are committed to creating a diverse, supportive work environment where everyone is treated with respect. We are committed to providing equal employment opportunities and welcome individuals from all backgrounds to join us & embrace the adventure!

Scopely is looking for a Client Engineer to join an unannounced title based in our Shanghai office (5 days in the office).

At Scopely, we care deeply about what we do and want to inspire play, every day - whether in our work environments alongside our talented colleagues, or through our deep connections with our communities of players. We are a global team of game lovers who are developing, publishing and innovating the mobile games industry, connecting millions of people around the world daily. 

We are in the early stages of development on an ambitious mobile game in China, and we’re assembling a team of passionate game makers to craft unforgettable characters and immersive adventures that players will love.

What You Will Do

We are looking for a Client Engineer to help build the next generation of our games. You will work with a team of passionate engineers while developing core systems and features that power large-scale, real-time experiences for our unannounced game title. You’ll work on complex technical challenges involving real-time interaction, large-scale systems, and a persistent shared world used by tens of millions of players.

• Develop, and maintain key client-side components that enable rich, scalable game experiences.
• Partner closely with server, product, design, and other cross-functional teams to ensure technical alignment and product quality.
• Apply engineering best practices, including code reviews, unit testing, load testing, and performance optimization.
• Troubleshoot complex issues across mobile platforms to ensure stability and uptime for live systems.
• Participate in regular in-person meetings and collaboration sessions (role requires 5 days/week in office).

What We're Looking For

• Experience developing commercial games in Unity, C#
• Experience with at least one of the following: 
• Mobile native coding (Java/Kotlin for Android, ObjC/Swift for iOS, C/C++ for native)
• Network programming, cloud computing and server debugging
• Graphics programming for 3D games
• Familiar with Git, Bash and Gradle
• Strong problem solving and communication skills
• Professional proficiency in both Mandarin and English
• BS / MS in Computer Science or Software Engineering or equivalent

Bonus Points 

• Experience with profiling and optimization for mobile
• Experience with developing productivity tools and creating efficient procedures
• Rich experience in playing mobile games and console games
• Experience leading a team: task breakdown&scoping, code reviews, mentoring junior devs, prototyping, etc.
• Excellent verbal English communication

At Scopely, we create games for everyone - and want to ensure that the people behind our games reflect that!   We are committed to creating a diverse, supportive work environment where everyone is treated with respect. We are committed to providing equal employment opportunities and welcome individuals from all backgrounds to join us & embrace the adventure!

Role summary 

Location: Guang Zhou 

On-site  | Full-time 

As a full stack development engineer with more that 5 years of experience. You will serve as a core technical member of the development team, participating in the design, development, deployment, and full lifecycle maintenance of the company's cross-border payment system. You need to have a high pursuit of code quality, system stability, and security to ensure that you can provide secure, stable, and efficient services to users worldwide. 

What you’ll do 

• System design and development: Participate in the core architecture design and technical solution development of cross-border payment platforms, responsible for the development and iteration of core modules such as transactions, clearing and settlement, risk control, and account systems, and write high-quality and maintainable code. 

• Performance optimization and stability assurance: Monitor and optimize system performance, handle online failures, and ensure high availability of the system in high concurrency, multi time zone environments (target 7x24 hour stable operation). Build a full chain stress testing, monitoring, and log analysis system to quickly locate and resolve performance bottlenecks and anomalies. 

• Security and Compliance: Build a payment system that complies with international security standards and Chinese regulatory requirement, design and implement a fund security protection system, including transaction monitoring, API communication encryption, anti-attack strategies, etc., to ensure the security of user data and funds. 

• Deployment and Operations Collaboration: Proficient in using containerization technologies such as Docker and Kubernetes, collaborating with operations teams to achieve automated deployment, publishing, and governance of services.  

• Teamwork and documentation: Work closely with product, front-end, testing, and operation teams to complete requirement reviews and implement technical solutions. Write clear technical design documents, API documents, and system architecture documents. 

Who you are 

• 5+ years working experience in a high-tech or fin-tech company or has experience in core modules of cross-border payments or third-part payments. 

• Java Core: Proficient in Java language and JVM principles, with a deep understanding of multithreading, concurrent programming, collection frameworks, and performance tuning. 

• Mainstream frameworks: Proficient in Spring Boot, Spring Cloud and other mainstream open source frameworks, and understand their core principles. 

• Database and Middleware: Proficient in MySQL and SQL optimization, familiar with at least one NoSQL database (such as Redis) and its application scenarios. Proficient in using commonly used message middleware such as RocketMQ/Kafka. 

• Solid understanding of HTML5, CSS3, and JavaScript (ES6+). Familiarity with TypeScript is a plus. 

• Hands-on experience with React and modern state management. Familiarity with Next.js and Ant Design is preferred. 

• Basic knowledge of modern frontend build workflows (e libraries, bundlers) and version control (Git). 

• Distributed technology: Familiar with the concept of distributed systems, microservice architecture design and governance, familiar with common solutions such as distributed transactions, caching, locks, etc. 

• Excellent logical thinking, problem analysis and positioning skills, and technical problem-solving abilities. 

• Good teamwork spirit and cross-cultural communication skills, able to adapt to multi time zone collaboration. 

• Strong sense of responsibility and risk awareness, highly sensitive to financial security vulnerabilities. 

As a plus 

• Daily user of AI coding tools such as Cursor, GitHub Copilot, Claude Code etc; able to configure and govern usage effectively. 

• Proven ability to translate product requirements into high‑quality prompts and validate AI‑generated code with tests and static analysis. 

• Understands limitations, privacy, licensing, and security considerations for AI‑assisted code; adheres to org policy and data‑handling rules. 

• Experience building lightweight internal “AI agents” or scripts to automate repetitive engineering tasks (e.g., refactors, doc updates, test generation). 

At Visual Concepts, we believe great games are made by diverse and empowered teams with a shared passion for play. As one of the world’s top game development studios, we have shipped over 100 multi-sku titles to critical acclaim and commercial success. Our teams are independent and ambitious. Our studios in Novato, Irvine, Budapest, Shanghai, Austin, Boise, Seoul and Parksville, Canada are committed to artistry and ground breaking technology, offering top candidates the opportunity to learn and grow with some of the hardest working and most creative minds in the industry.

Visual Concepts China (Shanghai) is seeking a Senior Full-Stack Server Engineer to join our studio for an unannounced project. Widely regarded as one of the world’s top video game studios, Visual Concepts, a subsidiary of Take-Two Interactive Software, Inc. (TTWO). Visual Concepts is best known for some of the world’s greatest sports videogames, including the world’s #1-rated and #1-selling basketball franchise, NBA 2K.

What We Need:

We are looking for a  backend specialist, responsible for designing, developing, and maintaining robust, scalable, and secure server-side applications and APIs. This role requires solid, hands-on experience in server API setup and configuration, along with a strong solid understanding of database storage solutions.

Who Will Be A Great Fit:

• Experience: 8-10 years of professional experience in software development, with at least 5 years focused on high-scale backend server engineering
• Server API Mastery: Demonstrable expertise in designing, building, documenting, and consuming complex server APIs (REST/GraphQL). Must have experience with API gateways and service-to-service communication
• Proficiency in major backend languages (e.g., Python, Java, C++)
• Database Proficiency: Strong solid understanding of relational databases (e.g., PostgreSQL, MySQL, MS SQL Server) including query optimization, indexing, and schema design. Good understanding on in-memory database solutions as well as NoSQL databases for scaling across machine clusters
• Cloud Computing: Hands-on experience deploying and managing applications on at least one major cloud platform (AWS, Azure, or GCP)
• Expert knowledge of various testing methodologies and requirements (unit, integration, BVT, stress and performance testing). Able to setup testable framework for automation and white-box testing
• Bachelor or higher degree (or its equivalent) in Computer science, Computer engineering or a directly related field
• Love for video games (not just ours!)

Might Be Nice:

• Experience deploying large-scale microservices and distributed systems
• Good understanding of networking, data storage and security
• Experience with Infrastructure as Code (IaC) tools like Terraform, AWS CloudFormation, Google Cloud Deployment Manager or Azure Resource Manager
• Understanding of a heavily regulated or high-traffic environment (e.g., FinTech, e-commerce, telecommunications)
• Prior experience in leading technical projects and mentoring junior engineers

please email: hrcn@vcentertainment.com

To learn more about Visual Concepts and our studio locations, check out our website at www.vcentertainment.com

At Visual Concepts, we believe great games are made by diverse and empowered teams with a shared passion for play. As one of the world’s top game development studios, we have shipped over 100 multi-sku titles to critical acclaim and commercial success. Our teams are independent and ambitious. Our studios in Novato, Irvine, Budapest, Shanghai, Austin, Boise, Seoul and Parksville, Canada are committed to artistry and ground breaking technology, offering top candidates the opportunity to learn and grow with some of the hardest working and most creative minds in the industry.

Visual Concepts China (Shanghai) is seeking a Senior Full-Stack Server Engineer to join our studio for an unannounced project. Widely regarded as one of the world’s top video game studios, Visual Concepts, a subsidiary of Take-Two Interactive Software, Inc. (TTWO). Visual Concepts is best known for some of the world’s greatest sports videogames, including the world’s #1-rated and #1-selling basketball franchise, NBA 2K.

What We Need:

We are looking for a  backend specialist, responsible for designing, developing, and maintaining robust, scalable, and secure server-side applications and APIs. This role requires solid, hands-on experience in server API setup and configuration, along with a strong solid understanding of database storage solutions.

Who Will Be A Great Fit:

• Experience: 8-10 years of professional experience in software development, with at least 5 years focused on high-scale backend server engineering
• Server API Mastery: Demonstrable expertise in designing, building, documenting, and consuming complex server APIs (REST/GraphQL). Must have experience with API gateways and service-to-service communication
• Proficiency in major backend languages (e.g., Python, Java, C++)
• Database Proficiency: Strong solid understanding of relational databases (e.g., PostgreSQL, MySQL, MS SQL Server) including query optimization, indexing, and schema design. Good understanding on in-memory database solutions as well as NoSQL databases for scaling across machine clusters
• Cloud Computing: Hands-on experience deploying and managing applications on at least one major cloud platform (AWS, Azure, or GCP)
• Expert knowledge of various testing methodologies and requirements (unit, integration, BVT, stress and performance testing). Able to setup testable framework for automation and white-box testing
• Bachelor or higher degree (or its equivalent) in Computer science, Computer engineering or a directly related field
• Love for video games (not just ours!)

Might Be Nice:

• Experience deploying large-scale microservices and distributed systems
• Good understanding of networking, data storage and security
• Experience with Infrastructure as Code (IaC) tools like Terraform, AWS CloudFormation, Google Cloud Deployment Manager or Azure Resource Manager
• Understanding of a heavily regulated or high-traffic environment (e.g., FinTech, e-commerce, telecommunications)
• Prior experience in leading technical projects and mentoring junior engineers

please email: hrcn@vcentertainment.com

To learn more about Visual Concepts and our studio locations, check out our website at www.vcentertainment.com

Summary: We are seeking an AI Engineer to join an innovative team in Shenzhen. This role involves developing cutting-edge AI solutions to support our next-generation Layer 1 blockchain project, focusing on institutional adoption and the tokenization of real-world assets. The AI Engineer will play a critical role in designing and implementing AI models that bridge traditional Web2 institutions into Web3.

Responsibilities:

• Design and develop AI algorithms and models to support blockchain infrastructure.
• Collaborate with cross-functional teams to integrate AI solutions into blockchain applications.
• Analyze and interpret complex data sets to enhance decision-making processes.
• Implement machine learning models to improve blockchain scalability and efficiency.
• Ensure AI solutions comply with regulatory and security standards.
• Stay updated with the latest AI and blockchain technologies.

Required skills:

• Bachelor's or Master’s degree in Computer Science, AI, Machine Learning, or a related field.
• Proven experience in AI and machine learning model development.
• Strong programming skills in languages such as Python, R, or Java.
• Familiarity with blockchain technology and decentralized applications.
• Ability to work collaboratively in a fast-paced, dynamic environment.
• Excellent problem-solving and analytical skills.
• Proficiency in English and Mandarin is required.

Mission

Speechify is the easiest way to listen to the world’s information. Articles on the web, documents in the cloud, books on your phone. We absorb it all and let you listen to it at your desk, on the go, at your own speed, and with tools that make learning easier, deeper, and faster.

What streaming services have done for audio entertainment, we’re doing for audio information. And whatever we’re doing seems to be working. We’re #1 in our category, and experiencing exponential growth.

Overview

We're looking for a Senior Software Engineer to join our Core Experiences Team. This team builds and maintains the foundational services and SDKs that power Speechify’s product experience across platforms. It's a critical role for someone who enjoys working at the intersection of product and infrastructure, thinks strategically, and is passionate about designing clear, reliable APIs and simple systems that directly enhance the user experience.

What You’ll Do

• Collaborate with Speechify’s Product Teams to scope projects, find ways to reduce scope to get faster feedback from customers, navigate the integration/UX tradeoffs relevant to different product teams, and deliver solutions via our cross-platform SDK
• Optimize existing functionality to ship things like faster loading and more intelligent parsing by designing more efficient abstractions and improving our algorithms
• Ship cloud functions, lightweight backend services, and jobs using Kotlin

An Ideal Candidate Should Have

• Systems thinking. You know that optimizing a system requires end-to-end design, and you believe simplicity is valuable.
• Speed. You work quickly to generate ideas and options and know how to decide which things can ship now and what things need time
• Focus. We’re a high-growth startup with a busy, remote team. You know how and when to engage or be heads down
• Collaboration. You know how to inspire, play, and negotiate with opinionated designers, marketers, and PMs
• Preferred Tech Stack:
  • Kotlin Multiplatform (Java experience is OK but role is Kotlin Multiplatform) 
  • Prior experience with GCP is a plus

What We Offer

• A fast-growing environment where you can help shape the company and product.
• An entrepreneurial-minded team that supports risk, intuition, and hustle.
• A hands-off management approach so you can focus and do your best work.
• An opportunity to make a big impact in a transformative industry.
• Competitive salaries, a friendly and laid-back atmosphere, and a commitment to building a great asynchronous culture.
• Opportunity to work on a life-changing product that millions of people use.
• Build products that directly impact and support people with learning differences like dyslexia, ADD, low vision, concussions, autism, and more.
• Work in one of the fastest growing sectors of tech, the intersection of artificial intelligence and audio.

Think you’re a good fit for this job? 

Tell us more about yourself and why you're interested in the role when you apply.
And don’t forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit? 

Refer them! 

Speechify is committed to a diverse and inclusive workplace. 

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.

NO VISA SUPPORT

The Community You Will Join:

The Engineering team is responsible for developing the Airbnb app and building products. We are a remote team based in different cities in China, and we meet up in person regularly to collaborate, connect and celebrate. 

The Difference You Will Make:

As a Software Engineer in the Global markets Foundation team, you will work closely with PMs, designers, data scientists and engineers across global teams to build the foundation for Airbnb. You will be responsible for improving the foundation of the product from engineering efficiency, consistency and quality. You will work on projects that can span multiple areas, foundation, traffic and data.

This is a small team that provides its ICs with the opportunity to either go broad and influence all foundation wise development at Airbnb, or to go deep and improve the ways of working on a single platform.

A Typical Day: 

• Build services and APIs to drive existing and new features for web and mobile apps
• Work with data scientists and business analysts to define, capture, and use real-time event data for business insights and product features
• Collaborate with infrastructure engineering teams to participate in, validate, and evolve how we build, test, and deploy code in a distributed Service-Oriented Architecture
• Alter existing and develop new data access and protection patterns to ensure our community’s personal data is safe and secure, at scale
• Maintain the cloud infrastructure, specifically for Airbnb guests based in China
• Opportunity to work with nearly every team in the company to surface their product functionality in our customer support tools

Your Expertise:

• 2-4 years of industry experience as Backend or Full-Stack Engineer with a BS/Masters or no years of experience with a PhD.
• Experience in building tools for internal use
• Work experience, open-source code, or coursework in any of the following languages: C/C++, Java, C#, Python/Django, Ruby/Ruby on Rails, Javascript / TypeScript.
• Exposure to architectural patterns of a large, high-scale web application (e.g., well-designed APIs, high volume data pipelines, efficient algorithms).
• Experience with web development best practices such as A/B testing, continuous integration.
• Understanding of data structures and problem solving approaches, and ability to articulate trade offs.
• Passion for creating a highly effective technology platform for our growing global workforce.
• Be future looking, we might be focused on immediate regulations, but need to build for the long term.
• Comfortable with tackling ambiguous problems and unblocking yourself.
• Focus on building high quality products, every one of our flows affects the business bottom line.
• Data driven in how you solve problems and validate you've solved them correctly.
• Possesses strong verbal and written communication skills.
• [Bonus] Frontend development experience is a big bonus.

Your Location

This position is China - Remote Eligible. The role may include occasional work at an Airbnb office or attendance at offsites, as agreed to with your manager. Your recruiter will inform you what cities you are able to work from depending on your personal legal working identity and Airbnb internal policies.

About the Team

At GOAT Group, the Engineering team is an integral part of our dynamic company. By joining the team, your skills will be front and center, working alongside other passionate individuals to solve problems and build software. From launching compelling new consumer experiences, tackling global logistics challenges to scaling infrastructure to facilitate our rapid growth – technology is essential to driving our vision forward. The work you do will change the way the world shops, while also empowering entrepreneurs, including individual sellers, brands and boutiques.

Role Overview

We are looking for a Backend Engineer to help design and implement new features across multiple backend applications. As a presence and an individual contributor on a small team, you will play a key role in both enhancing a Ruby on Rails backend at the heart of the business and building out a new, more scalable service-driven architecture.

Language requirement: Fluent in Mandarin and English

Location: Shanghai, China

• Manage projects and problems of significantly larger scopes
• Formulate an efficient game plan for delivering a stable, well-tested feature on time
• Make technical recommendations that improve the codebase while minimizing risk
• Identify and fix (or ideally avoid) bugs and performance bottlenecks
• Coordinate and communicate seamlessly across other technical and product teams
• Be a helpful and supportive presence on the team, contributing to code reviews and other team processes

• Bachelor’s degree preferred
• 7+ years of experience in software engineering with Ruby on Rails (Python, Go, PHP, or Java are also acceptable)
• Experience with e-commerce/web applications
• Familiarity and comfortability with the technologies, the tradeoffs, and the design patterns emerging in web services
• A quick learner, a self-starter, ability to work autonomously, and be willing (and able) to handle the pressures of an increasing level of responsibility

About the Team

At GOAT Group, the Engineering team is an integral part of our dynamic company. By joining the team, your skills will be front and center, working alongside other passionate individuals to solve problems and build software. From launching compelling new consumer experiences, tackling global logistics challenges to scaling infrastructure to facilitate our rapid growth – technology is essential to driving our vision forward. The work you do will change the way the world shops, while also empowering entrepreneurs, including individual sellers, brands and boutiques.

Role Overview

We are looking for a Backend Engineer to help design and implement new features across multiple backend applications. As a presence and an individual contributor on a small team, you will play a key role in both enhancing a Ruby on Rails backend at the heart of the business and building out a new, more scalable service-driven architecture.

Language requirement: Fluent in Mandarin and English

Location: Shanghai, China

Responsibilities:

• Participate in the development of backend systems for the company’s centralized exchange (CEX), providing technical support for core business operations.
• Design architectures for complex future payment-related systems; demonstrate strong capabilities in designing large-scale distributed systems while ensuring high-quality architecture that balances development, operational, maintenance, and reliability costs.
• Contribute to solution design and technical reviews for key engineering projects; conduct quality assessments, identify issues during system iteration, and help enhance team efficiency and development quality.
• Lead research and resolution of critical technical challenges, ensuring stability of the core systems.
• Participate in core architecture implementation, write high-quality code, train and guide developers, and help standardize engineering processes.
• Lead the design, development, and innovation of real-time computing systems.
• Drive the architectural evolution of the trading matching engine (handling tens of millions to hundreds of millions of daily requests).
• Lead the development of rule engines, variable platforms, and other mid-platform (middleware) systems.

Requirements:

• Bachelor’s degree in Computer Science or related field; expert-level proficiency in Java and its ecosystem, with 8+ years of hands-on development experience.
• Experience in developing and optimizing large-scale data aggregation, query, and computation systems.
• Experience with large-scale system refactoring; hands-on exposure to DDD, middleware platforms, and CI/CD is a strong plus.
• Deep understanding of Java-related frameworks such as Spring Cloud Alibaba, MyBatis—their design principles and internal mechanisms; strong knowledge of transactions and distributed transactions.
• Proficient in Redis and at least one MQ technology such as RabbitMQ or RocketMQ; familiarity with middleware such as SkyWalking, CAT, and scheduling/orchestration systems.
• Experience building or promoting core frameworks in large-scale companies is preferred.
• Familiar with common networking issues and capable of effective troubleshooting.
• CEX experience is mandatory.

The Community You Will Join:

The Client Products & Emerging Technology (CP&ET) team is a global, cross-functional group dedicated to building foundational frameworks and innovative, app-wide features that shape the end-to-end experience for Airbnb’s guests and hosts. You’ll join a collaborative environment that thrives on experimentation, partnership, and continuous learning—working closely with Product, Design, Engineering, and Data partners to deliver impactful solutions across multiple platforms. 

The Difference You Will Make:

As a member of a diverse and distributed team across the US and China, you’ll be expected to leverage your expertise in both Frontend and Backend development (Frontend-Heavy) to play a key role in building foundational frameworks, exploring emerging technologies, driving best practices, and enabling rapid feature rollouts that integrate seamlessly throughout the Airbnb ecosystem.

A Typical Day: 

• Collaborate closely with engineers across platforms—including frontend, backend, native (iOS/Android), and infrastructure—to build cohesive solutions.
• Work in partnership with cross-functional teams, including Design, Product, and Data Science, to define and deliver impactful outcomes.
• Propose and implement robust architectural patterns for high-scale web applications and backend services, focusing on well-designed APIs, efficient data pipelines, and performant algorithms.
• Develop scalable, high-quality foundational frameworks as well as innovative product features used by millions of guests and hosts.
• Evaluate technical solutions, contribute to product and framework design discussions, and help shape new features from concept to launch.
• Drive alignment, manage technical projects, and work effectively with diverse stakeholders.
• Write unit and integration tests, participate in code reviews, and uphold high engineering standards across the team.

Your Expertise:

• 5+ years of professional software development experience, with a focus on building both frontend and backend systems 
• Advanced proficiency in modern frontend technologies—including HTML, CSS, JavaScript/TypeScript, frameworks like React or Angular, and frontend architecture (build tools, reusable components).
• Deep expertise in one or more backend/server languages (e.g., Java, Kotlin, C++, etc.) and proven experience designing and scaling high-quality, high-traffic backend services
• Passion for building and evolving foundational frameworks that solve key engineering needs and support the wider team.
• Proven track record of delivering impactful products end-to-end, with a dedication to creating interactive, high-quality, and delightful user experiences.
• Self-driven and excited to tackle large, open-ended projects and drive meaningful business impact in a collaborative environment.
• Solid foundation in unit, integration, and end-to-end testing practices.
• Fluent in both Chinese and English

Your Location

This position is remote work within China Mainland. The role may include occasional work at an Airbnb office or attendance at offsites, as agreed to with your manager. Your recruiter will inform you what cities you are able to work from depending on your personal legal working identity and Airbnb internal policies.

Our Commitment to Inclusion & Belonging:
Airbnb is committed to working with the broadest talent pool possible. We believe diverse ideas foster innovation and engagement, and allow us to attract creatively-led people, and to develop the best products, services and solutions. All qualified individuals are encouraged to apply.

Company Overview

At Zuora, we do Modern Business. We’re helping people subscribe to new ways of doing business that are better for people, companies and ultimately the planet. It’s an approach resulting from the shift to the Subscription Economy that puts customers first by building recurring relationships instead of one-time product sales and focuses on sustainable growth. 

Through our leading expertise and multi-product suite - including Zuora Billing and Zuora Revenue — we provide a unified monetization and revenue automation platform that connects quoting, billing, payments, and revenue recognition end to end. Our solutions give finance and revenue teams a single source of truth for subscription economics, streamline ASC 606-compliant revenue recognition, and enable real-time insights into growth, profitability, and customer lifetime value.

We are transforming all industries and working with the world’s most innovative companies to monetize new business models, nurture subscriber relationships and optimize their digital experiences.

The Team & Role

The Beijing Billing Core team is a specialized engineering powerhouse and the heartbeat of Zuora’s global platform. As a mission-critical core team, we architect the foundational systems that power the world’s most sophisticated enterprise businesses. We operate at the intersection of high-scale distributed systems and real-time data innovation, prioritizing long-term engineering excellence and robust, scalable design.

The Opportunity: Leading the Strategic Evolution

We are currently driving a high-stakes evolution from traditional enterprise architecture to an intelligent, event-driven ecosystem.

• Mission-Critical Impact: Your work sits at the center of the global economy, directly enabling the growth of industry-leading organizations.
• The AI-Augmented Frontier: We are pioneering the future of software delivery by embracing an AI-first engineering culture. Our team leverages advanced AI development environments to navigate complex architectural puzzles, allowing our engineers to focus on high-level systems thinking and innovation.
• Global Technical Leadership: This is a rare opportunity to bridge the gap between stable, world-class foundations and greenfield data engineering within a high-talent global hub.

The Mission: Architecting the Future of Billing

Your mission is to ensure our platform remains the definitive global standard for reliability and intelligence. You will solve the industry’s most challenging scale and consistency problems, building a self-healing, high-concurrency engine that defines the future of digital commerce.

This is a location specific position that requires you to come into the office regularly to be most effective. 

What you’ll do

• Architect Mission-Critical Systems: You will design and evolve high-performance, distributed services within our core Java environment. You will be responsible for the architectural stewardship of systems that process billions of transactions, ensuring they remain scalable, robust, and enterprise-grade.
• Drive Real-Time Data Innovation: You will lead the development of sophisticated stream processing pipelines and event-driven architectures. By bridging the gap between foundational data stores and real-time analytics, you will enable the "Intelligence Layer" that defines the future of our global platform.
• Pioneer AI-Augmented Engineering: You will embrace an AI-first development culture, utilizing advanced tools like Claude Code and Codex to navigate complex logic and solve deep architectural puzzles. You will champion engineering excellence, prioritizing disciplined, maintainable design over temporary workarounds.

What You’ll Achieve: Impact & Outcomes

Instead of a list of tasks, these milestones focus on your growth and impact within the team.

• In your first 3 months: You will develop a thorough understanding of our core engine and streaming pipelines. You will successfully use AI-assisted tools to deliver high-quality features and enhancements within our distributed environment.
• By month 6: You will take ownership of a specific service or functional area. You will implement complex streaming or backend features, ensuring they are performant and integrate seamlessly with our real-time data layer.
• Within your first year: You will contribute to the long-term reliability of our platform by resolving technical bottlenecks. You will collaborate with the team to adopt AI-augmented practices and play a key role in the transition toward a more responsive, event-driven architecture

Your Experience (Must-Haves)

To ensure an inclusive applicant pool, we have limited this to core skills essential for success in this role.

• Strong Java Foundations: Significant experience building and scaling services within large codebases using Modern Java, the Spring Framework, and ORM/Persistence Frameworks; committed to delivering clean, maintainable, and disciplined code.
• Distributed Systems & Data Engineering: Expert in architecting stream processing pipelines and managing data consistency in high-concurrency, data-intensive systems; proficient in leveraging Apache Kafka, Apache Flink, Apache Beam, and Change Data Capture (CDC) alongside MySQL, ClickHouse, and Redis to build scalable architectures that support evolving schemas and massive data growth.
• Infrastructure & Deployment: Proven ability to architect and manage cloud-native backend services using AWS and Kubernetes to ensure high availability and system resilience.
• AI-Assisted Productivity: Proficient in utilizing AI-assisted development tools such as Claude, Codex, and Cursor to solve complex engineering puzzles efficiently and increase overall technical leverage.

Nice to Haves

These are not required for application but are areas where you can add immediate value.

• Data & Analytics: Experience with relational database optimization or building real-time data synchronization solutions.
• Cloud Operations: Familiarity with deploying and monitoring services in cloud-native or containerized environments.
• Collaborative Approach: Experience working in a global engineering hub and a desire to participate in technical discussions and learning.

#ZEOLife at Zuora

As an industry pioneer, our work is constantly evolving and challenging us in new ways that require us to think differently, iterate often and learn constantly—it’s exciting. Our people, whom we refer to as “ZEOs" are empowered to take on a mindset of ownership and make a bigger impact here. Our teams collaborate deeply, exchange different ideas openly and together we’re making what’s next possible for our customers, community and the world. 

As part of our commitment to building an inclusive, high-performance culture where ZEOs feel inspired, connected and valued, we support ZEOs with:

• Competitive compensation, variable bonus and performance reward opportunities, and retirement programs
• Medical, dental and vision insurance
• Generous, flexible time off 
• Paid holidays, “wellness” days and company wide end of year break
• More than 10 weeks  fully paid parental leave 
• Learning & Development stipend
• Opportunities to volunteer and give back, including charitable donation match
• Free resources and support for your mental wellbeing  

Specific benefits offerings may vary by country and can be viewed in more detail during your interview process.

Location & Work Arrangements

Organizations and teams at Zuora are empowered to design efficient and flexible ways of working, being intentional about scheduling, communication, and collaboration strategies that help us achieve our best results. In our dynamic, globally distributed company, this means balancing flexibility and responsibility — flexibility to live our lives to the fullest, and responsibility to each other, to our customers, and to our shareholders. For most roles, we offer the flexibility to work both remotely and at Zuora offices.

Our Commitment to an Inclusive Workplace

Think, be and do you! At Zuora, different perspectives, experiences and contributions matter. Everyone counts. Zuora is proud to be an Equal Opportunity Employer committed to creating an inclusive environment for all.

Zuora does not discriminate on the basis of, and considers individuals seeking employment with Zuora without regards to, race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics.

We encourage candidates from all backgrounds to apply. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at)zuora.com.

Summary: Join our Swiss-based blockchain firm dedicated to advancing secure and scalable node infrastructure. As a core team member, you will optimize node performance and develop essential system plugins, leveraging your deep knowledge of JVM and distributed systems.

Responsibilities:

• Optimize performance of blockchain nodes to ensure high reliability and scalability.
• Design and implement core system plugins to enhance infrastructure capabilities.
• Collaborate with cross-functional teams to integrate blockchain solutions.
• Conduct performance testing and debug issues to maintain system efficiency.
• Stay informed on industry trends and emerging technologies in blockchain development.

Required skills:

• Proven experience with Java Virtual Machine (JVM) and its optimization.
• Strong expertise in developing and managing distributed systems.
• Proficiency in blockchain technologies and node infrastructures.
• Excellent problem-solving skills and ability to work collaboratively.
• Fluent in English; knowledge of other languages is a plus.

Summary: Join our established blockchain software house, specializing in enterprise-grade private and public chain solutions. We are seeking a Senior Java Developer to enhance our backend services and contribute to the development of innovative blockchain applications.

Responsibilities:

• Develop and maintain backend services using Java to support blockchain applications.
• Collaborate with frontend developers to integrate APIs with React/Vue interfaces.
• Design, implement, and optimize scalable blockchain solutions for enterprise clients.
• Troubleshoot and resolve complex technical issues related to backend services.
• Stay updated with the latest trends and best practices in blockchain technology.

Required Skills:

• Proven experience in Java development, particularly in a senior role.
• Strong expertise in API integration and development.
• Experience with frontend technologies such as React or Vue.js is beneficial.
• Familiarity with blockchain concepts and technologies is preferred.
• Excellent problem-solving skills and attention to detail.
• Strong communication skills and ability to work collaboratively in a team environment.

WOO X is a global centralised crypto futures and spot trading platform offering best-in-class liquidity and price execution. WOO X has an average daily volume exceeding $1.5 billion and is home to hundreds of thousands of traders worldwide. WOO X traders benefit from radical transparency through our industry-first live Proof of Reserves & Liabilities dashboard and the company's mission to maintain the trust of its growing community of traders. Our team of about 180 highly talented employees works from 12 cities across eight countries in Europe and Asia 🚀

WOO X is a global centralised crypto futures and spot trading platform offering best-in-class liquidity and price execution. WOO X has an average daily volume exceeding $1.5 billion and is home to hundreds of thousands of traders worldwide. WOO X traders benefit from radical transparency through our industry-first live Proof of Reserves & Liabilities dashboard and the company's mission to maintain the trust of its growing community of traders. Our team of 200+ highly-talented employees works from 12 cities across eight countries in Europe and Asia 🚀

Our vision is to inspire confidence, higher performance, and joy in every user. We have a mission to provide the best liquidity on the best terms. We compete not just on price execution but also on integrity, user experience, innovative tools, and global opportunities.

About the opportunity:

We are looking for a Staff / Senior Backend Engineer who can join us along this mission and vision. You’ll become an integral part of the Backend team, responsible for all the development of the backend services that support our WOO X and internal tools 7*24. The heroes keep improving the performance of our trading system and optimising the stability and scalability of our whole ecosystem. Interested? Keep on reading!

What you’ll be working on:

• Design, build, and optimize backend services for a high-performance, low-latency trading platform.
• Develop and maintain robust, scalable APIs (RESTful and WebSocket) using Java + Spring Boot, supporting real-time trading and market data.
• Architect and implement highly concurrent systems that ensure 24/7 system reliability and throughput.
• Collaborate closely with cross-functional teams (Product, Business, DevOps) to align technical solutions with business goals.
• Troubleshoot complex production issues, identify root causes, and propose effective, scalable fixes.
• Contribute to system architecture and design discussions, and promote best engineering practices through code reviews and technical mentorship.
• Demonstrate potential for technical leadership, with the ability to drive initiatives and influence technical direction across the team.

Why work with us:

Join us in realising our vision in advancing decentralisation, and leading innovation in CeFi. Enjoy work flexibility, a supportive team, and an environment that nurtures your ideas. Plus, expect a performance-based annual bonus for all contributors at WOO 💪

About you:

• 5+ years of backend development experience, with deep proficiency in Java and Spring Boot / Spring Cloud.
• Strong knowledge of multithreading, concurrency models, and asynchronous programming.
• Experience building high-concurrency, high-availability backend systems in production environments.
• Familiar with message brokers (e.g., Kafka, RocketMQ), databases (MySQL/PostgreSQL), and in-memory stores (e.g., Redis).
• Solid experience with containerized environments (Docker, Kubernetes) and Linux-based systems.
• Proven track record of independently solving complex backend/system-level problems.
• Excellent communication skills and ability to work effectively with cross-functional stakeholders.
• Previous experience in financial services, trading systems, or crypto exchanges is a strong plus.
• Experience mentoring others or demonstrated potential for technical leadership is a significant advantage.

Getting the job

We're actively seeking talented individuals to join our team outside of our typical hiring schedule. This proactive approach allows us to connect with exceptional candidates like you even before specific positions become available.

On average, successful candidates go through five rounds of interviews and tests. Our hiring process begins by meeting with our People Team, who help facilitate the process of placing you in your new role. You can expect to share your experience and ideas in online video interviews with our hiring team, made up of management and potential new colleagues.

Submitting your resume now ensures that you're first in line when new opportunities arise. By doing so, you'll have a head start in the selection process and get a chance to showcase your skills and experience.

Get started on your application here!

Important to read before submit application: This role must be physically based in China.

We are hiring 2 Staff Software Engineer positions for different teams under the Community Support Platform. 

The Community You Will Join:

Community Support (CS) has increasingly become a key driver of enabling Airbnb's core business. Community Support Engineering is responsible for the world-class technology, architecture, and solutions that power CS at Airbnb. The products and capabilities we build empower our guests and hosts, CS agents, and operations teams around the world. As a member of CSP in China, you will have a great opportunity to make lasting impacts on the Airbnb CS user experience.

The Difference You Will Make:

We are seeking a highly skilled and motivated engineer who is passionate about making a difference through their work. As a Staff Software Engineer, you will be the technical lead in a team of talented and diverse software engineers leading the project execution to improve Airbnb customers and agents experience. You will lead the team and work with global technical leaders to build and evolute CS engineering foundations, such as Routing, Data platform, Case management, foundational toolings etc

A Typical Day: 

• Collaborating with cross-functional partners to deeply understand business problems before developing project solutions.
• Leading the execution of projects across the full software development lifecycle, including technical design, implementation, testing, and deployment, ensuring solutions are high-quality, scalable, and performant; 
• Driving productive and constructive technical discussions with peers and cross-team technical leaders in the global collaborative working environment, to ensure alignments with technical strategies across CS products and capabilities.
• Tackling highly complex technical challenges, proactively identifying and mitigating potential risks during project execution.
• Writing exemplary and high-quality codes and design documents that set the standard for the team.
• Advocating for and embedding engineering best practices within the team, ensuring a culture of technical excellence.
• Actively coaching and mentoring engineers across the CSP China team to foster growth and elevate technical capabilities.
• Supporting team growth by participating in recruiting efforts and conducting interviews.
• Promoting and exemplifying an engineering culture with inclusiveness, effective communication, and quality. 
• Being a collaborative and supportive teammate who inspires and elevates the entire engineering organization.

Your Expertise:

• 9+ years of software development experience.
• Strong proficiency in at least one major backend programming language (e.g., Java, Kotlin, Scala, Python); experience with modern front-end frameworks (e.g., React, Angular, Vue.js) are preferred but not a must.
• Proven track record of delivering end-to-end products in a collaborative environment globally.
• Experience with architectural patterns of large-scale web applications, including well-designed APIs, high-volume data pipelines, and efficient algorithms.
• Demonstrated ability to make data-driven decisions, articulate technical trade-offs, and communicate effectively with cross-functional partners.
• Passion for creating intuitive user experiences and a keen interest in data systems and analytics.
• Bachelor's degree in Computer Science or related field, or equivalent practical experience.
• Fluent in both English and Chinese.

Your Location:

This position is China - Remote Eligible. The role may include occasional work at an Airbnb office or attendance at offsites, as agreed to with your manager. Your recruiter will inform you what cities you are able to work from depending on your personal legal working identity and Airbnb internal policies.

Our Commitment To Inclusion & Belonging:

Airbnb is committed to working with the broadest talent pool possible. We believe diverse ideas foster innovation and engagement, and allow us to attract creatively-led people, and to develop the best products, services and solutions. All qualified individuals are encouraged to apply.