■ 業務内容
　・ゲームエンジンの動作テスト
　・ゲームエンジンや専用スクリプトを使ったサンプルの実装
　・開発環境やゲームエンジンの仕様に関するドキュメンテーション

組織・チーム紹介

私たちは、PlayStation コンソールを通して、世界中のプレイヤーがつながり、共に楽しみ、感動を共有できるエンタテインメント体験を提供しています。本チームは、プロフィール、フレンド、メッセージ、パーティーなどのソーシャル機能を通じて、オンラインでのコミュニケーション体験を支える重要な役割を担っています。PlayStation コンソール上で動作するクライアントアプリケーションと、それを支えるサーバーアプリケーションの両方を自社で開発しており、全世界で 1 億 2,000 万人を超える月間アクティブユーザー（MAU）に向けたサービスを提供しています。
Webやクラウドといった汎用的な技術を活用しつつ、世界最大級のトラフィックを支えるスケーラブルなシステムを構築・運用するなど、他ではなかなか経験できない技術的チャレンジが待っています。また、海外チームとの協働も非常に活発で、英語を使ったミーティングや日常的なコミュニケーションを通じて、グローバルな環境で技術力と語学力の両面を磨くことができます。
キャリア志向に応じて、将来的にはリーダーとしてチームを率いることも、フルスタックエンジニアとして専門性を深めることも可能です。自社サービスの中でゼロから機能開発に携わり、世界中のプレイヤーに直接価値を届ける手応えを感じることができます。
チームは 20〜30 代を中心とした若い世代で構成されており、技術・コスト・効率・ユーザビリティ・UX など多面的な観点からフラットに議論ができる文化があります。
ゲームやネットワークサービスが好きで、製品への思い入れを持つメンバーが多く、海外拠点との連携を通じてグローバルな視点でサービスを進化させています。
PlayStation の未来を支え、世界中のプレイヤーに新しいつながりと体験を生み出すことに情熱を持てる方をお待ちしています。

職務内容

PlayStation のソーシャル機能（フレンド機能を中心）の設計・開発・運用を担当していただきます。PlayStation コンソール上のアプリケーションから、クラウド上のサーバーアプリケーションまで幅広く関わり、世界中のプレイヤーがつながる体験を支えるエンドツーエンドの開発に携わります。クライアント・サーバー双方のエンジニア、デザイナー、プロダクトマネージャーなどと協働しながら新機能を開発します。PlayStation という大規模プラットフォーム上で、1億人を超えるユーザーに利用される高信頼・高パフォーマンスなシステムを構築・改善します。また、職場環境としてはリモートワークを基本とした柔軟な働き方が可能です。一方で、社内ハッカソンやソーシャルイベントなど、対面でのコミュニケーションの場も活発に設けられており、チーム内外での情報共有や技術的な刺激を得やすい環境があります。

[具体的な職務例]

• PlayStation コンソールアプリケーションおよび関連 SDK の設計・開発（JavaScript / TypeScript, C++）
• ソーシャル機能を支えるサーバーアプリケーションおよび API の設計・実装（Java, JavaScript / TypeScript）
• クライアントとサーバー間の通信仕様設計、パフォーマンスチューニング
• 新機能のUX改善や機能拡張に向けたチーム内議論・プロトタイピング
• 海外拠点を含むグローバルチームとの協働による仕様検討・開発調整
• 継続的デリバリー、テスト自動化、モニタリングなどの運用改善

[使用技術・環境（例）]

• 言語：C++, C#, Java, Python, JavaScript / TypeScript
• インフラ：AWS / Kubernetes / Docker
• コラボレーション：GitHub Enterprise, Jira, Confluence, Slack

求められる実務経験・スキル・人物像

【必須（MUST）】

• チームでのソフトウェア開発経験（3年以上目安）
• JavaScript / TypeScript を用いたクライアントアプリケーション開発経験
• ネットワーク通信を伴うクライアントまたはサーバーアプリケーションの設計・実装経験
• 基本的な Linux 環境での開発経験・知識

【歓迎（WANT）】

• C++、Java など、いずれかの言語を用いたアプリケーション開発経験
• クライアント／サーバー双方の開発経験、またはフルスタック志向
• Web API の設計・開発経験
• クラウド環境（AWS など）での開発・運用経験
• SDK またはライブラリ開発経験
• チームリーディングや技術的な意思決定の経験
• 大規模ユーザー向けネットワークサービスの開発・運用経験

【求める人物像】

• チームでの協働を大切にし、オープンなコミュニケーションができる方
• クライアント－サーバーの垣根を超えた開発に取り組みたい方
• ユーザー体験やインタラクションデザインに関心を持ち、プロダクトの価値向上を意識して開発できる方
• 新しい技術や未経験の領域にも前向きに取り組める方
• 世界中のプレイヤーに価値を届けるサービス開発に情熱を持てる方

【語学力 / Language Skills】

英語：グローバルチームとの連携のため、チャット・メール・会議などの基本的なコミュニケーションスキル
※ただし、現時点の語学力よりも、向上への意欲を重視します

日本語：ビジネスレベルの日本語力（日本語能力試験N1またはそれと同等以上）

経験レベル
ジュニアからシニア

雇用形態
フルタイム (1日8時間)

上司
テクニカルディレクター

部署
PlayStation Studios Team ASOBI / テクノロジーチーム

勤務場所
東京エリア

About Team ASOBI
Team ASOBIは、東京に拠点を置くPlayStationのファーストパーティスタジオで、PS5向けの大ヒット作『ASTRO BOT』を手掛けたチームです。遊び心にあふれたスタジオで、情熱を持った優れた才能たちが、協力しながら素晴らしい作品を生み出しています。今後も世界中から新たな才能を迎え入れ、さらなる成長を目指しています。Team ASOBIの使命は、すべてのプレイヤーが楽しめる、高品質で革新的なゲーム体験をPlayStationで提供することです。   

▪️詳しい情報はPlayStation Blogをご覧ください！  https://blog.ja.playstation.com/2024/09/05/20240905-astrobot/ 

Role overview
チームが最大限の力を発揮できるよう快適な開発環境を構築し、維持することはタイトル開発プロセスにおいて非常に重要な要素となっています。開発機材の選定や保守、ビルド環境やデータ管理の改善など開発環境の構築を技術面からサポートしていただきます。  

Responsibility

• 開発機材の選定、管理、導入と更新の計画を行います
  
• オフィスと倉庫の機材を管理し、整頓された状態を保ちます 
• 社内ＩＴチームと連携し、サーバ構築やメンテナンスの計画を行います 
• 開発環境全体を把握し、メンバー加入時や更新時のセットアップをサポートします
• 開発機材やＩＴ周りのトラブルに対応します
• 開発イテレーション（コード変更・ビルド・テスト・リリースとデータ共有）における問題点を把握し改善を行います 

求める経験とスキル

• IT関連業務の経験（３年以上）
• Git, Perforce, Jenkins等ゲーム開発環境で利用されるソフトウェアの運用経験
• PCやモニタなどの開発機材やゲーミングデバイスに関するトレンドの把握
• Linux・Windowsサーバ, クラウドサービスの基本的な知識
• Python, PowerShell等での自動化のためのスクリプト開発経験
• 制作ツール開発の経験 (C++, C#, Maya Python)があれば尚可
• ゲームランタイムの実装経験があれば尚可
• チームからニーズを集めるための優れたコミュニケーションスキル
• 議論を効率的に進めるための積極的なコミュニケーション
• 仕事の質を自己評価する能力
• 英語の学習意欲のある方を歓迎（英会話レッスンを受講可能） 

About Team ASOBI
Team ASOBI is a first-party PlayStation Studio located in Tokyo, Japan, responsible for the critically acclaimed ASTRO BOT for PS5. The team is looking to expand by bringing worldwide talents with high skills, passion, and a playful, collaborative mind.  The Studio has a mission to create top quality, innovative games for players of all ages on PlayStation.
Want to learn more? Head over to the PlayStation Blog: PlayStation Blog .

Role overview
Creating and maintaining a well-functioning development environment that allows the team to reach their full potential is a crucial part of our game development process. You will provide technical support for the construction of our development environment, including the selection and maintenance of equipment, as well as the improvement of our build environment and data management process.

Responsibilities

• Select, manage, set up, and plan updates of development equipment.
  
• Manage office and warehouse equipment and maintain an organized state. 
• Work with the internal IT team on server builds and maintenance plans.
• Understand the entire development environment to give support when new members join the studio and when updates take place.
• Respond to problems related to development equipment and IT.
• Identify and improve issues regarding development iterations (code changes, builds, tests, releases, and data sharing) 

Required Skill and Experience 

• IT-related work experience (3 years or more) 
• Experience with software used in game development such as Git, Perforce, Jenkins, etc. 
• Understanding of trends in development equipment such as PCs, monitors, and gaming devices. 
• Basic knowledge of Linux/Windows servers and cloud services. 
• Experience developing scripts for automation in Python, PowerShell, etc. 
• Experience in production tools development (C++, C#, Maya Python) is a plus. 
• Experience implementing game runtimes is a plus. 
• Excellent communication skills to gather needs from the team. 
• Proactive communication to facilitate discussions effectively. 
• Ability to self-evaluate quality of work. 

Language proficiency

• Basic Japanese language skill is required alongside desire to improve (lessons will be provided and paid for). 

「Team ASOBI」
https://www.teamasobi.com/jp/ 

Get to know Okta Okta is the World’s Identity Company. We enable everyone to safely use any technology—anywhere, on any device or app. The Okta Platform and Auth0 Platform enable secure and flexible access, authentication, and automation, transforming people's experience in the digital world and putting Identity at the heart of business security and growth.

At Okta, we welcome diverse perspectives and experiences. We aren't looking for someone who checks every single box. We are looking for lifelong learners and people who can make our team better with their unique experiences. Join our team! We are building a world where Identity belongs to you.

As a member of the Okta Japan SE team, the Senior Solutions Engineer for the Auth0 Platform will serve as a key technical and business advisor to customers and partners. Leveraging a passion for technology and deep expertise, you will plan, propose, and demonstrate how Auth0 solutions solve critical business challenges for stakeholders ranging from field practitioners to C-level executives throughout the sales cycle. Consequently, you will directly contribute to achieving quarterly and annual sales targets in Japan.

What you’ll be doing

• Collaborate with the sales team and related departments to act as an authority on technology and the Identity Security domain, ensuring customers fully understand the value and potential of the Auth0 Platform.
• Communicate the value of implementing Auth0 solutions to customers in various positions (practitioners, managers, C-level) and earn their trust.
• Serve as a primary technical resource, confidently responding to product functionality questions and detailed technical inquiries from customers, partners, and internal Auth0 teams.
• Drive knowledge sharing by contributing to and utilizing best practices and reusable assets, proactively elevating the expertise and efficiency of the entire SE team.
• Support customer Proof of Concepts (PoCs) to technically demonstrate that implementing Auth0’s identity solutions will deliver value to the customer.
• Participate as a presenter and demonstrator in online or offline events aimed at evangelizing Auth0.
• Lead less experienced sales representatives and SEs, contributing to constructive performance improvement of the entire team through appropriate feedback.

What you’ll bring to the role

• Experience in customer-facing roles as a Pre-sales SE or Technical Sales.
• Ability to build and maintain strong relationships of trust with customer technical staff and leaders throughout the sales process.
• Native-level Japanese proficiency with excellent communication and reading comprehension skills.
• Ability to ask questions and express opinions in English via email, Slack, or one-on-one conversations.
• Joy in spreading industry-leading solutions that benefit society.
• Enjoyment in collaborating with Okta’s expanding partner community in Japan and working with Pre-sales Engineers around the world.
• A desire to become a top-tier Solutions Engineer by refining pre-sales skills, not just product and authentication technology knowledge.

And extra credit if you have experience in any of the following!

• Pre-sales experience in an organization using sales methodologies such as SPIN, Solution Selling, or MEDDICC.
• Experience with Identity & Access Management (IAM), Single Sign-On (SSO), Security, or API-based solutions.
• Experience using at least one standard network security protocol (OAuth 2.0, OpenID Connect, SAML, LDAP, etc.).
• Knowledge/Experience with Cloud Platforms (AWS, GCP, Azure) and tools such as Kubernetes, Terraform, or Serverless environments.
• Hands-on development experience in one or more of the following areas: Web Development (JavaScript, HTML, Front-end frameworks), Mobile Development (iOS, Android), Backend Development (Java, C#, Node.js, Python, PHP, Ruby), or IP-based real-time communications.
• Knowledge of modern technologies such as Generative AI, Intelligent Agents, and Conversational Bots.
• Understanding of core application security (Password Hashing, SSL/TLS, EAR, XSS, XSRF).
• Experience speaking at technical conferences/webinars or writing technical blogs.
• Experience working as a software developer.
• Experience communicating and working with overseas engineers in English.

What you can expect as an Okta employee

• Benefits
• Social Impact (Okta for Good)
• Okta's People, Connections, and Community

Okta builds a dynamic work environment by providing the best tools, technology, and benefits so that employees can work productively in an environment that suits their needs. Each organization has a unique way of working with flexibility and mobility so that every employee can be their most creative and successful self, regardless of where they live. Find your place at Okta today!

Okta is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, ancestry, marital status, age, physical or mental disability, or status as a protected veteran. We also consider qualified applicants with criminal histories, consistent with applicable legal requirements.

#LI-Hybrid
#KH-1
P24422_3330489

Required:

• 3+ in Windows desktop application development using Windows App SDK, WinUI (or similar), C#, XAML — and ideally additional experience with native Windows code (C++, Win32/WinRT/COM).
• Deep understanding of Windows application architecture, including interop between managed code (.NET) and native code.
• Proven track record of designing, building, and shipping production-quality desktop applications, with an emphasis on reliability, performance, scalability, and maintainability.
• Strong experience with accessibility APIs on Windows (e.g. Microsoft UI Automation or similar), and a dedication to building accessible and inclusive software.
• Excellent software engineering fundamentals: OOP, design patterns, data structures, algorithms, memory management, multi-threading or asynchronous programming (where relevant).
• Experience leading technical design, mentoring other engineers, conducting code reviews, and making architecture-level decisions.
• Strong communication skills; ability to articulate tradeoffs, collaborate with cross-functional teams, and drive consensus.
• A user-centric mindset: focus on building polished, intuitive, and accessible experiences for end users.

Preferred / Bonus:

• Experience with writing automated tests for UI — unit tests, integration tests, UI automation tests; familiarity with relevant testing frameworks.
• Experience with performance optimization for desktop apps (memory usage, startup time, rendering performance, high-DPI support, responsiveness under load).
• Experience with localization/globalization, right-to-left UI support, internationalization, accessibility for multiple regions.
• Familiarity with telemetry, analytics, crash reporting, logging, and error monitoring in desktop applications.
• Previous experience in shaping CI/CD workflows, release pipelines, and deployment strategies for desktop applications.
• Demonstrated ability to take ownership of feature areas or modules and drive them long-term, including maintenance, refactoring, and technical debt management.

What we offer

• A high-impact role: you will define architecture, shape the future of our Windows product, and directly influence what millions of users see and experience.
• A collaborative, flat-structure engineering culture — you are not just a coder, but a builder and a decision-maker.
• Opportunities to lead — mentor others, steer technical direction, and grow into broader technical leadership (e.g. Tech Lead, Architect).
• Flexibility, autonomy, and responsibility: you define how to solve problems, own features end-to-end, and contribute to long-term product vision.
• A purpose-driven mission: building software that’s reliable, accessible, and user-centered — making a real difference for people.                  

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.

Job Description: Technical Support Engineer (APAC), BILINGUAL Japanese-English

Software Products can have defects. We help customers identify them and eliminate their impact so they can focus on their primary job! Our products involve highly sophisticated, cutting-edge software algorithms to detect critical defects and security vulnerabilities in source code. Therefore, our technical support issues can be highly complex --- solving them requires intelligence, intuition, insight, and true technical expertise.

About Black Duck Software, Inc.

Black Duck Software, Inc. helps organizations build secure, high-quality software, minimizing risks while maximizing speed and productivity. Black Duck, a recognized pioneer in application security, provides SAST, SCA, and DAST solutions that enable teams to quickly find and fix vulnerabilities and defects in proprietary code, open source components, and application behavior. With a combination of industry-leading tools, services, and expertise, only Black Duck helps organizations maximize security and quality in DevSecOps and throughout the software development life cycle.

Key Responsibilities:

• Customer Advocacy: Serve as the Single Point of Contact (SPOC) for strategic customers. Act as a trusted advisor, understanding their environment and business goals.
• Troubleshooting: Diagnose and resolve complex technical issues (C/C++, C#, Java) via phone, email, and online meetings.
• Collaboration: Work closely with R&D and peers to provide effective solutions and reproduce customer issues.
• Knowledge Sharing: Create and share technical knowledge internally and with customers.
• Incident Management: Manage case queues effectively, prioritizing heavy workloads in a fast-paced environment.

Must-Have Qualifications

1. Education & Experience:

• Bachelor’s degree (or equivalent) in Computer Science or related field.
• 3–5 years of experience in technical support or software development.

1. Technical Skills:

• Proficiency in C/C++ and/or Java programming.
• Hands-on experience with Linux/Unix environments (e.g., shell scripting).
• Database experience (e.g., PostgreSQL/SQL).

1. Soft Skills:

• Exceptional written and verbal communication skills in English.
• Customer-centric mindset with a focus on delivering outstanding support.
• Ability to troubleshoot complex technical issues independently.

Nice-to-Have Qualifications

• Language: Proficiency in Japanese (Highly desirable for local support).
• Technologies:
• Experience with Kubernetes or Containerization.
• Database experience (SQL/NoSQL).
• Tools: Experience using Salesforce.com for case management.
• Domain Knowledge: Background in Application Security (AppSec), SAST, SCA, or DAST tools.

Work Environment: Fast-paced, collaborative, and results-driven. Occasional off-hour shifts may be required to support global customers.

Niantic/ Scopley, creator of hit games including Pokémon GO, Pikmin Bloom, and Monster Hunter Now is seeking a Client Engineer to help shape the future of our games by building high-quality, scalable gameplay systems that delight and engage our passionate players. We're a fast-paced, multi-disciplinary team of game makers, software developers, and creative professionals based all over the world. In this role, you will lead the technical design and implementation of cross-platform mobile experiences, driving performance, reliability, and engineering excellence — living up to our ambitious vision of merging the virtual with the real world and inspiring people to explore together!

Responsibilities

• Lead the technical design and implementation of engaging, scalable gameplay systems for a large and active user base.
• Own cross-platform development across mobile (iOS/Android), ensuring code is reusable, maintainable, and performant across multiple environments.
• Drive performance optimization and reliability, including profiling, debugging, and troubleshooting complex issues on mobile devices.
• Collaborate cross-functionally with engineers, product managers, game designers, and UX designers to deliver high-quality user experiences.
• Provide technical leadership and mentorship to other engineers through code reviews, design reviews, and knowledge sharing.
• Contribute to engineering excellence, including improving development processes, testing practices, and overall code quality.
• Required in-office 3 days on Tuesday, Wednesday, and Thursday.

Qualifications

• BS in Computer Science or a related technical field, or equivalent practical experience.
• 5+ years of professional experience in game development, with strong expertise in Unity and/or other game engines.
• Proficient working in C# or C++.
• Embraces generative AI with curiosity and good judgment, using it responsibly to improve tooling, testing, debugging, prototyping, and overall product quality.
• Ability to work in a fast-paced hybrid environment and handle stress appropriately and/or ability to solve practical problems and be sufficiently adaptable to handle dynamic situations with little advance notice. 
• Experience working on cross-functional teams with ability to communicate effectively through written and verbal communications, including synchronous interactions with others.
• Japanese language skills (intermediate - Business level)

Plus If…

• Have mobile or console game performance optimization experience.
• Experience with shader programming (e.g., GLSL, HLSL, Metal).
• Passion for building products that connect people through shared real-world or interactive experiences.

Shift Technology Japan offers a unique opportunity to brilliant candidates to accelerate their careers in data science

• Data scientists work on a broad range of subjects, acquiring a lot of technical and professional experience in data science, data engineering, coding, business understanding and client interactions; skills invaluable in any career.
• Our company is small enough that each person’s achievements have an impact on overall performance, yet big enough to be a world leader in our domain.
• We are a fast growing company, the best contributors will grow to managerial or product tech lead positions much more rapidly than in bigger companies

役割

データ・サイエンス・チームの一員として、私達の技術エキスパートと協働し、顧客企業に種々のソリューションを提供する上で重要な役割を果たして頂きます。

日々の業務には次の事が含まれます：

- 顧客企業のためのデータ処理パイプラインの構築と導入。バッチもしくはリアルタイムのデータ受領、データクリーニング、情報抽出、不正検出モデルの調整などが含まれます。- 顧客企業と密に連携してニーズ、フィードバックを把握し、ソリューションを改善します。- 製品開発とイノベーションのための研究開発（機械学習、画像分析、NLP、トレンド分析、チャットボット…）- 営業チームと協働し、製品デモの実施（そして、海外への出張も含まれます！）- 若手データ・サイエンティストの育成

What you'll do...

• As a member of the data science team, and working alongside our technical experts, your role will be key to roll-out our different solutions to the clients. Your day-to-day will include :
• Deployment and Localization of Shift Technology products for the Japanese Market
• Design new fraud detection algorithms to detect new complex fraud patterns
• Enhancement of the Global Solution working with the Head Office
• Work closely with clients to understand the data and Business context of various Business lines in order to integrate to the Solution's Model

What you bring...

• You have a master’s degree in either Mathematics, Statistics, Computer Science (a knowledge in machine learning and/or Big Data is a plus)
• You have experience in object-oriented programming, preferred in C#, and SQL
• You can write quality production code
• You combine Data analysis with synthesis abilities and are not afraid to deal with the details
• You are Fluent in Business Japanese as well as business English 

In addition:

• You have experience with the following technologies: Python, Git, Cloud, Machine Learning
• You have experience with external client-facing and pre-sales/demo
• You have knowledge in Insurance industry 

Recruitment process:

• Talent Acquisition interview
• Technical exercise
• Technical interview
• Hiring manager interview
• Touchpoint with Tokyo-based stakeholders

Shift Technologyについて

Shift Technologyは Wired 社によりパリの最もホットなスタートアップ企業に選ばれ、先進的な人工知能技術とデータ・サイエンスを活用して、保険会社が保険金請求プロセスについて如何に思考するかを変革しています。パリのHQに始まり、ボストン、東京、シンガポール、ロンドン、マドリード、チューリッヒのオフィスで、顧客企業が不正の疑いのあるケースを検出し、対策を取るためのお手伝いをしています。私達はクレーム処理の自動化を通して業務効率および顧客体験の改善のためのサポートをしております。５年に満たない間に、およそ70ものグローバルな保険業界において重要な顧客企業のために数百万件ものクレームを分析してきました。Shift Technologyについてより詳しく知るために是非ご連絡ください。

Job Description

This is an opportunity for students and researchers of advanced data modeling and statistical learning methods to apply these techniques to market prediction and systematic trading.

Job Responsibilities

• Pre-process (validate, clean, normalize, reduce dimension) very large data sets for model estimation and event studies
• Identify features and relationships useful for the predictive modeling of market dynamics

Desirable Candidates

• Undergraduate, MS, or PhD candidates in finance, computer science, mathematics, physics, or other quantitative discipline
• Programming in any of the following: C++, Java, C#, MATLAB, R, Python, or Perl
• Strong analytical and quantitative skills
• Demonstrated interest in financial markets and systematic trading
• Clear, concise, and proactive communicator
• Detail-oriented
• Willing to take ownership of his/her work, working both independently and within a small team

The annual base salary is $120,000-$180,000 (USD) which will be prorated based on internship start and end date. Actual compensation offered to the successful candidate may vary from posted hiring range based upon geographic location, work experience, education, and/or skill level, among other things.

About Appier 

Appier is an AI-native Agentic AI as a Service (AaaS) company that uses artificial intelligence (AI) to power business decision-making. Founded in 2012 with a vision of democratizing AI, Appier’s mission is turning AI into ROI by making software intelligent. Appier now has 17 offices across APAC, Europe and U.S., and is listed on the Tokyo Stock Exchange (Ticker number: 4180). Visit www.appier.com for more information.

About the role

Appier's Playable Ads team (https://www.appier.com/en/blog/what-is-playable-ads)  builds AI-powered playable and video ad experiences that drive dramatically higher engagement and conversion for the world's leading apps and games. We're looking for a Senior Backend Developer with deep expertise in distributed systems and modern backend architecture to design and build the scalable, high-performance services behind these experiences — from creative generation pipelines to the infrastructure that brings our ML models to production. You'll work across microservices, messaging systems, data persistence layers, and system performance optimization, while partnering with ML scientists on MLOps workflows to continuously ship and serve new model versions to end users. You'll also collaborate closely with frontend engineers and product managers to deliver seamless, cross-functional outcomes.

If you're passionate about building backend systems that operate at scale, thrive in cross-functional teams, and want your code to directly power AI-driven ad experiences reaching millions of users, we'd love to talk.

What You'll Work On

• Architect and develop robust, scalable backend services and APIs using ASP.NET Core, owning sizable projects from system design through production operation.
• Design efficient database schemas and optimize data access logic across SQL and NoSQL data stores.
• Implement message-driven communication with high reliability and fault tolerance.
• Partner with ML scientists to build and maintain MLOps pipelines — including model versioning, deployment, serving, and monitoring — ensuring new models are reliably delivered to production.
• Lead system designs, drive technical roadmap decisions, and provide guidance to team members.
• Proactively identify performance bottlenecks, profile critical components, and implement scalable solutions.
• Own and continuously improve system observability, incident management, CI/CD pipelines, and deployment workflows.
• Explore and integrate AI-assisted development tools and emerging technologies to boost team productivity.
• Participate in on-call rotation to ensure product reliability and scalability.

What We're Looking For 

[Minimum qualifications]

• Proficiency in C# and ASP.NET Core, or experience with other object-oriented languages (e.g., Java, Go) with willingness to cross-train in the .NET stack.
• Proven experience in distributed systems, microservice architectures, and designing scalable backend systems.
• Strong expertise in PostgreSQL, MongoDB, or equivalent SQL/NoSQL databases, with hands-on experience in ORM frameworks such as Entity Framework Core.
• Advanced knowledge of message broker systems such as RabbitMQ, Kafka, or NATS.
• In-depth understanding of IO-bound operations, threading, parallelism, and asynchronous programming.
• Practical experience with Docker, container-based deployment workflows, and cloud platforms (AWS, GCP, or Azure).
• Hands-on experience with CI/CD pipelines, observability tooling, and production operational practices.
• Demonstrated ability to write clean, well-documented code and solve complex problems analytically.
• Clear communicator who can explain technical decisions to both technical and non-technical stakeholders and enjoys working in a fast-paced, collaborative environment.
• Proficient in using LLM-powered development tools (e.g., GitHub Copilot, Cursor, ChatGPT) to accelerate productivity.

[Preferred qualifications]

• BS/MS degree in Computer Science or a related field.
• Experience with MLOps practices such as model serving infrastructure, A/B testing frameworks, or ML pipeline orchestration tools.
• Leadership experience such as mentoring junior engineers, leading code reviews, or facilitating agile processes.
• Experience with performance profiling and debugging tools, high-performance network services, or FFI integrations for performance-critical components.
• Solution-oriented mindset with a focus on system sustainability, and willingness to explore emerging technologies into backend systems.

[Language]

Fluent in English, Japanese language proficiency is not required.

Open to overseas candidates/Visa Support
This position can be based in Tokyo, Japan or Taipei, Taiwan. For international candidates, Appier's Japan office provides visa sponsorship to ensure a smooth relocation transition to Japan.

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