Who we are

The role

At Helsing we develop and deliver AI-based capabilities and the enabling infrastructure that allow semi-autonomous platforms to localise, navigate, and perceive the world in real time. We build software that is subject to significant and unorthodox technical constraints, must operate in a wide variety of constantly-changing environments, and has to support an ever-growing list of challenging use-cases. What we build ultimately ends up in the hands of real people in high-risk, high-stress situations, so must be both reliable and frictionless. Taken together, this brings a whole host of interesting engineering challenges across a wide variety of fields that you’ll help us solve. To give some examples:

• Distributed systems (e.g., intermittent connectivity and byzantine actors)

• Embedded computing (e.g., resource-constrained compute and reverse-engineering)

• Robotics (e.g., control systems and tasking)

• Networking (e.g., long-range low-bandwidth radios and cross-medium routing)

• Deployment infrastructure (e.g., air-gapped devices and heterogenous fleets)

• Security (e.g., data sharing in low-trust, no-TLS networks and actually-secret data handling)

• Machine learning (e.g., systems for model development, storage, and dissemination)

In several of these areas, we are working near the state-of-the-art; we actively read (and sometimes implement) research papers, and often need to push even further to make theory work in practice. In others, we are applying well-known techniques to real-world situations (with real-world limitations) that have never been used in before, which requires skill, diligence, and honing a deep understanding of the underlying technologies.

The day-to-day

• Review code contributions, proposals, and RFCs from colleagues. At Helsing we strongly believe that unblocking others takes precedence over spending more time on your own work.

• Propose and implement new features, capabilities, algorithms, infrastructure, or even full products across our stack. We encourage our engineers to look beyond their immediate team for missed opportunities, and to speak up when they identify one.

• Become a mentor, find a mentee, and help support and develop our interviewing pipeline. The people make or break the company, and we want as many engineers as possible to be part of fostering and growing the organisation.

• Share your experience and technical know-how with other Helsingers. We host tech talks, get together for smaller “let’s learn together” groups, run topical office hours (e.g., on Rust), etc. to help each other get better with time.

• Maintain our existing software stack, including working with internal and external customers to identify issues, improving operational reliability and performance, and fending off technical debt. The stack is a mix of Rust and Python, with Python mainly living in the ML-heavy sections.

• Further develop our tests and benchmarks, both at the micro and macro level. We operate in a domain where robustness is of the utmost importance, and an extensive and ever-improving test suite is key to achieving that. And without thorough benchmarks, we would be flying blind.

• Present your work at our weekly demo sessions. We want engineers to come together around what they are working on and to feel like they are not endlessly squirrelling away at something that doesn’t matter. To that end, we host (and actively work towards) demo sessions that allow early feedback, celebration of progress, and a better shared understanding of everything that goes on at Helsing.

You should apply if you

• Can write legible, maintainable, and performant code.

• Communicate well in English, both verbally and in writing.

• Enjoy collaborating with others, including reviewing code and pair programming.

• Are comfortable working asynchronously (writing PRs and RFCs, having discussions by email).

• Have backend development experience, ideally with a language like Rust, Java, Go, or C++.

• Are familiar with backend interface tools like REST, GraphQL, gRPC/Protocol Buffers, and Arrow.

• Strive to improve yourself, your peers, and the culture you work in over time.

• Feel like ethical considerations are an inherent part of engineering.

Note: We operate at an intersection where women, as well as other minority groups, are systematically under-represented. We encourage you to apply even if you don’t meet all the listed qualifications; ability and impact cannot be summarised in a few bullet points.

Nice to have

• Rust and Python specifically.

• Container-based and cloud-native application architectures (e.g., Docker, Azure, AWS).

• Metrics tooling (e.g., Prometheus, Grafana, ELK).

• SQL and streaming database systems.

• Routing protocols (e.g., IGP, BGP).

• Cryptographic protocols (e.g., Signal, WireGuard).

• Hardware interfaces (e.g., Arduino).

• Robotics (e.g., control systems).

• Production ML systems.

Join Helsing and work with world-leading experts in their fields 

• Helsing’s work is important. You’ll be directly contributing to the protection of democratic countries while balancing both ethical and geopolitical concerns. 

• The work is unique. We operate in a domain that has highly unusual technical requirements and constraints, and where robustness, safety, and ethical considerations are vital. You will face unique Engineering and AI challenges that make a meaningful impact in the world. 

• Our work frequently takes us right up to the state of the art in technical innovation, be it reinforcement learning, distributed systems, generative AI, or deployment infrastructure. The defence industry is entering the most exciting phase of the technological development curve. Advances in our field of world are not incremental: Helsing is part of, and often leading, historic leaps forward. 

• In our domain, success is a matter of order-of-magnitude improvements and novel capabilities. This means we take bets, aim high, and focus on big opportunities. Despite being a relatively young company, Helsing has already been selected for multiple significant government contracts.  

• We actively encourage healthy, proactive, and diverse debate internally about what we do and how we choose to do it. Teams and individual engineers are trusted (and encouraged) to practise responsible autonomy and critical thinking, and to focus on outcomes, not conformity. At Helsing you will have a say in how we (and you!) work, the opportunity to engage on what does and doesn’t work, and to take ownership of aspects of our culture that you care deeply about. 

What we offer

• A focus on outcomes, not time-tracking

• Competitive compensation and VSOP options

• Relocation support

• Social and education allowances

• Regular company events and all-hands to bring together employees as one team across Europe

• A hands-on onboarding program (affectionately labelled “Infraduction”), in which you will be building tooling and applications to be used across the company. This is your opportunity to learn our tech stack, explore the company, and learn how we get things done - all whilst working with other engineering teams from day one 

Helsing is an equal opportunities employer. We are committed to equal employment opportunity regardless of race, religion, sexual orientation, age, marital status, disability or gender identity. Please do not submit personal data revealing racial or ethnic origin, political opinions, religious or philosophical beliefs, trade union membership, data concerning your health, or data concerning your sexual orientation.

Role Summary and Impact 

As part of the Global Operations Centre (GOC), you will work closely with teams across the United States, Europe, and Asia to deliver high-impact solutions in a collaborative, multicultural environment. We are seeking a talented and passionate Frontend Engineer to join our Data & Technology Solutions team. You will be instrumental in crafting intuitive, engaging, and highly performant user interfaces for our data products and AI platforms, including the cutting-edge WPP Open platform. If you thrive on building beautiful and functional web applications, excel in modern JavaScript frameworks, and are eager to translate complex data into clear, user-friendly experiences within the dynamic AdTech space, we encourage you to apply. 

You are: 

• A craftsman of user experience, with a keen eye for detail and a commitment to building pixel-perfect, responsive, and accessible interfaces. 
• Proficient in modern frontend technologies, capable of writing clean, modular, and maintainable code. 
• Passionate about performance, always optimizing web applications for speed and efficiency. 
• A collaborative team player, eager to work closely with UX/UI designers, backend engineers, and product owners. 
• Continuously learning, staying abreast of the latest frontend trends, tools, and best practices. 

What You will do:

Design and Develop Engaging User Interfaces 

• Build, maintain, and evolve highly interactive and responsive web applications using modern JavaScript frameworks (e.g., React, Angular, Vue.js) and libraries. 
• Translate UI/UX design wireframes and mockups into high-quality code, ensuring technical feasibility and optimal user experience. 
• Develop reusable UI components and frontend libraries to maintain consistency and accelerate development across our product suite. 
• Contribute to the entire frontend development of lifecycle, from conceptualization and design input to deployment and maintenance. 

Integrate with Backend Services and Data 

• Integrate frontend applications with RESTful APIs, GraphQL endpoints, and other backend services to fetch and display dynamic data. 
• Implement data visualization components and dashboards to present complex analytical insights in an intuitive and actionable manner. 
• Collaborate closely with backend engineers to define API contracts and optimize data flow for frontend consumption. 
• Ensure the technical feasibility of UI/UX designs and provide constructive feedback on potential implementation challenges. 

Ensure Quality, Performance, and Accessibility 

• Write comprehensive unit, integration, and end-to-end tests to ensure the reliability and stability of frontend applications. 
• Optimize web applications for maximum speed and scalability, addressing performance bottlenecks and ensuring a smooth user experience. 
• Implement web accessibility standards (e.g., WCAG) to ensure our products are usable by the widest possible audience. 
• Participate in code reviews, providing constructive feedback and ensuring adherence to coding standards and best practices. 

Collaborate and Innovate 

• Work effectively within an Agile team, participating in sprint planning, stand-ups, reviews, and retrospectives. 
• Contribute to technical discussions, architectural decisions, and provide expertise on frontend best practices. 
• Mentor junior developers and share knowledge across the team to foster a culture of continuous learning and improvement. 
• Research and evaluate new frontend technologies and tools to enhance our development processes and product capabilities. 

Skills and Experience 

If this opportunity looks right for you, we are looking for candidates who have:  

• 3+ years of professional experience in frontend web development 
• Strong proficiency in HTML5, CSS3, and modern JavaScript 
• Extensive experience with at least one modern JavaScript framework, such as Angular, React.js. 
• English fluency B2/C1 
• Solid understanding of state management patterns and libraries  
• Experience with CSS preprocessors  
• Familiarity with module bundlers  
• Proficiency in writing automated tests for frontend applications (e.g., Jest, React Testing Library, Cypress, Playwright). 
• Experience consuming RESTful APIs. Familiarity with GraphQL is a plus. 
• Bachelor's degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience. 
• Experience with data visualization libraries (e.g., D3.js, Chart.js, Plotly) is highly desirable.

Life at WPP Media & Benefits 

Our passion for shaping the next era of media includes investing in our employees to help them do their best work, and we’re just as committed to employee growth as we are to responsible media investment. WPP Media employees can tap into the global WPP Media & WPP networks to pursue their passions, grow their networks, and learn at the cutting edge of marketing and advertising. We have a variety of employee resource groups and host frequent in-office events showcasing team wins, sharing thought leadership, and celebrating holidays and milestone events. Our benefits include access to internal learning platforms, certifications, and training sessions, life insurance, medical care & sports card in Medicover, funding for English language learning, employee mental health awareness day, and more.  

WPP Media is an equal opportunity employer and considers applicants for all positions without discrimination or regard to particular characteristics. We are committed to fostering a culture of respect in which everyone feels they belong and has the same opportunities to progress in their careers. We are committed to offering equal opportunities to all employees, which is why we only establish collaborations based on employment contracts. 

We believe the best work happens when we're together, fostering creativity, collaboration, and connection. That's why we’ve adopted a hybrid approach, with teams in the office two days a week. If you require accommodations or flexibility, please discuss this with the hiring team during the interview process. 

Following a detailed review of all applications, we will contact those candidates whose qualifications and stated terms of cooperation most closely align the objectives of our recruitment process.

The controller of your personal data is the WPP Media Poland sp. z o.o.The personal data you provide will be processed for the purpose of the recruitment process.  By providing us with personal data beyond the scope required by the Labour Code, you consent to the processing of such data for the purposes of the recruitment process.  Consent may be withdrawn at any time. Withdrawal of consent does not affect the lawfulness of the processing carried out prior to its withdrawal. For evidence purposes, please withdraw your consent in writing or by email to RODO@wppmedia.com. 

❗️Please note that this role is office based for Valencia, Spain (RAS Valencia - Servicios Profesionales de Recursos Humanos).

❗️If you need to be relocated, we take care of the process.

We are developing an innovative platform for intelligent gameplay analysis and complex in-game scenario automation. Our team builds internal tooling that bridges the gap between Computer Vision, text analysis, and modern LLM architectures to achieve deep, real-time understanding of game mechanics.

Key Responsibilities:

• Core Development: Designing and maintaining an in-house AI-powered service for intelligent automation.
• Computer Vision: Training and calibrating Object Detection and Classification models (CNNs, DETR) on unique proprietary datasets.
• Intelligent Analysis: Integrating OCR solutions and LLMs to interpret data and structure information from dynamic content.
• MLOps: Building pipelines for model retraining based on "low-confidence" predictions (Active Learning).
• Infrastructure: Containerizing solutions and ensuring their scalability and performance.

Our Tech Stack & Requirements:

• Experience: 4+ years in software development (Backend / Full Stack / SDET).
• AI/ML Background: Proven hands-on experience with Detection Transformers (DETR) or modern CNN architectures.
• LLM & Agents: Understanding of AI Agent principles; experience building tools and integrations with LLMs (LangChain, Indexing, Tool-use).
• Python: Strong proficiency in Python and experience in AI tool development.
• Engineering Excellence: Deep understanding of TDD, clean architecture principles, and database management (PostgreSQL/MySQL).
• Networking: Experience designing APIs (REST, GraphQL, WebSockets).
• English: Upper-Intermediate (technical documentation, professional communication).

Nice to Have:

• Experience with Kubernetes and Docker.
• Understanding of microservices architecture.
• Experience setting up CI/CD pipelines (GitLab CI, GitHub Actions).

Location: Poland

We Are:

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel.

We are looking for a Backend Python Developer to join our internal team at RTB House. You will work on applications and tools that directly support our real-time bidding business, collaborating with experienced engineers and product teams. This position is ideal for developers who want to grow their skills, solve real-world problems, and build reliable software that makes a visible difference.

You Will:

• Design, develop, and maintain internal web applications responsible for ad campaigns management, e.g. configuration, monitoring, automation
• Implement jobs and processes to integrate internal services
• Contribute to the development of internal Python libraries and shared frameworks
• Write and maintain unit/integration tests to ensure code quality and reliability
• Identify issues and propose improvements to enhance performance, scalability, and stability
• Collaborate with cross-functional teams to deliver new features and improve existing workflows
• Apply best practices in application design, databases, and APIs

Desired Experience:

• Solid experience in backend development with Python
• Familiarity with relational databases and ability to write efficient SQL queries (PostgreSQL, BigQuery is a plus)
• Understanding of RESTful and GraphQL APIs conventions and best practices
• Experience in asynchronous programming
• Good understanding of system design concepts (e.g. scalability, caching, reliability) and willingness to learn more
• Experience with writing and maintaining tests
• Problem-solving skills and the ability to work methodically through technical challenges
• Good communication skills and ability to work in a team
• Fluency in English

Selected Technologies:

• Backend: Python, FastAPI
• Databases: PostgreSQL, BigQuery
• GraphQL: Ariadne
• Messaging: Google Pub/Sub
• Data Handling & Validation: Pydantic, dataclasses
• Testing: Pytest
• Monitoring: Sentry, Prometheus, Grafana
• CI/CD: GitHub Actions
• Cloud: GCP, Kubernetes

We Offer:

• Being part of a small team with a high degree of autonomy and decision-making 
• Access to the latest technology in the developed solution
• Opportunity to build and improve our own products, where long-term quality and reliability truly matter
• Participation in one of the most interesting projects of the online industry in Poland and one of the fastest growing technology companies in Europe
• Collaboration with flexible contract options (B2B or contract of mandate)

Apply now! 

You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.

At JetBrains, code is our passion. Ever since we started, back in 2000, we have been striving to make the strongest, most effective developer tools on earth. By automating routine checks and corrections, our tools speed up production, freeing developers to grow, discover, and create.

The Version Control Experience team is part of the IntelliJ Platform department. We focus on improving the version control workflows across all JetBrains IDEs. From the moment a user clones a project to exploring its branches and reviewing changes, our mission is to make working with Git and other VCS tools feel smooth, fast, and reliable. Our work spans multiple IDEs and directly impacts millions of users.

We’re looking for a Kotlin or Java developer to help us improve the VCS experience across JetBrains IDEs.

In this role, you’ll: 

• Improve core workflows such as cloning projects, switching branches, resolving conflicts, and viewing history.
• Develop and maintain VCS integration components used across multiple IDEs.
• Enhance integrations with GitHub and GitLab, making them more seamless and feature-rich.
• Contribute to architecture and performance improvements within the VCS subsystem.
• Work closely with UX designers and other product teams to polish and improve the VCS experience.
• Have an opportunity to work on features used by millions of developers every day, including your teammates and colleagues
• Have freedom of ideas - you are always encouraged to suggest and implement new features and improvements to existing workflows

We’d be happy to bring you on board if you: 

• Have strong development experience with Kotlin or Java.
• Are familiar with Kotlin coroutines and asynchronous programming.
• Are familiar with web-based APIs (REST, GraphQL).
• Are comfortable working with legacy code and gradually improving it.
• Are interested in developer tools and care about their usability.
• Are open to working with UI (Swing), or already have experience doing so.
• Strive to write clean, efficient, and maintainable code.
• Enjoy exploring how things work under the hood and aren’t afraid of technical complexity.

We would be especially thrilled if you: 

• Are a power user of Git. If you’re comfortable with rebase workflows, cherry-pick, resolving complex merge conflicts, and working with staging areas interactively, you’ll feel right at home.
• Understand Git internals such as the index, reflog, low-level merge strategies, or how Git represents history.
• Have experience with IntelliJ plugins or developer tools.
• Are familiar with UI/UX best practices.
• Experience with mobile development in Android

About the Team: 

We’re a relatively small, distributed team based in Munich, Amsterdam, Berlin, and Belgrade. We keep meetings minimal and collaboration focused and informal. We value empathy, clarity, and initiative – and we’re looking forward to welcoming a new teammate.

Why join JetBrains?

• Strong base salary. We offer competitive pay that reflects your skills and experience.
• Flexible work location. Enjoy the freedom to work from home or from the office.
• Remote work. Spend up to 30 days per year working remotely from abroad.
• Extra time off. More days to relax, recharge, and do the things you love.
• Medical insurance allowance. Enjoy peace of mind for you and your family.
• Learning and development opportunities. Access to conferences, courses, and language classes.
• Language classes. Pick up the local language or sharpen your English skills.
• Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
• Mental health support. To help you feel your best, we provide easy access to professional mental health services.
• Sports benefit. Enjoy an on-site gym or sports club stipend.
• Internal events. Join company-wide celebrations and team gatherings.

*Some benefits may vary depending on location.

❗️Please note that this role is office-based for Poland, Warsaw.

❗️If you need to be relocated, we take care of the process.

We are looking for a skilled Senior Node.js Developer to join our team in our Warsaw office.

✅ We offer excellent benefits, including but not limited to:

🚀 Career growth opportunities in an international and dynamic environment;
📚 Opportunity to develop language skills with partial compensation for language courses;
🎁 Special gifts for birthdays, weddings, and newborns;
🏝️ 20 working days of paid annual vacation, plus paid sick leave;
🍲 Office snacks and refreshments;
🏋️‍♂️ Sports package to support a healthy lifestyle;
🩺 Comprehensive medical insurance for you and your partner;
📍 Comfortable office with great facilities in a prime location;
 🎉 Exciting corporate events, team-building activities, and international company parties.

✅ Main requirements:

✔️3–5+ years of experience in test automation within product or platform teams;

✔️Strong hands-on experience with TypeScript / JavaScript;

✔️Experience writing end-to-end tests alongside application code (near-code / monorepo approach);

✔️Proven experience working in cross-functional teams with close collaboration with Backend, Frontend, and DevOps engineers;

✔️Practical experience with modern E2E testing frameworks (Playwright or equivalent)

✔️Strong understanding of testing principles and strategies, including the test pyramid, shift-left approach, and contract testing;

✔️Experience with REST API testing, data validation, and system-level testing;

✔️Ability to design and implement mocks, stubs, and other test doubles to ensure stable and isolated tests;

✔️Solid understanding of object-oriented and/or functional programming concepts as applied to test code and frameworks;

✔️Experience working with CI/CD pipelines (GitLab CI, Jenkins, GitHub Actions, or similar);

✔️Familiarity with test observability and reporting tools (e.g., Allure, TestOps, CI-based reporting);

✔️Strong communication skills with the ability to actively participate in technical discussions and challenge requirements constructively;

✔️English proficiency at an Intermediate level or higher, both written and spoken.

✅ Nice to have:

✔️Experience writing and maintaining integration tests (service-to-service, contract-based testing);

✔️Experience contributing to the design and evolution of test automation frameworks;

✔️Practical knowledge of Docker and test environment configuration;

✔️Experience testing GraphQL APIs;

✔️Experience with distributed systems or high-load platforms;

✔️Experience in non-functional testing, including performance, reliability, and resilience testing.

✅ Responsibilities:

✔️ Design, implement, and maintain end-to-end automated tests in TypeScript, developed and maintained alongside the application code;

✔️Collaborate closely with developers throughout the feature lifecycle, including design, implementation, and defect resolution;

✔️Participate in defining test strategies at both feature and system levels;

✔️Contribute to the development and continuous improvement of the automation testing framework;

✔️Make informed decisions on the appropriate use of mocks, stubs, or real integrations depending on testing goals;

✔️Ensure automated tests are reliable, maintainable, and suitable for execution in CI/CD pipelines;

✔️Participate in code reviews for test code and, when appropriate, application code;

✔️Provide fast, clear, and actionable feedback on quality and defects to the development team;

✔️Promote a built-in quality mindset and continuous improvement of testing practices across the team.

✅ We offer excellent benefits, including but not limited to:

🧑🏻 💻 Learning and development opportunities and interesting challenging tasks;

📝 Official employment following the laws of Poland/EU, registration of family members;

✈️ Relocation package (tickets, staying in a hotel for 2 weeks);

📚 Opportunity to develop language skills and partial compensation for the cost of language classes;

🎁 Birthday celebration present;

🏝 Time for proper rest and 24 working days of Annual Vacation.