Eastern Peak

We are looking for a Senior Full-Stack Engineer with a strong backend core to join the team behind a flagship visual AI testing platform, built by a global leader in AI-powered test automation and used by engineering teams at some of the world’s largest companies.

This role involves designing, building, and operating backend services in C# / .NET for a large-scale, multi-tenant system running in the cloud, with hands-on work across Kubernetes, cloud networking, databases, and Redis. You’ll own features end to end, contribute to the frontend where needed, and collaborate daily with the client’s engineering group in Israel as an integrated member of a hybrid team.

About the product:
The team develops the company’s flagship product: a visual AI testing platform that helps engineering teams ship high-quality applications on any browser or device. Instead of relying on fragile, hand-written assertions, the platform uses Visual AI that works like a human eye: it compares new screenshots against a baseline and automatically detects meaningful visual and functional regressions, while ignoring dynamic content such as ads, dates, or transaction IDs.

What you’ll do:
- Design, build, and operate backend services in C# / .NET that power the platform at scale.
- Contribute to backend architecture: service design, data access, performance, and scalability.
- Work hands-on with cloud infrastructure, including Kubernetes, VMs, cloud networking, databases, and Redis.
- Own features end to end, from design through deployment and production, and contribute to the frontend where needed.
- Use AI-assisted development tools to speed up development, debugging, and code reviews.
- Collaborate closely with the team through design discussions, code reviews, and shared ownership of delivery.

Requirements:
- 5+ years of hands-on industry experience as a software engineer in a product environment. 
- 5+ years of experience with .NET (C#).
- 3+ years of experience building large-scale backend systems, with a solid grasp of backend architectures and design patterns.
- 1+ years of experience in a full-stack or frontend role, or with frontend technologies.
- Hands-on experience with cloud infrastructure: Kubernetes, VMs, cloud networking, databases, Redis, or similar.
- Proven experience working in hybrid or extended teams, collaborating day to day with engineers in another country.
- Hands-on experience using AI-assisted development tools in your daily workflow to accelerate development.
- Excellent written and spoken English, with clear, confident verbal communication.
- A true team player who communicates openly and takes shared ownership of results.
- Based in Warsaw and able to work from the office 3 days per week.

Nice to have:
- DevOps experience (CI/CD, infrastructure as code, monitoring).
Hands-on experience with AI-assisted development tools.

What we offer:
- A friendly environment where you can reach your full potential and grow your career.
- A long-term, full-time B2B contract with a Polish company.
- Paid vacation days, paid sick leave, and paid days off on all Polish public holidays.
- Hybrid work in Warsaw: 3 days per week in the office, the rest of the time remotely.

Project details

We are looking for a Senior Software Engineer to join the SDK team of a global leader in AI-powered test automation, whose visual AI testing platform is trusted by enterprises and startups worldwide, including many of the world’s largest companies.

This role involves building and owning the SDKs that bring visual and functional testing into customers’ existing test suites, with a strong focus on JavaScript/TypeScript, browser internals, and the Chrome DevTools Protocol. The SDKs integrate with the frameworks developers already use, including Playwright, Cypress, Selenium, WebdriverIO, Puppeteer, Appium, and Storybook. You’ll help design and maintain a clean, stable public API that thousands of CI pipelines depend on every day, working closely with the engineering group as an integrated member of a hybrid team.

About the project:
Think of the SDK as a “programmatic frontend” for the platform: not a UI, but a public API used at massive scale. JavaScript/TypeScript is the core development environment, with SDKs also available for Java, Python, .NET, and Ruby.
The team relies on a minimal set of third-party libraries and builds most of the core functionality in-house.

Key responsibilities

• Contribute to the architecture and implementation of the SDKs.
• Own the full development lifecycle of advanced JavaScript libraries that integrate with test frameworks, user applications, and server APIs.
• Design APIs and communication protocols with a focus on performance and asynchronous flows.
• Integrate with leading test automation frameworks such as Playwright, Cypress, Puppeteer, WebdriverIO, Selenium, Mocha, and Jest.
• Build tooling that leverages browser internals and the Chrome DevTools Protocol (CDP).
• Use Claude and agentic workflows as part of your everyday development process to speed up development, testing, and debugging.
• Investigate and resolve complex issues that surface only in customers’ environments.
• Take on independent research tasks, from evaluating browser automation approaches to improving performance on mobile platforms.
• Collaborate with engineering, product, and QA to ensure technical quality and smooth delivery.

Requirements

• 5+ years of hands-on industry experience developing and maintaining production-grade software in a product environment.
• Strong proficiency in JavaScript and TypeScript.
• Experience with Node.js and NPM tooling.
• Familiarity with test automation frameworks or the Chrome DevTools Protocol.
• Hands-on experience using AI-assisted development tools in your daily workflow to accelerate development.
• Proven experience working in hybrid or extended teams, collaborating day to day with engineers in another country.
• Excellent written and spoken English, with clear, confident verbal communication.
• A true team player who communicates openly and takes shared ownership of results.
• Based in Warsaw and able to work from the office 3 days per week.

Will be a plus:

• Understanding of browser architecture (DOM, rendering, caching).
• Experience with MCP, LLM agents, or tool-calling integrations.
• Contributions to open-source projects and developer communities.
  What we offer:
• - A friendly environment where you can reach your full potential and grow your career.
• - A long-term, full-time B2B contract with a Polish company.
• - Paid vacation days, paid sick leave, and paid days off on all Polish public holidays.
• - Hybrid work in Warsaw: 3 days per week in the office, the rest of the time remotely.

About Eastern Peak

We are a technology provider of custom hardware and software development solutions and digital transformation consulting services.

We help our clients adapt and evolve in the face of disruptive new technologies, dynamic global markets and rapidly changing regulatory environments. We do it by modernizing their legacy systems, automating business processes and creating the technological foundation to withstand and embrace continuous change.

We develop and deploy unique data analytics capabilities across their infrastructure and introduce competitive advantages by utilizing the advances in technology such as IoT, AI, Cloud, Big Data, AR/VR and others.

Project details

We are looking for a Senior Full-Stack Engineer to join the team behind an AI-powered autonomous testing platform, built by a global leader in AI-powered test automation whose products are trusted by enterprises and startups worldwide, including many of the world’s largest companies.

This role involves end-to-end feature development across a TypeScript stack, from the Node.js backend to the React frontend, with an AI-first approach at every step of the development workflow. You’ll own features from technical design to production, work closely with Product and Design, and collaborate daily with the client’s engineering group as an integrated member of a hybrid team.

About the product.
The team builds an AI-powered platform that lets teams create, run, and maintain end-to-end tests with minimal manual effort. Instead of writing test code, users simply provide a URL: the platform crawls the application, automatically generates visual and functional tests, and organizes the results in a centralized dashboard.

Key responsibilities

• Design, build, and ship product features end to end across the TypeScript stack (Node.js and React).
• Own features from technical design through development, testing, release, and production monitoring.
• Think like a product owner: dig into the “why” behind features, balance user needs with technical tradeoffs, and take real ownership of the product experience.
• Work closely with Product, Design, and your teammates in Israel to turn requirements into clean, well-architected solutions.
• Contribute to architecture discussions, code reviews, and engineering best practices.
• Use Claude and agentic workflows as part of your everyday development process to move faster, and help build shared AI automations for the team.

Requirements

• 5+ years of hands-on software engineering experience in SaaS or product-driven companies, delivering features as a full-stack engineer on cross-functional product teams.
• 3+ years of production experience across the full stack with TypeScript, Node.js, and React.
• Hands-on experience using AI-assisted development tools in your daily workflow to accelerate development.
• Exceptional collaboration and communication skills, with a track record of partnering closely with product managers, designers, and fellow engineers.
• Proven success working in distributed or hybrid teams, collaborating daily across time zones (ideally with international engineering groups).
• Fluent written and spoken English, with the ability to explain complex technical ideas and tradeoffs clearly and confidently.
• A strong sense of ownership, self-direction, and an open, egoless communication style.
• Based in Warsaw and able to work from the office 3 days per week.

Will be a plus:

• Familiarity with test automation tools and frameworks (Playwright, Cypress, Selenium).
  What we offer:
• - A friendly environment where you can reach your full potential and grow your career.
• - A long-term, full-time B2B contract with a Polish company.
• - Paid vacation days, paid sick leave, and paid days off on all Polish public holidays.
• - Hybrid work in Warsaw: 3 days per week in the office, the rest of the time remotely.

About Eastern Peak

We are a technology provider of custom hardware and software development solutions and digital transformation consulting services.

We help our clients adapt and evolve in the face of disruptive new technologies, dynamic global markets and rapidly changing regulatory environments. We do it by modernizing their legacy systems, automating business processes and creating the technological foundation to withstand and embrace continuous change.

We develop and deploy unique data analytics capabilities across their infrastructure and introduce competitive advantages by utilizing the advances in technology such as IoT, AI, Cloud, Big Data, AR/VR and others.