Senior Full-Stack Engineer (Node.js, React, AI-first), Hybrid: Warsaw, Poland

Eastern Peak; Województwo mazowieckie; Hybrid; PLN 250,000 - 400,000; Full time

Job summary

EASTERN PEAK in Warsaw seeks a Senior Full-Stack Engineer to lead feature development across Node.js backend and React frontend with an AI-first mindset. You will own features from design to production, collaborating with Product and Design, and working closely with the client’s engineering group in a hybrid team.

This role emphasizes strong TS/Node/React skills and ownership, plus experience with AI-assisted tools.

Qualifications

• 5+ years of hands-on software engineering experience in SaaS or product-driven companies.
• 3+ years of production experience across the full stack with TypeScript, Node.js, and React.
• Hands-on experience using AI-assisted development tools in daily workflow.
• Exceptional collaboration and communication skills with product, design, and engineers.
• Proven experience in distributed or hybrid teams across time zones.
• Fluent written and spoken English with clear communication.
• Based in Warsaw and able to work from the office 3 days per week.

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 and balance user needs with technical tradeoffs.
• Collaborate with Product, Design, and Israel-based teammates to translate requirements into solutions.
• Contribute to architecture discussions, code reviews, and engineering best practices.
• Use Claude and agentic workflows to move faster and build AI automations.

Skills

Full-stack development

TypeScript

Node.js

React

AI-assisted development

Distributed teams

English communication

Tools

Claude AI

Playwright

Cypress

Selenium

Job description

Senior Full-Stack Engineer (Node.js, React, AI-first), Hybrid: Warsaw, Poland

Date published: 26.10.2026

Location:

Warsaw

Position:

Full-Stack

Level:

Senior

Department:

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).

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.