Senior Fullstack Engineer

The role

We’re looking for a Senior Fullstack Engineer to join our team and work on challenging, modern web applications using TypeScript, React/Next.js, and Node.js. You’ll have a high level of ownership, influence technical decisions, and work directly with clients to turn complex requirements into production-ready solutions.

What you’ll do

• Build and own complex fullstack features using TypeScript, React/Next.js, and Node.js.
• Design and implement scalable frontend and backend solutions, including APIs, business logic, data models, and integrations.
• Build and integrate AI-powered features and LLM-based functionality into modern web applications.
• Work on complex web applications with rich interfaces, business workflows, and role-based functionality.
• Take ownership of technical solutions from requirements and architecture through implementation and delivery.
• Work directly with clients and internal stakeholders to understand problems, propose technical solutions, and communicate trade-offs.
• Contribute to architecture, code reviews, testing, and continuous improvement of the codebase.

What we’re looking for

• 5+ years of commercial experience as a Fullstack Engineer.
• Strong hands-on experience with TypeScript, React, and Node.js.
• Solid experience with Next.js and modern backend development (e.g. Express, NestJS).
• Good understanding of APIs, databases, application architecture, and complex business logic.
• Commercial experience building or integrating AI-powered features / LLM-based solutions.
• Ability to independently own complex technical problems and deliver production-ready solutions.
• Strong communication skills and confidence working directly with clients.
• Comfortable using AI-powered coding assistants (e.g. GitHub Copilot, Cursor, ChatGPT, Claude) as part of the daily development workflow.
• Comfortable working in a bilingual environment (Polish C1, English C1).

Nice to have

• Experience with Python/FastAPI.
• Experience with GraphQL, Go, PostgreSQL, or MongoDB.
• Experience with SaaS/B2B products and automated testing/CI/CD.

What we offer

• 22 000 - 28 000 PLN net + VAT monthly, B2B
• 100% remote setup and flexible hours
• Private medical care, life insurance, and Multisport
• Referral bonuses
• Equipment of your choice (MacBook by default)
• Interesting, challenging projects – we only take on the ones we believe in :-)