Senior Full-Stack Engineer

WhyHireWrong? Warsaw Cracow Lodz Wroclaw 2026-11-04
  • Fluent Polish and residence in Poland.
  • 5+ years of professional software engineering experience, mostly in product or SaaS companies, not only agencies or consulting.
  • Strong TypeScript and Node.js in production, with features used by real customers.
  • Production experience with React.
  • Experience taking at least one customer-facing feature from requirements to release.
  • Comfortable working from Figma designs.
  • Able to work independently in an early-stage team without detailed specs.

Nice to have

  • Next.js, or Vue and Nuxt.
  • Fastify, Express or NestJS.
  • Payments or subscriptions: recurring billing, payment providers, invoicing, proration, dunning.
  • E-commerce: Shopify, WooCommerce, Magento or headless commerce.
  • Public APIs, SDKs, webhooks or developer documentation.
  • Startup experience, especially in teams under 200 people.
  • Hands-on use of AI and LLM tools (Cursor, Copilot, Claude, OpenAI).

This recruitment process is conducted on behalf of our client.

    Own and ship full-stack features for a subscription platform used by e-commerce businesses. You'll work in a small team in Poland, close to product and the founders.


    About the role
    A seed-stage B2B SaaS company is building subscription infrastructure for e-commerce: billing, checkout and developer tools. They need a full-stack engineer who owns features from idea to release. You'll work across frontend and backend, talk to designers and founders directly, and help shape the architecture as the product grows.

    ,[Build and ship full-stack features in TypeScript, with React on the frontend and Node.js on the backend., Own features end to end: clarify requirements, propose an approach, build, test, release and check the impact., Build merchant-facing subscription, billing and checkout flows that are clear and reliable., Improve the developer-facing side of the product: APIs, docs, integrations, onboarding and error messages., Turn Figma designs into clean, accessible UI and suggest practical UX improvements., Keep the architecture simple, observable and maintainable. No over-engineering., Do code reviews, write automated tests and keep documentation useful., Use AI coding tools where they save time or improve quality.] Requirements: TypeScript, React, Node.js, SaaS, Figma, Next.js, Vue, Nuxt, Fastify, Express, NestJS, Shopify, WooCommerce, Magento, Cursor, Copilot, Claude, OpenAI
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