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November 3, 2026

Junior Full-Stack Product Engineer

Junior • On-site

96,000 - 132,000 PLN/yr

Kraków, MA, Poland

Quick Facts

  • Role: Junior Full-Stack Product Engineer (PHP + TypeScript)

Description

You will build and ship product features end-to-end, from understanding the problem through implementation, deployment, and verification in production. Work full-stack with PHP on the backend and React + TypeScript on the frontend, while maintaining quality with real code reviews and tests. You’ll also diagnose and fix production bugs reported by customers.

Responsibilities

  • Implement backend and frontend functionality, including data models and APIs up to the client-facing interface

  • Ensure quality via unit and functional tests and participate in code review

  • Maintain the product by investigating root causes of customer-reported issues

  • Collaborate with design and the team by asking for context and proposing alternatives

  • Use AI-assisted coding tools (e.g., Claude Code) and be able to explain your changes

Requirements

  • PHP 8+ with understanding of object-oriented programming

  • JavaScript knowledge; TypeScript and basic React experience

  • SQL with relational databases (MySQL)

  • Ability to write unit tests using PHPUnit

  • Git knowledge for day-to-day collaboration (branches, PRs, conflict resolution)

  • Ability to use agent-based AI coding tools (e.g., Claude Code) and explain the code produced

  • Strong problem understanding mindset and willingness to ask questions

  • Ability to learn quickly and work independently while requesting help when needed

  • Proof of capability via a real project, internship, practices, open source contribution, or something similarly working

Benefits

  • Production work from the first weeks (not long “warm-up” tasks)

  • Code review that actually teaches

  • Quality equipment for work

  • Paid AI tool licenses

  • Ticket refund benefits for purchases from customers

  • Integrations, trips, and outings

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