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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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