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September 20, 2026

Senior Full-Stack Engineer (Java/React)

Senior • On-site

Kraków, Pl-6, Poland

Quick Facts

  • Role: Senior Full-Stack Engineer (Java/React)

  • Focus: End-to-end development for server & network configuration/monitoring/optimization

  • Collaboration: International R&D teams

Description

You’ll build and evolve features end-to-end—from the database layer and backend logic to the user interface. The role covers backend services in Java and UI development in React, including shared component libraries and backend architecture improvements.

Responsibilities

  • Deliver end-to-end functionality (API, data model, and frontend)

  • Develop and maintain Java backend services and React user interfaces

  • Grow and maintain a shared UI component library and backend architecture

  • Participate in code reviews for both backend and frontend

  • Collaborate with international R&D teams

Requirements

  • Strong knowledge of Java 21

  • Experience with Spring Boot and Hibernate

  • Frontend experience with JavaScript, TypeScript, React, and Redux Toolkit

  • Strong knowledge of relational databases, especially MariaDB

  • Proficiency with Linux and Git

  • Ability to write testable, easy-to-maintain backend and frontend code

  • Experience with cloud-native solutions, especially Kubernetes

  • Experience using AI tools (LLMs, coding assistants) in day-to-day development

  • Advanced technical English

Benefits

  • Professional and personal development support and career growth planning

  • Training, certifications, and conference support (co-funded or fully covered)

  • #SmartChange to adapt the project based on preferences

  • Work-life balance initiatives: integration events, sports activities, and webinars

  • Physical activity support and training room rentals

  • Private healthcare package, sports card, insurance, and psychological support

  • Flexible benefits with points allocation

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