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October 1, 2026

Senior Backend Software Engineer

Senior • On-site

Kraków, Poland

Quick Facts

  • Role: Senior Backend Software Engineer

Description

Build and improve backend services, APIs, and integrations in an agile environment with a strong focus on quality and performance. Analyze new features, designs, and releases; strengthen test automation and testing practices; and work with databases and data securely. Collaborate to reproduce and prioritize bugs, and support junior team members with effective testing strategies.

Responsibilities

  • Analyze software for new features, designs, and releases, including test automation

  • Own app and software testing and recommend testing improvements

  • Develop APIs and integrations that are secure, well-tested, and highly performant

  • Continuously improve code, systems, practices, and knowledge

  • Work with databases and data to store and process information securely and effectively

  • Evaluate and implement new custom UI approaches for efficiency and performance

  • Liaise with users to prioritize and reproduce inbound bug reports

  • Identify effective testing strategies and provide continuous support to junior staff

Requirements

  • Bachelor’s and/or Master’s degree

  • 4+ years Java software development

  • 4+ years using Spring Boot

  • 4+ years integrating with external services

  • Ability to grasp technical concepts quickly

  • Detail-oriented and committed to quality

  • Positive, collaborative attitude toward testing

  • Experience with AWS or other cloud providers

Benefits

  • Competitive salary

  • PPK Program

  • 50% tax-deductible expenses (KUP)

  • Share Options programme

  • Private health and insurance (Luxmed)

  • Allianz Travel Insurance

  • Room for career development and progression

  • Occasional game nights and social/team events

  • Fully stocked kitchen with beverages and snacks

  • Branded merchandise

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