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October 8, 2026

Lead Software Engineer

Senior • On-site

Kraków, Poland

Quick Facts

  • Role: Lead Software Engineer (backend-focused)

Description

You will lead engineering efforts to build and extend a high-performance payment product. The role includes implementing backend improvements, designing secure, well-tested APIs and integrations, ensuring system quality through monitoring and testing, and guiding teams with engineering best practices in an agile environment.

Responsibilities

  • Write high-quality, hyper-performant, well-structured code to support and extend the existing product
  • Break down complex product features and backend improvements into detailed, deliverable technical tasks
  • Advise and guide teams on engineering best practices, solution design, and problem solving
  • Own system quality, monitoring, and unit/integration testing; improve testing strategy
  • Work in an agile environment delivering user stories with significant customer impact
  • Build rock-solid, secure, well-tested, highly performant integrations and APIs
  • Continuously improve code, systems, processes, and knowledge
  • Work with databases and handle data securely and efficiently
  • Triage inbound bug reports, reproduce issues, and identify solutions
  • Provide technical leadership and continuous support to junior engineers

Requirements

  • 7+ years of Java software development experience (preferred)
  • Spring Boot experience
  • Experience building microservices and robust interfaces
  • SQL database experience (MySQL or SQL Server)
  • Experience integrating with external services
  • Bachelor’s and/or Master’s degree in a technical field
  • Team/technical leadership experience
  • Highly skilled cloud architecture (AWS) and related tooling
  • Experience with cloud infrastructure, Terraform (Infra as Code), and CI/CD
  • Detail-oriented and committed to quality
  • Positive, collaborative attitude and strong development/testing mindset

Benefits

  • Competitive salary
  • Stock options (NSO)
  • Pension plan and life cover
  • Private health and insurance
  • Career development and progression opportunities
  • Social events and occasional game nights
  • Fully stocked kitchen with beverages and snacks
  • Branded merchandise

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