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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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