Software Engineer in Test

This is an embedded role. You join a product-engineering team and own quality strategy with them, not for them. You report to the team's Engineering Manager and join a community of Engineers in Test—peers who share tooling, patterns and practice across the engineering organisation. The whole team owns quality. Your job is to support the team and build shared tooling that the whole team can use, not to be the sole gatekeeper for releases.

Location: Kraków, Gdańsk or Warsaw
Working type: Hybrid

Salary

• Full-time employee: 15,000–19,000 PLN gross/month
• Contractor (specific projects): 16,000–23,000 PLN net + VAT on a B2B contract

Quick Facts

• Daily production deployments
• Modern technology stack across backend, frontend, infrastructure, monitoring and testing
• Opportunity to build high-leverage features and tooling for core business domains that impact the travel experience for millions of users

What you'll drive

• Design, develop and maintain scalable, robust automated test suites across unit, integration, API, end-to-end, regression and performance layers.
• Build and evolve internal test automation frameworks, libraries and shared utilities that improve coverage, speed and reliability for the engineering organisation.
• Integrate automated tests into CI/CD pipelines on GitHub Actions to enable fast, reliable feedback loops and frequent production deployments.
• Introduce and grow contract testing between services to make cross-service refactors safer.
• Turn production observability from Sentry, Grafana and ELK into a quality signal, closing the loop between live system behaviour and test coverage.
• Collaborate with the security team on testing sensitive and regulated flows.
• Develop and execute performance, load and stress tests with k6 to validate system behaviour under expected and peak conditions and identify bottlenecks before production.
• Collaborate with developers and the product manager to define test strategies for new features and services, identify risk areas and recommend appropriate test approaches.
• Analyse test failures and production incidents to identify root causes, improve coverage in gap areas and implement long-term preventive measures to reduce regression risk.
• Apply AI-assisted tooling to test generation, exploratory testing and test data, using existing tools and experimenting with new ones.

Technology stack

• Backend: Ruby/Rails, Golang, Python
• Frontend: React, JavaScript, TypeScript
• Databases: PostgreSQL
• Infrastructure: AWS, Docker, Kubernetes
• Monitoring: ELK/Grafana, Sentry, GitHub Actions CI/CD
• Testing: Bruno (API), Playwright (E2E), k6 (performance)

What sets you apart

• 3+ years of professional experience as a Developer in Test, Engineer in Test or SDET at mid or senior level.
• Strong coding skills in at least one major programming language; Ruby/Rails, JavaScript and TypeScript are preferred but not mandatory.
• Ability to write clean, maintainable and well-documented code.
• Hands-on experience with test automation frameworks and tools such as Playwright, Cypress, Selenium or similar; Playwright is preferred.
• Experience testing RESTful APIs using Bruno, Postman or similar tools.
• Experience with contract testing between services using Pact or similar.
• Working knowledge of GitHub Actions and integrating automated test suites into build pipelines.
• Experience using AI-assisted tools in testing workflows, or genuine eagerness to learn and experiment with them.
• Strong analytical and troubleshooting skills, including diagnosing flaky tests, race conditions and complex integration issues.
• Proficiency with Git and collaborative development workflows.
• Ownership of delivered solutions: ship, monitor and fix them.
• Clear, effective communication and cross-functional collaboration in an agile environment.
• Strong written and spoken English.

Benefits

• Fast impact through daily deployments to production.
• High autonomy and trust.
• Learning days, personal development plans, workshops, mentorship and language classes.
• Private healthcare, wellness budget, travel stipend, gym/transport subsidy and free access to travel-protection services.