SDET (API Testing | Python) Engineer

🚀 SDET (API Testing | Python)📍 Hybrid | 1 day hybrid in Gdańsk or WarsawAre you passionate about quality engineering, test automation, and building robust testing frameworks? Do you enjoy breaking systems before users do? We're looking for a Senior SDET (Software Development Engineer in Test) with strong Python and API testing expertise to help ensure the quality, reliability, and security of mission-critical applications in the fintech and payments industry.This role combines software development, automation engineering, and quality assurance, with a strong focus on API testing, CI/CD integration, and modern AI-powered engineering practices.💡 Your Mission🧪 Test Automation &

• Quality EngineeringDesign, develop, and maintain scalable automated test frameworks using Python.Create and execute API test suites for RESTful and microservices-based applications.Develop end-to-end, integration, regression, and performance test scenarios.Improve test coverage, reliability, and execution efficiency across the platform.Collaborate with developers to implement shift-left testing practices.🔍 API TestingValidate APIs for functionality, performance, security, and reliability.Design comprehensive test cases based on business and technical requirements.Perform contract, integration, and end-to-end testing across distributed systems.Analyze API logs and troubleshoot complex issues.⚙️ CI/CD &
• AutomationIntegrate automated tests into Jenkins CI/CD pipelines.Support continuous testing strategies within Agile delivery teams.Improve automation processes to enable faster and safer releases.Monitor test execution and provide actionable quality metrics.🤖 AI-Powered Quality EngineeringLeverage AI tools such as GitHub Copilot, ChatGPT, Claude, and Cline to accelerate test development and improve productivity.Utilize AI-assisted approaches for test case generation, defect analysis, and documentation.Explore innovative AI-driven testing techniques and share best practices across the team.🔐 Security &
• Compliance TestingValidate application security controls and authentication mechanisms.Support testing activities related to compliance and regulatory requirements.Ensure high-quality standards for systems processing sensitive financial data.🤝 CollaborationWork closely with Developers, Product Managers, Business Analysts, and QA teams.Participate in Agile/Scrum ceremonies and planning sessions.Contribute to quality strategy, documentation, and process improvements.🎯 Must-Have SkillsAutomation &
• Programming✔️ 5 years of experience in software testing and test automation✔️ Strong hands-on experience with:PythonPyTestAPI automation frameworks✔️ Experience building and maintaining automated test frameworks from scratchAPI Testing✔️ Extensive experience testing:REST APIsMicroservicesDistributed systems✔️ Experience with:PostmanSwagger/OpenAPIAPI mocking toolsContract testingCI/CD &
• DevOps✔️ Experience with:JenkinsGitCI/CD pipelines✔️ Understanding of modern software delivery practicesDatabases✔️ Experience validating data using:PostgreSQLMySQLOracleSQL queriesQuality Engineering✔️ Strong understanding of:Test automation best practicesIntegration testingRegression testingPerformance testingDefect management⭐ Nice to HaveExperience with Selenium, Playwright, or CypressExperience with performance testing tools such as JMeter or GatlingExperience working in cloud environments (AWS, Azure, or GCP)Knowledge of Docker and KubernetesFamiliarity with security testing methodologiesOpen-source contributionsTechnical blogging or community involvement💳 FinTech &
• Payments Experience2 years of experience in fintech, payments, banking, or financial servicesUnderstanding of payment processing systems and transaction workflowsKnowledge of PCI DSS compliance requirementsFamiliarity with financial messaging standards and real-time payment systemsExperience testing highly regulated applications🎁 What You'll Get✨ Opportunity to work on innovative fintech and payment solutions✨ High-impact role shaping quality standards and automation strategy✨ Exposure to cutting-edge AI-powered engineering tools✨ Hybrid work model (Gdańsk or Warsaw)✨ Collaborative and supportive engineering culture✨ Career growth opportunities and continuous learning✨ Influence on testing frameworks, tooling, and engineering best practices🚀 Ready to elevate software quality through automation, innovation, and engineering excellence?Join us and help build reliable, secure, and scalable platforms that power the future of digital payments.