Backend QA Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend QA Engineer based in Germany.

• Analyze business requirements, functional specifications, and user stories to design comprehensive test cases, scenarios, and coverage strategies.
• Perform end-to-end testing of transaction lifecycles, including initiation, authorization, settlement, reconciliation, and related workflows.
• Proactively explore the platform to identify edge cases, unexpected behavior, risks, and gaps not covered by existing specifications.
• Validate data accuracy, integrity, and consistency across services using SQL queries against PostgreSQL and MySQL.
• Test REST and gRPC APIs using tools such as Postman, grpcurl, or equivalent solutions, validating requests, responses, error handling, and edge cases.
• Verify event-driven workflows across message brokers such as Kafka, RabbitMQ, and NATS, including retries, failures, ordering, and duplicate-message handling.
• Write, maintain, and extend automated regression tests in Go, collaborating with developers when additional test coverage or technical support is required.
• Log, prioritize, track, and manage defects in Jira, providing clear reproduction steps, payloads, logs, and relevant technical context.
• Execute regression testing following deployments and help ensure releases meet expected quality standards.
• Contribute to improving QA processes, automation coverage, and overall testing efficiency across the platform.

• 4+ years of professional manual testing experience, with a strong focus on backend services, APIs, and distributed systems.
• Previous experience testing products in iGaming, fintech, payment gateways, banking, or another transaction-intensive domain.
• Strong proficiency in writing intermediate SQL queries for validating and investigating data in relational databases.
• Hands-on experience with API testing tools, particularly Postman, as well as test management platforms such as TestRail or Zephyr.
• Ability to read Go code and write or extend automated tests in Go; previous automation experience in another programming language is acceptable if you are willing to work with Go.
• Working knowledge of Docker and the ability to run and test services locally.
• Solid understanding of Agile/Scrum methodologies and the Software Testing Life Cycle (STLC).
• Strong analytical and problem-solving abilities, combined with meticulous attention to detail.
• Experience with microservices architectures and backend systems is highly valuable.
• Familiarity with CI/CD pipelines, Kubernetes, or observability and monitoring tools is a plus.
• Experience supporting User Acceptance Testing (UAT) with business stakeholders is an advantage.
• Existing professional experience with Go and/or Playwright is considered a plus.
• Strong communication and collaboration skills, with the ability to work effectively with engineering and business teams in a fully remote environment.

• Fully remote work with a globally distributed team.
• Full-time opportunity within a fast-growing technology environment.
• The opportunity to help build and scale a B2B platform from the ground up within a newly established technology ecosystem.
• Collaboration with teammates and technical professionals from around the world.
• Up to 28 unavailable days per year, in addition to public holidays.
• Significant ownership and the opportunity to shape quality practices across a high-traffic platform.
• Exposure to modern backend technologies, distributed systems, APIs, event-driven architectures, and automated testing.
• An environment where engineering quality, initiative, and proactive problem-solving are highly valued.