Backend QA Engineer

About the role

Air Apps, a family-founded company building an AI-powered Personal & Entrepreneurial Resource Planner, is looking for a Backend QA Engineer to ensure the reliability, performance and scalability of its backend systems. The role focuses on testing APIs, databases and backend services while working closely with engineers. It is a fully onsite position in Lisbon, with relocation support offered.

Key responsibilities

• Design and run tests for backend systems, including APIs, databases and service integrations.
• Validate API functionality and performance with tools such as Postman or Swagger.
• Test database operations, queries and data integrity in PostgreSQL or similar relational databases.
• Review pull requests with engineering teams to check code quality and test coverage.
• Help develop and maintain automated tests for backend services.
• Review backend infrastructure and flag reliability or performance issues.
• Document defects, test cases and results in tools such as TestRail.
• Work with developers and product teams to improve testing strategies.

Required profile

• About 2-3 years of experience with backend technologies, testing or software development in test roles.
• Experience with Node.js and TypeScript in backend environments.
• Familiarity with SQL databases, especially PostgreSQL, and experience validating queries and data integrity.
• Experience testing REST APIs with Postman, Swagger or similar tools.
• Understanding of API, database and integration testing, and comfort reviewing pull requests and backend architecture.
• Strong attention to detail, problem-solving skills and collaboration with cross-functional teams.

What we offer

• Annual bonus.
• Health and life insurance.
• Transportation budget and a Coverflex benefits package (meal allowances, well-being).
• Urban sports club membership and meals free at the office.
• Pension fund and annual conference.
• Apple hardware ecosystem for work.