Backend QA Engineer, Madrid

The Role

We are looking for a Backend QA Engineer to help ensure the reliability, performance, and scalability of our backend systems. In this role, they will focus on testing APIs, databases, and backend services while collaborating closely with engineers to maintain high-quality standards across our infrastructure.

This is a fully onsite position, based at our office in Lisbon, where you will collaborate closely with cross-functional teams in person and contribute to a dynamic and fast-paced environment. We are open to support with relocation efforts.

The ideal candidate has approximately 2–3 years of experience working with backend technologies such as Node.js and TypeScript and enjoys combining software development practices with quality assurance. They will contribute to test design, automation, API validation, and infrastructure review while helping maintain a strong quality culture within the engineering team.

Responsibilities

• Design and execute tests for backend systems, including APIs, databases, and service integrations.
• Validate API functionality and performance using tools such as Postman, Swagger, or similar platforms.
• Test and verify database operations, queries, and data integrity in systems using PostgreSQL or similar relational databases.
• Collaborate with engineering teams to review pull requests, ensuring code quality and test coverage.
• Support the development and maintenance of automated tests for backend services.
• Participate in reviewing backend infrastructure and identifying potential reliability or performance issues.
• Document and track defects, test cases, and test results using test management tools such as TestRail or similar systems.
• Work closely with developers and product teams to improve testing strategies and overall product quality.

Requirements

• Approximately 2–3 years of experience working with backend technologies, testing, or software development in test roles.
• Experience with Node.js and TypeScript in backend environments.
• Familiarity with SQL databases, particularly PostgreSQL, and experience validating database queries and data integrity.
• Experience testing REST APIs using tools such as Postman, Swagger, or similar API testing tools.
• Understanding of backend testing practices, including API testing, database testing, and integration testing.
• Familiarity with test management tools such as TestRail or comparable platforms is beneficial.
• Comfort reviewing pull requests and backend architecture changes to help ensure quality standards.
• Strong attention to detail, problem-solving skills, and the ability to collaborate with cross-functional teams.