Backend QA Engineer

Air Apps

Backend QA Engineer ensuring reliability, performance, and scalability of backend systems at Air Apps. Collaborating with teams in a fast-paced environment to define resource management.

Posted 4/27/2026full-timeRemote • 🇪🇸 SpainJuniorMid-Level💰 €52,000 - €65,000 per yearWebsite

Tech Stack

Tools & technologies

JavaScriptNode.jsPostgresSQLTypeScript

About the role

Key responsibilities & impact

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

What you’ll need

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.

Benefits

Comp & perks

Annual Bonus
Top-tier Health and Life Insurance for peace of mind.
Transportation Budget to support your commute needs.
Coverflex benefits package for meal allowances, well-being, and more.
Urban Sports Club membership to keep you active.
Meals 100% free at the office.
Pension Fund to support your long-term financial planning.
Annual Conference: an opportunity to meet the team, collaborate, and grow together.
Apple hardware ecosystem for work.

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

API testingdatabase testingintegration testingNode.jsTypeScriptPostgreSQLSQLautomated testingtest coveragetest case validation

Soft Skills

attention to detailproblem-solvingcollaborationcommunication