# Backend QA Engineer, Berlin at Air Apps

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design and execute test plans for backen

- **Company:** Air Apps (https://jobs.trythestack.co/companies/air-apps)
- **Location:** Germany
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 2–5 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Backend testing, Node.js, TypeScript, PostgreSQL, API testing, Postman, Swagger, Test automation, Database integrity, Integration testing, TestRail, Code review, Infrastructure review, Quality assurance, Problem-solving
- **Posted by employer:** 2026-04-16
- **Added to The Stack:** 2026-08-29
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/airapps/a53612d9-0e9f-4645-b39a-2f1a282b2e31 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/backend-qa-engineer-berlin-air-apps

## About the role

Responsibilities:
- Design and execute test plans for backend systems: APIs, services, and database interactions.
- Validate REST APIs (functionality and performance) using Postman, Swagger or similar tools.
- Verify database operations, queries, and data integrity for PostgreSQL-backed systems.
- Develop and maintain automated backend tests and integration suites.
- Review pull requests to ensure test coverage and enforce quality standards.
- Participate in infrastructure reviews to detect reliability and performance risks.
- Document test cases, defects, and results using TestRail or equivalent.

Requirements:
- ~2–3 years in backend testing or development-in-test roles.
- Practical experience with Node.js and TypeScript in server environments.
- Strong SQL skills and hands-on PostgreSQL experience for validating data integrity.
- Familiarity with API testing tools (Postman, Swagger) and test automation frameworks.
- Experience with integration and performance testing practices.
- Comfortable reviewing code and infrastructure changes with engineers.
- Good problem-solving, communication skills, and willingness to work onsite in Lisbon (relocation support available).

## Responsibilities

The Backend QA Engineer will design and execute tests for backend systems, including APIs, databases, and service integrations. They will also collaborate with engineering teams to review pull requests and maintain high-quality standards across the infrastructure.

## Requirements

The ideal candidate has 2–3 years of experience with backend technologies, specifically Node.js and TypeScript. Proficiency in SQL databases, REST API testing tools, and a strong understanding of backend testing practices are required.

## FAQ

- **Is this Backend QA Engineer, Berlin role still open?** It was posted on 2026-04-16. Listings more than 30 days old may no longer be active, so check Air Apps's site before applying.
- **Does Air Apps offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Air Apps's site.
- **Where is this role located?** The listing gives the location as Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: Backend testing, Node.js, TypeScript, PostgreSQL, API testing, Postman, Swagger, Test automation, Database integrity, Integration testing, TestRail, Code review, Infrastructure review, Quality assurance, Problem-solving.

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## About The Stack

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## Notes for agents

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