> Markdown version of [/jobs/ext/2332768-backend-qa-engineer](https://www.wearedevelopers.com/jobs/ext/2332768-backend-qa-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Backend QA Engineer

- **Company:** Lush Ltd.
- **Location:** London, UK
- **Experience:** Experienced
- **Contract:** Temporary contract
- **Skills:** Testing (Software), Application Programming Interfaces (APIs), Agile Methodology, Automation of Tests, Databases, Data Integrity, Database Queries, DevOps, Amazon DynamoDB, Github, Apache JMeter, Python (Programming Language), PostgreSQL, Load Testing, Log Analysis, Message Broker, MongoDB, MySQL, NoSQL, OAuth, Open Web Application Security, Software Architecture, RabbitMQ, SQL Databases, Data Streaming, TypeScript, Postman, Grafana, Gatling, Backend, Gitlab-ci, Apache Kafka, Graphql, Restful APIs, Api Management, Docker, Microservices
- **Published:** August 4, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=24f82ce9145d9333

## About the Role

* Experienced: 2+ years of dedicated software testing experience with a strong focus on backend architecture, API testing, and data integrity.
 * API & Database Proficient: Hands-on experience with API tools (Postman, REST Assured, Insomnia) and database querying (PostgreSQL, MySQL, MongoDB, or DynamoDB).
 * Automation Skilled: Comfortable writing and maintaining backend test suites in TypeScript or Python.
 * Environment Savvy: Working knowledge of Docker containerization for local testing and familiarity with CI/CD pipelines (e.g., GitHub Actions, GitLab CI).
 * Analytical & Collaborative: Excellent root-cause analysis skills, strong technical communication, and a proactive approach to highlighting risks and edge cases early.

 * Prior experience in performance and load testing (k6, JMeter, Locust, Gatling).
 * Familiarity with message brokers (Kafka, RabbitMQ) and distributed microservices.
 * Understanding of security compliance standards (OWASP, NIST 2.0 CSF).
 * Experience in retail, e-commerce, or fast-paced digital operations.

## Description

In this role, you'll focus on the engine under the hood-ensuring our APIs, databases, microservices, and server-side logic are fast, reliable, secure, and built to scale. You will work across product teams to validate approaches, catch complex edge cases early, drive automation, and ensure feature updates never compromise global stability., * API & Backend Validation: Design, execute, and maintain test suites for GraphQL and REST APIs, verifying payload structures, status codes, and optimal response times.

 * Automation & Integration: Build and maintain automated test frameworks for backend services in TypeScript or Python, integrating automated E2E test runs into our CI/CD pipelines.
 * Data & Architecture Testing: Write complex database queries (SQL/NoSQL) to verify data flow, migration scripts, and backend consistency. Test distributed microservices and asynchronous workflows (e.g., Kafka, RabbitMQ, Pub/Sub).
 * Performance & Security: Conduct performance and load testing using tools like Grafana k6 or JMeter. Assess backend security against OWASP API Top 10 guidelines and verify authentication mechanisms (JWT, OAuth).
 * Defect Diagnosis & Observability: Use tracing tools (e.g., Grafana Tempo) and log analysis to isolate complex breakpoints and collaborate with Developers and DevOps on root-cause fixes.
 * Agile Collaboration: Serve as an active member of an autonomous agile team, preparing test scenarios, supporting continuous testing, and advocating for quality in planning and architecture discussions.