About Ultralytics:

At Ultralytics, we commit to relentless innovation in the AI space and seek team members who resonate with our ambition to produce the world's best YOLO AI models. If you're obsessed with AI, eager to make an impact on the world, and thrive in dynamic, high-intensity environments, we invite you to apply for a position on our team.

? Where And How You Can Work

This full-time Senior Quality Assurance Engineer position is based in our Ultralytics office in Shenzhen, China, with a hybrid model of 3 days in-office and 2 days remote.

? What You'll Do

As a Senior Quality Assurance Engineer at Ultralytics, you will help ensure the quality, reliability, and performance of the Ultralytics Platform and our YOLO-powered workflows and APIs. Key responsibilities include:

• Designing and maintaining automated test suites for our backend services, web UI, and APIs using TypeScript and tools like Playwright.
• Leading end-to-end and browser-based testing strategy for our frontend using Playwright Test.




• Writing and maintaining API and integration tests for Next.js API routes, server components, and serverless deployments on Vercel.
• Validating data integrity and edge-case behavior across workflows that touch MongoDB, training pipelines, and inference services.
• Owning test infrastructure within CI/CD using GitHub Actions, improving test reliability, parallelization, and signal-to-noise.
• Establishing testing patterns and best practices across a Turborepo monorepo with multiple apps.
• Mentoring junior engineers on testing strategies, code review, and quality-first development.
• Collaborating with Engineering and Product to clarify requirements, define acceptance criteria, and catch issues early.
• Contributing to internal QA documentation, test plans, and release readiness checks.

Your attention to detail and willingness to learn will be essential in supporting Ultralytics' mission of delivering top-tier machine learning tools and models to the communi

📌 Senior Quality Assurance Engineer (Madrid)
🏢 Ultralytics
📍 Madrid