QA Engineer

TLDR: We’re looking for a QA Engineer to help us build reliable, scalable testing infrastructure. You’ll work with Playwright, Python, and CI/CD pipelines to own end-to-end quality across our platform, improve test reliability and speed, and help shape engineering quality standards. ABOUT US White Circle https://whitecircle.ai is an AI Safety company building the safety, reliability, and optimization layer for AI systems. At the core of our platform are policies – simple natural-language rules that define what an AI model should and shouldn’t do. We automatically test, enforce, and continuously improve these policies at scale. - We’ve raised $11M from top funds, founders, and senior leaders at OpenAI, Anthropic, HuggingFace, Mistral, DeepMind, Datadog, Sentry, and others - We process over one hundred million API calls every month - We fine-tune and train our own LLMs so they run faster and cheaper than any open or proprietary model We’re a small, highly focused team. If you want to work deeply on hard problems, see your work ship to production quickly, and influence how AI safety is actually built – you’re the one we need. YOU WILL: - Design, build, and maintain end-to-end test automation frameworks for our web platform and APIs - Own test coverage for new features - Integrate automated test suites into CI/CD pipelines - Write clear, reproducible bug reports and work closely with engineers to get them resolved - Build exploratory and regression test plans for each release cycle - Improve test reliability & speed - Help the team develop a quality mindset: review testability in design, flag risks early YOU’LL FIT RIGHT IN IF YOU: - Have 2+ years of QA automation experience & you’ve built frameworks from scratch - Have experience with Playwright for end-to-end UI testing and know how to structure scalable test suites - Write clean automation code in Python (pytest, fixtures, parametrize) - Have plugged automated tests into CI/CD pipelines (GitHub Actions, GitLab CI, or similar) - Communicate clearly and work well with others & have fluent English - Have experience working with AI coding agents and LLM-powered developer tools, and understand how to use them effectively to improve productivity and testing workflows - Are curious, proactive, and eager to learn new things: you ask questions, think critically, and constantly look for ways to improve and optimise existing processes and solutions A big plus: - Experience testing AI or LLM-based products, handling non-deterministic outputs, confidence scoring, edge-case prompts - Familiarity with performance or load testing (k6, Locust) - Experience with Postman, Insomnia, Yaak or API contract testing - Background in security-aware QA or SOC 2 environments WHY WHITE CIRCLE - Paid time off in line with your local regulations, no matter where you work from - Work from Paris (hybrid) + relocation package - Best medical insurance in France - All the hardware, tools, and services you need - Covered subscriptions for AI agents and IDEs - Team off-sites twice a year: we’ve recently been to the Alps and to Saint-Tropez HOW WE HIRE 1. Intro call with HR (20 min) 2. Take-home test task 3. Technical interview with QA Engineer (1h) 4. Final call with our CEO & Head of Engineering (45 min) Please submit your application in English - it’s our company language so you’ll be speaking lots of it if you join