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

• Intro call with HR (20 min)
• Take-home test task
• Technical interview with QA Engineer (1h)
• 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