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