QA Engineer (Manual + Automation)

funds, founders, and senior leaders at OpenAI, Anthropic, HuggingFace, Mistral, DeepMind, Datadog, Sentry, and othersWe process over one hundred million API calls every monthWe fine-tune and train our own LLMs so they run faster and cheaper than any open or proprietary modelWe’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 willManually test new features and fixes throughout frequent and short (sometimes as short as a working day) release cyclesQuickly understand product changes, identify the highest-risk areas, and provide clear release feedbackPerform exploratory, smoke, regression, and integration testing across our web platform and APIsCreate concise, practical test plans and checklists for new features and releasesInvestigate unexpected behaviour, isolate root causes, and write clear, reproducible bug reportsWork closely with engineers

and product owners to clarify requirements and improve testability before development is completeBuild, maintain, and integrate automated tests for stable/business-critical flows into CI/CD, improving reliability and speedYou’ll fit right in if youHave 2+ years of QA automation experience & you’ve built frameworks from scratchHave experience with Playwright for end-to-end UI testing and know how to structure scalable test suitesWrite 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 EnglishHave experience working with AI coding agents and LLM-powered developer tools, and understand how to use them effectively to improve productivity and testing workflowsAre 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 solutionsA big plusExperience testing AI or LLM-based products, handling non-deterministic outputs, confidence scoring, edge-case promptsFamiliarity with performance or load testing (k6, Locust)Experience with Postman, Insomnia, Yaak or API contract testingBackground in security-aware QA or SOC 2 environmentsWhy White CircleCompetitive compensation package, including equityFlexible time offPaid time off in line with your local regulations, no matter where you work fromWork from Paris or London (hybrid) + relocation package for ParisBest medical insurance in FranceLearning and development support for courses, conferences, and opportunities to grow your skillsAll the hardware, tools, and services you needCovered subscriptions for AI agents and IDEsTeam off-sites twice a year: we’ve recently been to the Alps and to Saint-TropezProcessIntro call with HR (20 min)Take-home test assignmentTechnical interview with QA Engineer (1h)Final call with CEO & Head of Engineering (45 min) #J-18808-Ljbffr

TLDR: We’re looking for a hands-on QA Engineer to own product quality across our rapid release cycles. You’ll spend most of your time manually testing new features and fixes across our web platform and APIs: exploring edge cases, identifying risks, running focused regression checks, and giving the team fast, clear feedback. You’ll also automate stable, high-value scenarios using Playwright and Python, helping us make repeatable testing faster and more reliable. This is a manual-first product QA role where automation is an important tool, not the entire job.About usWhite Circle 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 recently raised our Series A funding round, taking our total funding to $70M. Our investors include top