This job has been archived and is no longer active.
$100,000 - $150,000
TLDR: We're looking for an MLE / MLOps to own our inference stack – from optimizing serving engines to building vector search pipelines – bridging Research and Product to ship models that are fast, cheap, and production-ready.
White 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 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
Own inference infrastructure end-to-end: optimize latency, throughput, and cost across our model fleet.
Build and scale model serving with TensorZero, vLLM/SGlang/TRT, and Kubernetes.
Design and maintain vector search pipelines with Vector storages.
Familiarity with support metrics (SLAs, FCR, deflection) and ability to define service health KPIs.
Turn research into product: grab experimental models from the research team, figure out what's production-ready, and ship it - formatting, sampling parameters, deployment, the whole thing
3+ years shipping high performance ML systems in production, not just training notebooks
Deep hands-on experience with inference optimization - you've debugged latency spikes and know the difference between theoretical and real-world throughput
Comfortable across the stack: from CUDA kernels to Kubernetes manifests to Grafana dashboards
A big plus: experience with Rust, custom Triton kernels, benchmarks
Salary of $100,000 to $150,000 + equity
20 days of paid vacation
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
Intro call with one of our colleagues
Complete the take-home exercise
Show your best during the technical interview
Final call with our CEO and CTO
White Circle
White Circle is an AI Safety company building the safety, reliability, and optimization layer for AI systems.
Archived on: 7/9/2026
