--- title: 'Research Scientist/Engineer (Agentic Systems) at White Circle' canonical: 'https://feeny.ai/job/research-scientist-engineer-agentic-systems-white-circle-paris-0wqx256fe256' type: 'job' last_seen: '2026-10-17' --- # Research Scientist/Engineer (Agentic Systems) at White Circle - **Company:** White Circle - **Location:** Paris, France - **Compensation:** $150k–$250k - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-06-29 - **Last confirmed live:** 2026-10-17 - **Apply:** https://jobs.ashbyhq.com/whitecircle/6b1ac4a8-00c9-4124-80f6-c533092afab3/application **Skills:** LLM agents, Multi-agent systems, Adversarial environments, AI engineering, Software engineering, Container orchestration, Empirical research, Red-teaming, Post-training, Automated red-teaming, Agentic environments, Model failure monitoring, Benchmark reproduction > Build adversarial and multi-agent environments to study how LLM agents fail, catalog failure modes, and develop tooling for AI safety research. ## Job description TL;DR: We're looking for a research scientist to build autonomous, large-scale environments that push LLM agents (single and multi-agent) to failure, and study how they actually break. ## 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 recently raised our Series A funding round, taking our total funding to $70M. Our investors include top funds, founders, and senior leaders at OpenAI, Anthropic, HuggingFace, Mistral, DeepMind, Datadog, Sentry, and others - We process over 100M+ 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. ## About the team White Circle's fundamental research team works on the science of how AI systems fail: where agents break, why misalignment and unsafe behaviours emerge, and how to catch them before they reach the real world. We build the evals, benchmarks, environments, and tooling that empirically study the most pressing AI safety concerns — some of which become the guardrails shipped in our products, and some of which become public writeups. ## What you’ll do - Build adversarial environments for agents: complex, uncertain settings that sit on the boundary of agent capability and alignment, where failure is informative rather than trivial. - Build realistic multi-agent environments and instrument them so emergent breakdowns are observable — failures that arise from the agents themselves, not ones scripted from the outside. - Run experiments end to end, against external APIs and our own models, orchestrating many agents in parallel. - Catalogue concrete agent failure modes and build the tooling to surface them at scale. - Turn findings into internal models of agent behaviour and into public writeups. You’ll fit right in if you - Have built at least one non-trivial agent environment or automated research pipeline that ran end to end (single- or multi-agent), and can talk through what broke and why. - Have strong software and AI engineering skills. Can independently orchestrate many agents and containers in parallel without that orchestration being the bottleneck. - Have a track record of empirical research in agents, red-teaming, or post-training where you defined the question, ran it, and drew a defensible conclusion. - Are a fast empirical iterator who is comfortable defining the question when there's no playbook: can take a fuzzy concern ("do these agents collude under pressure?") and turn it into a concrete, falsifiable experiment. - Are an AI power-user — fluent with frontier models and coding agents in your daily work. A big plus - Published research at A* venues on automated red-teaming, agentic environments, or post-training. - Experience building monitoring for model failures and anomalous behaviour. - Experience reproducing public benchmark results and finding where the original methodology is fragile or misleading. - An MSc or PhD in machine learning, computer science, cognitive science, computational neuroscience, physics, or a related quantitative field. - AI safety fellowship (MATS, ASTRA, Anthropic Fellows, etc.), or a comparable self-directed research record. ## Compensation & benefits - Competitive compensation, including equity - Flexible time off - Office in central London/Paris with flexible hybrid setup - Relocation support if you’re moving to Paris, available after your probationary period - Premium private health insurance - Mental health support, including coverage for therapy when you need it - Lunch and dinner covered when you work from the office - Learning and development support for courses, conferences, and opportunities to grow your skills - All the hardware, subscriptions, tools, and services you need - Team off-sites twice a year: we’ve recently been to the Alps, Saint-Tropez, and Marbella Process - Intro call with Talent - Test assignment - Technical interview with Head of Fundamental Research - Final interview with CEO ## About White Circle ## Company Overview - **One-liner**: White Circle is a control layer for AI in production, providing safety, security, evals, and performance optimization through a unified API. - **Entity Type**: Private (Seed stage) - **Headquarters**: Dover, Delaware, United States (operational hub in Paris, France) - **Founded**: 2025 - **Founders**: Denis Shilov (Founder & CEO) ## Core Business - **Primary industry**: AI Governance, AI Security, AI Observability - **Target customers**: B2B, Enterprise (companies deploying AI agents, chatbots, or LLM-powered applications) - **Mission or purpose**: To give organisations visibility into how their AI behaves, help them respond when things go wrong, and provide a unified system for improving reliability, safety and compliance. ## Products & Services - **White Circle Platform**: A single API that integrates three layers: - **Protect**: Custom low-latency guardrails for blocking unsafe inputs, preventing jailbreaks, detecting prompt injections, PII leakage, and sensitive data leaks. - **Observe**: Real-time analytics including topic classification, user behavior clustering, custom metrics, error rate analysis, sentiment analysis, and risk scoring. - **Improve**: Model routing, dynamic prompt engineering, context enrichment, and automated optimization based on labelled user feedback. - **CircleGuardBench**: A proprietary benchmark for evaluating AI moderation models across harm detection, jailbreak resistance, false positives, and latency. - **KillBench**: A benchmark of hidden LLM biases in critical decisions (life-and-death scenarios). ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric**: $11M raised in seed funding (announced May 2026) - **Notable Investors/Partners**: Backed by prominent AI and technology leaders including Romain Huet (ex-Head of Product @DeepMind), Dirk Kingma (Anthropic), Guillaume Lample (Mistral), Thomas Wolf (Hugging Face), Olivier Pomel (Datadog), François Chollet (Keras), Mehdi Ghissassi (ex-DeepMind), Paige Bailey (DeepMind), and David Cramer (Sentry). - **Growth Signals**: - 21 employees (+283.3% YoY, +9.5% monthly growth) - Monthly website traffic: 32,090 visits (+682.7% yearly) - Active job postings: 6 (monthly job posting growth +20%) - SOC 2 Type II and HIPAA compliant - Operates in 7 countries (France, Russia, Netherlands, Serbia, Switzerland, Georgia, Spain) ## Competitive Advantages - **Proprietary self-adjusting models** optimized for low-latency and high performance - **Unified platform** that combines safety, security, evaluation, and performance optimization – no need for multiple point solutions - **Enterprise-grade compliance** (SOC 2 Type II & HIPAA) - **Strong network effects** from backing by leaders at OpenAI, Anthropic, DeepMind, Hugging Face, and Datadog - **Automated red-teaming** and continuous improvement through user feedback ## Strategic Focus - Accelerate product development and expand the team across the US, UK, and Europe - Grow global customer base across healthcare, finance, hiring, and security verticals - Continue building benchmarks (CircleGuardBench, KillBench) to shape AI safety standards - Maintain deep integration with the AI open-source ecosystem ## Why Work Here - **Culture**: “Smart, friendly, and fun” team with a strong engineering and research focus (43% technical staff) - **Location**: Based in Paris, France with a hybrid work model (office + remote) - **Benefits**: - Strong salary - 20 paid days off (plus ability to take more for recovery) - Free education (company covers learning costs) - Team offsites several times a year - **Open roles** (June 2026): QA Engineer, Product Engineer (Backend), DevOps Engineer, Product Designer, AI Engineer (Audio), Data Engineer - **Impact**: Build the future of AI safety at a well-funded, high-growth startup with world-class investors ## Sources 1. [whitecircle.ai](https://whitecircle.ai) 2. [whitecircle.ai/careers](https://whitecircle.ai/careers) 3. [LinkedIn – White Circle](https://www.linkedin.com/company/whitecircle) 4. [Tech.eu – White Circle lands $11M](https://tech.eu/2026/05/12/white-circle-lands-11m-to-help-companies-secure-ai-systems/) ## Other roles at White Circle - [Communications Designer](https://feeny.ai/job/communications-designer-white-circle-new-york-ey2w1jd32xf0) — New York, NY - [DevRel Lead (Developer Relations)](https://feeny.ai/job/devrel-lead-developer-relations-white-circle-global-wbzmpkvykeb1) — Global - [Production Manager](https://feeny.ai/job/production-manager-white-circle-new-york-ns09sg8xf428) — New York, NY - [Content Lead](https://feeny.ai/job/content-lead-white-circle-new-york-a57fyake800m) — New York, NY - [Talent Lead](https://feeny.ai/job/talent-lead-white-circle-san-francisco-4r6c7dgw1p84) — San Francisco, CA - [Finance Lead](https://feeny.ai/job/finance-lead-white-circle-new-york-s3jtsbzkwt7f) — New York, NY - [Brand & Visual Designer](https://feeny.ai/job/brand-visual-designer-white-circle-new-york-3v7jkx8gskhf) — New York, NY - [Founding Account Executive](https://feeny.ai/job/founding-account-executive-white-circle-new-york-rns9xb4d5gj6) — New York, NY - [Recruiter (Research)](https://feeny.ai/job/recruiter-research-white-circle-new-york-1vekq2rdfrvz) — New York, NY - [Senior Data Labeler](https://feeny.ai/job/senior-data-labeler-white-circle-paris-vtp78vea9yp4) — Paris, France