Frontend Engineer | React
Team: AI Safety Infrastructure
Location: Paris
Employment type: FullTime
We’re hiring a Frontend Engineer (TypeScript | React) for a fast-growing AI infrastructure startup building the safety and control layer for large-scale AI systems.
THE COMPANY BEHIND THE ROLE:
- AI-native product company operating in the AI safety & infrastructure space
- Backed by international investors
- Processing large-scale AI traffic across enterprise environments
- Training and fine-tuning proprietary models for performance & reliability
- Small, highly technical team shipping fast
The company builds the control and evaluation layer for AI systems - helping organizations define, test, and enforce how AI behaves in real-world environments.
YOUR IMPACT:
- Own and ship end-to-end product features across the frontend and full stack
- Design intuitive, high-quality UX that makes complex AI workflows understandable
- Build seamless product flows - from onboarding to advanced analysis
- Collaborate closely with founders, product, design, ML, and research
- Translate cutting-edge AI capabilities into reliable user-facing tools
- Drive the development lifecycle and influence technical direction and product strategy
- This is a hands-on role where product, AI, and engineering meet.
TECH ENVIRONMENT (HIGH-LEVEL):
- TypeScript, React, Next.js
- Tailwind-based design systems
- LLM integrations (OpenAI API, function calling, context orchestration)
- Data visualization & analysis interfaces
- Full-stack product architecture
- Production deployment & observability
(Deep technical stack shared during interviews)
YOUR SUPERPOWER:
- Strong experience with TypeScript, React, Next.js
- Experience building product features end-to-end
- Comfort working with LLM APIs and AI product workflows
- Ability to write non-trivial SQL and reason about data
- Strong UX sensibility - you care about usability, performance, and polish
- Ownership mindset and strong communication
BONUS POINTS IF:
- Experience building AI product interfaces
- Experience with evaluation dashboards or analytics tooling
- Experience in startups or fast-shipping environments
- Interest in AI safety and AI infrastructure
WHY JOIN:
- Competitive compensation + equity
- Hybrid setup in Europe + relocation support
- Comprehensive health coverage
- Top-tier hardware & tools
- Team off-sites
- Budget for learning & AI tooling
