Frontend Engineer - AI Safety / TypeScript / React / Next.js

We're partnered with a genuinely exciting AI safety startup focused on building the safety, reliability, and optimization layer for advanced AI systems.

Their platform uses natural language policies to define model behavior, which are automatically tested and improved at scale. Backed by eleven million dollars from leading investors, the team trains proprietary LLMs that run faster and more efficiently than open source and commercial options. This is a small, focused team where you will work on challenging problems and ship quickly.

They're seeking an AI Research Engineer to join them team on a permanent basis, working on a hybrid model at their HQ in Paris.

What You’ll Do:

• Build fast, reliable front-end interfaces for safety dashboards and developer tools.
• Design and implement APIs and data flows for analytics and monitoring features.
• Work with large datasets stored in ClickHouse.
• Track down and fix cross-browser quirks (yes, Safari included).

What We’re Looking For:

• Strong experience with TypeScript, React, Next.js, Tailwind, and GraphQL.
• Hands-on experience working with LLMs (OpenAI APIs, function calling, context strategies, etc.).
• Ability to write solid, non-trivial SQL without relying on constant reference lookups.
• A genuine focus on design, usability, and performance—not just hacking things together.

Compensation & Benefits:

• Competitive salary + equity
• 20 days of paid vacation
• Hybrid work from Paris with relocation support
• Top-tier medical insurance
• All necessary hardware, tools, and services provided
• Paid subscriptions for AI agents and development tools
• Twice-yearly team off-sites (recent destinations include the Alps and Saint-Tropez)

Visa sponsorship and visa support is on offer, so international applicants are encouraged.

If this sounds interesting and you'd like to learn more, click the link below to apply or email me with a copy of your CV on [email protected]

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