Senior Full Stack Engineer
H Company · Hybrid London · Hybrid Paris
CHECKED 9H AGO
Frontier labremotesenior
At a glance
Highlights
- Build interfaces to deploy agents, follow them live and replay step by step.
- Own how live agent runs appear, play back, and can be steered mid-action.
- Shape HoloTab extension that controls the browser on the user's behalf.
Ideal candidate
Senior product-minded engineer who enjoys discovering what users need and designing interfaces around it. Cares about shipping polished, live experiences and owning a surface end-to-end.
Requirements
- Shipped a production product in React and TypeScript as a senior engineer
- Make the API change a feature needs as well as the UI
- Write correct, concurrent code
- Handle live, async data in the UI correctly
- Enjoy working out what users need and designing the interface around it
- Have worked with Python
- remote policy
- Hybrid with 3 days per week in Paris or London office, plus visit to the other office every 4-6 weeks
- hiring process
- Four stages: 30-minute call with Talent team, 60-minute coding interview, ~2-hour take-home front-end exercise with 45-minute review, and 30-minute closing conversation.
Lab profile
About H Company
Pushing superintelligence boundaries with autonomous agentic AI that automates complex multi-step tasks.
What they build
- Autonomous agentic AI systems
- Foundational infrastructure for autonomous AI
Known for
- Post-training
- Model inference and serving
- AI infrastructure
- Safe and responsible AI development
Key facts
- Teams in Paris, London, and the US