Senior Frontend Engineer, Live Run UI (React/TS)

H Company; Paris; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

H is hiring a senior front-end engineer to build the H Platform web app and the HoloTab Chrome extension. You’ll work with React and TypeScript, delivering robust UI and collaborating on Python API changes behind the scenes in a hybrid setup across Paris and London.

You’ll design live run views and replay features, establish shared component patterns, and help teams watch and steer agents in real time, while shipping code that users rely on daily.

Qualifications

• Shipped a production product in React/TypeScript as a senior engineer.
• Experience implementing API changes alongside UI work.
• Write correct, concurrent UI code.
• Handle live, async data in the UI.
• Experience with Python would help.

Responsibilities

• Build the H Platform web app.
• Build and improve the HoloTab extension.
• Design live run view and replay features.
• Change the Python APIs behind a feature.
• Set shared component patterns.

Skills

React

TypeScript

Live data UI

Frontend architecture

Chrome extension

Tools

Chrome extensions

Chrome DevTools Protocol

FastAPI

Preact & Vite

Job description

H is hiring a senior front-end engineer to build the H Platform web app and the HoloTab Chrome extension. You’ll work with React and TypeScript, delivering robust UI and collaborating on Python API changes behind the scenes in a hybrid setup across Paris and London.

You’ll design live run views and replay features, establish shared component patterns, and help teams watch and steer agents in real time, while shipping code that users rely on daily.