Senior Full-Stack Engineer — Real-Time Frontend & API

H Company; Paris; Hybrid; EUR 85,000 - 125,000; Full time

Benefits offered by this job

Hybrid work

Office visits

Competitive package

Job summary

H is building the H Platform and HoloTab, extending the browser experience with frontend in React and TypeScript and Python APIs behind the scenes. As a senior frontend engineer, you will help design live run views, replay UI, and share components, collaborating with product engineers across Paris and London.

This role blends front-end work with occasional Python API adjustments, and emphasizes real-time data handling for FDEs and customers in a hybrid setup.

Qualifications

• Shipped a production React/TypeScript interface.
• Experience designing live data UI and replay features.
• Knowledge of Python APIs is a plus.

Responsibilities

• Build the H Platform web app.
• Improve the HoloTab extension.
• Design live run view and replay.
• Adjust Python APIs behind a feature.
• Define shared component patterns.
• Support long-running workflows for customers.

Skills

React

TypeScript

Frontend

Python

Live data UI

Tools

Chrome extensions

WebSockets

Job description

H is building the H Platform and HoloTab, extending the browser experience with frontend in React and TypeScript and Python APIs behind the scenes. As a senior frontend engineer, you will help design live run views, replay UI, and share components, collaborating with product engineers across Paris and London.

This role blends front-end work with occasional Python API adjustments, and emphasizes real-time data handling for FDEs and customers in a hybrid setup.