Senior Fullstack Engineer

October 1, 2026

Hybrid

Senior

Paris

Worth knowing

English is required

Description

A fast-growing tech startup is hiring a Senior Fullstack Engineer to work on a mobile product used daily by field teams. The company is entering a new phase: internationalisation, large accounts, a shift toward a platform logic and new mobile scalability and performance challenges. You will join a tech team of about ten people and work directly with Product teams and other developers.

Responsibilities

Design and develop features using React, React Native and Node.js
Take part in architecture decisions and foundational technical choices
Work on mobile performance, scalability and debugging problems
Perform and receive code reviews within the team
Improve testing practices, CI/CD pipelines and overall code quality
Work closely with Product from problem understanding through to production release

Requirements

At least 4 years of software development experience, ideally in a startup, scale-up or product environment
Track record of building and evolving a product over the long term in production
Very comfortable with React, React Native, Node.js and TypeScript, or from a closely related ecosystem
Able to explain complex technical problems clearly with context, constraints, options, trade-offs and outcomes
Real product sensitivity, curiosity and ongoing monitoring of the development ecosystem
Deep passion for software engineering, testing new tools and integrating AI tools into development

Conditions

Hybrid work format from the Paris Republique office
Permanent CDI contract with the company
Small, experienced and flat team of about ten engineers

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