Senior Software Engineer - Fullstack Js

October 24, 2026

Hybrid

Senior

Paris, France

Indeed

Keep in mind

Original vacancy is in French
You will likely need French for the job. The employer can confirm

Also worth knowing

Mandatory office attendance
3 days per week

Description

A European cyber-insurance scale-up is hiring a Senior Software Engineer - Fullstack JS to work across the whole product lifecycle inside an autonomous squad made of a PM, a designer and TypeScript developers. The product line covers insurance distribution platforms for brokers and a cybersecurity platform with vulnerability scans, phishing simulations and awareness training used by 12 000 companies. Engineering runs in a monorepo built on Clean Architecture, with React and TypeScript on the frontend and NestJS with PostgreSQL on the backend, and AI agents are part of the daily workflow. The role is hybrid, based in Paris or the Paris region with 2-3 days a week in the office.

Responsibilities

Design and implement robust features in the monorepo structured around Clean Architecture principles
Turn complex business logic into simple journeys and reusable building blocks for new products and markets
Carry features end to end in fullstack mode: challenge specs and designs, develop, test, talk to stakeholders and iterate after release
Design products able to absorb the specifics of the different European markets the company operates in
Use code agents for spec challenges and AI-assisted code review without lowering the quality bar
Investigate bugs and improve the codebase together with internal AI agents that have access to logs, tickets and code
Contribute to internal tools and automations, specification, prototyping and support processes

Requirements

Minimum 5 years of experience with a strong command of the JS ecosystem, TypeScript being a prerequisite
Prior experience building applications with heavy business logic
Autonomy and initiative to own topics end to end and propose sound trade-offs
Strong attention to detail on both code structure and quality of the final result
Business sense and understanding of distribution and conversion challenges, reasoning in terms of value for the end user
Comfortable working fullstack across frontend (React, TypeScript) and backend (NestJS, PostgreSQL)
Knowledge of Clean Architecture and modular domain-oriented design principles
Ability to challenge specs and designs together with PMs and Designers

Conditions

Permanent contract
Hybrid format: based in Paris or the Paris region and coming to the office 2-3 days a week
Autonomous squads of a PM, a designer and TypeScript developers, grouped into Distribution and Security tribes
Two tribes with separate products: insurance distribution platforms for brokers and the cybersecurity platform
Office located in Paris 75008
Company scale-up context: 180+ employees across 7 European countries and 12 000 protected companies