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Salary
$56k – $61k per year
Location
Hybrid (Paris, France)
Seniority
Senior · 5+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 1, 2026. First seen by Alion on Oct 23, 2026.

Overview
Company
Impact
Profile match
Warren Walter is a French digital consultancy committed to accessible and inclusive digital products, offering measurement, training and support. It audits websites against the RGAA accessibility standard and its consultants and developers work on front-end, accessibility and data platform missions for clients in mobility and other sectors. The company is headquartered in Paris, France.

Rejoignez notre équipe en tant que Développeur Backend Node.js Senior. Vous serez responsable de la conception, du développement et de l'amélioration continue de services backend robustes et performants. Vous travaillerez avec des environnements techniques modernes et participerez à des projets nécessitant une expertise confirmée en développement JavaScript côté serveur.

Missions

  • Concevoir, développer et faire évoluer des services backend en JavaScript ES6+ avec Node.js 22 ou supérieur.
  • Développer des applications backend robustes à l'aide de frameworks tels que NestJS, Express, Fastify ou Koa.
  • Participer aux choix techniques et à la structuration des architectures backend afin de garantir la maintenabilité et la performance des applications.

Profil recherché

Vous justifiez d'au moins **5 ans d'expérience significative en développement backend JavaScript / Node.js**, avec une solide maîtrise de la conception et du développement de services et d'API.

Vous maîtrisez notamment :

* **Backend :** JavaScript ES6+, Node.js 22 ou supérieur.

* **Frameworks :** expertise sur au moins un framework parmi NestJS, Express, Fastify ou Koa.

* **API :** conception, développement et sécurisation d'API REST, maîtrise des formats JSON et YAML.

* **Tests et qualité logicielle :** pratique des tests automatisés avec Jest, Mocha/Chai ou Sinon, et suivi de la couverture de code avec Istanbul/NYC.

* **Environnement de développement :** utilisation du terminal Bash sous Linux ou macOS.

* **Outillage Node.js :** NPM, Nodemon et PM2.

* **Gestion de version :** Git, GitLab et workflows collaboratifs.

* **Documentation :** capacité à comprendre et exploiter des documentations techniques complexes en anglais.

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