backend development

We are looking for a backend development for one of our customer who has an expertise in:-

Project context

Goals and deliverables

We are looking for technical expertise that can secure the quality, performance, and scalability of our backend Node.js services, with a significant level of experience corresponding to approximately five years of practice on similar environments.

• Design and develop robust, maintainable, and documented backend services Node.js 22+.
• Implement secure, high-performance, and HTTP best practice-compliant JSON REST APIs.
• Structure architectures with NestJS, Express, Fastify or Koa according to functional and technical constraints.
• Define and maintain an automated testing strategy with Jest, Mocha, Chai, Sinon, Istanbul/NYC and, if necessary, Cucumber/Gherkin.
• Document and test entry points with Swagger, Postman, or curl.
• Implement or enhance Git/GitLab workflows, NPM tools, and runtime processes with Nodemon and PM2.
• Contribute to the containerization of environments with Docker and Docker Compose.
• Design or optimize persistence mechanisms with MariaDB/MySQL, MongoDB, Redis, Prisma, or TypeORM.
• Evaluate and integrate, where relevant, ElasticSearch, Worker Threads, WebSockets, SSE Streams, and Pub/Sub architectures.
• Facilitate collaboration with the Web, Mobile, Product, Design and Ops teams, in particular through clear documentation in Markdown or Confluence.
• Participate in Agile rituals, share knowledge and popularize technical choices to non-technical stakeholders.
• To provide on-call or support interventions in the evenings and at weekends when operational imperatives require it.

Skills

Skill level

NestJS Express

Confirmed

Technical documentation

Expert

Confirmed

Node.js

Expert

Automated Testing

Expert

Expert

API JSON

Expert

Advanced

API REST

Expert

Employment type:-Contract.

It would be hybrid working within Paris only.

Note:-Only apply if you have valid visa in the EU Region, Sponsorship will not be given.