Hybrid Freelance Backend Developer — Open Source & APIs

Smile; Sint-Pieters-Woluwe; Hybride; EUR 83 000 - 165 000; Plein temps

Résumé du poste

Smile in Brussels is seeking a freelance Backend Developer to join our dynamic team on high-impact projects for a major client. The role is hybrid (2-3 days remote per week) with a focus on scalable APIs, microservices, and cloud-native architecture.

The candidate should have strong expertise in Python/Node.js/Java/Go, databases, REST/GraphQL, and Docker/Kubernetes. English is required; French or Dutch is a plus.

Qualifications

• Proven experience building scalable backend APIs and microservices.
• Strong knowledge of relational and non-relational databases.
• Experience with cloud platforms and containerization is a plus.
• Professional fluency in English; French or Dutch is a plus.

Responsabilités

• Design and develop robust backend APIs and microservices.
• Ensure code quality with unit/integration tests and CI/CD.
• Collaborate with frontend, product owners, and DevOps.
• Optimize for speed, security, and scalability.
• Troubleshoot production issues to maintain availability.
• Senior profiles: mentor juniors and drive architecture decisions.

Connaissances

Backend development

Python

Node.js

Java

Go

Outils

PostgreSQL

MySQL

MongoDB

RESTful APIs

GraphQL

Docker

Kubernetes

CI/CD

Git

Description du poste

Smile in Brussels is seeking a freelance Backend Developer to join our dynamic team on high-impact projects for a major client. The role is hybrid (2-3 days remote per week) with a focus on scalable APIs, microservices, and cloud-native architecture.

The candidate should have strong expertise in Python/Node.js/Java/Go, databases, REST/GraphQL, and Docker/Kubernetes. English is required; French or Dutch is a plus.