Skills

Communication Python JavaScript CSS SQL PostgreSQL CI/CD DevOps Kubernetes Azure DevOps Scrum Agile methodologies Architecture SQL Server Azure react Agile FastAPI Langchain

Job Specifications

Job Title: Python/React Development

Location: Brussel, Belgium

Duration: 13/04/2026 - 31/12/2026

Language: Dutch, French, English

Job Description - Roles and Responsibilities

We are seeking for 1 new Senior Python/React developer (about 10 years of experience) to support our ongoing initiatives within our existing team focusing on AI platform for internal everyday usage in client communication between agents. We require the candidate to start at the mid-March or no later than the beginning of May.

Requirements:

The developer will be expected to follow client's standards and ensure high quality code delivery. They should have a strong knowledge of the following technologs

We need a person that knows about the AI agent creation, LLM, MCP, A2A,

RAG DB...

Backend

Python
FASTAPI
Service and API development
Queues and Messaging (RabbitMQ)
Database development (SQL Server, PostgreSQL, etc.) SQLAlchemy
Security (SAML, Oauth, EntraId, etc.)
Testing with: Pytest
AI knowledge is a plus: MCP / A2A, LangChain, LangGraph, Co-Pilot

We also need him/her to have a knowledge of DevOps technics:

Containerization and cloud technics (Kubernetes...)
CI/CD (Azure DevOps pipelining, ArgoCD...)

Frontend

React
UI development
Javascript
CSS
NX – for MicroFrontend

Micro-services architecture knowledge is a plus

Soft Skills:

The candidate should possess good communication skills, have Team mind state
Take accountability for own tasks.
Proactive (bringing his/her ideas to the team with good argumentations)
Working in Agile methodologies (Scrum...)

About the Company

OneSource is a pan European based recruitment, employment agency founded in response to the market demands for more flexible, cost-effective, tailored recruitment solutions. It aims at providing high-quality services to provide the best outcomes in the recruitment and employment of personnel from a diverse set of business sectors. In today's highly competitive and ever-changing IT market, hiring the right candidate can make the difference between success and failure of any mission-critical project. We can navigate you throu... Know more