Senior Python/React Developer - Brussels - Energy Sector - ASAP Start - Freelance / CDI

AlterSolutions

Brussels, Brussels, Belgium permanent

Posted: March 16, 2026

Quick Summary

As a Senior Python/React Developer, you will work alongside internal teams and external collaborators to support the development of modern, efficient and future-oriented technology infrastructure, contributing to the reliability and sustainability of the organisation's technological systems, and be part of a diverse and innovative environment that values collaboration and innovation.

Required Skills

Job Description

The national and European energy sector is undergoing major change. As a key actor in this environment, the organisation is seeking skilled professionals to contribute to the reliability and sustainability of its technological systems.

You will work alongside internal teams and external collaborators to support the development of modern, efficient and future‑oriented technology infrastructure. The organisation values diversity, collaboration, and innovation, believing that inclusive environments lead to stronger results.

The organisation is looking for one Senior Python/React Developer (approx. 10 years of experience) to support ongoing initiatives within an existing team focused on an internal AI platform that enhances communication between staff members.

The developer will be expected to follow internal standards and deliver high‑quality code.

The candidate must have strong knowledge of the following technologies:

AI‑Related (Nice to Have)

• AI agent creation
• LLMs, MCP, A2A, RAG DB
• LangChain, LangGraph, Co‑Pilot

Backend

• Python
• FastAPI
• API & service development
• Messaging systems (RabbitMQ)
• Databases (SQL Server, PostgreSQL, etc.)
• SQLAlchemy
• Security (SAML, OAuth, EntraID)
• Testing with Pytest

DevOps Skills

• Containerization & cloud technologies (Kubernetes, etc.)
• CI/CD (Azure DevOps Pipelines, ArgoCD…)

Frontend

• React
• UI development
• JavaScript
• CSS
• NX (micro‑frontends)

Architecture

• Micro‑services architecture (nice to have)

Soft Skills

• Strong communication abilities
• Team‑oriented mindset
• Accountability and ownership
• Proactive, able to propose ideas with clear reasoning
• Experience with Agile methodologies (Scrum)
• Good proficiency in Dutch and/or French, plus English

• Location: Brussels (central area)
• On‑site presence: 2 days per week
• Work regime: Full‑time

For non‑EU candidates

• Must hold a valid work permit for Belgium
• Must have a residence permit confirming right of residence

Why Apply Through MisuJob?

AI-Powered Job Matching: MisuJob uses advanced artificial intelligence to analyze your skills, experience, and career goals. Our matching algorithm compares your profile against thousands of job requirements to find positions where you have the highest chance of success. This saves you hours of manual job searching and ensures you only see relevant opportunities.

One-Click Applications: Once you create your profile, applying to jobs is effortless. Your resume and cover letter are automatically tailored to highlight the most relevant experience for each position. You can apply to multiple jobs in minutes, not hours.

Career Intelligence: Beyond job matching, MisuJob provides valuable career insights. See how your skills compare to market demands, identify skill gaps to address, and understand salary benchmarks for your experience level. Make data-driven decisions about your career path.

Frequently Asked Questions

How do I apply for this position?

Click the "Register to Apply" button above to create a free MisuJob account. Once registered, you can apply with one click and track your application status in your dashboard.

Is MisuJob free for job seekers?

Yes, MisuJob is completely free for job seekers. Create your profile, get matched with jobs, and apply without any cost. We help you find your dream job without any hidden fees.

How does AI matching work?

Our AI analyzes your resume, skills, and experience to understand your professional profile. It then compares this against job requirements using natural language processing to calculate a match percentage. Higher matches mean better fit for the role.

Can I apply to jobs in other countries?

Absolutely. MisuJob features jobs from companies worldwide, including remote positions. Filter by location or look for remote opportunities to find jobs that match your preferences.

Ready to Apply?

Join thousands of job seekers using MisuJob's AI to find and apply to their dream jobs automatically.

Interested in this position?