Senior Software Engineer

Senior Python / C# Developer – Algorithmic Trading

Location: Brussels, Belgium (Hybrid)

Rate: Up to €800 per day

Start: May 2026

Contract: Initial term with extensions (up to 2+ years)

Overview

A leading European energy trading organisation is seeking a Senior Developer to join a high-impact team building algorithmic trading solutions focused on battery storage (BESS) and renewable energy markets.

This is a front-office aligned role working on real-time systems that directly support trading decisions and execution.

Responsibilities

• Build and optimise real-time trading applications
• Develop tools enabling traders to create and backtest algorithms
• Contribute to a scalable microservices architecture
• Work closely with traders, analysts, and engineering teams
• Deliver enhancements, optimisations, and new features
• Support production systems and monitor performance
• Participate in Agile ceremonies and contribute to technical design

Technical Environment

• Python (core)
• C# / .NET
• REST APIs
• Microservices architecture
• Azure (AKS / cloud-native environments)
• Unix / DevOps tooling

Requirements

• Strong experience with Python and C#/.NET
• Experience working on real-time or high-performance systems
• Solid understanding of APIs and distributed systems
• Experience in microservices-based architecture
• Strong problem-solving ability in complex environments
• Good communication and stakeholder engagement skills

Desirable

• Experience in algorithmic or electronic trading
• Exposure to energy trading or commodities markets
• Knowledge of Docker and Kubernetes
• Experience with Azure or other cloud platforms

Additional Information

• Long-term project with strong extension potential
• Competitive day rate up to €800
• Opportunity to work on high-impact systems within a rapidly evolving energy trading environment