Backend Developer – Energy Software (Python/Django)

About the role

METLEN Energy & Metals is seeking a Backend Developer to join its new energy software company, Joule, within the Integrated Energy Utility Division. You will help build scalable digital solutions that support energy services, data‑driven applications, and smart energy systems.

Key responsibilities

• Design, develop, and maintain backend services and APIs using Python, Django and/or Flask.
• Work with PostgreSQL and MongoDB for data storage and processing.
• Develop data‑driven solutions using Pandas and NumPy.
• Containerize applications with Docker and collaborate through Git.
• Troubleshoot and optimise backend applications in distributed, data‑intensive environments.
• Collaborate with frontend developers, data scientists, and energy domain experts to deliver new features.

Required profile

• 3+ years of professional backend development experience.
• Strong proficiency in Python with hands‑on experience in Django and/or Flask.
• Solid knowledge of PostgreSQL and MongoDB.
• Familiarity with Docker, Git, Pandas and NumPy.
• Strong debugging, problem‑solving and performance‑tuning skills.
• Experience with Golang and Gin, time‑series data, or networking concepts is a plus.
• Knowledge of Modbus, MQTT, OPC UA, or IEC 60870‑5‑104 (IEC104) is a plus.
• Interest or prior experience in energy, smart grids, renewable energy, or industrial IoT is a plus.

Required skills

• Python
• Django
• Flask
• PostgreSQL
• MongoDB
• Docker
• Git
• Pandas
• NumPy
• Golang (optional)
• Gin (optional)
• Modbus (optional)
• MQTT (optional)
• OPC UA (optional)
• IEC 60870‑5‑104 (optional)
• Time‑series data handling (optional)
• Networking concepts (optional)

What we offer

• Competitive remuneration package.
• Ticket Restaurant benefit.
• Group health‑insurance program.
• Pension plan.
• Flexible cooperation models to boost productivity and innovation.