We are seeking a Senior Software Engineer to join a Germany-based engineering team. In this role, you will help build, maintain, and evolve a platform designed to manage and optimise advanced battery systems. The platform supports trading, operations, and optimisation of grid-scale battery energy storage systems (BESS) as well as emerging applications in automotive battery performance.

The Role:

• Develop and maintain core applications – Contribute to new and existing APIs, UIs, and services covering asset dispatch, monitoring, trade management, reporting, and optimisation workflows.
• Collaborate across teams – Work closely with traders, data scientists, operations analysts, and other engineers to design robust solutions that support evolving markets and technologies.
• Deliver high-quality software – Write clean, tested code; maintain reliable deployments on Kubernetes; and produce clear documentation and runbooks.
• Support live operations – Participate in a rotating on-call schedule, troubleshooting live issues with energy storage assets and escalating as needed.

Requirements:

• 5+ years of professional Python experience
• Proven track record with energy trading, grid-scale battery systems, and advanced battery systems (BESS & automotive)
• Strong leadership skills appropriate for a senior engineering role
• Proficiency with API frameworks (FastAPI, Django, etc.)
• Database modelling with Python (ideally SQLAlchemy)
• AWS, Docker, Kubernetes, Github Actions
• Experience with real-time data streaming, orchestration, or transformation tools
• Microservice architectures with zero-downtime deployment focus
• Interfaces with SCADA systems (MODBUS, DNP3)
• Exposure to automotive battery optimisation or energy management

This is an exciting opportunity to work with live, operational assets in a fast-moving sector where both grid-scale and automotive batteries are central to achieving net zero.