Data Engineer - Energy Storage & Optimization

As our Data Engineer for Storage & Optimization, you will build the cloud-based logic that makes our batteries smart. Your code will decide how to operate the battery to serve local, grid-driven, and market-driven applications. Ensuring our customers always have access electricity at the lowest possible cost. You will work at the intersection of energy markets, cloud engineering, and optimization algorithms - shaping a system that directly impacts Europes̓ energy future.

What You'll Do

• Design, build, and maintain our cloud-native optimization pipeline for battery storage systems.
• Develop scalable data models and services that help our system forecast, decide, and act.
• Work closely with product, energy specialists, and engineering to turn complex energy dynamics into clean, robust code.
• Own your projects end-to-end - from idea * architecture * implementation * production.

• Curious, proactive, and communicative - you love exploring new domains.
• Ready to take ownership and drive decisions independently.
• Fast learner with a genuine motivation to dive deep into the energy domain.
• Passionate about building real systems that solve real problems.

Our Tech Stack

• Python
• Postgres
• Docker
• Github
• Terraform

Nice to Have

• Cloud experience (e.g., AWS, GCP, Azure, Hetzner, etc.)
• Energy market or grid knowledge
• Optimization / operations research background
• German language skills

Why You'll Love Working With Us

• Build technology that shifts Europe toward renewable energy
• Work in a fast-paced startup shaping the energy transition
• High ownership and high impact - your work directly moves real electrons
• A collaborative, mission-driven team with a great office in the heart of Cologne
• Strong personal growth opportunities in a rapidly scaling environment
• Meaningful work that directly contributes to a greener and more resilient energy system
• Practical perks that support your wellbeing, like Urban Sports and Deutschlandticket option

At Einklang, we believe in powering the world in harmony with sun and wind. Our mission is to empower European companies to compete globally by providing access to the cheapest electron, which we believe will always be a green one. We achieve this by combining intelligent battery storage and flexible energy supply through our orchestration layer, Einklang OS.