Full Stack Engineer

As our Full Stack Engineer, you will build the bridge between our technical energy platform and the customer experience. You will design and develop intuitive interfaces that make complex optimization decisions easy to understand. Your work will ensure that our customers see, trust, and benefit from the intelligence of our battery systems in a clear and user-friendly way.

You will collaborate closely with backend, product, and energy experts to transform technical insights into smooth, beautiful, and highly usable applications. From frontend interactions to backend integrations, you will shape how our customers experience the future of renewable energy.

What You'll Do

• Build and maintain user-facing applications that clearly communicate complex energy and optimization data.
• Develop clean, scalable, and high-quality front- and backend solutions.
• Work with product and engineering to translate technical challenges into intuitive UX flows.
• Iterate rapidly, own features end-to-end, and push ideas from concept to production.
• Help define the customer experience of our energy platform.

Who You Are

• 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
• React / Next.js / SvelteKit

Nice to Have

• Experience with frontend frameworks (e.g., React, Next.js, or SvelteKit)
• Strong understanding of UI/UX and data visualization
• Backend experience in Python or Node.js.
• Energy market or grid knowledge
• 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.