Full Stack Engineer

Einklang New Energy; Köln; Vor Ort; EUR 55.000 - 75.000; Vollzeit

Benefits dieser Stelle

Impactful work for renewable energy

Fast-paced startup environment

Significant ownership in projects

Collaborative team

Strong personal growth opportunities

Practical wellbeing perks

Zusammenfassung

A green energy startup located in Köln is seeking a Full Stack Engineer who will bridge technical energy platforms with customer experiences. This role involves designing user-friendly interfaces and developing scalable applications that communicate complex optimization data effectively. You will collaborate with product and engineering teams to translate challenges into intuitive user flows. The ideal candidate is passionate about renewable energy, has strong technical skills, and thrives in a fast-paced environment.

Qualifikationen

• Experience with frontend frameworks such as React, Next.js or SvelteKit.
• Strong UI/UX and data visualization understanding.
• Backend experience in Python or Node.js.
• Knowledge of energy market or grid systems.
• German language skills are beneficial.

Aufgaben

• Build user-facing applications communicating complex energy data.
• Develop scalable front- and backend solutions.
• Translate technical challenges into user-friendly flows.
• Own features end-to-end and rapidly push ideas to production.
• Define the customer experience of the energy platform.

Kenntnisse

Curiosity

Proactivity

Communication

Ownership

Fast learning

Passion for problem-solving

Tools

Python

Postgres

Docker

GitHub

Terraform

React

Next.js

SvelteKit

Jobbeschreibung

Join to apply for the Full Stack Engineer role at Einklang New Energy

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 green. We achieve this by combining intelligent battery storage and flexible energy supply through our orchestration layer, Einklang OS.

Who We Are

We are a startup focused on renewable energy, delivering green battery solutions across Europe.

Your Role

As a 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.

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

Benefits

• 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

Ready to power Europe’s energy future?

Send us your profile — we’d love to meet you.