Senior Software Engineer (Backend) – Large Assets Squad – C#, .NET (m/w/d)

Permanent employee, Full-time · Hamburg

Overview

Location: Hamburg, Germany (Hybrid – up to 2 remote days/week)
Tech Stack: .NET / C# · Cloud (GCP or Azure) · Docker · Kubernetes
Team Size: 4 Engineers (2 Frontend & 2 Backend), based in Hamburg & Berlin
Employment Type: Full-time, Permanent

Why This Role Matters

At Rabot Energy, we’re transforming how people consume and manage renewable energy. Our mission is simple but bold — to make green energy smarter, more transparent, and accessible to everyone.

As a Senior Software Engineer (Backend) in our Large Assets Squad, you’ll work on the systems that connect large energy assets — such as EVs and heat pumps — into our ecosystem. Your work will directly enable customers to integrate new hardware providers, optimize energy usage, and unlock the full potential of dynamic energy pricing.

This role sits at the intersection of hardware integration, backend platforms, and energy intelligence, and is ideal for an engineer who enjoys complex integrations, distributed systems, and close collaboration with product and data teams.

What You’ll Do

Design, build, and maintain backend services and APIs that integrate EVs, heat pumps, and external hardware providers into Rabot’s platform.
Lead the integration of external providers and manufacturers, ensuring reliable, scalable, and maintainable connections.
Collaborate closely with the Optimization team (Data Scientists, Data Engineers, Product Managers) to enable intelligent energy orchestration across assets.
Improve, refactor, and evolve existing backend systems to support new brands, devices, and use cases.
Work closely with Frontend Engineers to design and implement APIs that expose complex energy data in a meaningful way for customers.
Contribute to system architecture discussions, focusing on scalability, reliability, and long-term maintainability.
Apply engineering best practices including CI/CD, TDD, code reviews, and continuous improvement.
Share knowledge and contribute to a collaborative, customer-focused engineering culture.

What You Bring

Must-Have Experience

5+ years of backend software development experience.
Strong proficiency in C# and .NET Core.
Solid understanding of MongoDB, Docker, Kubernetes, and cloud environments (GCP and/or Azure).
Good understanding of distributed systems and API design.
Experience with CI/CD pipelines, test-driven development (TDD), and agile development principles.
Knowledge of AI Coding Tools (Claude, Cursor, etc.)
Collaborative mindset with a customer-focused engineering approach.
Based in, or willing to relocate to Hamburg.
Fluency in English.

Nice-to-Haves

Experience in energy tech, IoT, or mobility.
Familiarity with event-driven architectures or microservices at scale.
Knowledge of monitoring tools and observability best practices.

What Success Looks Like (6–12 Months)

You’ve successfully integrated multiple external hardware providers into Rabot’s ecosystem.
EV and heat pump integrations are stable, scalable, and well-documented.
Existing backend systems have been improved and refactored to support new assets and brands.
Frontend teams are empowered with reliable APIs that clearly expose energy and asset data.
You’re a trusted contributor within the Large Assets Squad, influencing technical decisions and system evolution.

What It’s Like to Work Here

At Rabot Energy, we believe in autonomy, collaboration, and purpose. You’ll join a dynamic, international team that values open communication, shared learning, and ownership over hierarchy.

We move fast, experiment often, and make decisions based on data and impact. Everyone has a voice here - and the freedom to shape how we grow.

Why Join Rabot Energy

Be part of a mission-driven company shaping the future of green energy in Europe
Work with modern technologies and a talented, passionate engineering team
Enjoy flexible hybrid work, with up to 2 remote days per week
Access to learning, development, and well-being programs, including Urban Sports Club membership
Flat hierarchies, quick decisions, and space to make a real impact
Workation: 2 weeks per year from anywhere in the EU
Extra holidays on Christmas Eve and New Year’s Eve

For all our positions, we are open to providing flexible work arrangements to accommodate the unique needs of each individual.

The Details

Short video introduction (encouraged)
We encourage candidates to submit a short video (2–3 minutes) as part of the application.
It helps us understand how you think and communicate—especially important in a senior backend role.
Using the box below enter a link to a dropbox or google drive folder where you have stored your video (remember to allow view access for everyone)
Video prompts:

What attracted you to Rabot Energy and this role?
Describe a C#/.NET backend decision you made that involved trade-offs
Share an example of taking ownership beyond your core responsibilities

If video isn’t your thing, you can skip this step or request an alternative—no penalty.

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About us

Rabot Energy is an independent supplier of 100 % renewable energy, offering dynamic electricity tariffs to private and business customers. By passing on exchange buying prices to our customers, we can save them up to 35 % on their electricity bills. Electric vehicle owners particularly benefit from our dynamic electricity tariff, as we have developed a smart system that signals the car when to automatically charge during periods of low electricity prices. And this is just the beginning!

Our mission is to empower every consumer to efficiently manage their energy consumption costs while safeguarding the environment and natural resources. Through our provision of 100% renewable energy and comprehensive smart charging and energy management solutions for homes, RABOT Energy actively contributes to increasing the real green power share in Germany's electricity consumption, thus driving the energy transition forward.

"Be part of something unique, the first of its kind in Germany. Join us at RABOT Energy and seize abundant growth opportunities in the thriving world of green energy. We're a team that believes in the power of our mission, and we're looking for individuals with the passion to match ours!”
Jan Rabe, CEO

At Rabot Energy, we cherish cognitive diversity as a cornerstone of our global culture and a driving force behind our mission to craft truly representative and impactful products for a sustainable future. We wholeheartedly embrace diversity in all its dimensions and recognize that each person contributes to our shared endeavour of assisting individuals in transitioning to green energy.

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Your application!

Thank you for your interest in RABOT Energy. Please fill out the following form. If you have any difficulties uploading the data, please contact us by email at jobs@rabot-charge.de.