Senior Software Engineer (Backend) – Large Assets Squad (m/f/d) in Berlin

You are interested in the position as Senior Software Engineer (Backend) – Large Assets Squad (m/f/d) at Rabot Energy DE GmbH ? On Instaffo, you can apply for this and other jobs with ease. Create your profile in under 2 minutes and start the application process with just a few clicks. Please note that this position requires work authorization for Germany . The language requirements for this position are: English - Fluent (C1) . The estimated salary range from XING does not necessarily correspond to the salary range of this job offer. EVs, heat pumps, wallboxes: more and more households have large energy consumers that can be intelligently controlled. For RABOT to optimize these assets in real time, they first need to be connected to our platform. Every new hardware manufacturer, every new protocol, every new device class is an integration that must be reliable, scalable and maintainable. You build the backend systems that make this connection happen. You design the APIs that make complex energy data accessible for customers and frontend. And you work closely with our optimization team (data scientists, data engineers) so that raw data becomes intelligent control. When a customer charges their EV at the optimal time and saves money, it's because your backend works in the background. Activities We think in outcomes, not task lists. If you're successful, here's what that looks like: Month 3 (Ramp-up) You understand our platform architecture, existing integrations and tech stack (C#/.NET, MongoDB, Docker, Kubernetes, GCP/Azure) deeply enough to independently plan and ship features and integrations. You've shipped your first hardware provider integration or significantly improved an existing one. The team values your input on architecture decisions. Month 6 (Performance) You've successfully integrated multiple external hardware providers into our ecosystem. Integrations are stable, scalable and well-documented. You've refactored existing backend systems to efficiently support new asset types and manufacturers. You've introduced code or process improvements that increased team quality or velocity. Month 12 (Scale) You're the go-to technical reference for hardware integrations and backend architecture in the Large Assets Squad. The platform is built so that new providers and device classes can be connected with significantly less effort than before you started. New engineers onboard faster because you've shared knowledge, documented standards and set the bar. Requirements Systems thinker: You think in distributed systems, API design and scalability, not individual endpoints. Integration pro: You have experience connecting external systems, APIs and hardware providers. You know that "it works" isn't enough. Integrations need to be reliable, maintainable and well-documented. Quality-driven: CI/CD, TDD and clean code are daily practice for you. You write code that others can understand and build on. Knowledge sharer: You don't just raise your own code, you raise the whole team. Code reviews, architecture discussions, pair programming: you share actively and make others better. Product thinker: You don't just build what's in the ticket. You understand the customer problems behind an integration and bring technical insight into product decisions. Professional requirements: Strong in C# and .NET Core. Solid understanding of MongoDB, Docker, Kubernetes and cloud environments (GCP/Azure). Comfortable with CI/CD pipelines, TDD and agile development principles. AI coding tools like Claude or Cursor are part of your natural workflow. Fluent in English. Based in or willing to relocate to Hamburg. Bonus: Hands-on with hardware integrations (IoT, smart meters, EV charging), energy sector or event-driven architecture. Team You will join our Large Asset Squad. All roles in this Squad work AI-first. Application Process 30-min screening call with recruiter 1-hour cultural interview with HR Take Home Assignment 30-min call with Engineering Manager 1-hour techincal interview with the team in the office on-site (Berlin or Hamburg) Optional 15-min call with CEO office About the Company Rabot Energy ist ein unabhängiger Anbieter dynamischer Stromtarife mit 100% Ökostrom . Mit unseren innovativen Einkaufsstrategien gewährleisten wir sowohl ökologische Nachhaltigkeit als auch Kostenoptimierung im Home Energy Management. Durch die Weitergabe der Börseneinkaufspreise an unsere Kunden können wir deren Stromrechnung im Schnitt um 35 % reduzieren. Besitzer von Elektrofahrzeugen und Smart Metern können besonders von unserem dynamischen Stromtarif profitieren, da sie ihre Fahrzeuge zu Hause automatisch dann laden können, wenn die Börsenstrompreise besonders günstig sind. In unserer Rabot Energy App lassen sich die Ladepräferenzen einfach festlegen sowie die Börsenstrompreise aktuell verfolgen. Mit unseren intelligenten Ladelösungen tragen wir aktiv dazu bei, den Anteil von Ökostrom am Gesamtstromverbrauch in Deutschland zu erhöhen. Unsere Vision ist es, jedem Kunden die Möglichkeit zu geben, den eigenen Energieverbrauch smart zu steuern und dabei Umwelt und Ressourcen zu schonen. Mit dem Angebot eines smarten Lade- und Energiemanagements trägt Rabot Energy dazu bei, die Energiewende aktiv voranzutreiben. Mit unserer Idee konnten wir bereits über 150.000 Kunden überzeugen.