Senior Software Engineer (m/f/d) – Billing & Pricing Platform

Why now?:
The energy market is going through its biggest shift in 50 years. We no longer just manage electricity, we make it intelligent. RABOT is growing triple digits. We have the product, we have the market fit, now we need you to take the engine to full speed. We're not looking for administrators, we're looking for architects of our growth.

Your Mission:
Every kilowatt-hour that RABOT delivers needs to be correctly priced, billed and processed in real time. Dynamic tariffs, different product lines, growing customer numbers: our billing and pricing systems are the financial backbone of the company. You own the "truth" of our business.

Your job is to bridge the gap between abstract energy data and precise financial execution. You build and scale the backend services that handle complex pricing logic and financial transactions. You work independently on hard problems, bring architectural vision to the table and help the team scale through clean code, solid patterns and shared standards. You are not just a coder; you are a guardian of our platform's reliability.

Your Results:
Month 3 (Ramp-up):
• You are fully independent within our codebase. 
• You ship complex tasks, weigh technical tradeoffs against business timelines and perform sharp code reviews that elevate your peers' implementations.

Month 6 (Performance):
• You provide strategic insights to platform team leadership.
• You've identified and resolved friction points in how our services communicate across teams and have become an active contributor to our Backend Chapter.

Month 12 (Scale):
• You lead Backend Chapter initiatives that bring value to the entire organization.
• You propose and lead cross-domain efforts, coordinating multiple teams to ensure our platform responsibilities are met with world-class standards.

Who we are looking for:
• Autonomous engineer: You take deep ownership of your domain. You don't wait for a ticket; you identify what needs to be built and you execute. You have the architectural vision to see the big picture and the builder mindset to enjoy the implementation.
• Knowledge sharer: You don't just raise your own code, you raise the whole team. Sharp code reviews, architecture discussions, Backend Chapter work: you share actively and make others better.
• Analytical communicator: You distill complex backend challenges into clear narratives for your team and stakeholders. You are resilient, structured and thrive when the stakes and the growth are high.
• Pattern-driven thinker: Your eyes light up when discussing DDD, CQRS and Clean Architecture. You have a deep appreciation for software patterns and know that "done" includes being maintainable and well-tested.

Professional requirements: Strong command of C# and ASP.NET. Solid understanding of SQL (EF Core), API design, microservice architecture and async messaging (e.g. RabbitMQ, Azure Service Bus). Agentic AI-assisted coding is a core part of your workflow. You use tools like Claude Code to move faster and focus on high-level design.

Bonus: DDD, CQRS, TDD, Clean Code Architecture, gRPC or full-stack experience.

What We Offer:
• Impact: You build the systems that make every bill and every dynamic tariff at RABOT possible. When the invoice is correct, it's because of your code.
• Ownership: You shape the architecture and direction of the platform team. You make technical decisions with the team, not against it.
• Culture: Transparent feedback, no politics. We celebrate mistakes as long as we learn from them.

Your Extras:
• Employee discount on RABOT Energy electricity tariff
• Urban Sports Club partnership + Deutschlandticket