Senior Mobile Engineer - Flutter (m/w/d)
Rabot Charge
Hamburg, Germany
Posted on Mar 31, 2026
Senior Mobile Engineer - Flutter (m/w/d)
Hamburg
Full-time
Permanent employee
What You’ll Do
- Develop, maintain, and scale our Flutter-based mobile app for iOS and Android.
- Collaborate with Product Managers, Designers, and Backend Engineers to deliver customer-centric features.
- Write clean, maintainable, and testable code using best practices (CI/CD, TDD).
- Contribute to the evolution of our mobile architecture, ensuring performance, stability, and scalability.
- Troubleshoot and optimize application performance for a seamless user experience.
- Take part in code reviews and share knowledge with peers to raise the bar across the team.
- Influence design and product decisions with technical insight and user empathy.
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
Our app is the product customers hold in their hands every day: dynamic electricity prices, EV charging, real-time consumption, savings insights. Thousands of people make energy decisions with it daily. And with every new feature, every new integration, the demands on performance, stability and user experience grow.
You're not here to work through tickets. You're here to take our mobile architecture to the next level, turn complex data into intuitive experiences, and raise the technical bar across the team. When customers say "this app is amazing", it's because of your work.
You're not here to work through tickets. You're here to take our mobile architecture to the next level, turn complex data into intuitive experiences, and raise the technical bar across the team. When customers say "this app is amazing", it's because of your work.
What Success Looks Like (6–12 Months)
Month 3 (Ramp-up)
Month 6 (Performance)
Month 12 (Scale)
- You understand our codebase, architecture and development processes deeply enough to independently plan, build and ship features.
- You've introduced initial technical improvements that measurably improved performance, stability or code quality.
- The team comes to you when it comes to mobile architecture decisions.
Month 6 (Performance)
- You've delivered multiple high-impact features that demonstrably improved user experience and engagement metrics.
- App stability and performance KPIs have measurably improved under your influence: fewer crashes, faster load times.
- You've introduced code or process improvements that increased team velocity or quality.
Month 12 (Scale)
- You're the go-to technical reference for all mobile decisions at RABOT.
- You've evolved the mobile architecture so it remains stable and performant even with significantly more features and users.
- New engineers onboard faster because you've shared knowledge, documented standards and set the bar.
Who we are looking for
- Architect: You don't think in screens, you think in architecture: state management, performance, scalability. You've built and shipped apps you're proud of.
- Quality-driven: Clean code, TDD, CI/CD aren't buzzwords for you, they're daily practice. 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, pair programming, architecture discussions: you share actively and make others better.
- Product thinker: You don't just build what's in the ticket. You understand how customers use the app and bring technical insight into design and product decisions.
- Doer: When you see a problem, you don't wait for a sprint change. You propose a solution and ship it.
Bonus: Hands-on with native iOS/Android development and mobile analytics.
What We Offer
- Impact: You're not building a corporate app that sits in a drawer. Thousands of customers use what you develop every day.
- Ownership: You shape the mobile architecture, not just the implementation. 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
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.