(Senior) Software Engineer - Backend (m/f/d)

About Reonic 🌱At Reonic, we’re on a mission to simplify renewable technology with our B2B SaaS solutions for solar, storage, and heat pumps. Backed by top-tier investors and trusted by 1,400+ business customers, we’re looking to extend our engineering team with a Backend Developer—and we need YOU to help us build a team that drives this mission forward. What you will do ✨🛠️ Backend Development: Design and implement robust, scalable backend solutions in TypeScript for our B2B SaaS platform, driving key product features and integrations.☁️ Cloud Infrastructure: Work on fully automated solutions to ensure reliable continuous integration using GitHub Actions and fully automated deployment to AWS.🗄️ Database Administration: Monitor the health of our PostgreSQL systems, identify performance issues and implement solutions. What Makes You a Great Fit ✅🛠 Proven Expertise: 4+ years of experience in backend software engineering and server-side technologies, preferably in a startup or fast-paced environment.🧠 Technical Excellence: Write clean, maintainable code and documentation.🧰 Tech Stack Alignment: Knowledge of Node.js, TypeScript, PostgreSQL, GraphQL and Docker.🌟 Nice to Have: Experience with AWS or cloud infrastructure tools.📈 System Operations Awareness: Understanding of automated deployment, observability and performance factors.🌱 Renewable Enthusiasm: A genuine interest in clean energy solutions and sustainability.🌈 Bonus point: Open-source contributions or other personal achievements in the tech community. Why Join Us?🚀 A pivotal role in a fast-growing VC-backed startup building a product already loved by 1400+ paying B2B customers🌍 Be part of a fast-growing company that’s making a tangible impact in the renewable energy sector🧩 Nothing is set in stone - You get to shape your workplace📚 Learning new things is part of your job💰A competitive salary package🏋️ ♂️ Perks include gym membership subsidy, coffee, regular team events & more Location 📍This is a full-time, in-office position. Our Berlin office is located at Alexanderplatz, with an additional office in Augsburg for those located in the southern part of Germany. 🔗 Ready to shape the future of renewable energy? Apply now!If you're a talented, ambitious Backend Engineer with a passion for clean energy, we want to hear from you!