(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 1,000+ 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.

• 🛠️ 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 1000+ 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, coffee, regular team events, MacBook & 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!