Software Engineer - Fullstack (SaaS, Greentech) (m/f/d)

Department: Engineering

Location: Berlin

Employment Type: FullTime

Are you passionate about software development AND renewable energy?

Do you thrive in fast-paced, hard-working and purpose-driven environments? If you're ready to take ownership and to use your skills to contribute across our feature rich frontend that changes the world for the better, then look no further - we want YOU!

Please note this is a full-time, on-site position based in Berlin.

What you will do

• Contribute to Frontend Development: Work on our B2B SaaS products primarily contributing across our feature rich frontends.

• Create Beautiful Interfaces: Build intuitive, responsive components using React, TypeScript, and Tailwind CSS on the frontend.

• Deliver World-Class UX: Participate in the creation of world class User Experiences for our market.

• Collaborate with Product & Design: Contribute to the overall look and feel of the web application alongside Product and Design team.

• (Optional) Broaden Your Scope: Depending on your interests and experience, there’s room to get involved with:

  • Node.js backends

  • Database design and queries (especially SQL and a tiny bonus if you love PostgreSQL!)

  • Integrating with Prisma ORM

  • Or even dabbling in Rust (not required, but a huge bonus if you’re curious)

  • Familiarity with GraphQL is considered to be a big plus!

What Makes You a Great Fit

• Hands-On Experience: 1+ year of software development, ideally in a startup or product-driven environment.

• Passion for Renewables: Genuine interest renewable energy (we ask for context here).

• Self-Starter Energy: Self-starter mindset to be responsible for your own learning.

• Ownership: We're a small team, so everyone has to be an owner. Taking accountability and ownership is baked into our DNA.

• Drive: We value conscientious people, we work hard and we play hard.

• Product mindset: You enjoy delighting your customer.

• Bonus Point: Side projects, OSS or notable achievements outside of "work".

Why Join Us?

• Be part of one of the fastest growing VC-backed startup in Germany with 2000+ satisfied B2B customers.

• A vibrant, collaborative office culture where great ideas happen face-to-face — we're a full in-person team (5 days/week) in a beautiful Berlin office near Hackescher Markt.

• Enjoy opportunities for personal and professional growth.

• Embrace the freedom to innovate and make quick changes in a dynamic team.

• Perks include gym membership, coffee, regular team events, MacBook and more.

• Receive competitive pay.

Even if you don’t meet every requirement, we encourage you to apply! Imposter syndrome shouldn't hold you back—we value talent and passion above all.

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 2000+ business customers, we’re growing fast—and we need YOU to help us accommodate our new and existing customers.