Fullstack Software Engineer (m/f/d)

About the role

Reonic is looking for a passionate Fullstack Software Engineer to join its Berlin office. You will help build and enhance B2B SaaS products that enable renewable energy technologies such as solar, storage, and heat pumps.

Key responsibilities

• Develop and maintain feature‑rich front‑end applications using React, TypeScript and Tailwind CSS.
• Collaborate with product and design teams to create intuitive, responsive user interfaces.
• Contribute to back‑end services with Node.js, design SQL queries and work with PostgreSQL via Prisma ORM.
• Optionally explore Rust and GraphQL integrations to broaden the product stack.

Required profile

• At least 1 year of hands‑on software development experience, preferably in a startup or product‑focused environment.
• Strong interest in renewable energy and a self‑starter attitude.
• Ownership mindset and ability to work autonomously within a small team.
• Demonstrated passion for delivering high‑quality user experiences.

Required skills

• React
• TypeScript
• Tailwind CSS
• Node.js
• SQL
• PostgreSQL
• Prisma ORM
• Rust (optional)
• GraphQL (preferred)

What we offer

• Dynamic, VC‑backed startup environment with 2000+ B2B customers.
• Fully onsite, collaborative office near Hackescher Markt.
• Gym membership, coffee, regular team events, MacBook and other perks.
• Opportunities for personal and professional growth.