Build the Operating System of the Energy Transition

Most internships have you sitting in meetings, fixing small bugs, and watching others build.

This one doesn't.

At Reonic, you'll work on software used by thousands of renewable energy companies across Europe. You'll ship real features, solve real problems, and see your code in production within days.

We're building the AI-native operating system for renewable installers. And we're looking for ambitious builders who want to learn fast, take ownership, and make an impact from day one.

This is a full-time, on-site internship based in Berlin.

What makes this internship different

• Your work directly impacts how renewable energy gets deployed

• You'll ship production code used by real customers

• You'll work closely with experienced engineers, product managers, and founders

• You'll own projects instead of shadowing others

• You'll see the full lifecycle: idea → implementation → customer feedback

• No busy work. No "intern projects" disconnected from reality.

Just building, learning, and shipping.

What you'll build

• Develop product features across our React, TypeScript, and Node.js stack

• Turn complex business workflows into simple and intuitive user experiences

• Work on AI-powered workflows that help installers sell and deliver renewable energy projects faster

• Contribute to backend services, APIs, and internal tooling

• Debug, improve, and optimize production systems

• Collaborate closely with product and design to bring ideas to life

And if you're eager to go deeper:

• Work with databases and PostgreSQL

• Learn about system architecture and scalability

• Explore AI integrations and automation workflows

• Take ownership of larger features end-to-end

This is not a typical internship.

It's a playground for builders.

You'll thrive here if you...

• Love building things and seeing them used by real people

• Are curious and learn quickly

• Prefer ownership over detailed instructions

• Enjoy solving problems, not just writing code

• Care about creating great user experiences

• Want to work with ambitious people who move fast

• Are studying Computer Science, Software Engineering, or a related field

Previous startup experience is a plus, but not required.

What matters most is your ability to learn, execute, and take ownership.

Why join now

• Competitive internship compensation

• High ownership from day one

• Steep learning curve and rapid personal growth

• Uber Eats and Uber rides on us when you finish late

• Regular team events, great coffee, and a MacBook

• 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.

• Join one of Germany's fastest-growing VC-backed startups

About Reonic

At Reonic, we're building the AI-native operating system for renewable installers.

We're replacing fragmented tools across CRM, design, proposals, project management, and invoicing with a single integrated platform that supports installers across the full project lifecycle.

Today, more than 3,000 companies across 13 countries use Reonic, and we're just getting started.

We're a well-funded VC-backed startup reshaping how the world uses energy. We move fast, think big, and build products that create lasting impact.

If that sounds exciting, we'd love to hear from you.