Software Engineering Intern (AI x Greentech) (m/f/d)
Job description
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
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 AI operating system for renewable installers. Backed by top-tier investors and trusted by 3000+ business customers, we’re growing fast - and we need YOU to help us accommodate our new and existing customers.
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