Our mission and vision
At 21energy, we aim to fundamentally change the heating industry. Our mission is to create sustainable, energy-efficient and economically viable solutions through the innovative combination of advanced heating technologies with integrated Bitcoin mining. We believe that energy efficiency and financial benefits can go hand in hand. Our vision is to optimise energy consumption and actively shape the energy transition by making good use of surplus energy while opening up new income opportunities for our customers.
Efficiency
We strive to optimise the use of resources and develop energy-efficient solutions that help our customers to save costs and protect the environment.
Sustainability
For us, acting sustainably is not a trend, but a responsibility. We are committed to technologies that reduce our carbon footprint and make a positive contribution to the environment.
Innovation
As pioneers, we combine heating technology with blockchain technology. Our innovative spirit drives us to constantly break new ground and push boundaries.
Future-orientation
We think ahead and design tomorrow's technologies today. Our solutions are designed to create long-term added value and be future-proof.
Open positions
Junior Software Engineer / Working Student (m/f/d)
About us
What started as a Bitcoin heater is becoming the platform for the future of sustainable warmth. 21energy combines energy efficiency, connected technology and smart business models — and is building an exciting product portfolio ranging from stoves and smart central heating to Heating-as-a-Service and scalable container infrastructure. With a team of over 20 in Innsbruck, strategic partnerships with leading energy providers, and the ambition to become Austria’s next unicorn, we are at a turning point. Shape the next chapter with us!
We’re looking for a working student who wants to grow with us. You’ll start with supporting tasks – testing, bug reproduction, smaller fixes, some customer support – and gradually take on more responsibility as you get deeper into our stack. Up for a Bachelor’s or Master’s thesis with us? Very welcome, but not a must.
Your tasks
- Testing – manual tests, bug reproduction, writing automated test suites.
- Customer support – triaging tickets, reproducing issues, solving them yourself.
- Small bugfixes & features – you’ll work your way into our TypeScript/Node stack and gradually own your own tickets.
- Internal tools & docs – things that make all our lives easier.
- Growing with us – with every task you handle well, more responsibility comes your way. Where you are in a year is up to you.
Your profile
Must-haves:
- Enrolled student (from 2nd semester Bachelor’s onwards, Master’s also welcome) – computer science, business informatics, mechatronics or similar.
- First programming experience – from uni, side projects, an internship, or open source. Just show us what you’ve built.
- You’re comfortable on the command line or curious enough to get there. You don’t need to know TypeScript/Node – but you should be keen to learn it.
- You want to understand why something works – not just that it works.
- You work carefully, ask when something’s unclear, and reliably get things done.
- At least 6–12 months available before thesis or full-time – the onboarding pays off for both sides.
- German B2 preferred (for the customer support portion).
What we offer
- Real product, real relevance: You’ll learn from day one on a real product — not a sandbox project, but code that runs at customers’ homes. Energy efficiency meets Bitcoin mining. We are global market leaders in Bitcoin heating systems and growing rapidly.
- AI-first: AI-forward, but no vibe coders. We use the tools that make us faster, but we develop properly. Every new team member completes an AI workshop to get started.
- Team culture: Small team, short paths, open ears. We like making mistakes, but only once each. Flat hierarchies, lots of ownership and flexible working hours. Prospect of a full-time position after graduation.
- Top equipment: Height-adjustable desks, up-to-date technology and modern office right at Landhausplatz in Innsbruck.
- Perks: Training budget up to €3,000/year, €180 in annual vouchers, Klimaticket Tirol (from the 2nd year).
- Community: Monthly game nights at the office, regular team events and “Ask Me Anything” sessions with our CEO Maximilian — deep insights into Bitcoin, financial markets and the energy sector.
- Your own Bitcoin miner: Every desk comes with a Bitaxe — an open-source Bitcoin solo miner. Every 10 minutes, a new block is found on the network, and each time you have a shot at the full block reward of currently 3.125 BTC. The odds? Tiny. But real — several Bitaxe miners have already found blocks and won over €200,000 each. Your personal Bitcoin lottery ticket, 24/7 on your desk.
Conditions
- Location: Wilhelm-Greil-Straße 21, 6020 Innsbruck
- Work model: On-site (office-first, occasional home office possible)
- Working hours: Part-time, 10–20h/week (more possible during semester breaks)
- Compensation: The full-time equivalent gross annual salary for this position is € 35,000 – € 42,000 (14 payments), depending on experience and study progress. Payment is prorated based on actual weekly hours.
Apply now!
Would you like to join our innovative team and actively shape the energy transition? Then send your application (CV with GitHub, side projects, whatever you want to show is welcome, references if applicable) to: hr@21energy.com
We look forward to meeting you! Applications are welcome regardless of gender, origin, age, religion, sexual orientation, or disability.
Software Engineer (m/f/d)
About us
What started as a Bitcoin heater is becoming the platform for the future of sustainable warmth. 21energy combines energy efficiency, connected technology and smart business models — and is building an exciting product portfolio ranging from stoves and smart central heating to Heating-as-a-Service and scalable container infrastructure.
With a team of over 20 in Innsbruck, strategic partnerships with leading energy providers, and the ambition to become Austria's next unicorn, we are at a turning point. Shape the next chapter with us!
To further develop our software stack, we're looking for reinforcement to clear out bugs, simplify our customers' lives, and take our products to the next level of quality.
Your tasks
- Further development of our embedded software stack – TypeScript/Node services run directly on the devices.
- Backend development – TypeScript/Node services, MongoDB, Redis, Kubernetes clusters.
- Third level support – if a problem makes it to us, it's gotten interesting.
- Ownership of features – from idea to release, it's your baby.
- Testing – Manual and automated test suites ensure we can trust our work.
Your profile
Must-haves:
- Solid experience as a software engineer (mid to senior).
- You already have experience with TypeScript/Node and you feel comfortable on a Linux system.
- You write clean, testable code and think in systems, not just functions.
- You work hands-on and independently, and reliably get things done.
- You want to really move a product forward – not just "work through tickets."
- German B2 preferred (for the customer support portion).
Nice-to-have (but not a must):
- Experience with Kubernetes (k3s) is a big plus.
What we offer
- Real product, real relevance: You'll build something people have standing in their homes — energy efficiency meets Bitcoin mining. You'll actively shape product development and play a real role in the company's future. We are global market leaders in Bitcoin heating systems and growing rapidly.
- AI-first: AI-forward, but no vibe coders. We use the tools that make us faster, but we develop properly. Every new team member completes an AI workshop to get started.
- Team culture: Small team, short paths, open ears. We like making mistakes, but only once each. Flat hierarchies, lots of ownership and flexible working hours.
- Top equipment: Height-adjustable desks, up-to-date technology and modern office right at Landhausplatz in Innsbruck.
- Perks: Training budget up to €3,000/year, €180 in annual vouchers, Klimaticket Tirol (from the 2nd year).
- Community: Monthly game nights at the office, regular team events and "Ask Me Anything" sessions with our CEO Maximilian — deep insights into Bitcoin, financial markets and the energy sector.
- Your own Bitcoin miner: Every desk comes with a Bitaxe — an open-source Bitcoin solo miner. Every 10 minutes, a new block is found on the network, and each time you have a shot at the full block reward of currently 3.125 BTC. The odds? Tiny. But real — several Bitaxe miners have already found blocks and won over €200,000 each. Your personal Bitcoin lottery ticket, 24/7 on your desk.
Conditions
- Location: Wilhelm-Greil-Straße 21, 6020 Innsbruck
- Work model: On-site (office-first, occasional home office possible)
- Working hours: Full-time
- Compensation: Gross annual salary € 48,000 – € 55,000 (14 payments), depending on experience and qualification. Placement within the range is based on relevant professional experience, technology expertise and ownership level.
Apply now!
Would you like to join our innovative team and actively shape the energy transition? Then send your application (CV with GitHub, side projects, whatever you want to show is welcome, references if applicable) to: hr@21energy.com
We look forward to meeting you! Applications are welcome regardless of gender, origin, age, religion, sexual orientation, or disability.
1. Ready for the next step?
If our position appeals to you, we look forward to receiving your application by e-mail to hr@21energy.com. As soon as we receive your documents, we will confirm receipt and check them carefully together with the department.
2. First meeting
If your profile fits, we will invite you to an initial video interview (approx. 30 minutes). We can get to know each other and you will get a first impression of our special corporate culture. After the interview, you will have time to think everything over in peace. We will contact you the next day to discuss what happens next.
3. Personal interview
The next step is to get to know your future team leader. In an interview lasting around 60 to 75 minutes, we will talk about your professional qualifications and personal strengths. Together we will find out whether we are a good match. After the meeting, you will receive feedback from us as soon as possible.
4. Trial day with us
We would like to give you the opportunity to get to know us even better and gain an insight into your future working life. On your trial day, you will meet the entire team, can ask all your questions and experience our working methods at first hand. You may also have the opportunity to have lunch together or enjoy a relaxed game of table football. At the end of the day, we will reflect on our impressions together and look forward to your feedback.
What is it like to work with us?
David Stojanovic – Lead Developer
"As a developer at 21energy, I appreciate working on innovative projects and technologies. The teamwork is constructive and supports my professional development. I like being part of a company that is committed to sustainable solutions and the energy transition."
That's us
Florian Gapp – Creative Director
"At 21energy, we foster a culture that emphasises creative ideas and technological excellence, giving our employees the freedom to develop innovative solutions and pursue unconventional ways of thinking.
Our success is built on strong teamwork where we value diverse perspectives, encourage open dialogue and support each other, enabling personal growth and professional development."
We look forward to meeting you!
Your contact: Christine Musch
hr@21energy.com
