Senior Backend Engineer – Lun Energy


We’re looking for a Senior Backend Engineer that will be a part of the early engineering team, defining our tech stack, building the foundation, and going on a journey where what you do makes a real difference in the world.

Decarbonizing homes, faster 🏡

Space heating is 12% of emissions, the same as all personal transportation (i.e., gas-guzzling cars!).

Even worse, 40% of our heating today is centered on natural gas supply. The only way we get rid of both is by installing a lot more heat pumps in the 50 mio+ homes Europe-wide and very quickly. 

The only problem is: 

It’s a complicated and expensive experience to get a heat pump today – and that needs to change.


Building the tech platform that makes it seamless to decarbonize your home 🌍 

We’re building the ultimate pre-installation platform that makes it easy for prominent players (think energy companies, wholesalers, manufacturers) to estimate, configure and model a heat pump deployment in consumers’ homes while reducing the friction that keeps our installers from loving being a green transition hero.

That involves building a platform with:

  • Digital & embedded onboarding flow
  • Automated heat loss calculation
  • Precision price configuration
  • Workflow orchestration
  • Integrated finance/payment
  • Energy/asset management and more


That’s where you come in ☝ ☝ ☝ 

  • Define a new codebase: Build a codebase from a clean slate. You’ll build a system that orchestrates a messy physical world and will scale into adjacent, carbon-reducing domains. 
  • Build what matters: Spend your working hours designing and developing end-to-end solutions that make it seamless to transition to a green home and economy
  • Own your code: You’ll get full responsibility for the code you write but are surrounded by people who are there to help
  • Create a fantastic dev experience: Optimize the developer experience for yourself and your team members, allowing us to move the needle efficiently
  • Establish a technical culture: Establish/promote an honest learning culture built on trust and a growth mindset
  • Help others shine: Constructivelysuggest technical approaches, improve solutions, and perform code reviews with peers so that we can carve the best path forward


Who you’ll be working with 🤝🤝:

  • Martin (CEO): Passionateclimate activist with a background in growth.  Formerly COO at Tomorrow/ElectricityMap and Lix, Uber, and Google. https://www.linkedin.com/in/martincollignon/
  • Anders (COO): Should’ve-been-an-engineer process person.  Formerly Co-Founder/COO of Undo Insurance, before that Rainmaking, Qvartz/Bain https://www.linkedin.com/in/andersvalentin/
  • Michael (Frontend Lead): Product-heavy frontend expert.  Formerly Co-Founder of Fitbay & high-end freelancer (Apple, Novo, Undo, Danske Bank) https://www.linkedin.com/in/michaelwolthers/
  • Jonas (UI Engineer): Systems thinker, designer, and self-taught frontender.  Formerly co-founder of Audacity Interactive and Head of Design at Dawn Health. https://www.linkedin.com/in/jonaskroner/


  • To be successful in the role, you are likely:
  • An experienced backender: You probably have 5+ years of experience working as a software engineer – you’ve worked with Typescript, Go or similar in the backend and have some familiarity with basic DevOps.
  • Passionate about the craft: You take pride in your art and are curious about staying up to date on new technologies and practices. You strive for a balance between tried-and-tested and fresh and shiny.
  • Interested in fighting climate change: We are solving a climate problem, and solving it is our priority. Some of the work we’ll be doing may not be glorious, but it will help our future generations.
  • Work independently, anchored in teamwork: You thrive out of silos and with early collaboration in building products and have opinions on what we are building and why.
  • Naturally good at balancing now and future: What matters to you is the real-life value our stakeholders get from what you are building. You sense when it’s time to pay tech debt and when it can be incurred in the interest of speed. 
  • A sharer and teacher: We want you to bring your experience and how you like to work into the mix so we can create an excellent company together. Similarly, you want to learn from other people’s experiences.
  • Okay with ambiguity: Early startup life is never a straight line. You don’t mind that ambiguity and can see when the structure is required and when it’s in the way.
  • A plus if: You’ve been part of an early startup journey/setting up tech stacks
  • A plus if: You’ve worked with or around workflow/orchestration/process-heavy industries

What you need to do now

If you are interested in this position, please reach out to Recruitment business Partner Martin Gejlsbjerg at +45 3117 9450 or martin@adveniopeople.com. To speed up the process, please attach your CV.

About Lun

The world needs to get rid of fossil fuels in heating our homes for the climate and for energy independence. The only option we have is to massively accelerate heat pump deployment.

Lun builds the software that makes it seamless for consumers, installers and vendors to scale up their heat pump efforts efficiently – and with every heat pump we help deploy reduces carbon emissions by ~1 gasoline car.

We have incredible backers and are building an awesome team motivated by making a difference. If you want to spend your days doing your best work on what matters most reach out!

Are you the candidate we seek?

Then please reach out to:

Martin Gejlsbjerg, Recruitment Business Partner


DK: +45 31 17 94 50

Reach out so we can tell you more