Backend Engineer
Join Lunar and help us redefine banking! We're seeking a talented and experienced Backend Engineer to join our Experience Area in Aarhus and build the customer-facing features that power our app and web platform, directly impacting how our users manage their everyday finances. 🏦
At Lunar, we are democratizing the power of money and changing the way we all bank, pay, and invest. Since starting in Aarhus in 2015, we've grown rapidly and are now a major player in the Nordics, with offices in Copenhagen, Aarhus, and Stockholm 🚀
So, who are we? Are we a tech company or a bank? Well, we're both breaking free from the usual categories. Here, tech isn't just a cool add-on; it's the core of how we do things. With our own banking license, we go head-to-head with traditional banks. What sets us apart is the mix of tech and financial services, giving us the power to shake up a dusty industry that's ready for a change.
As we continue our journey to becoming the best everyday bank in the Nordics, we are looking for a Backend Engineer to develop and maintain core backend services so that we can deliver a seamless and intuitive experience for our users' everyday financial needs. As our new Backend Engineer, you will be part of our Experience Area, reporting to Mathies Christensen. The Experience Area comprises different teams working in Aarhus and Copenhagen, who are focused on building and maintaining the customer-facing features within the app and web platform within the broader Technology function, led by Rolf Njor.
What will you do?
Develop and maintain seamless backend solutions (GoLang, PostgreSQL) for central user-facing products for both private and business users, including budgets, paying bills, daily spend, savings, shared account, child accounts, invest, crypto, and much more.
Design and implement products on a state of the art tech stack (AWS, Docker, GitHub) powered by an event driven architecture that ensures robustness and scalability.
Design and build APIs (HTTP/Swagger, GraphQL) in collaboration with frontend engineers for app and web (Kotlin, Swift, React).
Write comprehensive automated tests for new and existing products to ensure high-quality and fast-paced software delivery.
Monitor products closely using modern observability tools (Grafana, Falcon LogScale, Prometheus) and adapt to system and user data.
Utilize AI (Cursor, Gemini, Claude etc) to improve quality and speed while coding and implement AI into the product where it makes sense.
Collaborate closely with product managers, designers, and data scientists to deliver products that users love.
Curious about the Lunar culture? 💚
Everything at Lunar centers around our core - to challenge. It’s infused into our four values and guides us in how to work together, lead projects, and lead people to reach our mission. Our values aren't just words on a page - they're what make us who we are and shape the vibe of our culture. And trust me, we’re all about the vibe. For a longer read about our culture, click here.
We're excited to welcome everyone to apply for this impactful role! We can’t wait to follow up with talents who we believe are the best fit based on the following criteria:
Around 3-5 years of experience as a Backend Engineer.
Strong proficiency in backend engineering (e.g. GoLang) and experience with event-driven architecture.
Experience with API design and development (e.g. HTTP/Swagger, GraphQL).
Solid understanding of database systems (e.g. PostgreSQL).
A proactive approach to automated testing and monitoring of products.
Excellent communication and collaboration skills, with the ability to work effectively in a cross-functional team with different expertises and competencies.
Experience with AI and understanding of how it benefits software development.
A keen understanding of the intersection between business needs and engineering solutions.
Are you ready to join the journey? Apply now and let’s find out more!
While you hold on tight for us to get back to you, curious to see what we’re up to? Follow us on LinkedIn for business announcements and releases 📢, check out our Instagram for an inside scoop on what it’s like to work here 📸, and visit our blog for the latest tech and product insights! 📱🫰
Depending on the regulations in the country where you will be employed, we will ask to see or obtain information about your criminal record.
- Department
- Technology
- Locations
- Aarhus, Denmark
- Employment type
- Full-time

Aarhus, Denmark
About Lunar
We’re a 100% digital bank that helps you manage your money smarter.
Lunar is designed for you. We’re 100% digital, always accessible and we provide everything you need for your daily economy. That means smarter ways to manage your money, more control, easier investment tools, and no hidden fees.
Welcome to the future of banking.
Lunar was founded in 2015, and since then, we have employed more than 400+ skilled people in: Tech, Design, Business Development, HR, Compliance, Banking, Marketing, Communication, Support, and much more.
The journey is only getting started, this is your cue to join it. Apply now!