Backend Developer - Stockholm

Be a part of the next big thing
Do you thrive on tackling complex challenges? Are you passionate about creating impactful solutions that drive commerce forward? Are you someone who believes in encouraging and elevating those around you?
About us
Kustom, formerly known as Klarna Checkout (KCO), is the Nordic market leader in digital checkout solutions. Today, we support over 24,000 merchants across more than 170 countries, providing a streamlined checkout experience. We offer localized solutions in 18 markets, tailored to specific languages, currencies, and payment methods. No matter where your business operates, we deliver a checkout experience that meets the needs of both merchants and shoppers—driving growth globally. 🌍
The role
This position offers a unique and exciting opportunity to take on advanced technical and business challenges in collaboration with talented peers as part of a cross-functional Agile team. By joining Kustom, you’ll have the chance to create great digital products that make a real difference in people’s lives and support the success of millions of merchants around the world. You'll be part of a dedicated team committed to delivering top-tier payment experiences for users and their customers on a global scale.
Things you'll be doing
Focus on growing your skills while delivering high-quality solutions to our users
Work as part of a team, actively participating in planning, refining, delivering, and reviewing sprint progress
Collaborate closely with Product and Design teams to fully understand context, requirements, and vision

Skills and experience you'll need
At least 3 years experience in Backend development, particularly with Java
Familiarity with frameworks such as Springboot
Basic understanding of cloud services, especially AWS
Experience with relational databases and data storage solutions
Competence in using Git and GitHub for version control and team collaboration
A solid grasp of RESTful APIs and how they function

We believe you'll thrive in this role if you have
A passion for Backend Engineering and a proactive, positive mindset
A desire to learn and improve, with an enthusiasm for developing new skills
Curiosity and energy that drive you to create exceptional user experiences
Confidence in sharing your knowledge while being open to feedback and learning from peers
A genuine commitment to delivering fantastic outcomes for users

Benefits
Comprehensive benefits package tailored to support your well-being and financial security
Robust pension plan with national and occupational components
Excellent health insurance coverage, including long-term illness protection and salary exchange options
Flexible work model with 2 days per week at home and 3 days per week in our vibrant office ✌️
Annual wellness allowance of 3,000 SEK to invest in your health and fitness
Extra day off when major holidays (e.g., Christmas Eve, New Year's Eve) fall on weekends
Continuous learning opportunities and professional development support

A place to grow
At Kustom, you’re not going to be just another face in the crowd. This is a place where we elevate each other and celebrate success as a team. We believe in our ability to create excellence — and have fun doing it!
And we know we set high expectations, but we also know that the road to success isn’t a straight line. We support and encourage each other to try, to fail, to try again. Because that’s how we grow, individually and together.
Does this sound like the place for you?
About your application
Please apply in English. At Kustom we welcome everyone! We don’t care where you’re from, whom you love, what kind of food is your favorite (well, unless we’re having a celebration together, then we’ll have to know 😉!), if you believe in this or in that - everyone is welcome!
Giving the above, we treat all candidates the same! That’s why we have this awesome recruitment tool to keep track of all the amazing talents that apply - so please; apply through the system and we’ll make sure to keep you updated along the recruitment process. And be noticed that we can’t keep track of all CV’s and likewise via email. 🙌
We value your privacy! When you apply, we'll handle your data with care. Want to know more about how we use your information? Check out our FAQs at the bottom of the jobs page - we've got all the details there for you!