Senior Kotlin Backend Engineer, Merchant Integrations

  • Germany
  • negotiable combination of monthly pay and doordash rsus


Company Description

Wolt is a Helsinki-based technology company that provides an online platform for consumers, merchants and couriers. It connects people looking to order food and other goods with people interested in selling and delivering them. To enable this, Wolt develops a wide range of technologies from local logistics to retail software and financial solutions – as well as operating its own grocery stores under the Wolt Market brand. Wolt’s products include Wolt+ (subscription service for customers), Wolt for Work (meal benefits and office deliveries for companies), Wolt Drive (fast last-mile deliveries for merchants) and Wolt Self-Delivery (service for merchant partners with their own delivery staff). Wolt’s mission is to make cities better by empowering and growing local communities. Wolt was founded in 2014 and joined forces with DoorDash in 2022. DoorDash operates in 29 countries today, 25 of which are with the Wolt product and brand.

Working in Product Development at Wolt

At Wolt, we’re about getting things done. You’ll probably enjoy it here if you like taking ownership, developing yourself and being around friendly, humble and ambitious people. 

The behind the scenes of Wolt is run by an awesome bunch of over 700+ planners, builders, designers and data crunchers. We call ourselves Product+, as we’re the very core of Wolt’s products, tools and platforms. To build our products, we work in over 60  cross-functional, independent and autonomous teams. Teams are made up of a mix of talented individuals: engineers, designers, data scientists, analysts, and product leads. Each team takes ownership for solving customer problems in the best possible way.

Our Commitment to Diversity, Equity & Inclusion

We want to have all sorts of people in our team – people like you and me, and people different from you and me. To be able to work with diverse teammates – when it comes to gender, age, ethnicity, life background, sexual orientation, political views, religion, or any other personal trait – we consciously aim to offer equal opportunity for everyone to work with us. This is because we believe diverse teams make the most thought-through decisions and build things in the most inclusive way.

Join us today to build Wolt together.


Job Description

Running a restaurant or a store while fulfilling delivery orders is hard work that can be made easy with automation. This is where our integration platform comes in. We help our merchant partners automate the manual work with our API and integration offerings. Once a merchant has these integrations in place, their staff are free to do what they do best – service consumers without being bogged down by mundane, repetitive, and error prone manual processes.

Through our API platform, we ensure that the experience for our partners is best in class, making it a breeze to work with Wolt. Be it orders going to POS (Point of Sale) systems automatically, venue management, item & inventory control, menu & catalog automation, our teams have our merchants covered!

As our new Kotlin Backend Engineer, you will be joining one of our Core API teams to make sure that we continue building integration products that delight our partners when managing their daily operations.

Cool stuff about the teams in Merchant Integrations:

🏆 Ownership: We handle the whole development process (business logic, testing, database & data streaming, CI/CD, analytics, cloud) ourselves in an autonomous manner. Don’t worry, we’re not alone: We have support from central teams when we need help.

🔬 Technology: We use state of the art tools and technologies, and we’re open to new ones! Current stack in use: Kotlin, MongoDB, Kafka, GitHub Actions, AWS, Docker and Kubernetes.

👊 Autonomy: We make the decisions as a team and group of teams for our ways of working and we take architectural decisions together. Everyone plays a role in our future.

📈 Growth: There is a lot of room for learning, teaching and growing together. You will be getting personally tailored career growth opportunities to unleash your full potential, we know that everyone is unique.

💻 Flexibility: You can choose whether you want to work from home, from the office or hybrid. It’s up to you, we don’t monitor people. 

🤝 Diversity: We have different people with different backgrounds. Cultivating diversity and maintaining different opinions is the key to our success.    

🔥 Impact: Want to see the impact of your work? We provide our merchants with innovative tools and systems to become more and more efficient and successful, and with that our customers would also get a better experience when ordering with Wolt. We simply make it win-win for everyone!

📍This role can be based in one of our tech hubs in Helsinki, Berlin or Stockholm, or you can work remotely anywhere in these countries. Read more about our remote setup here. If you live outside of these countries – please let us know your preferred location(s) with your application. 


Hands-on: We are looking for people who have strong experience building high-quality software. This can include working with Apps, APIs and integrations, handling the whole development cycle all the way to production. Having said that, seniority at Wolt is measured by skills, not the number of years on your CV.

Skilled: We want you to be proficient with JVM on the backend. We use Kotlin but find expertise in other JVM backend languages like Java and Scala genuinely relevant as a starting off point for learning Kotlin, which is our main backend programming language.

Communicator & collaborator: We work closely with our teammates and having a good connection with team members is essential. We understand that everyone has their own unique way of communicating with others. We expect you to be yourself, express your opinions, and work together with the rest of the team.

Additional Information

The position will be filled as soon as we find the right person, so make sure to apply as soon as you realize you really, really want to join us!

The compensation will be a negotiable combination of monthly pay and DoorDash RSUs. The latter makes it exceptionally easy to be excited about our company growing and doing well, as you’ll own a piece of the pie.

For any further questions about the position, you can turn to Product+ Talent Acquisition Partner – Michal (


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