Wolt is looking for a Senior Backend Engineer to join our Personalisation Team, who is responsible for creating a personalized experience on the consumer-facing components of Wolt.

The Personalization Team plays a unique role within the engineering teams at Wolt as we directly influence what and how content is shown to Wolt users on the client apps! Backend Engineers, Data Scientists and Machine Learning Engineers work hand in hand to develop and deploy machine learning models, design and run experiments, monitor performance and continuously improve the ranking quality. This ensures our customers find the content they look for in all markets we operate. Our machine-learning models are mostly built from scratch and are highly customised for our use case! 

Hence, as part of the responsibilities, you’ll be working with our team’s Data Scientists and Machine Learning Engineers to extend and continuously improve our backend services, help the team to integrate new Machine Learning-based solutions into our infrastructure and Python backend, as well as build customer-facing A/B tests, all while maintaining and continuously improving the scalability and robustness of our systems. For example, one of our recent projects is a re-implementation of our core ranking algorithm to improve the customer experience; this includes scaling the model to multiple markets, deploying it to a modern machine learning infrastructure, and AB-Testing it within the client apps.

We have a strong Python community at Wolt (check out our Wolt Tech Talks Youtube channel and our engineering blog) - modern Python (FastAPI, gRPC, usage of type hints) is our bread and butter. But we are not limited to Python; Wolt has a fantastic sharing and learning culture, and everyone is invited to learn, share best practices and choose the best technology for the job. 

This role can be based in one of our tech hubs in Helsinki, Berlin or Stockholm, or you can work remotely anywhere in Finland, Sweden, Germany, Denmark, and Estonia. Read more about our remote setup here. If you live outside of these countries - not to worry! We provide relocation support to help you make your way to Finland, Germany or Sweden.

The team writes mainly Python (Flask, gRPC), and we expect you to have a strong professional background in building backend services using Python (or similar technologies) and delivering modern, extensible and maintainable code. Our backend is powered by Kubernetes in AWS, so proficiency in similar platforms is a huge plus. Furthermore, having experience or exposure to machine learning, though it is not a requirement, would definitely be beneficial for the job.

Aside from technology, we expect you to be a product-oriented problem solver, a good communicator, willing to collaborate with people in- and outside of your own team, and keen to bring up issues in a constructive manner to the team and to Wolt at large. We work with high ownership in small teams where each team member works around the whole software development life cycle. Every one of our product team members has a say in where we are going and what solutions we implement.

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 equity. 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.

If you want to check up on your application or have any further questions about the position you can turn to Talent Acquisition Partner, Severi Kausola, at severi.kausola(at)wolt.com at any given time.