Backend Engineer

## About Wolt At Wolt, we create technology that brings joy, simplicity and earnings to the neighborhoods of the world. In 2014 we started with delivery of restaurant food. Now we’re building the delivery of (almost) everything and you’ll find us in over 500 cities in 30 countries around the world. In 2022 we joined forces with DoorDash and together we keep on dreaming big and expanding across the globe. Working at Wolt isn’t always easy, but it’s definitely exciting. Here you’ll learn more, build more, and ship more than in most other companies. You’ll be challenged a lot, but also have a lot of fun on the way. So, if you’re a self-starter with drive and entrepreneurial spirit, this could be the ride of your life. ## Responsibilities - Design, build, and operate backend services that power growth experiments across the consumer app, primarily in Python, Kotlin, and/or Go. - Implement A/B tests, feature flags, and experiment infrastructure that let the team validate hypotheses quickly. - Collaborate closely with Product, Design, iOS, Android, Web, and Data to ship experiments that drive measurable impact on user growth and retention. - Balance speed with quality: write clean, testable code that's easy to ship and easy to remove when experiments conclude. - Drive reliability, observability, and efficiency through automated testing, logging, alerting, and incident response. - Work with a cross-functional team of Backend, iOS, Android, and Web Engineers, working alongside Designers and Data Analysts, all closely partnered with Product. - Collaborate with platform teams and tap into Wolt's engineering community for shared tooling and best practices. ## Requirements - Backend development experience in one or more of the following languages: Python, Kotlin (or modern Java), or Go. - Experience building and operating production services at scale. - Familiarity with databases (PostgreSQL, MongoDB, or similar), RESTful APIs, and CI/CD pipelines. - Comfort with experimentation infrastructure: A/B testing, feature flags, or similar. - A strong ownership mindset, someone proactive, curious, and eager to ship. - A pragmatic approach to quality: you ship fast, encapsulate experimental code properly, and avoid over-engineering. - Excellent collaboration and communication skills in English. ## Nice to Have - Experience in a growth or experimentation-focused team. - Familiarity with Kafka, Redis, or event-driven architectures. - Experience across multiple backend languages. ## Benefits - ✨ Ship and learn fast: See your work in production quickly and let data guide what's next. - 🤝 Collaborate across disciplines: Work shoulder-to-shoulder with Product, Design, Data, and mobile engineers. - 📈 Drive real impact: Your work directly influences user growth and retention metrics. Next steps* This role can be based in Helsinki or Stockholm ONLY. We're reviewing applications as they come in, so if this sounds like your kind of challenge, don't wait too long. We'd love to hear from you. The hiring process typically includes an initial chat with our Talent Acquisition Partner, followed by technical interviews, a team conversation, and final alignment. Feel free to check the Wolt Tech Blog for more about our culture & technology. Our Commitment to Diversity and Inclusion We’re committed to growing and empowering a more inclusive community within our company, industry, and cities. That’s why we hire and cultivate diverse teams of people from all backgrounds, experiences, and perspectives. We believe that true innovation happens when everyone has room at the table and the tools, resources, and opportunity to excel.