Kotlin Backend Engineer – Merchant Group

Stack

Responsibilities

• ▹Build production-level microservices in Kotlin and Go that help merchants succeed
• ▹Design, build, and scale reliable systems that power merchant experiences
• ▹Work across the full development lifecycle, from business logic and testing to cloud infrastructure and data streaming
• ▹Collaborate on architecture and technology choices that keep systems simple, scalable, and efficient
• ▹Grow skills and knowledge by working alongside experienced teammates in an environment that values learning and experimentation

Requirements

• ▹Experienced software engineering background with a strong track record building scalable microservices
• ▹Kotlin as the primary language; experience with Java, Scala, or other JVM backend languages is a plus
• ▹Confidence in learning and teaching new technologies (e.g. Go)

Nice to have

• ▹Experience with Go
• ▹Familiarity with the tech stack: Ktor, Koin, Spring, gRPC, PostgreSQL, MongoDB, Kafka, Redis, GitHub Actions, AWS, Docker, Kubernetes

Soft skills

About the company

Wolt creates technology that brings joy, simplicity and earnings to the neighborhoods of the world, part of the DoorDash family since 2022. The Merchant Group consists of 150+ engineers across 25+ cross-functional teams helping merchants grow their businesses and streamline operations. This role is based in Berlin, Helsinki or Stockholm.