Kotlin Backend Engineer — Scale Retail Microservices

Wolt; Helsinki; On-site; EUR 70,000 - 110,000; Full time

Job summary

Wolt is hiring experienced Software Engineers for the Global Retail group in Helsinki. You will shape how customers discover, browse, and buy retail products across Wolt, DoorDash and Deliveroo, focusing on scalable microservices and JVM-based tech.

You’ll work on Kotlin and Go services in a complex multi-team environment, contributing to architecture, data streaming, and cloud infrastructure, while balancing ownership with collaboration and growth opportunities.

Qualifications

• Strong background in building scalable microservices.
• Experience with Kotlin; familiarity with Java/Scala or other JVM languages is a plus.
• Proficiency in designing, building and operating cloud-based services.

Responsibilities

• Design, build, and scale reliable systems powering Retail experiences.
• Work across the full development lifecycle from business logic to cloud infrastructure.
• Collaborate on architecture and technology decisions to keep systems simple and scalable.
• Grow skills by collaborating with experienced teammates in a culture of learning.

Skills

Kotlin

Go

Java

Scala

Microservices

Cloud

Tools

Kafka

PostgreSQL

MongoDB

Redis

Docker

Kubernetes

AWS

GitHub Actions

Job description

Wolt is hiring experienced Software Engineers for the Global Retail group in Helsinki. You will shape how customers discover, browse, and buy retail products across Wolt, DoorDash and Deliveroo, focusing on scalable microservices and JVM-based tech.

You’ll work on Kotlin and Go services in a complex multi-team environment, contributing to architecture, data streaming, and cloud infrastructure, while balancing ownership with collaboration and growth opportunities.