Senior Fullstack Engineer – Merchant Platform (EMEA, Hybrid)

wolt; Helsinki; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Wolt is seeking a Fullstack Engineer to build production software across backend and frontend, collaborating with product, design, data, and operations. You’ll own features end-to-end and contribute to APIs, data models, and scalable systems.

Based in Helsinki on a hybrid basis, you’ll work with Go/Kotlin on the backend and TypeScript/React on the frontend, applying an AI-first mindset to deliver practical solutions across the merchant journey in Europe.

Qualifications

• Proven production software experience in backend, frontend, or full-stack.
• Strong API, database, testing, and design fundamentals.
• Able to work independently on scoped problems.
• Excellent communication and collaborative mindset.

Responsibilities

• Build and maintain production software across backend services and user-facing apps.
• Develop APIs, data models, services, and features.
• Collaborate with product, design, operations, and other engineers.
• Own features from implementation to production and maintenance.

Skills

AI mindset

Backend development

Frontend development

API design

Go

Kotlin

TypeScript

React

Tools

Kafka

PostgreSQL

MongoDB

Redis

AWS

Kubernetes

Docker

gRPC

Job description

Wolt is seeking a Fullstack Engineer to build production software across backend and frontend, collaborating with product, design, data, and operations. You’ll own features end-to-end and contribute to APIs, data models, and scalable systems.

Based in Helsinki on a hybrid basis, you’ll work with Go/Kotlin on the backend and TypeScript/React on the frontend, applying an AI-first mindset to deliver practical solutions across the merchant journey in Europe.