Senior Fullstack Engineer, Merchant Platform (EMEA, Hybrid)

Wolt; Helsinki; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

Wolt is seeking a Fullstack Engineer to contribute to merchant-focused products across Europe. You will build production software for backend services and user-facing applications, collaborating with product managers, designers, and operations to translate business needs into practical technical solutions.

Our stack includes Go, Kotlin, TypeScript, and React, with Kafka, PostgreSQL, MongoDB, Redis, AWS, Kubernetes, Docker, gRPC, and modern cloud infrastructure.

Qualifications

• AI-first mindset and strong software engineering principles.
• Experience building production software end-to-end (backend, frontend or fullstack).
• Strong expertise in at least one stack area and willingness to contribute elsewhere.
• Experience with modern backend languages (Go, Kotlin, Java) or modern frontend tech (TypeScript/React).
• Good understanding of APIs, databases, testing, and software design fundamentals.

Responsibilities

• Build and maintain production software across backend services and user-facing applications.
• Work on merchant onboarding, analytics, recommendations, menu and order management, integrations, or merchant-facing tools.
• Develop reliable APIs, data models, services, and user-facing features.
• Collaborate with product managers, designers, operations, and engineers to turn business needs into solutions.
• Own features from implementation through production and maintenance.
• Contribute to technical design discussions to improve scalability and observability.

Skills

AI-first mindset

Fullstack engineering

Backend expertise

Frontend expertise

API design

Tools

Kafka

PostgreSQL

MongoDB

Redis

AWS

Kubernetes

Docker

gRPC

TypeScript

React

Job description

Wolt is seeking a Fullstack Engineer to contribute to merchant-focused products across Europe. You will build production software for backend services and user-facing applications, collaborating with product managers, designers, and operations to translate business needs into practical technical solutions.

Our stack includes Go, Kotlin, TypeScript, and React, with Kafka, PostgreSQL, MongoDB, Redis, AWS, Kubernetes, Docker, gRPC, and modern cloud infrastructure.