Senior Fullstack Engineer - Merchant EMEA

Wolt Oy; Helsinki; On-site; EUR 80,000 - 120,000; Full time

Job summary

Wolt Oy in Helsinki (Hybrid) is seeking an experienced software engineer to join our Merchant EMEA Engineering team. You will build and maintain production software across backend services and user-facing applications, focusing on onboarding, analytics, recommendations, and integrations.

You should have proven experience in backend, frontend, or fullstack development, strong knowledge of Go, Kotlin, Java, or TypeScript/React, and a solid grasp of APIs, databases and testing.

Qualifications

• Proven experience building production software in backend, frontend, or fullstack.
• Strong expertise in at least one stack area (backend or frontend).
• Experience with Go, Kotlin, Java or TypeScript/React.
• Good understanding of APIs, databases, testing, and software design fundamentals.
• Ability to work independently and collaborate with teams.
• Strong communication and pragmatic mindset.

Responsibilities

• Build and maintain production software across backend services and user-facing applications.
• Develop APIs, data models, services, and features.
• Collaborate with product managers, designers, operations, and engineers to translate business needs into technical solutions.
• Own features from implementation through production and maintenance.
• Contribute to design discussions and improve scalability, observability, maintainability.
• Utilize AI-assisted development tools effectively and assess output critically.
• Be willing to work outside primary area to solve end-to-end problems.

Skills

AI-first mindset

Production software development

Backend/Frontend/Fullstack experience

Go

Kotlin

Java

TypeScript/React

APIs

Databases

Testing

Software design fundamentals

Independent and collaborative work

Communication

Tools

Kafka

AWS

Kubernetes

Docker

Job description

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.

About the Team:

Merchant EMEA Engineering builds the technology that helps merchants join, grow, and operate successfully across our markets. Our organization brings together the strengths of Wolt and Deliveroo and supports merchants across 37 countries. We work across the merchant journey, including onboarding, business growth and support, analytics and recommendations, menu and order management, integrations, and merchant applications. Our teams sit close to the business. Rather than primarily building foundational platforms, we build products and features on top of our existing platforms to solve real merchant and market needs, including local business requirements, growth opportunities, and operational challenges. This open role is based in our tech hubs in Helsinki or Berlin.

What Youll Do:

• Build and maintain production software across backend services and user-facing applications.
• Work on areas such as merchant onboarding, analytics, recommendations, menu and order management, integrations, or merchant-facing tools.
• Develop reliable APIs, data models, services, and user-facing features.
• Collaborate closely with product managers, designers, operations, and other engineers to turn business needs into practical technical solutions.
• Own features from implementation through production and ongoing maintenance.
• Contribute to technical design discussions and improve the quality, scalability, observability, and maintainability of our systems.
• Use AI-assisted development tools effectively as part of your engineering workflow, while critically evaluating their output and taking ownership of the final solution.
• Be willing to work outside your primary area of expertise when needed to solve the problem end-to-end.

How We Work:

Ownership, Collaboration, Pragmatism, Flexibility. Our Tech Stack: Go and Kotlin (backend), TypeScript and React (frontend), Kafka, PostgreSQL, MongoDB, Redis, AWS, Kubernetes, Docker, gRPC, modern cloud infrastructure.

Our Humble Expectations:

• AI-first mindset; proven experience building production software in backend, frontend, or fullstack; strong expertise in at least one area of the stack; experience with a modern backend language such as Go, Kotlin, Java, or similar, and/or TypeScript/React; good understanding of APIs, databases, testing, and software design fundamentals; ability to work independently and collaborate; good communication and pragmatic mindset.

You don’t need to excel in both frontend and backend; we welcome different balances of experience. What matters most is delivering across boundaries.

Nice to Have:

• Merchant-facing or internal tools;
• Analytics, recommendations, or decisioning systems;
• Grocery/retail/restaurant/logistics/marketplace tech;
• Integrations;
• Kafka;
• Cloud infra such as AWS/Kubernetes/Docker.

Why Join Us?

You’ll work on products that affect how merchants interact with Wolt Deliveroo and DoorDash across Europe, with a broad scope near the business and opportunities to work on meaningful problems across the merchant journey.

Diversity & Inclusion:

We’re committed to growing a more inclusive community within our company, industry, and cities, hiring diverse teams from all backgrounds and perspectives.