Staff Engineer, Feature Engineering Platform

Wolt; Helsinki; On-site; EUR 60 000 - 85 000; Full time

Job summary

A leading technology and delivery company in Helsinki is seeking a Staff Engineer to lead the design and evolution of its Feature Engineering Platform. The position requires proven experience in designing complex software platforms and expertise in backend systems and ML production. Candidates with strong skills in Golang or Python are encouraged to apply. The company values diversity and inclusion, fostering a collaborative environment for all employees.

Qualifications

• Proven experience designing and scaling complex software, data or, ML platforms.
• Deep expertise in backend systems, APIs, and orchestration.
• Track record of shaping developer-facing interfaces or platforms.

Responsibilities

• Design and drive architecture for a unified feature engineering experience.
• Partner with UX and ML practitioners for high-leverage abstractions.
• Mentor and uplift a team of engineers across different levels.

Skills

Design and scale complex software platforms

Production ML and feature stores

Backend systems and APIs

Golang and Python

Developer-facing interfaces usability

Tools

Spark

Flink

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 role

We’re looking for a Staff Engineer to join the ML Platform organization and lead the design and evolution of our Feature Engineering Platform. This team owns the foundational layer that connects data and ML workflows, and is central to our mission of making machine learning development seamless, accessible, and production-ready across the company.

As a Staff Engineer, you’ll shape the architecture and vision of a platform that enables users — from analysts to applied scientists — to explore, engineer, and deploy features with confidence and speed. You’ll work at the intersection of data infrastructure, developer experience, and ML operations, building systems that abstract complexity while ensuring scale, reliability, and strong user ergonomics.

What you’ll be doing

• Design and drive the architecture for a unified feature engineering experience across batch, streaming, and online contexts.
• Partner closely with UX, product-minded engineers, and ML practitioners to craft high-leverage abstractions.
• Lead cross-cutting initiatives spanning dev environments, notebook integrations, data orchestration, and serving pipelines.
• Embed platform reliability, observability, and data quality into the development lifecycle by default.
• Mentor and uplift a team of engineers across different levels and domains.

Our humble expectations

• Proven experience designing and scaling complex software, data or, ML platforms.
• Experience in production ML, feature stores, high scalable services.
• Deep expertise in backend systems, APIs, and orchestration — bonus for exposure to Spark, Flink, or streaming data stacks.
• Previous experience in Golang (or compile languages) and Python.
• Track record of shaping developer-facing interfaces or platforms with attention to usability and iteration speed.
• Comfort leading technical strategy and aligning cross-team efforts.

Our Commitment to Diversity and Inclusion

We’re committed to growing and empowering a more inclusive community within our company, industry, and cities. That’s why we hire and cultivate diverse teams of people from all backgrounds, experiences, and perspectives. We believe that true innovation happens when everyone has room at the table and the tools, resources, and opportunity to excel.