Senior Platform Engineer - Event Streaming & Kafka Backbone

Wolt; Helsinki; On-site; EUR 90,000 - 120,000; Full time

Job summary

Wolt in Helsinki is seeking an experienced Platform Engineer to join the Event Streaming team. You’ll help design, build and operate the Kafka-based infrastructure that powers critical workflows across Wolt, Deliveroo and DoorDash.

This role sits at the intersection of Platform and Reliability Engineering, requiring deep expertise in distributed systems, Java/Go/Python, and modern automation. You’ll collaborate with SRE, Data Platform and Caching teams to evolve our streaming platform at scale

Qualifications

• Experience building or operating distributed systems in production.
• Deep experience with Kafka or similar event streaming systems in production.
• Strong coding in Java/Go/Python for reliable, production-grade systems.
• Experience operating scalable production infrastructure with debugging and reliability improvements.
• Strong understanding of infrastructure automation, observability, capacity management, and operational excellence.
• Good fundamentals in Linux, networking, and JVM-based systems.
• Strong communication skills to work across platform, infrastructure and product teams.

Responsibilities

• Design, build and operate large-scale event streaming infrastructure that supports production workloads.
• Improve the reliability, scalability, observability and automation of Kafka, Event Bus and related streaming components.
• Debug complex distributed systems latency, performance bottlenecks, capacity constraints.
• Build infrastructure automation and self-healing capabilities that reduce operational toil and improve platform resilience.
• Contribute to the team’s 24/7 On‑call rotation and incident response, and drive continuous improvement through pre‑mortems, operational readiness checklists and post‑mortem action items.
• Partner closely with other teams within Storage organization and wider Core Infrastructure org, like SRE, Data Platform, and Caching teams across EU and US regions — including occasional collaboration in the EU evening hours.
• Shape the long‑term architecture and evolution of our event streaming platform, contributing to RFCs and technical strategy.

Skills

Distributed systems

Kafka

Java/Go/Python

Linux

Observability

Networking

Communication

Tools

Kafka

Redpanda

Pulsar

Cruise Control

Job description

Wolt in Helsinki is seeking an experienced Platform Engineer to join the Event Streaming team. You’ll help design, build and operate the Kafka-based infrastructure that powers critical workflows across Wolt, Deliveroo and DoorDash.

This role sits at the intersection of Platform and Reliability Engineering, requiring deep expertise in distributed systems, Java/Go/Python, and modern automation. You’ll collaborate with SRE, Data Platform and Caching teams to evolve our streaming platform at scale