Senior Software Engineer - Rules Platform

We're looking for a Senior Backend Engineer to join our Rules Platform team (Risk & Control Tooling) in Tallinn.

The team builds and maintains the shared infrastructure that enables teams across Wise — including Fraud, AML and KYC — to create, execute and manage risk assessments and controls.

Our goal is to make risk assessments fast, reliable, scalable and easy to integrate, while ensuring that the systems protecting our customers remain consistent and maintainable as Wise grows.

You'll work on complex backend challenges involving distributed systems, shared Engineering components (internal libraries), data consistency and platform reliability, with the opportunity to influence technical decisions and help shape the future of the platform.

What you'll be working on

• Building and evolving our Rules Platform, developing reliable, scalable backend services and reusable internal libraries used by multiple Engineering teams.
• Driving technical design and architecture decisions for complex distributed systems where performance, reliability and data consistency are critical.
• Improving platform performance and reliability, monitoring service-level objectives (SLOs), identifying bottlenecks and driving improvements.
• Collaborating across teams, working closely with Product Managers and Engineers to understand their needs, prioritise improvements and make the platform easier to use and extend.
• Taking ownership of meaningful Engineering initiatives, from identifying problems and evaluating trade-offs through to implementation and delivery.
• Supporting Engineering excellence, contributing to technical discussions, code reviews and mentoring other engineers.