Senior Backend Engineer – Account Insights (Java/Spring)

Wise; Greater London; Hybrid; GBP 88,000 - 110,000; Full time

Benefits offered by this job

Hybrid work

Competitive salary £87,500–£110,000

Wise Benefits

Job summary

Wise London is building an Account Insights team and seeks a backend engineer to own end-to-end features like spending summaries and spend controls. You’ll work across a high-throughput stack (Java/Spring Boot, Kafka) to turn millions of transactions into clear, actionable insights.

You’ll own components from development to production, collaborate with product and design, and contribute to testing, documentation, and on-call rotation.

Qualifications

• Deliver medium-sized backend projects independently end-to-end.
• Strong backend fundamentals and Java/Spring Boot experience.
• Experience with asynchronous communication and event streaming.
• Ability to write well-tested, high-quality code and review others.
• Familiarity with Kafka and stream processing is a plus.

Responsibilities

• Build the backend behind customer-facing insights features—spending summaries, travel insights, and spend controls like budgets and recurring payments tracking.
• Work across a high-throughput streaming and storage stack to aggregate activity data and serve it through low-latency APIs.
• Improve categorisation accuracy so the numbers customers see are trustworthy.
• Own components end-to-end—from development to production and on-call rotation.
• Write high-quality tests and clear documentation; review code to raise the bar.

Skills

Java

Spring Boot

Distributed systems

Testing & code quality

On-call rotation

Tools

Kafka

Spring Boot

Job description

Wise London is building an Account Insights team and seeks a backend engineer to own end-to-end features like spending summaries and spend controls. You’ll work across a high-throughput stack (Java/Spring Boot, Kafka) to turn millions of transactions into clear, actionable insights.

You’ll own components from development to production, collaborate with product and design, and contribute to testing, documentation, and on-call rotation.