Senior Backend Engineer I - Account Insights

Wise; Greater London; On-site; 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

Company Description

Wise is a global technology company, building the best way to move and manage the world’s money.

Min fees. Max ease. Full speed.

Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money.

As part of our team, you will be helping us create an entirely new network for the world's money.

For everyone, everywhere.

More about our mission and what we offer.

Job Description

About the role: We're building a new Account Insights team on a simple belief: when customers can see their money clearly, they manage it smarter - and move more of their financial life to Wise. You'll help turn millions of transactions into fast, trustworthy, genuinely useful insights that customers act on.

About the team: Account Insights is an early-stage, growing team spanning backend, mobile, and web, with product and design partners. You'll join with senior engineers alongside you and real ownership over what we build — a great fit if you want influence and room to grow.

How we work:

We believe that an engineer is more than just a coder. Our engineers are focused on improving our customers’ experience - and they see the impact of their work on millions of people every day.

Wise is all about collaboration. You will be surrounded by passionate people and work together with them to progress our mission.

What will you be working on?

• Building the backend behind customer-facing insights features — spending summaries, travel insights, and spend controls like budgets and recurring-payment tracking.
• Working across a high-throughput streaming and storage stack (Java/Spring Boot, Kafka, stream processing) to aggregate activity data accurately and serve it through low-latency, well-documented APIs.
• Improving categorisation accuracy so the numbers customers see are ones they trust.
• Owning components and flows end-to-end — through development, deployment, and running them in production, including the on-call rotation.
• Writing high-quality tests, clear documentation, and reviewing code to raise the bar across the team.

A bit about you

• You deliver medium-sized backend projects independently and see them through the full lifecycle, drawing on the team for the toughest problems.
• Solid backend fundamentals and proficiency in your primary language (we work mainly in Java/Spring Boot), plus a good grasp of distributed-systems concepts like asynchronous communication and event streaming.
• You write well-tested, high-quality code and actively improve what's around you.
• You give and receive feedback openly and help build a collaborative, inclusive team.
• Nice to have (not essential): experience with Kafka, stream processing, or high-throughput low-latency services.

Interested? Find out more

• How we work – a practical guide
• DEI @ Wise
• Wise Tech Stack (2025 update)
• See what it's like to work at Wise London!
• Our Engineering career map

Wise Engineering - https://medium.com/wise-engineering

What do we offer:

Starting salary: £87,500 - £110,000

Wise Benefits

#LI-AB3 #LI-Hybrid

Additional Information

For everyone, everywhere. We're people building money without borders — without judgement or prejudice, too. We believe teams are strongest when they are diverse, equitable and inclusive.

We're proud to have a truly international team, and we celebrate our differences.

Inclusive teams help us live our values and make sure every Wiser feels respected, empowered to contribute towards our mission and able to progress in their careers.

If you want to find out more about what it's like to work at Wise visitWise.Jobs.

Keep up to date with life at Wise by following us onLinkedInandInstagram.

Additional Information

For everyone, everywhere. We're people building money without borders — without judgement or prejudice, too. We believe teams are strongest when they are diverse, equitable and inclusive.

We're proud to have a truly international team, and we celebrate our differences.

Inclusive teams help us live our values and make sure every Wiser feels respected, empowered to contribute towards our mission and able to progress in their careers.

If you want to find out more about what it's like to work at Wise visitWise.Jobs.

Keep up to date with life at Wise by following us onLinkedInandInstagram.