Senior Software Engineer

Wise Australia Investments; Greater London; Hybrid; GBP 88,000 - 111,000; Full time

Benefits offered by this job

Wise Benefits

RSUs

Job summary

Wise London is seeking a Senior Software Engineer for the Account Integrity team. This high-impact role focuses on solving complex, real-world adversarial problems to protect our global customer base and build a scalable fraud prevention engine.

You will own end-to-end projects, delivering measurable security improvements and driving backend/frontend work (roughly 80/20). Collaborate with Product, Data Science and Investigations to accelerate product growth while safeguarding users’ money.

Qualifications

• Proven experience with Java or JVM languages and Spring.
• Experience building scalable web apps handling high traffic.
• Frontend experience with React, JavaScript or TypeScript.
• A strong product mindset with data-driven decisions.

Responsibilities

• Build and refine critical controls to protect customer accounts from takeovers.
• Drive backend and frontend for crime prevention and detection systems (80/20).
• Deliver measurable security improvements while accelerating product growth.

Skills

Product ownership

Data-driven decisions

Team collaboration

Problem solving

Tools

Java

Spring Framework

React

JavaScript

TypeScript

CI/CD

Distributed Systems

Databases (SQL/NoSQL)

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

Job Description

About the role:

Join us as a Senior Software Engineer in our critical Account Integrity team. This is a high-impact engineering role with a strong product focus, dedicated to solving complex, real-world adversarial problems to directly protect our global customer base.

How we work:

The Account Integrity Team

The Account Integrity team is on the front lines, dedicated to safeguarding our platform against sophisticated financial crime. We leverage cutting-edge machine learning, real-time transaction monitoring, and advanced data analysis to create robust controls and detection capabilities. Our vision is to build a globally scalable fraud prevention engine that protects customer accounts, prevents scams, and consistently surpasses regulatory expectations.

What will you be working on?

This defining role involves continuously improving our financial crime prevention infrastructure and systems. You will deliver a direct, measurable impact on customer security by taking end-to-end ownership of projects focused on:

• Building and refining critical controls to protect Wise customers accounts from account takeovers.
• Drive Backend and Frontend for our crime prevention and detection systems - You will be working 80% of the time on a backend and 20% on the frontend
• You will be delivering a tangible, real-world impact by securing customers' money, accelerating product growth by raising automation levels, and helping us engineer a world-class money transfer product.

What do you need?

• Engineering Expertise: Professional experience with Java or other JVM-based languages, including the Spring framework. Experience building and designing scalable web applications that handle large amounts of traffic - ideally using React based frontend applications, Javascript / Typescript.
• System Design & Operation: Proven experience designing and operating CI/CD pipelines, Distributed, and Concurrent Systems.
• Product Ownership: A strong product mindset, accountability, and the ability to drive projects independently, making data-driven decisions with the customer in mind.
• Data Proficiency: Experience with relational and non-relational databases, including query optimisation and designing resilient schemas.
• Code Quality: Exceptional fundamentals, sharp problem-solving ability, and a commitment to Test Driven Development and best coding practices.
• Collaboration: Excellent communication skills to articulate complex technical concepts across teams (Product, Data Science, Investigations).

Nice to Have:

• Familiarity with the machine learning lifecycle (data pipelines, feature engineering, and deploying ML systems into production).

Additional Information

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 - 111,000 + RSUs
• Wise Benefits

#LI-AB3 #LI-Hybrid

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 visit Wise.Jobs.

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