Senior Full-Stack Software Engineer

Xapply; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Wise is seeking a Senior Full-Stack Engineer to join the Account Integrity team in London. This high-impact role focuses on solving adversarial problems to protect our global customer base, with end-to-end ownership of projects that matter for security and trust.

You'll work in a cross-functional environment with product, design, data science, and investigations, delivering customer-facing controls and scalable fraud prevention capabilities that support Wise's mission to move money securely and

Qualifications

• Experience with Java or JVM languages and the Spring framework.
• Experience building scalable web applications handling high traffic.
• Frontend experience with React, JavaScript and TypeScript.
• CI/CD pipelines and distributed systems experience.
• Strong product mindset and data-driven decisions with customers in mind.
• Experience with relational and non-relational databases and resilient schemas.
• Commitment to TDD and best coding practices.
• Excellent communication and collaboration; mentoring junior engineers.

Responsibilities

• Build and refine critical controls to protect Wise customers' accounts.
• Collaborate with Product, Design, Data Science, and Investigations.
• Deliver tangible impact by securing customers' money and increasing automation.

Skills

Java

Spring

React

JavaScript

TypeScript

Distributed systems

System design

TDD

Mentoring

Collaboration

Tools

PostgreSQL

MongoDB

AWS

Kubernetes

Job 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.

About the role:

Join us as a Senior Full-Stack 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.

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 prevents account takeovers by building industry-leading controls and detection.
What will you be working on?
This defining role involves continuously improving our financial crime prevention infrastructure systems and building customer-facing controls. 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.
• Working in a full-stack capacity - with Product & Design to design convenient, customer-facing controls & working with data scientists and data analysts to improve our detection capabilities
• 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).
• Experience in mentoring and growing more junior Engineers.

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

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.

Keep up to date with life at Wise by following us on LinkedIn and Instagram.

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.

Keep up to date with life at Wise by following us on LinkedIn and Instagram.