Senior Software Engineer I – Account Integrity Team – Fincrime (London)

Company: Wise
Apply for the Senior Software Engineer I – Account Integrity Team – Fincrime (London)
Location: London
Job Description:

Job Description

hackajob is collaborating with Wise to connect them with exceptional professionals for this role.

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Company Description

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Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed.

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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.

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

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More about our mission and what we offer.

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Job Description

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About the role:

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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.

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How we work:

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The Account Integrity Team

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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.

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What will you be working on?

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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:

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  • n Building and refining critical controls to protect Wise customers accounts from account takeovers.
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  • n 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
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  • n 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.

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What do you need?

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  • n 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.
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  • n System Design & Operation: Proven experience designing and operating CI/CD pipelines, Distributed, and Concurrent Systems.
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  • n Product Ownership: A strong product mindset, accountability, and the ability to drive projects independently, making data-driven decisions with the customer in mind.
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  • n Data Proficiency: Experience with relational and non-relational databases, including query optimisation and designing resilient schemas.
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  • n Code Quality: Exceptional fundamentals, sharp problem-solving ability, and a commitment to Test Driven Development and best coding practices.
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  • n Collaboration: Excellent communication skills to articulate complex technical concepts across teams (Product, Data Science, Investigations).

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Nice to Have:

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

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Interested? Find out more:

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

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What do we offer: 

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  • n Starting salary: £87,500 – 111,000 + RSUs
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  • n Wise Benefits

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#LI-AB3 #LI-Hybrid

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Additional Information

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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.

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

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

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

Posted: July 13th, 2026