[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Wise jobs](https://jobs.opennash.com/companies/wise/) · [Search jobs](/search/) Wise · London, United Kingdom # Senior Software Engineer II - Fraud Squad - Account Integrity (Java) London, United Kingdom Full-time Senior individual contributor Software Engineering Listed on Wise’s official careers site. Posted October 7, 2026. Check that it is still open and apply there. [Apply on Wise’s careers site →](https://jobs.smartrecruiters.com/Wise/744000154064478-senior-software-engineer-ii-fraud-squad-account-integrity-java-) [OpenNash Jobs](https://jobs.opennash.com/) / [Wise](https://jobs.opennash.com/companies/wise/) / Senior Software Engineer II - Fraud Squad - Account Integrity (Java) ## 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. ### 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). ## At a glance - Posted by the employer: Oct 7, 2026 - First seen by OpenNash: Jul 16, 2026 - Last checked: Oct 18, 2026 - Listed for: 94 days - Location: London, United Kingdom - Employment type: Full-time[Apply on Wise’s careers site →](https://jobs.smartrecruiters.com/Wise/744000154064478-senior-software-engineer-ii-fraud-squad-account-integrity-java-) ## More jobs at Wise ### [Backend Engineer](https://jobs.opennash.com/companies/wise/jobs/f4271b0a4b516af9c08f/) London, United Kingdom ### [Europe Risk And Controls Senior Software Engineer II](https://jobs.opennash.com/companies/wise/jobs/27d00e818fc576a2c3ff/) London, United Kingdom ### [Quantitative Researcher / Developer (Data Science) - Treasury FX](https://jobs.opennash.com/companies/wise/jobs/36f1c0e0fe237c7bf256/) London, United Kingdom ### [Senior Android Software Engineer - Grow](https://jobs.opennash.com/companies/wise/jobs/6ebf82bf289a6e807a2a/) London, United Kingdom ### [Senior Backend Engineer - Payin Platform](https://jobs.opennash.com/companies/wise/jobs/dd1b7149bfba7f7b235c/) London, United Kingdom ## Similar jobs at other companies ### [Lead Senior Java Backend Engineer / Squad Lead](https://jobs.opennash.com/companies/ntt/jobs/ebb81159d105d54b0e94/) NTT · Athens, Greece ### [Staff Software Engineer, Fraud](https://jobs.opennash.com/companies/twilio/jobs/bc368665df3179b44070/) Twilio · Remote - US ### [Software Development Engineer, Buyer Fraud Prevention](https://jobs.opennash.com/companies/amazon/jobs/c5e577f29cb8cac23a6e/) Amazon · IN, KA, Bengaluru ### [Senior Software Engineer - Computing Squad](https://jobs.opennash.com/companies/nu-holdings/jobs/dbdf020c3d4ae52cc844/) Nu Holdings · Toronto ### [Staff Software Engineer - Merchant Fraud Prevention](https://jobs.opennash.com/companies/adyen/jobs/888231c242d15e69906c/) Adyen · Amsterdam [Software Engineering jobs](/functions/software-engineering/) OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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