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# Senior Software Engineer II

- **Company:** Wise
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £111,000.0 - £145,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Software Quality, Java Virtual Machine (JVM), Spring Framework, Machine Learning, Query Optimization, TypeScript, Test-Driven Development (TDD), Feature Engineering, ReactJS, Backend, Data Analytics, Non-relational Database, Machine Learning Operations, Front End Software Development, Data Pipelines
- **Published:** July 18, 2026
- **Apply:** https://jobs.theguardian.com/job/10155818/senior-software-engineer-ii/

## About the Role

* 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).

## Description

Join us as a Software Engineer in our critical Scam Prevention 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., 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 prevent Wise customers from scams.
 * Drive Backend and Frontend for our scam 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.


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