Senior Software Engineer II - Backend (Java)

Salary: £66,000 - 106,000 per year

Requirements:

• 5+ years of experience in Java, Kotlin, Python, or Go
• Strong experience with Spring framework, relational databases, and distributed and concurrent systems such as Kafka
• Excellent cross-team communication skills, including the ability to discuss complex technical topics with technical and non-technical stakeholders
• Experience writing testable code and using testing strategies such as unit testing and integration testing
• Commitment to best coding practices, code reviews, and open feedback
• Strong communication skills and the ability to explain complex technical concepts to non-technical audiences
• A drive to improve team culture and processes
• A strong product mindset and passion for customer experience, with the ability to make data-driven decisions
• Ability to work independently, take end-to-end ownership, and drive customer problems through to completion

Responsibilities:

• Join our Payin Platform team in our London office
• Build the Payin Session and Payment abstractions that allow product teams to integrate payment methods once and scale to millions of transactions
• Own a high-volume, high-leverage platform used across the company
• Focus on correctness, reliability, and thoughtful API design
• Work closely with product teams and support the money-in layer that powers how money enters Wise

Technologies:

• API
• Support
• Java
• Kafka
• Kotlin
• Python
• Spring
• Network
• Backend

More:

We are Wise, a global technology company on a mission to make moving and managing money cheaper, faster, and easier for everyone, everywhere. Our Payin Platform team in London builds the layer that powers how money enters Wise, connecting product teams with the payment methods we support, including Cards, Apple Pay, Google Pay, Balance, Bank Transfer, PISP, UPI, Direct Debit, and more. We offer a full-time Engineering role at mid-senior level, with a starting salary of 111K-145K GBP plus RSUs, hybrid working, and the opportunity to work in a diverse, equitable, and inclusive international team.

last updated 34 week of 2026