Senior Software Engineer II - Cash Management

About the role We’re looking for a Senior Software Engineer II to join our Wise for Banks team and help shape the technical direction of the systems powering Wise’s global payment network. In this role, you’ll operate at the intersection of engineering, product, and partnerships by driving the architecture, scalability, and reliability of the infrastructure that enables banks to connect seamlessly to Wise. With deep expertise in Java, Spring Boot, Kafka, and PostgreSQL, you’ll lead the design of highly available services and event-driven systems that power partner integrations and financial flows at scale. You’ll influence architecture across Wise’s ecosystem of 700+ microservices, helping teams make sound technical decisions and ensuring systems remain maintainable, observable, and resilient as our platform grows. Beyond hands-on technical contributions, you’ll act as a technical authority and multiplier for the organisation. You’ll mentor engineers, raise engineering standards, and guide teams toward best practices in microservices architecture, domain-driven design, and distributed systems. You’ll also play a key role in cross-team initiatives, representing Wise Platform and helping align engineering efforts with company-wide goals. At Wise, we value collaboration, curiosity, and shared ownership. In this role, you’ll develop deep expertise in correspondent banking and interbank payment networks, helping shape the systems that enable banks and businesses to move money globally with speed, transparency, and reliability. You’ll regularly contribute to technical discussions, architecture reviews, and strategic planning across teams. Our Partner Cash Management team builds and maintains the infrastructure that enables banks to fund, hold, and manage liquidity within interbank payment networks. Our platform helps partners optimise liquidity, support seamless payments, and manage foreign exchange (FX) exposure at scale. As a Software Product Engineer, you’ll play a critical role in evolving this platform to support the next generation of global financial partnerships. We’re looking for someone who: Has extensive hands-on experience with Java and Spring Boot in production environments Has strong experience designing and operating large-scale distributed systems and microservices architectures Is comfortable designing event-driven systems using Kafka or similar technologies Has strong experience modelling and building systems with PostgreSQL or other relational databases Applies domain-driven design principles to build scalable and maintainable systems Has a track record of architecting and delivering complex, high-scale systems Demonstrates strong technical leadership and cross-team influence Communicates effectively with both technical and non-technical stakeholders What will you be doing? Lead the design and development of highly scalable and resilient services in Java and Spring Boot within Wise’s microservices architecture, helping evolve the systems that power our global payments network. Apply domain-driven design to model complex financial domains and build robust, scalable solutions that support Wise’s growing partner ecosystem. Drive the development and adoption of event-driven architectures using Kafka or similar messaging systems, ensuring systems are reliable, observable, and able to scale with increasing transaction volumes. Architect and optimise relational database systems (e.g. PostgreSQL), ensuring strong data modelling, performance, and reliability across critical financial workflows. Collaborate with cross-functional teams including Product, Implementation, Solutions Engineering, and Business Development to support partner integrations and expand the Wise payment platform globally. Provide technical leadership across teams, influencing architecture decisions, contributing to platform-level improvements, and ensuring engineering standards remain high across services. Participate in code reviews, architecture discussions, and technical planning, championing best practices in distributed systems, reliability, and maintainability. Mentor and support engineers, helping grow technical capability across the team while fostering a culture of learning, ownership, and collaboration. What do you need? We are fully aware that it is uncommon for a candidate to have all the skills required and we fully support everyone in learning new skills with us. So if you have some of those listed below and are eager to learn more we do want to hear from you! Extensive experience building backend systems using Java and Spring Boot, or similar languages and frameworks, in production environments. Strong experience designing and operating large-scale microservices architectures and distributed systems. Proven experience building or operating event-driven systems using Kafka or similar messaging platforms. Strong knowledge of relational databases such as PostgreSQL, including schema design, query optimisation, and maintaining data integrity in high-scale systems. Experience applying domain-driven design (DDD) to model complex business domains and design scalable systems is a plus. A strong product mindset and passion for user experience — you prioritise work with the customer in mind and make data-driven decisions to solve real problems. Excellent problem-solving skills, with the ability to operate independently while collaborating effectively across teams. Strong communication and leadership skills, with the ability to clearly convey technical concepts to both technical and non-technical audiences. Experience mentoring engineers and contributing to raising technical standards across teams. …but don’t worry — we don’t expect you to know everything! Interested? Find out more: How we work – a practical guide DEI @ Wise Wise Tech Stack (2025 update) Our Engineering career map Scaling our Infrastructure; how we make it work Wise Engineering – What do we offer: Wise Benefits 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 . Keep up to date with life at Wise by following us on LinkedIn and Instagram . 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 .