Senior Backend Engineer Payin Platform

Recurring Payin team owns the Direct Debit API that powers automated payments into Wise. Underneath this we are building a platform that allows customers to easily schedule top-ups or business collections.

The platform is also built on top of our internal Payin Platform rails; which is a critical component to the Wise money-movement machine and were looking for an engineer motivated to come and help us build for this.

We primarily offer APIs for any partner looking to set up automated funding or pre-authorizations. From setting up GBP balance top ups automatically to allowing business partners collect EUR bills monthly without having the customer go through the flow every time; our platform aims to consolidate all these use-cases.

We aim to allow customers to give a one time permission (pre-authorization) for Wise to pull money across any payment method a USD bank account or a EUR issued bank card; you name it.

Job Responsibilities:

• Design develop test and maintain backend services written in Java and Kotlin using the Spring Boot framework deployed on cloud infrastructure (AWS)
• Build and maintain RESTful APIs that serve millions of customers across web and mobile platforms
• Develop and optimise services powering the card pay-in payment method one of the most popular payment methods enabling Wise customers to move around 1 billion every month
• Design and implement database schemas write and optimise SQL queries against PostgreSQL databases handling high-volume transactional data
• Build and maintain event-driven architectures using Apache Kafka for asynchronous processing of financial events across distributed services
• Develop and maintain a payment orchestration system that dynamically routes payments across Payment Service Providers to optimize for cost and reliability
• Write automated tests (unit integration and end-to-end) to ensure correctness and reliability of financial systems
• Conduct code reviews for team members ensuring code quality security and adherence to engineering standards
• Participate in on-call rotations to monitor and respond to production incidents for Tier 2 critical services
• Collaborate with product managers designers analysts and engineers across other teams to deliver cross-functional projects
• Identify and resolve performance bottlenecks scalability issues and technical debt in existing systems
• Ensure development follows security best practices particularly around handling of sensitive financial data and compliance with financial regulations

Qualifications :

Requirements

• Great communication skills and the ability to articulate complex technical concepts to non-technical audiences
• Ability to work independently while also being a good team player. Your work will frequently involve cross-team collaboration.
• Ability to break down complex projects into incremental milestones that deliver customer value
• Experience in developing web applications and distributed systems in a production environment
• Experience with common design and architectural patterns coupled with a passion for writing clean code that is performant and well tested
• Curiosity and drive for continuous learning and improvement
• Following and advocating best coding practices continuous delivery and code reviews
• Experience working with relational and non-relational databases query optimisation and designing schemas is a plus
• Knowledge of Java and Spring boot and experience with a messaging system like Kafka is a plus

but dont worry we dont expect you to know everything!

Additional Information :

What does success look like

• Youll have onboarded and found your place through understanding your team and tribe vision and how you can contribute
• Youll understand how our values can help you guide your work
• Youll understand the reasons behind problematic payments and customer difficulties and how to go about solving them
• Youll be raising the automation level to enable scaling of the product
• Youll understand our customers and the impact our product makes in their lives
• Youll help us scale-up and build a world class global banking product by finding solutions to our technical challenges and opportunities

Interested Find out more:

• How we work - a practical guide

• DEI @ Wise

• Wise Tech Stack (2025 update)

• See what its like to work at Wise London

• Our engineering career map

Wise Engineering do we offer:

• Starting salary: 87500 - 111000 RSUs

• Wise Benefits

For everyone everywhere. Were people building money without borders without judgement or prejudice too. We believe teams are strongest when they are diverse equitable and inclusive.

Were 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 its like to work at Wise visit .

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

For everyone everywhere. Were people building money without borders without…