Software Engineer -Backend

About the role

- Are you curious, excited by experimentation and always looking to innovate?

- Do you want to work in embedded payments where you can keep learning and developing whilst getting hands-on experience?

- Do you want to have the opportunity to play an important role in a rapidly growing and exciting Fintech business?

If so, we would love to connect and collaborate!

Who We Are Modulr is the payments automation platform that streamlines money movement with accuracy, control and reliability — built to scale. We process more than 200m transactions and over £180bn in payment value on an annualised basis, and we’re trusted by over 6,000 businesses from fast-growing SMEs to global enterprises. We automate how money moves into and out of a business — payroll, supplier payments, spend management and payment collection — through a single platform, connected to the accounting and payroll systems finance teams already use and underpinned by principal memberships of Visa and Mastercard and direct access to central bank infrastructure. As a regulated payments provider with over a decade of experience, we’re the platform finance teams trust to run mission-critical operations. Modulr is backed by PayPal, FIS, General Atlantic, Blenheim Chalcot, Frog Capital and Highland Europe, with over 400 employees across London, Edinburgh, Amsterdam, Mumbai and Pune.

The Team At Modulr we are focused on building autonomous squads that are focused on working in the best possible way. We operate in a tribes and squad model with each area focused on a particular growth area. Each squad is small and cross-functional. We have big ambitions and have many interesting challenges ahead.

Summary In this role you will design, build, and evolve the next generation of Modulr’s event-driven payments platform. You’ll work across the full engineering lifecycle—from shaping technical approaches to delivering production-grade software—within a squad that values ownership, excellence, and continuous improvement.

Specific duties

- Engineering & Architecture

- Design and develop backend services using Java (17+) or similar OO languages.

- Build and evolve microservices and distributed, event-driven components in a cloud-native environment.

- Contribute to architectural patterns that support throughput, resilience, reliability, and observability.

- Design clean, well-documented RESTful APIs and service contracts.

- Work with relational data stores, especially PostgreSQL, and contribute to data modelling.

Distributed Systems & Reliability • Engineer solutions for concurrency, idempotency, fault tolerance, retries, and high availability. • Improve system performance, reduce latency, and identify bottlenecks across services. • Build systems with strong observability—logs, metrics, tracing—ensuring issues can be diagnosed quickly.

Quality & Testing • Develop comprehensive automated tests using frameworks such as JUnit, Mockito, Cucumber. • Participate in design and code reviews, helping raise engineering standards across the team. •Advocate for code quality, maintainability, and long-term technical health.