Software Engineer

Senior Software Engineer – Backend (Java, Distributed Systems)

London | Hybrid | Full-time

A global payments technology platform is re-architecting how money moves in real time, building highly resilient, event-driven systems that operate at scale and power critical financial flows worldwide.

This role sits within a core engineering team responsible for designing and delivering backend services that make intelligent, time-sensitive decisions about how money moves across a global network. The systems are event-driven, highly distributed, and business-critical, requiring strong engineering discipline and pragmatic architectural thinking.

What you’ll be working on

• Designing and building backend services that sit at the heart of a large-scale financial platform

• Developing Java-based services that support real-time decision-making and high-throughput processing

• Ensuring systems are observable, resilient, and performant

• Collaborating with engineers, product partners, and stakeholders to turn business requirements into robust technical solutions

• Contributing to improvements in testing, deployment, and overall engineering quality

The technical environment

• Java (modern versions) with a strong object-oriented foundation

• Microservices running in a cloud-native environment

• Event-driven and streaming-based systems (Kafka or similar)

• Containerised services using Docker and Kubernetes

• APIs as first-class interfaces between services

• SQL-backed persistence layers at scale

• Strong focus on testing practices including unit, integration, and contract testing

• CI/CD pipelines and modern DevOps practices

• High emphasis on observability, monitoring, and operational excellence

What we’re looking for

• Strong backend engineering experience with Java in production environments

• Experience building and operating distributed systems at scale

• Practical exposure to event-driven or streaming architectures

• Comfort working in cloud-native environments (AWS or similar)

• A quality-first mindset: testing, reliability, and maintainability matter to you

• Ability to work autonomously while collaborating effectively within a team

• Clear communication skills and confidence working with both technical and non-technical stakeholders

Why this role

• Ownership of critical systems with genuine business impact

• A modern stack and the opportunity to influence how systems evolve

• Visibility, autonomy, and support within a mature engineering organisation

• Hybrid working with a London-based engineering team

If you’re a senior backend engineer who enjoys working on high-scale, high-impact systems and wants to be close to the technical heart of a global financial platform, this is well worth a conversation.