Lead Java Engineer (Payments)

Contract 

Outside IR35

6 Months initially 

Rate - TBC

Fully Remote 

Immediate Start or 16/02 

The Client/Role

My client are a high-growth start-up / scale-up in the middle of building a brand-new cross-border payments and foreign exchange platform. This role is a critical hire within the programme and will suit a Senior / Principal Engineer who thrives in greenfield environments.

You will work hands-on alongside the CTO, taking responsibility for design, architecture, and build of the platform. As an early technical leader, you’ll have opportunity to influence technical strategy.

Key Responsibilities 

• Lead the design, architecture, and hands-on development of a new payments platform
• Work closely with the CTO to define and evolve technical strategy
• Build scalable, secure solutions for cross-border payments and FX
• Make key architectural and engineering decisions in a start-up / scale-up environment
• Develop event-driven services and APIs to support complex payment flows
• Support the growth of the engineering function as new developers join
• Contribute across the full SDLC, from concept and design through to production

Experience/Skills 

• Significant experience as a Senior / Principal Engineer in complex systems
• Strong background in the payments industry, ideally B2B payments
• Deep understanding of financial services terminology, payment flows, and FX
• Experience building greenfield or scale-up platforms
• Familiarity with FIX and/or SWIFT messaging standards
• Proven experience with event-driven architectures
• Comfortable working in environments with high autonomy and responsibility

Technical Stack

• Java
• AWS
• Eclipse Framework (not IDE)
• JEE / Jakarta EE
• REST APIs & OpenAPI
• Hibernate
• JUnit
• Docker
• Event-driven architecture
• Notion (documentation – similar to Confluence)
• Linear (delivery tracking – similar to Jira)

Lead Java Engineer (Payments)

Contact information

Alex Carter