Payments Engineer - Java - Fynity

Payments Engineer - Java

London - Hybrid (1 day per week onsite)

Are you a hands-on Java Engineer who enjoys building high-performance, distributed systems where resilience, scalability and correctness really matter?

This is an opportunity to work at the heart of real-time payments infrastructure, helping to deliver mission-critical platforms used by some of the world's largest financial institutions.

We're hiring on behalf of a leading payments consultancy that designs and delivers event-driven payment platforms for Tier 1 banks across the UK and internationally.

You'll join a highly skilled engineering team responsible for building and enhancing low-latency, event-driven payment systems capable of processing millions of transactions every day.

Working as a senior individual contributor, you'll collaborate with architects, engineers and client teams to design and deliver robust, scalable software that powers real-time payment processing.

Responsibilities

• Design and develop high-performance Java applications for real-time payment processing.
• Build scalable, event-driven microservices using modern Java technologies.
• Develop asynchronous, message-driven systems with a strong focus on resilience and performance.
• Design clean, maintainable APIs and distributed system architectures.
• Work closely with architects, product teams and client stakeholders to deliver complex technical solutions.
• Contribute to technical design discussions, code reviews and engineering best practices.
• Operate within Agile (Scrum/Kanban) delivery teams.

What We're Looking For

You'll be someone who enjoys solving complex engineering problems and building highly resilient distributed systems.

We're particularly interested in engineers with:

• Strong commercial experience developing applications with Java 11+ (ideally Java 17+).
• Experience building scalable Spring Boot microservices.
• Strong experience/understanding of payments.
• Commercial experience with event-driven architectures and messaging technologies such as Kafka, JMS or Akka.
• Experience with TDD/BDD and modern CI/CD practices.
• Experience working with NoSQL databases, ideally MongoDB.

What's On Offer

• £70,000 - £115,000 basic salary (DOE)
• 20% annual bonus
• Hybrid working (1 day per week in London)
• Opportunity to work on business-critical payment platforms used globally.
• Exposure to Tier 1 banking clients and large-scale payment networks.
• Engineering-led culture where technical excellence and innovation are genuinely valued.
• Excellent long-term career progression within a growing payments consultancy.

If you're passionate about building resilient, high-performance Java applications and want to work on technology that underpins real-time payments at global scale, we'd love to hear from you.