Java Software Engineer

Fynity; Greater London; Hybrid; GBP 90,000 - 115,000; Full time

Benefits offered by this job

Hybrid working (1 day per week in city

20% annual bonus

Job summary

Fynity is hiring a hands-on Java Engineer to build high-performance, distributed systems for real-time payment processing. You will work at the heart of a modern payments infrastructure, delivering mission-critical platforms used by Tier 1 banks globally.

You’ll join an engineering team that designs low-latency, event-driven payment systems processing millions of transactions daily. Expect collaboration with architects, engineers, and client teams in an agile environment to deliver robust

Qualifications

• Experience developing high-performance Java applications for real-time payment processing.
• Proven ability to design scalable, event-driven microservices.
• Solid understanding of payments and messaging technologies.
• Familiarity with TDD/BDD and modern CI/CD practices.
• Experience with NoSQL databases such as MongoDB.

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 resilience and performance in mind.
• Design clean, maintainable APIs and distributed architectures.
• Collaborate with architects, product teams and client stakeholders to deliver solutions.
• Contribute to design discussions, code reviews and engineering best practices.
• Operate within Agile (Scrum/Kanban) delivery teams.

Skills

Java 11+/17+

Spring Boot microservices

Payments domain knowledge

Event-driven architecture

Kafka/JMS/Akka

TDD/BDD & CI/CD

MongoDB NoSQL

Job description

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

• £90,000 - £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.

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

• £90,000 - £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.