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- Tasks: Build high-performance, event-driven systems for real-time payments.
- Company: Leading payments consultancy with a focus on innovation.
- Benefits: 20% annual bonus, hybrid working, and exposure to major banks.
- Why this job: Join a high-performing team and make an impact in the financial sector.
- Qualifications: Strong Java experience and understanding of asynchronous programming.
- Other info: Work in a dynamic environment with opportunities for growth.
The predicted salary is between 43200 - 72000 £ per year.
Are you a senior, hands-on Engineer who thrives in event-driven, asynchronous environments? Do you enjoy building low-latency, high-throughput distributed systems where correctness, resilience, and performance really matter?
This is an opportunity to work at the core of real-time payments infrastructure, helping to power instant transactions for some of the world’s largest banks.
We’re hiring on behalf of a leading payments consultancy delivering mission-critical, event-driven platforms that integrate deeply with bank infrastructure to enable secure, real-time payments at global scale.
You’ll play a senior individual-contributor role within a high-performing engineering team, building asynchronous, message-driven systems designed for scale, resilience, and near-zero downtime.
- Build event-driven architectures using modern Java and reactive frameworks
- Operate in Agile environments (Scrum / Kanban) with a strong engineering culture
- Java 17+, Spring WebFlux, Akka, Kafka, reactive streams, distributed messaging, cloud-native tooling
We’re looking for engineers who enjoy thinking in events, streams, and asynchronous workflows, and who take pride in building systems that perform under pressure.
- Strong hands-on experience with Java 11+ (ideally Java 17) in production environments
- Deep understanding of asynchronous and reactive programming models
- Experience building and testing production-grade systems using TDD/BDD and CI/CD pipelines
- Comfortable working on complex, long-lived systems where performance and reliability are critical
Bonus (not essential): Experience in banking, payments, or financial systems, or if you’ve built real-time platforms at scale.
20% annual bonus ~ Hybrid working – 1 day a week onsite (more if you prefer) ~ Exposure to major international banks and payment networks
Senior Agile Java developers in London employer: Fynity
Contact Detail:
Fynity Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Agile Java developers in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, especially those who work in payments or banking. A friendly chat can lead to insider info about job openings that aren't even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects, especially those involving Java, Spring WebFlux, or reactive programming. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for technical interviews by brushing up on your knowledge of asynchronous and event-driven systems. Practice coding challenges that focus on Java and reactive frameworks to impress during the interview.
✨Tip Number 4
Don’t forget to apply through our website! We’ve got some fantastic opportunities waiting for you, and applying directly can sometimes give you an edge over other candidates.
We think you need these skills to ace Senior Agile Java developers in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with Java 11+ and any relevant frameworks like Spring WebFlux. We want to see how your skills align with our needs, so don’t be shy about showcasing your hands-on experience in building asynchronous systems!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Tell us why you’re passionate about event-driven architectures and how you thrive in Agile environments. We love seeing your personality come through, so keep it engaging and relevant to the role.
Showcase Your Projects: If you've worked on any real-time platforms or complex systems, make sure to mention them! We’re keen to hear about your contributions and the impact they had, especially if they involved low-latency or high-throughput solutions.
Apply Through Our Website: We encourage you to apply directly through our website for a smoother process. It helps us keep track of your application and ensures you don’t miss out on any important updates. Plus, it’s super easy!
How to prepare for a job interview at Fynity
✨Know Your Tech Inside Out
Make sure you’re well-versed in Java 17+, Spring WebFlux, and the reactive programming models. Brush up on your knowledge of asynchronous workflows and distributed systems, as these will be key topics during your interview.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in building low-latency, high-throughput systems. Use examples that highlight your ability to think in events and streams, and how you’ve tackled performance issues in past projects.
✨Familiarise Yourself with Agile Methodologies
Since the role operates in Agile environments, be ready to talk about your experience with Scrum or Kanban. Share how you’ve contributed to a strong engineering culture and how you adapt to changing requirements.
✨Demonstrate Your Testing Knowledge
Be prepared to discuss your experience with TDD/BDD and CI/CD pipelines. Highlight any production-grade systems you’ve built and tested, and explain how you ensure reliability and performance in your code.