Senior Java Developer

Senior Software Engineer – Real-Time Systems | £95k - £115k + 20% Bonus   Location: London (Hybrid, 1-2 days per week)   Are you a highly experienced Software Engineer looking to take on a senior hands-on role while mentoring the next generation of top talent? Do you want to work on high-performance, real-time systems that process millions of transactions in milliseconds? This is your opportunity to join a leading payments technology consultancy, working with some of the world’s largest financial institutions to redefine the future of real-time payments. This company is setting the bar high, so rest assured, you will be working alongside some of the industries most talented Developers and Engineers.   The Role As a Senior Software Engineer, you’ll be at the forefront of building asynchronous, event-driven systems using Java 17+, Spring WebFlux, AKKA, Kafka, and more. You’ll be working fully hands-on in a high-volume, low-latency environment, contributing to architecture and design, while also mentoring and guiding other engineers to raise the technical bar across the team. Design and develop high-performance, scalable applications for real-time payments. Lead technical discussions and drive best practices in TDD & BDD methodologies. Optimise applications for high availability, resilience, and scalability. Mentor and support mid-level and junior engineers, fostering a collaborative engineering culture. Work in a highly agile Kanban/Scrum environment, contributing to continuous improvement.  What We’re Looking For: Expert-level experience in Java 11+ (ideally Java 17) and Reactive Programming (Spring WebFlux, AKKA). Strong knowledge of asynchronous request handling and distributed systems. Proven experience with event-driven architectures and real-time messaging (Kafka, JMS). A strong advocate for Agile methodologies (TDD, BDD) and CI/CD best practices. Mentorship experience, helping to upskill and guide engineers within the team. Experience building high-performance, mission-critical systems (Payments, Banking, or any real-time transactional systems). Excellent soft skills, you’ll be working in a collaborative team with stakeholders from across the business.Not from a Banking/Payments background? If you’ve worked on complex real-time systems in other industries, we still want to hear from you!   What’s in It for You? £95k - £115k salary (depending on experience) 20% bonus (based on both company and personal performance) Work with cutting-edge technology in a high-impact role Shape the future of payments at a global scale Flexible hybrid working (London office, 1-2 days per week)  Ready to Take a senior role in a High-Performance Engineering Team? If you're a senior engineer who wants to stay hands-on while mentoring others, this is your chance to work on mission-critical financial systems and drive real innovation. Apply now and be part of the next evolution in real-time payments technology!  If you are interested please apply ASAP. The People Network is an employment agency and will respond to all applicants within three - five working days. If you do not hear within these timescales please feel free to get in touch