Senior Java Distributed Systems Engineer - Fintech - London

Overview

In this role you will design, implement, and optimize distributed systems for Aeron Sequencer, applying replicated state machines to capital markets. You will collaborate with cross-functional teams to influence product decisions and architecture while delivering high-performance Java services. You’ll tackle challenges in reliability, performance, and scalable messaging, contributing to a product-driven fintech platform. This is an opportunity to shape technology used across financial market workflows in a collaborative, flexible environment.

Pay / Benefits

• 25 days holiday
• Family medical and dental
• Pension plan
• Season ticket loan
• Gym subsidy
• Life insurance

Responsibilities

• Analyze, design, and develop distributed systems based on replicated state machines
• Write clean, efficient Java code
• Design and evolve messaging protocols and software libraries
• Troubleshoot and debug Java applications and distributed systems
• Apply testing, benchmarking, and profiling to improve correctness and performance
• Participate in code reviews and technical discussions to raise quality
• Contribute to product decisions beyond task execution
• Keep up to date with relevant software engineering practices
• Communicate technical decisions clearly to stakeholders

Key requirements

• Experience designing, building, debugging, and operating distributed systems
• Strong experience developing server-side software in Java
• Experience designing and evolving messaging protocols or libraries
• Experience using different forms of testing to support software quality (correctness and performance)
• Experience measuring, benchmarking, and profiling components or systems
• Strong written and verbal communication skills
• Collaborative approach and willingness to share knowledge
• Ability to prioritise competing demands based on long-term value and explain priorities
• collaborative approach
• clear communication
• prioritisation of trade-offs
• Java server-side development
• designing and evolving messaging protocols
• distributed systems design and operation

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