Java Developer (FX Matching Applications)

London Stock Exchange; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

London Stock Exchange is seeking a Senior Java Developer to join our engineering team. You will build and enhance backend systems that support FX trading, focusing on speed, reliability, and scalability.

You will collaborate with engineers, product partners, and operations, own features from development through production, write automated tests, and contribute to continuous delivery and secure coding practices.

Qualifications

• Experience developing backend systems in a professional environment.
• Comfortable working in a Linux environment.
• Familiarity with development tools such as Git and CI/CD pipelines.
• Understanding of system performance and concurrency.
• Experience working with Java.
• Ownership mindset and collaborative teamwork.
• Experience in trading or financial systems is a plus.
• Familiarity with messaging protocols (e.g. FIX).

Responsibilities

• Build and enhance backend applications using Java.
• Design solutions that improve system reliability and scalability.
• Contribute to improving performance and overall system stability.
• Take ownership of features from development through to production.
• Work with teammates across engineering, product, and operations.
• Contribute to planning, code reviews, and mentoring team members.
• Investigate production issues and drive continuous improvement.
• Write automated tests and support continuous delivery practices.
• Follow secure coding standards and support compliance requirements.

Skills

Java

Linux

Git

CI/CD

Performance

Concurrency

Trading domain

Messaging (FIX)

Mentoring

Automated testing

Job description

• We’re looking for a Senior Java Developer to join our team. You’ll help develop and improve systems that support FX trading. Your work will play a meaningful role in delivering reliable and efficient trading experiences. You’ll focus on making our applications faster, more stable, and easier to scale


• You’ll work closely with engineers, product partners, and operations in a collaborative environment. You’ll also have the opportunity to contribute ideas and help shape how we design and build our systems


• Build and enhance backend applications using Java


• Design solutions that improve system reliability and scalability


• Contribute to improving performance and overall system stability


• Take ownership of features from development through to production


• Work with teammates across engineering, product, and operations


• Contribute to team activities such as planning, code reviews, and mentoring/coaching team members


• Investigate production issues and work on continuous improvement efforts


• Help improve how the team builds and delivers software


• Write automated tests and support continuous delivery practices


• Follow secure coding standards and support compliance requirements

Experience developing backend systems in a professional environmentComfortable working in a Linux environmentFamiliarity with development tools such as Git and CI/CD pipelinesUnderstanding of system performance and concurrencyExperience working with JavaYou take ownership of your work and follow throughYou are comfortable working both independently and as part of a teamYou communicate clearly and work well with othersExperience in trading or financial systemsFamiliarity with messaging protocols (e.g. FIX)You enjoy solving problems and learning new things