Senior Java Developer

About the role

We are seeking an experienced Senior Java Developer to join our growing engineering team in London, building cutting‑edge post‑trade technology solutions in a cloud‑first environment. The role involves developing business‑critical applications, APIs, client reporting platforms and web portals that support sophisticated trading systems across capital markets.

Key responsibilities

• Designing, developing and enhancing Java‑based applications, APIs and web platforms.
• Customising and extending third‑party trading systems.
• Building scalable microservices and distributed applications.
• Writing clean, maintainable, test‑driven code following SOLID principles and design patterns.
• Translating business requirements into technical solutions in collaboration with stakeholders.
• Participating in architecture discussions, code reviews and continuous improvement initiatives.
• Mentoring and supporting developers while promoting engineering excellence.
• Collaborating with global development teams and contributing to Agile delivery.
• Leveraging AI tools to improve developer productivity throughout the software development lifecycle.

Required profile

• Minimum 7 years of commercial Java development experience, preferably within financial services or capital markets.
• Strong experience with Java 11+ and Spring Boot.
• Proven ability to work in a fast‑paced, collaborative engineering environment.
• Excellent communication skills and ability to translate complex problems into practical solutions.
• Knowledge of capital markets, especially clearing or prime brokerage, is a plus.

Required skills

• Java (Java 11+)
• Spring Boot
• Multi‑threading and performance optimisation
• Profiling
• Microservices architecture
• Test‑Driven Development (TDD) with JUnit, Mockito, Spock
• Maven and Git
• CI/CD pipelines and DevOps practices
• SOLID principles, design patterns and clean code
• Groovy
• FIX/FIXML and FpML
• REST APIs, JSON
• Messaging technologies