Senior Java Developer

• Develop, maintain, and improve the performance of our crossing systems, including Instinet BlockMatch MTF and CBX crossing applications.
• Contribute to the vision and technical direction of our common Core trading systems.
• Work with business stakeholders to elicit and analyse requirements for new and existing crossing applications.
• Collaborate with senior architects to design software for a business-critical trading system.
• Improve performance and latency across our crossing systems using performance engineering best practices.
• Own the full software lifecycle from design and implementation through to production.
• Implement solutions in line with our software standards and support delivery to QA and UAT stakeholders.
• Work with deployment and Change Management functions to integrate changes into production.
• Participate in peer review of colleagues software to strengthen quality across the group.
• Provide timely 2nd level support for trading system software in production, including UK/US market hours and occasional weekend or holiday coverage.
• Produce technical documentation and How-Tos to support cross-training.
• Mentor and provide technical guidance to junior team members.

Technologies:

• ARM
• Git
• Support
• Java
• Linux
• Network
• Perl
• Python
• SQL
• SVN
• microservices

• Working knowledge of equities trading systems, preferably in crossing/matching engines.
• Proficiency in FIX protocol trading workflows from the venue/exchange perspective.
• Experience developing high-volume, low-latency trading systems in Java, including performance running, profiling, and monitoring.
• Knowledge of performance engineering methods and techniques.
• Background in source code version control systems such as SVN and GIT.
• Experience working in a fast-paced environment supporting mission-critical systems.
• Familiarity with Agile and Scrum, microservices, distributed systems, and messaging.
• Strong core Java skills, with Perl or Python.
• Good knowledge of SQL, Linux, and networking skills.
• Experience in the financial services or trading technology environment is preferred.

We are Nomura, a financial services group with an integrated global network, connecting markets East and West through our Wealth Management, Investment Management, Wholesale, and Banking businesses. Our Global Execution Services - Instinet Crossing Technology team in London works within our agency-model execution services arm, supporting brokerage services across more than 65 markets. We build and operate advanced electronic trading strategies, high-touch trading services, desktop trading platforms, analytics, and unique liquidity solutions that help clients lower trading costs and improve investment performance. This is a hybrid London role with an emphasis on collaboration, technical ownership, and continuous improvement. We are an equal opportunity employer committed to diversity, inclusion, and psychological safety.