We are seeking a highly skilled and motivated server side application developer to play a key role on a greenfield multiyear transformation program aimed at modernizing and scaling the electronic FX Options Trading Business Responsibilities: Contribute to the design and development of the electronic FX Options Trading Platform specializing in: RFQ (Request for Quote) client or sales to trader workflow Streaming prices Trade booking and lifecycle management Volatility Surface and other market data management Structured Product Pricing workbench Collaborate with a global team of server side and front end developers, quants and traders to translate business requirements into robust technical solutions Drive the design and development of system architecture, work with users of the system to enhance the quality and functionality of deliverables Contribute to the continuous improvement of development, deployment and testing processes Share your knowledge and mentor other developers, fostering a collaborative and innovative team environment Required Skills: Advanced knowledge and experience of C# development in an event-driven architecture. Equivalent experience using Java would also be considered Proficient in multithreading, concurrency and performance tuning Solid understanding of inter-application communication using REST, WebSocket or middleware like Solace/Kafka/Tibco Proficiency in CI/CD, application resiliency, testing, profiling, and telemetry Awareness of industry trends and leveraging new technologies as appropriate Experience working in Linux environments Nice to have: Java or Python experience Kubernetes and working with containers Experience working in finance is a plus, but not required This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What we'll provide you By joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resources Visit ourGlobal Benefitspage to learn more. Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Job Family Group: Technology Job Family: Applications Development Time Type: Full time Most Relevant Skills Please see the requirements listed above. Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.