Job Description

XiP is building a next-generation cross-asset calculation system for Citi trading desks and enterprise users in the largest global financial markets and exchanges in New York, London, and other major financial hubs.Team & Role OverviewOur team owns multiple Java Spring Boot Services that execute, partition, and track quantitative risk graphs/trades in a distributed environment. These graphs can fail due to their complexity and our system must adapt quickly to these failures to provide a seamless experience for clients.XiP Compute Services are deployed onto OpenShift and Amazonxe2x80x99s Elastic Kubernetes Service (EKS). An important initiative in 2025 will be onboarding Googlexe2x80x99s Kubernetes Engine to further expand our coverage. Our system scales on-demand, and we can run up to tens of thousands of replicas of our services across all asset classes.The role of the Senior Technical Lead is to lead a variety of engineering activities including design decisions regarding technical direction of the platform with short, medium, and long-term changes, with a key focus on public cloud onboarding.The project requires constant review of the technologies, patterns and paradigms used to ensure the system is easy to understand, performant, scalable, testable, robust, and observable. The role is a conjunction of technical and managerial roles, with line-management duties, while giving technical direction to a growing team of developers globally.The platform is a Greenfield build using standard modern technologies such as Java, Spring Boot, Kubernetes, Kafka, MongoDB, RabbitMQ, Solace, Apache Ignite. The platform runs in a hybrid mode both on-premise and in AWS utilising technologies such as EKS, S3, FSX.The main purpose of this role is to lead efforts of continued platform onboarding to AWS as well as the new initiative to deploy into to GCP. The project is in a scale-out phase, with a goal of expanding the userbase and workloads towards running billions of financial calculations per day across hundreds of thousands of cores. The aim of the project is to run all finance calculations for Citixe2x80x99s Front Office Markets business globally.Responsibilities:xc2xb7 Steering platform onboarding into AWS and Google Cloud, while collaborating with Citi HPC team and AWS/Google partnersxc2xb7 Challenging proposed and provided solutions in terms of performance, robustness and cost effectivenessxc2xb7 Making decisions regarding technical direction of platform, including evaluating new technologies and executing proof-of-concept implementations, with good understanding of various limitationsxc2xb7 Identifying and defining necessary system enhancements to improve current processes and architecturexc2xb7 Hands-on coding of fixes, features, and improvementsxc2xb7 Investigating reported or observed platform issuesxc2xb7 Reviewing pull-requests from other team members and giving robust critique/feedbackxc2xb7 Identifying and proposing teamwork enhancementsxc2xb7 Reviewing requests for new features, balancing user requirements with defending the platform from complexity and low-value featuresxc2xb7 Collaborating with key partners across the firm for extending the platform, such as: the infrastructure provider group; quant group; upstream and downstream systemsxc2xb7 Mentoring/coaching junior developers on coding/architecture approaches and best practicesSkills and Experience:xc2xb7 Expert knowledge of distributed systems including event-driven architecture; at-least-once messaging; CAP Theorem; horizontal and vertical scaling strategies; massively distributed architecturesxc2xb7 Expert knowledge of Java, JVM, memory management, garbage collectionxc2xb7 Thorough understanding of multithreaded environment challengesxc2xb7 Expert knowledge of Spring, SpringBoot framework and associated technologiesxc2xb7 Expert knowledge of test frameworks, such as Junit, Mockito, writing easily-testable codexc2xb7 Expertise in Java debugging, including remote debugging of services deployed to K8sxc2xb7 Expert knowledge of Kubernetes and associated technologies such as KEDA, Karpenter, ClusterAutoscaler, CoreDNS,xc2xb7 Expert knowledge of SQL and/or NoSQL database technologiesxc2xb7 Expert knowledge of various messaging protocols and technologies such as REST, HTTP/S, AMQP, WebSocketxc2xb7 Expert knowledge of Confluent Kafkaxc2xb7 Experience and good understanding of core technologies provided by GCP/AWS, such as S3, FSX, EKS, SQS, SNS, Kinesis, AmazonMQ, DynamoDB, GKE, CloudStorage, PubSub, Filestore,xc2xb7 Knowledge of modern observability technologies such as ELK, Splunk, Prometheus, Grafana, Micrometerxc2xb7 xe2x80x9cWhat-ifxe2x80x9d thinking, while designing or reviewing solutions, to foresee or catch potential problems as early in the development process, as only possibleNice to have:xc2xb7 Good knowledge of Python, Groovy, Bashxc2xb7 C++ basic knowledge/experiencexc2xb7 Good knowledge of PubSub modelxc2xb7 Good knowledge of Finance, especially large-scale risk calculationxc2xb7 Good knowledge of representing complex calculations as graphs of instructions which can be horizontally distributedWhat we can offer youWe work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live well and save well.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:

• Generous holiday allowance starting at 27 days plus bank holidays; increasing with tenure

• A discretional annual performance related bonus
• Private medical insurance packages to suit your personal circumstances
• Employee Assistance Program
• Pension Plan
• Paid Parental Leave
• Special discounts for employees, family, and friends
• Access to an array of learning and development resources

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.Sounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.Job Family Group: TechnologyJob Family: Applications DevelopmentTime Type: Full timeCiti is an equal opportunity and affirmative action employer.Qualified applicants will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.Citigroup Inc. and its subsidiaries ("Citixe2x80x9d) invite all qualified interested applicants to apply for career opportunities. 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 .View the " " poster. View the .View the .View the

Citigroup