Senior Rust/Java Developer — Low-Latency eTrading Controls & Regulatory ReportingThe Applications Development Senior Lead Analyst is a senior level position responsible for designing, building, and delivering the low latency eTrading controls and regulatory reporting platform for the Fixed Income business. The role owns the control that protects every execution: real‐time pre‐trade risk controls at the point of trade, and the regulatory and trade reporting infrastructure that sits on the highest‐integrity data path. The overall objective is to lead the design and delivery of a latency‐aware, audit‐first control and reporting stack that keeps both the firm's trading floor and the regulatory framework safe without compromising execution speed.ResponsibilitiesPartner with Markets eTrading management, trading desks, risk, and compliance to define architecture for real‐time pre‐trade risk controls and the regulatory reporting platform, ensuring integration with existing Firm and Markets technology infrastructure and control frameworksDesign and deliver the latency‐critical control and reporting paths in Rust, owning end‐to‐end design of real‐time pre‐trade risk checks (credit, mandatory/tenor limits, kill switches, price/tick validation) that fire inline on the hot execution pathLead integration and hand‐off with the existing Java‐based trading and reporting stack, bridging the Rust low‐latency control core with the broader Java ecosystem and downstream regulatory systemsBuild and maintain the regulatory reporting infrastructure — including MiFID II / SEC / CFTC trade reconstruction, record‐keeping, and best‐execution reporting — with an audit‐first, append‐only, tamper‐evident design that guarantees data integrity and completeness end to endOwn the latency budget for controls: engineer risk checks and reporting capture so they add minimal, predictable overhead to the execution path, profiling, and tuning hot paths to meet strict latency and throughput SLAsImplement robust detection and escalation for control and reporting failures — including fail‐open versus fail‐closed decisioning, real‐time alerting, and reconciliation of reported versus executed trades — so gaps are surfaced with transparencyServe as advisor and technical lead to the engineering team, allocating work, conducting code reviews, setting engineering standards for safety‐critical, latency‐sensitive control systems,



and championing Rust adoption where it is the right toolAppropriately assess risk when technical and architectural decisions are made, demonstrating consideration for the firm's reputation and safeguarding Citigroup, its clients, and assets, by driving compliance with applicable laws, rules, and regulations, adhering to Policy, applying sound ethical judgment, and escalating, managing, and reporting control issues with transparencyQualifications8+ years of relevant experience in application development, systems programming, or low‐latency platform engineering, ideally within a financial services or electronic trading environmentDeep, production‐grade experience with Rust in latency‐critical, high‐throughput systems — including unsafe code, memory mapping, lock‐free/allocation‐free hot paths, and cross‐platform deployment — combined with strong working knowledge of Java and the ability to bridge the two ecosystemsDemonstrated expertise in low‐latency engineering: kernel and network tuning, busy‐polling, ring buffers, cache‐line optimization, zero‐copy I/O, and quantitative benchmark/measurement methodologiesProven, hands‐on experience in electronic trading controls and regulatory compliance in a market's setting, including pre‐trade risk controls, MiFID II / SEC / CFTC trade and transaction reporting, trade reconstruction, and best‐execution record keepingSubject Matter Expert (SME) in at least one of: real‐time pre‐trade risk and control systems, regulatory/Trade reporting frameworks (MiFID II, EMIR, SEC/CFTC), or high‐integrity, audit‐first data pipelinesExperience owning the full lifecycle of safety‐critical, latency‐sensitive software through design, delivery, and 24/7 operational support, with a rigorous testing discipline (property‐based, chaos, and load testing) and a demonstrable focus on data integrity and reconciliationDemonstrated leadership and project management skills, with a track record mentoring senior and mid‐level engineers and setting engineering standardsAbility to adjust priorities quickly as circumstances dictate in a fast‐paced,



real‐time trading technology environmentConsistently demonstrates clear and concise written and verbal communication, including the ability to translate complex technical controls and regulatory concepts for non‐technical business stakeholdersEducationBachelor's degree/University degree or equivalent experienceMaster's degree preferredJob Family Group:Technology------------------------------------------------------Job Family:Applications Development------------------------------------------------------Time Type:Full time------------------------------------------------------Primary Location Full Time Salary Range:$145,100.00 - $217,700.00------------------------------------------------------Most Relevant SkillsPlease see the requirements listed above.------------------------------------------------------Other Relevant SkillsFor complementary skills, please see above and/or contact the recruiter.------------------------------------------------------Automated Processing and AIWe use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision‐making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.------------------------------------------------------This job opening is for an existing job vacancy.------------------------------------------------------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. #J-18808-Ljbffr

📌 Senior Rust Or Java Developer, Fixed Income Trading, Senior Vice President (Mississauga)
🏢 Citigroup
📍 Mississauga