Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and jurisdictions. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management. As a bank with a brain and a soul, Citi creates economic value that is systemically responsible and in our clients’ best interests.

As a financial institution that touches every region of the world and every sector that shapes your daily life, our Operations & Technology teams are charged with a mission that rivals any large tech company. Our technology solutions are the foundations of everything we do from keeping the bank safe, managing global resources, and providing the technical tools our workers need to be successful to designing our digital architecture and ensuring our platforms provide a first‑class customer experience. Our commitment to diversity includes a workforce that represents the clients we serve from all walks of life, backgrounds, and origins.

We value and demand respect for others, promote individuals based on merit, and ensure opportunities for personal development are widely available to all. We are seeking a Senior Front-end Developer to join the Markets Technology division where they will take primary ownership of the front-end development of a trade processing application supporting Security Financing Transactions across Fixed Income, Markets Treasury, and Finance business lines. This is a full-stack-capable role with a heavy front-end emphasis, requiring deep proficiency in .NET/C# alongside modern UI frameworks particularly React.

The ideal candidate will bring 5+ years of hands‑on experience building and modernizing enterprise‑grade web applications,



with a strong preference for those who have worked in financial services or capital markets environments. You will operate as a subject matter expert collaborating closely with cross‑functional technology teams and senior stakeholders to deliver scalable, compliant, and well‑tested UI solutions. Design and deliver front‑end web applications for a trade processing platform supporting Security Financing Transactions across Fixed Income and Markets Treasury business lines.

Take primary ownership of the UI development lifecycle, from requirements gathering through implementation and post‑deployment support. Migrate and transform legacy Citi UI components into React‑based HTML5 interfaces using standard Citi design components. Ensure all front‑end development is delivered with fully automated testing and adherence to good design standards throughout.

Monitor and control all phases of the development process, including analysis, design, construction, testing, and implementation. Conduct feasibility studies, produce time and cost estimates, and contribute to IT planning activities relevant to the application. Analyze complex technology problems, evaluate business and system processes against industry standards, and provide sound technical recommendations.

Recommend and implement security measures as part of post‑implementation reviews to ensure successful system design and functionality. Consult with business users, clients, and cross‑functional technology teams to advise on advanced programming solutions and resolve technical issues. Track business unit performance against IT plans and service level agreements, identifying and escalating gaps as needed.





Assess risk in technology and business decisions, ensuring compliance with applicable laws, regulations, and Citigroup policies. Operate with a high degree of autonomy and independent judgment while supporting senior stakeholders across the organization. 5+ years' experience in UI or full‑stack development, with a strong focus on front‑end engineering. ~ NET and C#, with demonstrated experience building or supporting enterprise‑grade applications. ~ Proficiency in React; Solid command of HTML5, CSS3, and JavaScript as core front‑end technologies. ~ Experience with test frameworks and a commitment to fully automated testing practices. ~ Knowledge of TypeScript is preferred. ~ Experience with JSON/XML data formats and REST API‑based web service integrations. ~ Strong self‑motivation, attention to detail, and the ability to operate independently with limited supervision. Bachelor's degree in Computer Science, Engineering, related field or equivalent professional experience.

Full time Primary Location Full Time Salary Range $We 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. Our automated processing and AI do not involve relying on automatic or autonomous decision‑making. 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 chance review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster. #

📌 Senior Front-end Developer (.NET/C#) (Toronto)
🏢 Citi
📍 Toronto