Senior UI Developer (.NET/React)

Discover your future at Citi. Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.
Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Join a team where your work influences economies, your ideas drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and build the future of finance with Citi Tech.
We are looking for a senior UI developer proficient in .NET/C# to join teams transforming Citi UI elements into React‑based HTML5 ones, using standard Citi components and ensuring fully automated testing and good design throughout.
Responsibilities
Design and deliver front end web applications based on business requirements
Complete Front‑end design and coding in a timely manner by understanding user requirements
Solving complex technology problems / projects for the business unit supported
Track business unit performance against the IT business plan and service level agreements; identify gaps
Appropriately assess risk when business 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 regarding personal behaviours, conduct and business practices, and escalating, managing and reporting control issues with transparency
Conduct tasks related to feasibility studies, time and cost estimates, IT planning, risk technology, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas
Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users
Utilize in‑depth specialty knowledge of applications development to analyze complex problems/issues, provide evaluation of business process, system process, and industry standards, and make evaluative judgement
Recommend and develop security measures in post implementation analysis of business usage to ensure successful system design and functionality
Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems
Ensure essential procedures are followed and help define operating standards and processes
Serve as advisor or coach to new or lower level analysts
Operate with a limited level of direct supervision
Exercise independence of judgment and autonomy
Act as SME to senior stakeholders and/or other team members
Recommended Qualifications
Relevant working experience in Windows and Web UI Development
Proficiency in .NET/C# and React
Solid understanding of HTML5, CSS3, JavaScript, knowledge of test frameworks
Strong sense of responsibility, self‑motivation, attention to detail and a positive attitude
Preferred skills
JSON/XML and REST API based web service integrations
Knowledge of TypeScript
Education
Bachelor’s degree/University degree or equivalent experience
This job description provides a high‑level review of the types of work performed. Other job‑related duties may be assigned as required.
We use automated processing, including artificial intelligence, for our legitimate business interests 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.
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