UI Developer (.NET/React) (AVP) in Belfast

Job ID: 95080386576

Posted: 2026-07-13

Location: Belfast, Northern Ireland, United Kingdom

Category: Technology, Applications Development

Company: Citi

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. Look to join a team where your work helps influence economies, your ideas can 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 get the opportunity to 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.
• Responsible for completing Front-end design and coding in a timely manner by understanding user requirements.
• Solves complex technology problems/projects for the business unit supported.
• Tracks business unit performance against the IT business plan and service level agreements; identifies 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.
• 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.
• Has the ability to operate with a limited level of direct supervision. Can exercise independence of judgement and autonomy. Acts 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 details 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.

What we’ll provide you:

• By joining Citi, 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.

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.