Role
Senior Frontend Engineer with a strong React/TypeScript background, solving hard UI challenges. You’ll own the UI of our next-generation Developer Platform @ Citi. You’ll be working on creating a near real-time UI application, solving cutting-edge UI problems, and data-visualisations. You’ll collaborate closely with other Software Engineers and the Product team to create bleeding-edge interfaces.
You’ll be joining a small, high-impact team challenging, changing, modernising and enhancing the experience of our 50,000 engineers globally throughout Citi's SDLC, using tools such as Claude Sonnet, Agent, Github Co-pilot, Cognition Devin.
Where you’ll work
You’ll sit within Development Enablement, part of Citi’s CTO organisation – a group focused on innovation, developer platforms and internal tools. We operate like a startup inside a global bank: shipping fast and experimenting.
Your first 90 days
* First steps: You will have built UI components of high quality (e.g. testing, storybook, etc) that have shipped to production.
* Network: Have an established network of UI engineers across the organisation to contribute and learn about best practice.
* Design thinking: Begun designing a UI architecture (maybe micro-front end) that links many components into a single view, such as connecting a JIRA ticket to a deployment in production.
* Scaling up: Get buy-in from the team on architectural principles, ways of working and system requirements; for example, separating core logic from the framework in the UI; using Zustand as the data layer; aiming for UI responses to actions in under 100ms.
By the end of your first year
* Ownership: Own the UI implementations of complicated UI components with excellent component libraries, testing practices, and architectures.
* Boundary pushing: Implement advanced UI capabilities used by thousands, such as micro front ends, plugin architectures, or advanced data-visualisations in D3.
* Thought leader: Be a valued contributor to cross-team UI practice and help teach other UI engineers at scale.
What will you bring?
* Strong expertise (5–10+ years) building modern frontend applications with React and TypeScript.
* Proficiency in JavaScript, React (or another UI framework), and TypeScript.
* Experience with state management libraries (redux, context API, zustand) for building well-structured applications.
* Experience with websockets or event-streaming.
* Experience with micro front-ends desirable.
* Experience with Storybook or componentised development.
* Push the boundaries in animation and data visualisation with tools like d3.js, reactflow or three.js.
* Ability to innovate: push the boundaries in UI engineering to build next-gen developer platforms.
Tools and technologies you might use
* React, TypeScript, Vite, Storybook, internal design systems
* State management: Zustand, context API, redux
* Micro front-ends
* Mac or PC – choice is yours
* Access to AI tools such as GitHub Copilot and Cognition.ai Devin
Why you’ll love working here
* You’ll shape the daily experience of tens of thousands of engineers at one of the world’s largest engineering organisations.
* You’ll work in a small autonomous team with impact across our global organisation.
* You’ll combine world-class engineering skills to push boundaries others can’t and change the way internal platforms are made.
What we’ll provide you
By joining Citi Belfast, you will be part of a business casual workplace with a hybrid model (up to 2 days at home per week), and receive a competitive base salary with benefits such as:
* 27 days annual leave (plus bank holidays)
* Discretionary 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 learning and development resources
Visit our global benefits page to learn more. Citi is an equal opportunity employer and considers qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any characteristic protected by law.
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