Senior UI Engineer; DevEx), VP

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.

We’re seeking a Senior Frontend Engineer with a strong React/Type Script background, passionate about solving hard UI challenges. You’ll own the UI of our next‑generation Developer Platform 'll be working on creating a near real‑time UI application, solving cutting‑edge UI problems, and even making 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 & enhancing the experience of our 50,000 engineers globally throughout Citi's SDLC, all whilst using the latest coding tools (e.g., Claude Sonnet, Agent, Github Co‑pilot, Cognition Devin).

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.

• 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‑frontend) that takes into consideration linking together many components into a single view, such as being able to connect 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: you might choose to separate core logic from the framework in the UI; using Zustand as the data layer; we also may decide that we want the UI to respond to any action in under 100 ms.

• Ownership:
  You’ll own the UI implementations of complicated UI components and push the boundaries of good practice with excellent component libraries, good testing practices, and beautiful architectures.
• Boundary pushing:
  You will have implemented advanced UI capabilities used by over 1,000s, such as micro front‑ends, plugin‑architectures, or advanced data visualisations in D3.
• Thought leader:
  You will be noted as a valuable contributor to UI cross‑team through your knowledge of UI and have taught other UI engineers about UI at scale.

• Strong expertise (5‑10+ years) building modern frontend applications with React and Type Script.
• Proficiency in JavaScript, React (or another UI framework), and Type Script.
• Experience with state management libraries (Redux, Context API, Zustand) for building well‑structured applications.
• Experience with websockets or event‑streaming.
• Experience with micro front‑end 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:
  Excited to push the boundaries in UI engineering to build next‑gen developer platforms.

• React, Type Script, Vite, storybook, internal design systems.
• State management:
  Zustand, Context API, Redux.
• Micro front‑ends like single‑sp a.
• Mac or PC – it's up to you.
• Access to time‑saving AI tools such as Git Hub Copilot and Cognition.ai's Devin.

• You’ll shape the daily experience of tens of thousands of engineers at one of the largest engineering organisations in the world.
• You’ll work in a small autonomous team, with impact across our global organisation.
• You’ll get to combine your world‑class engineering skills to push boundaries others can't and change the way internal platforms are made.

By joining Citi Belfast, 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…