Citi

We're seeking a Senior Frontend Engineer with a strong React/TypeScript background, passionate about crafting exceptional AI product experiences. You'll own the user-facing layer of our nextgeneration Developer Productivity platform @ Citi, transforming complex AI capabilities - from chat interfaces to rich data visualizations - into intuitive, trustworthy experiences. You'll collaborate closely with other AI, Software Engineers and the Product team to leverage bleeding-edge Generative AI.

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 (Software Development Life Cycle).

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 used across the bank, where we experiment and ship fast, like a startup inside a global bank. Our mission is to transform developer productivity saving our engineers tens of minutes per day, equating to £10,000,000s of savings at Citi’s scale

Your first 90 days - become a citizen within Developer Enablement's AI & UX

By the end of your third month, you will have:

• Released to production a small new or enhanced AI-first user interface that will have positively impacted the lives of thousands of Software Engineers and Business Analysts working in Software Requirements Engineering.
• Started raising the bar in our React.JS codebase introducing better componentisation, testing, storybook.
• Have an established network of UI engineers across the organisation to contribute and learn about best practice.
• 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 Generated by Stylus Workspaces Internal Use Only 2 UI; using Zustand as the data layer; we also may decide that we want the UI to respond to any action in under 100ms.

By the end of your first year

At this point, you will have an opinionated view on the specific challenges that AI-first UI design & engineering challenges are, helping younger members of the team as well as other specialists to understand how to collaborate better to support high-standard UI engineering.

By the end of this first year, you will have:

• Owned and championed the implementation of best practices for interaction design within the team, establishing clear guidelines for AI-specific UX patterns.
• Mentored junior engineers on best practices for designing and implementing AI-driven user interfaces.
• Designed & implemented production-grade features for AI solutions.
• Contributed with AI-specific UX expertise to solving problems that require AI expertise.
• Helped scoping and planning future AI development work.
• Further expanded our suite of eval metrics & techniques to simplify Agentic-AI dev.
• Consistent interactions with Engineering Leads across CTO to unblock shipping to prod.
• Represented Developer Enablement with regards to our AI-specific UX to stakeholders on multiple occasions.

What will you bring?

Here’s a list of what makes you a stronger fit to join our team:

• 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 wellstructured applications.
• Experience with storybook or componentised development.
• Proficiency in implementing streaming and real-time experiences (e.g., word/token streaming, live updates, progress/status indicators). Generated by Stylus Workspaces Internal Use Only 3
• Strong understanding of frontend architectures, state management, performance optimisation, and responsive design.
• Hands-on experience with any tools like LangChain / LangGraph / Vercel AI SDK / Google ADK (Agent Development Kit).
• Familiarity with CI/CD tools (e.g.: Jenkins, Tekton, ArgoCD, Harness, etc).

Tools and technologies you might use

• React, TypeScript, Next.js/Vite, storybook, internal design systems LangChain, Vercel AI SDK, LangGraph, Google ADK (Agent Development Kit).
• Mac or PC - it's up to you.
• Access to time-saving AI tools such as GitHub Copilot and Cognition.ai's Devin.

What we’ll provide you

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 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

Visit our Global Benefits page to learn more.

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.

#LI-RH4

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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 opportunity review Accessibility at Citi.

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