Senior FX UI Engineer — Hybrid Real-Time Trading Frontend

Citigroup Inc.; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

27 days annual leave

Discretional annual bonus

Private Medical Care & Life Insurance

Employee Assistance Program

Pension Plan

Paid Parental Leave

Staff discounts for employees

Job summary

Citigroup Inc. in London is seeking a Senior UI Software Engineer (VP) to lead the development of pricing solutions for the FX business.

You will own the full software lifecycle, providing technical leadership and mentoring junior engineers across globally distributed teams. The role emphasizes expert TypeScript/React/HTML5/CSS/JavaScript (ES6+), AI-assisted coding, and strong collaboration with UI leads, UX, Product, and Sales.

Qualifications

• Solid experience building and deploying complex web application platforms in production.
• Expert-level proficiency in TypeScript, React, HTML5, CSS, and JavaScript (ES6+).
• Experience profiling and optimising high throughput React applications (Web Workers, virtual rendering, memory management).
• Experience with desktop containers: Chromium, Electron, or OpenFin; familiarity with FDC3 for cross-application interoperability.
• Experience with real-time messaging systems: Kafka, Solace, or Tibco.
• Experience with CI/CD pipelines (Jenkins or equivalent) and Agile methodologies.
• Strong communication skills with experience in globally distributed teams.

Responsibilities

• Design and develop high-quality trading GUIs providing compelling user experiences for internal and external traders.
• Define and enforce interoperability standards across web applications using FDC3 and REST/WebSocket APIs.
• Drive AI integration within the development lifecycle including AI-assisted coding and automated test generation.
• Influence performance engineering across the UI stack including profiling and low-latency data delivery.
• Contribute to architecture decisions for large-scale front-end systems and design system adoption across distributed teams.
• Champion best practices in TDD, code review, and AI-assisted development tooling.

Skills

TypeScript

React

HTML5

CSS

JavaScript ES6

Web Workers

Profiling

Memory management

CI/CD

Agile

TDD

Communication

Tools

Chromium

Electron

OpenFin

FDC3

Kafka

Solace

Tibco

Jenkins

Job description

Citigroup Inc. in London is seeking a Senior UI Software Engineer (VP) to lead the development of pricing solutions for the FX business.

You will own the full software lifecycle, providing technical leadership and mentoring junior engineers across globally distributed teams. The role emphasizes expert TypeScript/React/HTML5/CSS/JavaScript (ES6+), AI-assisted coding, and strong collaboration with UI leads, UX, Product, and Sales.