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Citi Logo Citi · IT - Software Development

Front End (UI) Software Engineer

United Kingdom, London · Job Posted February 16, 2026
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Job Description

The team require a specialist in UI Engineer exp React, Typescript and JavaScript) to join a low-latency systems and application framework engineering team (skilled in Java, AWS, Docker, Kubernetes, Git, CI/CD Pipeline). The HPA organisation (High Performance Architecture) are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology.

Job Responsibility

  • Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
  • Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
  • Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
  • Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
  • Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
  • Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
  • Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
  • Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency

Requirements

  • Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development from design to deployment
  • Passion for coding excellent, commercial grade, mission critical user facing applications and frameworks
  • Proficiency in building and maintaining user interfaces with React.js including an understanding of hooks, contexts and state management
  • Strong experience with Typescript including type inference, interfaces, generics and an ability to integrate those with React to ensure type safety
  • Solid knowledge of modern HTML/CSS techniques including responsive design
  • Knowledge of building and interacting with RESTful API's
  • Proficiency in using unit and integration test frameworks (Jest, Cypress etc)
  • Working knowledge of CI/CD tooling and cloud based deployments
  • Experience in implementing projects independently
  • Great communicator with high EQ
  • Ability to occasionally produce clear diagrammatic documentation and model key aspects appropriate diagrammatic tooling
  • May have a desire to learn Java and work closely with server side application/framework teams
  • Relationship and consensus building skills

Nice to have

  • Experience with terraform is a plus
  • Demonstrates understanding of Kubernetes/Openshift tuning, including HPA and VPA
  • Experience with Next.JS would be beneficial but not essential

What we offer

  • 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
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