FX Client Platforms - Senior UI Software Engineer (Vice President)

Citigroup Inc.; Greater London; On-site; GBP 90,000 - 150,000; Full time

Benefits offered by this job

27 days annual leave

Discretional annual bonus

Private Medical Care & Life Insurance

Pension Plan

Employee Learning & Development

Parental Leave

Employee discounts

Job summary

Citi London is seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange business. You will cover the full software development lifecycle—from analysis to testing—while providing technical leadership to the team.

The role focuses on building high-quality trading GUIs, interoperability via FDC3 and REST/WebSocket APIs, and bringing AI-assisted development into the workflow. Hybrid work, competitive salary and extensive benefits await.

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.
• Experience with desktop containers (Chromium, Electron, OpenFin) and FDC3 interoperability.
• Experience with real-time messaging systems (Kafka/Solace/Tibco).
• Experience with CI/CD pipelines (Jenkins) and Agile methodologies.

Responsibilities

• Design and develop high-quality trading GUIs for internal and external traders.
• Define interoperability standards across web apps using FDC3; REST/WebSocket APIs.
• Drive AI integration in the development lifecycle and tooling.
• Influence performance engineering, profiling, and low-latency data delivery.
• Contribute to architecture decisions for large-scale front-end systems and design system adoption.
• Mentor junior engineers and collaborate with UI leads, UX, Product and Sales.

Skills

TypeScript

React

HTML5

CSS

JavaScript (ES6+)

CI/CD pipelines (Jenkins)

Agile methodologies

Real-time messaging systems

WebSocket APIs

AI-assisted development tools

OpenFin / Interop

FDC3 interoperability

Kafka / Solace / Tibco

Tools

Chromium

Electron

OpenFin

FDC3

Job description

FX Client Platforms - Senior UI Software Engineer (Vice President)

About the Role

We are seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange (FX) business. You will cover the full software development lifecycle — analysis, design, implementation, and testing — while providing technical leadership to the team.

Primary 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. Experience with OpenFin or Interop is desirable but not essential.
• Drive AI integration within the development lifecycle — including AI-assisted coding, automated test generation, and intelligent monitoring
• Influence performance engineering across the UI stack: profiling, rendering optimisation, bundle analysis, and low-latency data delivery
• Contribute and influence architecture decisions for large-scale front-end systems, including monorepo governance and design system adoption across globally distributed teams
• Champion best practices in TDD, code review, and AI-assisted development tooling (e.g., GitHub Copilot)
• Liaise with UI leads, UX, Product, and Sales groups to translate business requirements into robust technical solutions
• Mentor junior engineers and contribute to team growth and delivery standards

Essential Experience

• Solid experience building and deploying complex web application platforms in production
• Expert-level proficiency in **TypeScript, React, HTML5, CSS, and JavaScript (ES6+)**
• Demonstrated 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

Desirable

• Experience building real-time trading platforms
• FX or Fixed Income product knowledge
• Java REST API development experience
• Familiarity with AI-assisted development tools

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

What we’ll provide you

By joining Citi London, 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 ourGlobal Benefitspage 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.

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Job Family:

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.

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