Javascript developer css Work, Jobs in London, England (with Salaries)

FX Client Platforms - Senior UI Software Engineer (Vice President)
Citi —London
- Full-time
- Hybrid work
- Mentoring
- AI
- Communication skills
- Annual leave
- Employee assistance programme
7d
Hubspot Platform Specialist
1st Formations —London
- Full-time
- Hybrid work
- Analysis skills
- Mentoring
- APIs
Senior Application Engineer
Sportradar —London
- Full-time
- Computer Science
- English
- Bachelor's degree
Quick apply
Senior Sales Engineer
Zendesk —London
- Full-time
- Computer Science
- Master's degree
- Bachelor's degree
14d
Smart Automation Consultant - Power Platform
Talan —London
- Full-time
- CRM software
- JavaScript
- Mentoring
Quick apply
GCP Architect
PA Consulting —London
- Full-time
- DevOps
- Machine learning
- Mentoring
- Annual leave
Senior Analytics Engineer
PlayStation Global —London
- AWS
- Bachelor's degree
- Business
Quick apply
Power Platform and Integrations Manager (Hands-on Delivery)
ClientEarth —London
- £56,991 a year
- Full-time
- Hybrid work
- SharePoint
Quick apply
12d
Senior Solution Consultant
dotdigital —London
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Senior Developer - Salesforce Marketing Cloud
MAP —London
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Senior Accessibility Tester
Atos —London
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Technical Search Director
Croud —London
- £66,400 - £76,150 a year
- Hybrid work
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- Training & development
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- Life insurance
Quick apply
7d
Manager - Salesforce Marketing Cloud Development
MAP —London
- Mentoring
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Quick apply
Technical Lead (AI & MACH)
AKQA —London
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Optimisation Manager
VML/WPP Enterprise Solutions —London
- Agile
- Analytics
Quick apply
7d
Senior Engineering Lead, Index Distribution
London Stock Exchange Group —London
- Full-time
- Hybrid work
- AWS
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- Mentoring
Optimisation Manager Contract
VML/WPP Enterprise Solutions —London
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Optimisation Manager Contract
VML —London
- Hybrid work
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FX Client Platforms - Senior UI Software Engineer (Vice President)

Citi -
London

Apply Now

Job details

Full-time
7 days ago

Benefits

Annual leave
Company pension
Employee assistance programme
Private medical insurance
Employee discount
Life insurance

Qualifications

Performance tuning
UI development
React
Mentoring junior staff
Test automation
Test-driven development
UI design
CI/CD pipelines
Continuous integration
REST
Mentoring
GitHub
Front-end development
Kafka
Business requirements
AI
Software development or architecture experience
Communication skills

Full job description

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 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.

Job Overview

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 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-AP2

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.

Apply Now

Refine Your Search

javascript developer css jobs in london, england

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

Hubspot Platform Specialist

Senior Application Engineer

Senior Sales Engineer

Smart Automation Consultant - Power Platform

GCP Architect

Senior Analytics Engineer

Power Platform and Integrations Manager (Hands-on Delivery)

Senior Solution Consultant

Senior Developer - Salesforce Marketing Cloud

Senior Accessibility Tester

Technical Search Director

Manager - Salesforce Marketing Cloud Development

Technical Lead (AI & MACH)

Optimisation Manager

Senior Engineering Lead, Index Distribution

Optimisation Manager Contract

Optimisation Manager Contract

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