Front End (UI) Software Engineer (Fullstack)

Citi; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

27 days annual leave

Performance bonus

Private medical care

Employee Assistance Program

Pension plan

Parental leave

Employee discounts

Learning & development resources

Job summary

Citi in London is seeking a senior Front End Software Engineer to lead the architecture, design, and implementation of scalable UI platforms with strong fullstack capabilities. You will establish enterprise-grade frontend standards, guide component libraries and design systems, and mentor delivery teams across the software lifecycle.

Collaboration with product, UX, and backend engineers is essential to align with strategic goals.

Qualifications

• Extensive experience in UI/Frontend engineering and enterprise web apps.
• Strong backend integration experience with REST/GraphQL.
• Proven track record delivering complex tech projects in Agile/Scrum.

Responsibilities

• Lead frontend architecture and development of scalable web applications.
• Define UI standards, component reuse, and CI/CD practices.
• Mentor teams across the software delivery lifecycle.
• Collaborate with product, UX, and backend teams for integration.

Skills

React/TS ecosystem

UI/Frontend engineering

Backend integration

Design Systems

Leadership

Tools

React

TypeScript

Next.js

Angular

Job description

Position Summary

The Front End (UI) Software Engineer is a senior-level position responsible for establishing, architecting, and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis, frontend architecture, and fullstack programming activities.

This role specifically focuses on leading the development of scalable, secure, and modern Front End (UI) digital platforms with Fullstack capabilities. The lead engineer will set architectural standards for enterprise-grade web applications, drive UI component libraries and design system adherence, establish best practices for API integration and backend services, and mentor development teams across the software delivery lifecycle.

Key Responsibilities

Technical Leadership & Core Applications Development

• Architectural Alignment & System Design: Provide expertise in frontend/fullstack applications programming and ensure application design strictly adheres to the overall enterprise architecture blueprint, security standards, and technology roadmap.
• Standards & Engineering Governance: Utilize advanced knowledge of system flow to develop and enforce robust standards for UI coding, component reusability, testing automation, debugging, performance profiling, and CI/CD deployment.
• Frontend & UI Engineering: Lead the architecture and implementation of responsive, accessible (WCAG 2.1 AA), and performant web applications using modern frameworks (e.g., React, TypeScript, Next.js/Angular) and enterprise design systems.
• Fullstack Integration & API Design: Lead end-to-end integration by designing, consuming, and optimizing RESTful APIs, GraphQL endpoints, Backend-for-Frontend (BFF) layers, and microservices (e.g., Node.js, Java/Spring Boot, or Python).
• Cross-Functional Collaboration: Partner with multiple management teams, product owners, UX/UI designers, and backend engineering teams to ensure appropriate integration of functions to meet business goals, identifying and defining necessary system enhancements to deploy new products and process improvements.
• Complex Problem Solving: Resolve a variety of high-impact problems and complex projects through in-depth evaluation of complex business processes, system processes, data flows, and industry standards.
• Cross-Domain Integration: Develop comprehensive knowledge of how areas of business—such as enterprise architecture, infrastructure, cloud platforms, and security—integrate to accomplish strategic business goals.
• Innovative Solution Delivery: Provide in-depth analysis with interpretive thinking to define critical technical issues and engineer innovative, resilient solutions.

Risk Management, Governance & Controls

• Risk & Compliance Safeguarding: Appropriately assess risk when business and technical 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.
• Security & Data Privacy: Ensure all developed user interfaces and application workflows adhere to rigorous enterprise cyber security standards (e.g., SSO/OAuth2/OIDC, XSS/CSRF mitigation, secure session management, and vulnerability remediation).

Recommended Qualifications

• Experience: Extensive relevant professional experience in an Applications Development or systems analysis role, with demonstrated expertise in UI/Frontend engineering and fullstack delivery.
• Technical SME: Subject Matter Expert (SME) in at least one core area of modern frontend development (e.g., React/TypeScript ecosystem, Micro-frontends, Design Systems, State Management) with strong working competency in backend integration (Node.js, Java, Python, or REST/GraphQL APIs).
• System Analysis & Implementation: Extensive experience in software systems analysis, programming, and architecture of enterprise web applications.
• Project & Delivery Track Record: Proven track record of managing and successfully delivering complex, high-impact technology projects within an Agile/Scrum framework.
• Adaptability: Demonstrated ability to adjust priorities quickly and effectively as business and technical circumstances dictate.
• Leadership Skills: Demonstrated technical leadership, project coordination, and mentoring skills.
• Communication: Consistently demonstrates clear, concise, and professional written and verbal communication skills across technical and executive stakeholders.

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

• 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.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Most Relevant Skills

Please see the requirements listed above.

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