UI Developer

Citigroup Inc.; Dublin; Hybrid; EUR 71,000 - 107,000; Full time

Job summary

Citigroup Inc. in Dublin, Ireland, is seeking a UI Developer to evolve the Lightspeed user interface. You will work across Angular and React applications, delivering dashboards, visualisations and editors, with a focus on clean, tested frontend code.

The role involves collaboration with Product and Design in a Kanban, continuous-delivery environment, and includes AI-assisted development tools usage. The position offers hybrid working arrangements (up to 2 days at home per week) and a competitive

Qualifications

• Strong frontend/UI development background with solid engineering fundamentals.
• Hands-on Angular (v18+) and React (v18+) experience in complex codebases.
• Expert TypeScript skills with modern development practices.
• Proficient in HTML5, CSS3 and responsive design.
• Experience with Git workflows, PRs, rebasing and code reviews.
• Experience writing/maintaining unit & integration tests (Jest, Cypress, etc).
• Experience integrating with REST APIs and AI coding assistants.
• Knowledge of clean code, SOLID, and separation of concerns.
• Comfortable in Kanban, CD environments, and cross-functional collaboration.
• Excellent written and spoken English; strong communication.

Responsibilities

• Build, enhance and maintain high-quality UI solutions across Lightspeed.
• Develop user-facing features like dashboards, visualisations and editors.
• Write clean, maintainable, well-tested frontend code.
• Diagnose issues with users and engineers; deliver effective fixes.
• Contribute to performance, usability, and architecture improvements.
• Use AI-assisted development tools responsibly and verify code.
• Collaborate with Product, Design and Engineering to meet needs.

Skills

Angular (v18+)

React (v18+)

TypeScript

HTML/CSS

Git

Testing

REST APIs

AI coding tools

Clean code / SOLID

Kanban / CD

Communication

English

Education

Bachelors/Equivalent in CS or related

Tools

Tekton

Jenkins

Harness

TeamCity

Job description

About the Team
Lightspeed is Citi's flagship CI/CD platform used daily by 10,000+ engineers across the bank. Built using Citi technology and open-source components, it supports the engineering teams delivering technology at scale.

You’ll join a collaborative UI chapter working on a clean, well-maintained codebase, building the next generation of user experiences for dashboards, pipeline visualisations and configuration editors.

We value ownership, curiosity and continuous improvement, with AI-assisted development tools forming part of our engineering workflow.

The Role

We’re looking for a UI Developer to help build and evolve the user-facing experience of Lightspeed.

You’ll work across modern Angular and React applications, solving complex engineering challenges and delivering intuitive, reliable interfaces. This is an opportunity to work on a platform used by thousands of engineers, contribute to meaningful technical improvements and develop your expertise within a supportive engineering team.

You’ll work closely with developers, Product and Design in a hands-on environment where asking questions, sharing ideas and understanding the code you deliver are encouraged.

Key Responsibilities

• Build, enhance and maintain high-quality UI solutions across Lightspeed, working through a Kanban-based delivery model.
• Develop user-facing features including dashboards, pipeline visualisations and configuration editors.
• Write clean, maintainable and well-tested code across complex frontend applications.
• Work with users and engineering colleagues to diagnose issues and deliver effective solutions.
• Contribute to technical improvements across performance, usability, architecture and code quality.
• Use AI-assisted development tools responsibly, ensuring you understand, validate and test the code you deliver.
• Stay curious about emerging technologies and contribute ideas that improve the platform and how the team works.
• Collaborate with Product, Design and Engineering to deliver solutions that meet user and business needs.

Key Skills & Experience

• Strong professional experience in frontend/UI development, with solid software engineering fundamentals and confidence working in complex codebases.
• Strong hands-on Angular experience, including modern Angular (v18+). The Lightspeed application currently runs on Angular v21.
• Good experience with React (v18+), including hooks, context and state management.
• Strong TypeScript skills, including strict typing and modern development practices.
• Proficiency in HTML5, CSS3 and responsive design, including Flexbox and Grid.
• Experience with Git, including branching, pull requests, rebasing and code review workflows.
• Practical experience writing and maintaining unit and integration tests, using tools such as Jest, Karma, Cypress or Playwright.
• Experience integrating with REST APIs.
• Practical experience using AI coding assistants such as Devin, Claude Code, Codex, GitHub Copilot or Cursor
• Understanding of clean code, SOLID principles and separation of concerns.
• Comfortable working in a Kanban, continuous-delivery environment and collaborating across Product, Design and Engineering.
• Strong communication skills and a willingness to ask questions, share ideas and continuously improve.
• Good working English, both written and spoken.

Additional Experience (Valued, Not Essential)

• Exposure to CI/CD platforms or developer tooling, such as Tekton, Jenkins, Harness or TeamCity.
• Experience with design systems, shared component libraries or frontend architecture patterns such as Nx.
• Background working in enterprise technology, financial services or regulated environments.

What we can offer you

By joining Citi Dublin, 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 that support you (and your family) to be well, live well and save well. Discover more here. (opens in new window)

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 energised to join us, motivated to stay, and empowered to thrive.

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Primary Location Full Time Salary Range:

€71,440.00 - €107,160.00

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.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster.