React Front End Commodities Application Developer, Citi

Citi

Location:
United Kingdom, London

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Not provided

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Job Description:

The Applications Development Senior Programmer Analyst is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities.

Job Responsibility:

Develop responsive, high performance web application using React.js and related libraries to deliver exceptional user experience for risk management application
work with Ag-grid and implement complex functionalities using Ag-grid version 31+
debug and implement event-driven workflows using RxJs
translate design mockups and wireframes into interactive and visually appealing user interfaces
create reusable React components and libraries to facilitate rapid development and ensure consistency
implement state management such as Redux or Recoil
integrate frontend components with RESTful APIs
identify and address performance bottlenecks in the application including rendering optimizations, code splitting and lazy loading techniques
write clean, well documented code following best practices and coding standards
conduct unit tests and integration tests
stay updated with latest trends and developments in the frontend technology, especially React ecosystem

Requirements:

Proven experience as a front end React developer, with proficiency in React.js and State management (Redux/Recoil/Mobx/Context API etc)
solid understanding of React Hooks and functional components
knowledge of performance optimization techniques such as memoization and useCallback
hands on experience in C#, good to have WPF and MVVM
familiarity with popular react component libraries such as MaterialUI, Ant Design or Semantic UI
solid hands-on experience with Typescript for static typing and improved code maintainability in React projects
solid hands on experience working with AG Grid, clear understanding of CSRM/SSRM/Viewport RM/Full RM
solid understanding of web technologies including HTML5, CSS3 and Javascript ES6+
experience with front end tools such as Webpack, Babel, Yarn, Npm etc.
experience in integrating RESTful APIs and handling async operations
experience with UI/UX design principles and building wireframes
strong problem-solving skills and ability to troubleshoot complex React-related issues
experience with C#, ideally with desktop as well as web-services and .Net core and distributed micro-services-based architectures
experience with UI test automation framework such as Playwright, Cucumber etc.
a good understanding of async programming. Functional programming experience useful
knowledge of MongoDB or other NoSQL databases and general SQL experience useful
experience in a Continuous Integration / Continuous Delivery and Automated Deployment environment with tools such as Jenkins, TeamCity, uDeploy
prior experience working with WPF is useful
knowledge of banking or financial service is a plus

Nice to have:

knowledge of banking or financial service
experience with UI test automation framework such as Playwright, Cucumber etc.
knowledge of MongoDB or other NoSQL databases
general SQL experience

Additional Information:

Job Posted:
September 18, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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React Front End Commodities Application Developer