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Senior GUI Developer

Citigroup

On-site
Mississauga, ON
Full-time
Senior
6+ yrs
Salary not listedPosted 3w ago

Real job — pulled straight from Citigroup’s careers page · Verified July 24, 2026 · No reposts.

Job description

Citigroup is hiring a Senior GUI Developer — a full-time, based in Mississauga, ON role. Apply directly on Citigroup's careers page below.

Senior GUI developer - Equities Technology

Location: Mississauga, Ontario, Canada

Employment Type: Regular

This role is for a Senior GUI developer in Citi Equities Technology. As a senior developer you will work together with front office, product development and members of development team to provide solutions that improve efficiency, decrease operational risk, and enable the business to expand.

The candidate should possess strong analytical and technical ability with 6-10 years' experience in React, Redux, websockets and cutting-edge web technologies. Candidate should be able to work independently as well as being a team player, with good communication skills and stake holder management.

Responsibilities:

  • Design, develop and maintain web apps using React and TypeScript, ensuring high quality, clean and maintainable code.
  • Manage application state using redux and middleware such as redux toolkit.
  • Ensure high test coverage by writing unit tests using Vitest.
  • Write and maintain a suite of reusable UI components which can be used across different feature apps.
  • Contribute to the overall application architecture and provide inputs on front end frameworks, design patterns and best practices.
  • Perform code reviews and contribute to overall quality, maintainability and testability of software developed.
  • Be a self-starter and plan/schedule own work for tasks and projects, implement functionality without direct supervision.
  • Work closely with teams to form good working culture and continuously adapt to different working environment.

Requirements:

  • Hands on HTML5, CSS3/SASS/CSS in JS, Core JavaScript, Typescript 
  • Hands on React, React hooks
  • Unit Testing with Jest, React-testing-library
  • Application State Management with Redux, Recoil, React Context
  • Reactive Apps with RxJS, Web Sockets, Web workers
  • Build Tools like Webpack/Vite etc
  • Debugging skills, Code performance, Bench Marking
  • Container based development like Electron
  • RESTful APIs, JWT, NodeJS, Express JS

Nice to have:

  • Exposure to Bitbucket, Jenkins, Artifactory, Confluence
  • MongoDB, AMPS Server - should be able to query
  • Workspace tools – npm workspace, Micro Frontend, ESLint/TSLint
  • Docker management, Openshift containers
  • Experience working with other UI frameworks such as Angular

Education:

  • Bachelor’s degree/University degree or equivalent experience


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

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Primary Location Full Time Salary Range:

$120,800.00 - $170,800.00

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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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.

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Frequently asked questions

What skills are required for Senior GUI Developer at Citigroup?

The required skills for Senior GUI Developer at Citigroup include: React, Redux, TypeScript, HTML, CSS, JavaScript, Jest, REST, Node.js, Express.js, Bitbucket, Jenkins, Confluence, MongoDB, Docker, OpenShift, Angular.

What is the seniority level for Senior GUI Developer at Citigroup?

Senior GUI Developer at Citigroup is a Senior level position.

How do I apply for Senior GUI Developer at Citigroup?

You can view the full description and apply for Senior GUI Developer at Citigroup on EchoJobs: https://echojobs.io/job/citigroup-senior-gui-developer-equities-technology-s33jn.