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Posted 4 months ago

Senior GUI developer - Equities Technology

@ Citi Canada Technology Services ULC

Mississauga, Ontario

HybridFull-time6+ years experience
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Overview

Citi Canada Technology Services ULC is hiring a Senior GUI developer for its Equities Technology group. The role builds React and TypeScript web applications, contributes to architecture, and works with front office and product teams. It requires 6-10 years of experience and offers a salary range of $120,800 to $170,800.

Responsibilities:

  • Design, develop and maintain React and TypeScript web apps
  • Manage application state with Redux and middleware
  • Write unit tests with Vitest for high coverage
  • Build reusable UI components across feature apps
  • Contribute to front end architecture and best practices

Requirements summary:

  • 6-10 years of experience with React, Redux and WebSockets
  • Hands-on HTML5, CSS3, TypeScript and JavaScript
  • Unit testing with Jest or React Testing Library
  • Experience with RxJS, Web Workers and build tools
  • Good communication and stakeholder management skills
  • Bachelor's degree or equivalent experience

Tools & skills

Source and dates

Employer career site / ATS feed · workday

Employer posting date
2026-07-20
First seen by our source
2026-10-08
Source record updated
2026-10-16

These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.

Job details

SenioritySenior
DepartmentSoftware development
Experience6+ years
Hours per week40 (estimated)
Travelair: none · ground: none
Work settingOffice
PositionMostly sitting
Physical demandsphysical low · computer high
LanguagesEnglish
EducationBachelor’s degree (preferred)

Summary and details written by AI from the posting; the employer’s posting is the authority.

Citi Canada Technology Services ULC

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Job description

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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