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Senior GUI developer - Equities Technology

ExperiencedNo visa sponsorship
Citi logo

at Citi

Bulge Bracket Investment Banks

Posted 12 days ago

No clicks

**Senior GUI Developer - Equities Technology** Design, develop, and maintain React & TypeScript web apps, ensuring high-quality, clean code. Collaborate with teams to enhance efficiency and decrease operational risk. Manage application state using Redux, write unit tests, and contribute to application architecture.Must-have 6-10 years' experience with React, Redux, and advanced web technologies. Must be proficient in HTML5, CSS3/SASS/CSS in JS, JavaScript, and TypeScript. Good communication skills and stakeholder management abilities necessary. Full-time hybrid role in Mississauga, Ontario, Canada.

Compensation
$120,800 – $170,800 USD

Currency: $ (USD)

City
Mississauga
Country
Canada

Full Job Description

Senior GUI developer - Equities Technology

Apply (opens in new window)
Save

Job Req Id:

26981136

Location(s):

Mississauga, Ontario, Canada

Job Type:

Hybrid

Posted:

Jul. 21, 2026

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, youll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

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:

  • Bachelors 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.

------------------------------------------------------

Job Family Group:

Technology

------------------------------------------------------

Job Family:

Applications Development

------------------------------------------------------

Time Type:

Full time

------------------------------------------------------

Primary Location Full Time Salary Range:

$120,800.00 - $170,800.00

------------------------------------------------------

Most Relevant Skills

Please see the requirements listed above.

------------------------------------------------------

Other Relevant Skills

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

------------------------------------------------------

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.

------------------------------------------------------

This job opening is for an existing job vacancy.

------------------------------------------------------

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( opens in new window).

View Citis EEO Policy Statement( opens in new window) and the Know Your Rights( opens in new window) poster.

Apply (opens in new window)
Save

Senior GUI developer - Equities Technology

Compensation

$120,800 – $170,800 USD

City: Mississauga

Country: Canada

Citi logo
Bulge Bracket Investment Banks

12 days ago

No clicks

at Citi

ExperiencedNo visa sponsorship

**Senior GUI Developer - Equities Technology** Design, develop, and maintain React & TypeScript web apps, ensuring high-quality, clean code. Collaborate with teams to enhance efficiency and decrease operational risk. Manage application state using Redux, write unit tests, and contribute to application architecture.Must-have 6-10 years' experience with React, Redux, and advanced web technologies. Must be proficient in HTML5, CSS3/SASS/CSS in JS, JavaScript, and TypeScript. Good communication skills and stakeholder management abilities necessary. Full-time hybrid role in Mississauga, Ontario, Canada.

Full Job Description

Senior GUI developer - Equities Technology

Apply (opens in new window)
Save

Job Req Id:

26981136

Location(s):

Mississauga, Ontario, Canada

Job Type:

Hybrid

Posted:

Jul. 21, 2026

Discover your future at Citi

Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, youll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

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:

  • Bachelors 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.

------------------------------------------------------

Job Family Group:

Technology

------------------------------------------------------

Job Family:

Applications Development

------------------------------------------------------

Time Type:

Full time

------------------------------------------------------

Primary Location Full Time Salary Range:

$120,800.00 - $170,800.00

------------------------------------------------------

Most Relevant Skills

Please see the requirements listed above.

------------------------------------------------------

Other Relevant Skills

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

------------------------------------------------------

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.

------------------------------------------------------

This job opening is for an existing job vacancy.

------------------------------------------------------

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( opens in new window).

View Citis EEO Policy Statement( opens in new window) and the Know Your Rights( opens in new window) poster.

Apply (opens in new window)
Save