Senior UI Developer

📍 Job Overview

Job Title: Senior UI Developer

Company: Citi

Location: 5900 HURONTARIO STREET MISSISSAUGA, Ontario, Canada

Job Type: FULL_TIME

Category: Applications Development / UI Development

Date Posted: 2025-06-12T00:00:00

Experience Level: Senior (5-10 years)

Remote Status: On-site

🎨 Role Summary

• Lead the design and development of high-performance user interfaces for Citi's FI eTrading platform, focusing on global spread products.
• Translate complex business requirements from the electronic trading domain into intuitive and efficient user experiences, leveraging expertise in UI technologies like Angular, JavaScript, TypeScript, .Net, WPF, HTML, and CSS.
• Collaborate closely with cross-functional technology teams to make key architectural and design decisions for the build-out of global eTrading and Algo platforms, ensuring seamless integration and optimal performance.
• Drive the adoption of best practices in UI development, including code reviews, continuous integration, and adherence to Citi's engineering standards, contributing to the overall improvement of software architecture and development processes.

🖼️ Primary Responsibilities

• Analyze and collaborate on technical solutions and strategies with the team, providing optimal UI solutions for clients within the eTrading domain.
• Lead systems analysis, design, coding, unit testing, and other Software Development Life Cycle (SDLC) activities specifically related to user interface development.
• Perform rigorous code and design reviews consistently to ensure the quality, maintainability, and performance of UI components and applications.
• Communicate continually with clients and project teams to clarify user interface needs, present technical ideas, and explain progress on UI development efforts.
• Contribute to continuous improvement by suggesting enhancements to UI software architecture, development processes, and the adoption of new technologies relevant to front-end development.
• Strictly follow Citi’s engineering standards and ensure these are consistently applied across all UI modules and projects.

🎓 Skills & Qualifications

Education: Bachelor’s degree/University degree or equivalent experience in a relevant technical field.

Experience: 5-10 years of experience in designing, building, testing, maintaining, and supporting large-scale, high-performance UI applications. Demonstrated experience in following good development standards and practices is essential.

Required Skills:

• Expert level proficiency in UI Technologies: Angular, Javascript, TypeScript, .Net, WPF, HTML, and CSS.
• Strong experience in distributed applications and architecture, particularly as it relates to front-end integration and performance.
• Expertise in design, development, performance tuning, and troubleshooting of complex UI applications.
• Thorough understanding of real-time communication between UI and backend systems using protocols like HTTP and WebSockets.
• Familiarity and experience in implementing styles based on UX designs and collaborating with UX/UI designers.
• Excellent interpersonal and communication skills for effective collaboration within a multi-region team and with stakeholders.
• Proven analytical and problem-solving skills, with the ability to operate with limited direct supervision.

Preferred Skills:

• Previous experience delivering electronic trading solutions, demonstrating an understanding of the specific challenges and requirements of this domain.
• Previous experience in the financial industry, with knowledge of products such as Bonds, US Treasuries, CDS/CDX, which will provide valuable business context for UI development.
• Experience working as part of a large, multi-region technology team, highlighting the ability to navigate complex organizational structures and communication challenges.

🎨 Portfolio & Creative Requirements

Portfolio Essentials:

• While a traditional design portfolio focusing purely on visual aesthetics may not be the primary requirement, candidates should be prepared to showcase examples of complex UI architectures they have built, highlighting performance optimizations and robust code structures.
• Demonstrate experience in translating technical requirements and complex data into clear and functional user interfaces, potentially through code samples or architectural diagrams.
• Include examples of how you have implemented styles based on UX designs, showcasing your ability to work effectively with design specifications and ensure visual fidelity and usability.
• Be prepared to discuss technical challenges encountered during UI development and the solutions implemented, focusing on performance, scalability, and real-time data handling.

Process Documentation:

• Be ready to articulate your UI development process, from understanding requirements and collaborating with designers to coding, testing, and deployment.
• Discuss your approach to handling real-time data streams and ensuring efficient updates in the user interface, demonstrating your understanding of performance considerations in financial applications.
• Explain your methods for collaborating with backend developers and other team members in a multi-region environment, highlighting your communication and coordination skills.

💵 Compensation & Benefits

Salary Range: Based on industry data for Senior UI Developer roles in Toronto/Mississauga, Ontario, the estimated salary range is typically between CAD $90,000 and CAD $140,000 annually. This estimate is based on factors such as experience level, specific technical skills (especially in financial technology), and the cost of living in the Greater Toronto Area. This is an estimate, and the actual salary may vary based on qualifications and negotiation.

Benefits:

• Comprehensive health benefits package (medical, dental, vision), standard for a large financial institution like Citi.
• Retirement savings plans (e.g., pension plan, 401k equivalent) with potential company matching contributions.
• Paid time off, including vacation, sick leave, and holidays, providing work-life balance.
• Professional development opportunities, including training programs and support for obtaining relevant certifications to enhance technical skills.
• Potential for performance-based bonuses or incentives, common in the financial services industry.

Working Hours: Full-time position, typically standard business hours. Flexibility may be required based on project deadlines and collaboration with global teams in different time zones, which is characteristic of a large financial institution. The nature of supporting eTrading platforms may occasionally require work outside of standard hours for critical releases or support issues.

🎯Team & Company Context

🏢 Company & Design Culture

Industry: Financial Services. Citi is a global leader in banking, offering a wide range of financial products and services.

Company Size: 10,001+ employees (over 195,000 globally). Working at a large institution like Citi means being part of a vast network with extensive resources and opportunities for collaboration across diverse teams and geographies.

Founded: 1812. With over 200 years of history, Citi has a long-standing presence in the financial markets, bringing stability and established processes to its operations.

Team Structure:

• The role is within the FI eTrading team, focused on electronic trading platforms for global spread products.
• The team is likely structured around agile methodologies, with cross-functional collaboration between UI developers, backend developers, product managers, and potentially UX/UI designers.
• Reporting structure will likely be within the Technology group, reporting to a manager or lead developer focused on the eTrading platform.

Methodology:

• Given the fast-paced nature of eTrading, the team likely utilizes agile development methodologies (e.g., Scrum, Kanban) to deliver solutions quickly and iteratively.
• Emphasis will be placed on rapid prototyping, iterative development, and continuous integration/continuous delivery (CI/CD) pipelines to keep pace with market demands.
• Rigorous testing and validation practices are paramount in financial applications to ensure accuracy, reliability, and compliance with regulations.

Company Website: http://www.citigroup.com

📈 Career & Growth Analysis

Design Career Level: Senior UI Developer. This level typically involves leading technical initiatives, mentoring junior developers, and making significant contributions to the architecture and design of UI applications. The scope of responsibility includes owning features, ensuring code quality, and collaborating with stakeholders to deliver impactful solutions.

Reporting Structure: Likely reports to a Team Lead, Manager, or Director within the Applications Development or FI eTrading Technology department.

Design Impact: The UI team plays a critical role in the eTrading platform's success. Their work directly impacts the user experience, performance, and reliability of the trading interface, which is crucial for traders to execute transactions efficiently and effectively in real-time. The quality of the UI can significantly influence user adoption and overall platform performance.

Growth Opportunities:

• Advancement to a Lead UI Developer or UI Architect role, focusing on setting technical direction and mentoring the team.
• Opportunities to specialize in specific areas of financial technology or eTrading platforms, deepening domain expertise.
• Potential to move into a broader technology leadership or management role within Citi's extensive global technology organization.
• Access to internal training programs and resources to enhance technical skills and explore new technologies relevant to UI development and financial markets.

🌐 Work Environment

Studio Type: Corporate Office Environment. The role is listed as on-site at Citi's Mississauga location.

Office Location(s): 5900 Hurontario St, Mississauga, ON L5R 0B8, Canada.

Design Workspace Context:

• Expect a professional office environment typical of a large financial institution.
• Workspace will likely be collaborative, with opportunities for direct interaction with team members and colleagues from other departments.
• Access to necessary hardware, software, and collaboration tools required for UI development and team communication.

Work Schedule: Full-time, on-site. Standard business hours are expected, with potential for flexibility or extended hours as required by project demands or critical support issues related to the eTrading platform. Being on-site facilitates close collaboration with the team and access to necessary infrastructure.

📄 Application & Portfolio Review Process

Design Interview Process:

• Initial screening call with HR to assess basic qualifications and fit.
• Technical interview(s) focusing on UI development skills, data structures, algorithms, and problem-solving abilities, likely including questions on Angular, TypeScript, and performance optimization.
• Interview(s) with team members or leads to assess technical depth, collaboration skills, and experience with relevant technologies and domains (like financial trading).
• Potentially a coding exercise or technical challenge to evaluate practical UI development skills and problem-solving approach.
• Final interview(s) with hiring managers or directors to discuss experience, career goals, and cultural fit within the team and organization.

Portfolio Review Tips:

• Prepare to discuss complex UI projects you have worked on, focusing on the technical challenges, architectural decisions, and performance considerations.
• Highlight your experience with real-time data handling and optimizing UI responsiveness in demanding applications.
• Be ready to explain your contribution to projects, the tools and technologies used, and how you collaborated with designers and backend developers.
• If possible, showcase examples of code or architectural diagrams that demonstrate your technical expertise in UI development.

Challenge Preparation:

• Review fundamental UI development concepts, including data binding, component architecture, state management, and asynchronous programming.
• Practice coding exercises that involve building interactive UI components, handling real-time data, and optimizing performance.
• Be prepared to discuss your thought process and rationale behind your technical decisions during a coding challenge.

ATS Keywords: Angular, JavaScript, TypeScript, .Net, WPF, HTML, CSS, UI Development, Front-end Development, Software Architecture, Performance Tuning, Real-time Communication, Distributed Systems, Electronic Trading, Financial Services, Capital Markets, Agile, Scrum, Kanban, SDLC, Code Review, Design Patterns, Problem Solving, Collaboration, Communication, Leadership, Mentoring, Unit Testing, Integration Testing, Troubleshooting, WebSockets, HTTP, UX Implementation, Data Visualization, Trading Platform, Financial Technology (FinTech), Object-Oriented Programming (OOP), SOLID principles, Version Control (e.g., Git), CI/CD, Test-Driven Development (TDD), Behaviour-Driven Development (BDD).

🛠 Tools & Technology Stack

Primary Design Tools:

• Angular: Core framework for building dynamic single-page applications, requiring expertise in component-based architecture and state management.
• JavaScript & TypeScript: Essential for front-end logic and application development, with TypeScript providing strong typing for improved code maintainability and scalability.
• .Net & WPF: Relevant for legacy or specific desktop UI components within the eTrading platform, indicating a need for proficiency in Microsoft development environments.
• HTML & CSS: Foundational technologies for structuring and styling web interfaces, requiring expertise in responsive design and cross-browser compatibility.

Collaboration & Handoff:

• Likely uses standard corporate collaboration tools such as Microsoft Teams, Slack, or similar platforms for team communication and project coordination.
• Version control systems like Git are essential for managing code changes and facilitating collaboration within the development team.
• Project management tools (e.g., JIRA, Azure DevOps) are likely used for tracking tasks, managing sprints, and coordinating development efforts.

Research & Testing:

• Unit testing frameworks relevant to Angular and .Net (e.g., Jest, Karma, NUnit) will be used to ensure code quality and prevent regressions.
• Integration testing and potentially end-to-end testing frameworks may be utilized to validate the interaction between UI components and backend services.
• Performance monitoring tools will likely be used to identify and address bottlenecks in the UI, ensuring optimal responsiveness for traders.

👥 Team Culture & Values

Design Values:

• Emphasis on building robust, reliable, and performant user interfaces that meet the demanding requirements of financial trading.
• Focus on delivering intuitive and efficient user experiences that enable traders to make quick and informed decisions.
• Value placed on technical excellence, clean code, and adherence to established engineering standards.
• Culture of continuous improvement, encouraging team members to explore new technologies and methodologies to enhance the UI platform.

Collaboration Style:

• Collaborative environment with strong interaction between UI developers, backend engineers, product managers, and potentially business stakeholders.
• Expect regular team meetings, code reviews, and knowledge-sharing sessions to ensure alignment and foster collective problem-solving.
• Cross-functional collaboration is key to the success of the eTrading platform, requiring effective communication and coordination across different teams and geographical locations.

⚡ Challenges & Growth Opportunities

Design Challenges:

• Building and maintaining high-performance UI applications that can handle real-time data streams and low-latency requirements of electronic trading.
• Translating complex financial concepts and trading workflows into intuitive and user-friendly interfaces.
• Integrating with diverse backend systems and ensuring seamless data flow and communication between the UI and core trading engines.
• Keeping up with evolving UI technologies and best practices while adhering to strict security and compliance standards within the financial industry.

Learning & Development Opportunities:

• Opportunity to deepen expertise in financial markets and electronic trading platforms, gaining valuable domain knowledge.
• Exposure to cutting-edge technologies and architectural patterns used in high-frequency and low-latency trading environments.
• Opportunities to mentor junior developers and contribute to the growth of the UI development team.
• Access to Citi's extensive training resources and programs for continuous technical skill development.

💡 Interview Preparation

Design Process Questions:

• Be prepared to discuss your experience in the full UI development lifecycle, from requirement analysis to deployment and support, providing specific examples from past projects.
• Explain your approach to performance optimization in UI applications, particularly in scenarios involving real-time data and high user interaction.
• Discuss how you approach troubleshooting and debugging complex UI issues in a distributed system environment.

Company Culture Questions:

• Research Citi's values and recent initiatives, and be prepared to discuss how your skills and experience align with the company's goals and culture.
• Discuss your experience working in collaborative team environments, particularly in large organizations or multi-region teams.
• Highlight your ability to adapt to fast-paced environments and handle pressure, which is relevant to the financial trading domain.

Portfolio Presentation Strategy:

• Focus on demonstrating your technical expertise in UI development through discussions of complex projects and technical challenges overcome.
• If presenting code or architectural diagrams, be prepared to explain your design choices and the rationale behind them.
• Clearly articulate your role and contributions to past projects, emphasizing your impact on performance, reliability, and user experience.

📌 Application Steps

To apply for this design position:

• Submit your application through this link
• Customize your resume to highlight relevant UI development experience, technical skills (Angular, TypeScript, .Net, etc.), and any experience in the financial industry or with real-time data applications.
• Prepare to discuss your most impactful UI projects, focusing on the technical challenges you solved and the results achieved.
• Research Citi and their eTrading platform to demonstrate your interest and understanding of the business context.