Full Stack Senior Engineer
Citi
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Job summary
Citi is seeking a Full Stack Senior Engineer in Mississauga, Ontario, offering a hybrid role. You will lead applications development, design microservices, and guide teams across time zones to deliver scalable software within a regulated environment.
Responsibilities include architecture alignment, coding standards, risk assessment, and mentoring junior staff while collaborating with stakeholders to meet business goals.
Qualifications
- 6+ years of experience in the Financial Service industry.
- Designing microservices and distributed architecture enterprise applications.
- Hands‑on proficiency in React, TypeScript, and modern JavaScript (ES2022+).
- Strong Agile/Scrum experience with Sprint planning.
- Experience with Cloud/IaaS/PaaS, UI/UX, and SOA/Microservices.
- Experience in regulated industries is preferred.
Responsibilities
- Partner with management to integrate functions and deploy product enhancements.
- Resolve high impact problems through analysis of business and system processes.
- Provide expertise in application design and ensure alignment with architecture blueprint.
- Develop standards for coding, testing, debugging, and implementation.
- Understand how architecture and infrastructure integrate to achieve goals.
- Provide in-depth analysis and innovative solutions.
- Mentor mid-level developers and analysts, assigning work as needed.
- Manage risk and ensure compliance with laws, rules, and Citi policies.
Skills
Education
Tools
Job description
26996118
Mississauga, Ontario, Canada
Hybrid
Sep. 25, 2026
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, you’ll have the opportunity to grow your career, give back to your community and make a real impact.
The Full Stack Senior Engineer is responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis and programming activities.
- Partner with multiple management teams to ensure appropriate integration of functions to meet goals as well as identify and define necessary system enhancements to deploy new products and process improvements
- Resolve variety of high impact problems/projects through in-depth evaluation of complex business processes, system processes, and industry standards
- Provide expertise in area and advanced knowledge of applications programming and ensure application design adheres to the overall architecture blueprint
- Utilize advanced knowledge of system flow and develop standards for coding, testing, debugging, and implementation
- Develop comprehensive knowledge of how areas of business, such as architecture and infrastructure, integrate to accomplish business goals
- Provide in-depth analysis with interpretive thinking to define issues and develop innovative solutions
- Serve as advisor or coach to mid-level developers and analysts, allocating work as necessary
- Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.
- 6+ years of relevant experience in the Financial Service industry
- Experience in designing microservices and distributed architecture enterprise applications.
- Demonstrated hands-on technology proficiency in:
- Agile/ Scrum development methods and good understanding of Sprint planning.
- Technologies: Java/ JEE, Cloud/ IaaS/ PaaS, UI/UX & SOA/ Micro Services, Spring, Microservices, Angular/React
- Deployment tools such as: Jenkins, Git/ BitBucket, Junit, RLM, JIRA, SonarQube, Selenium/Automated testing
- Relational and non-Relational databases (e.g.: Oracle, DB2, Mongo, MySQL)
- Proven track record building and scaling design systems used across multiple business units or product lines.
- Experience in regulated industries (financial services, healthcare, or government) strongly preferred.
- Background working within distributed teams across time zones, including offshore delivery partners.
- Expert proficiency in React (v18+), TypeScript, and modern JavaScript (ES2022+); familiarity with Vue or Angular a plus.
- Deep understanding of micro-frontend architectures (Module Federation, single-spa), SSR/SSG patterns (Next.js), and CSR optimization strategies.
- Experience as Applications Development Manager
- Stakeholder and people management experience
- Demonstrated leadership skills
- Proven project management skills
- Basic knowledge of industry practices and standards
- Consistently demonstrates clear and concise written and verbal communication
- Bachelor’s degree/University degree or equivalent experience
- Master’s degree preferred
This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.
Technology
Applications Development
Full time
$120,800.00 - $170,800.00
Please see the requirements listed above.
For complementary skills, please see above.
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.
View Citi's EEO Policy Statement and the Know Your Rights poster.
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