Senior Full Stack Java Developer

Citigroup Inc.; Mississauga; On-site; CAD 94,000 - 142,000; Full time

Job summary

Citi is seeking a Senior Full Stack Developer to join the Oracle Ledger Program. You will design, develop, and maintain full stack applications, building frontend interfaces and backend services to support Citi's financial systems at scale.

You will lead the end-to-end development lifecycle, provide L3 support in a global delivery model, and collaborate with cross-functional teams to translate requirements into efficient engineering solutions, including automated Selenium tests to ensure quality

Qualifications

• Bachelor's degree or equivalent professional experience.
• Experience in full stack engineering across enterprise applications.
• Proficiency in Java backend development and REST APIs.

Responsibilities

• Design, develop, and maintain full stack applications for the Oracle Ledger Program.
• Build and enhance common services and user interfaces using Java, Angular or React, and REST APIs.
• Lead the full development lifecycle from analysis, design, construction, testing, and implementation.
• Provide L3 technical support as part of a global delivery model.
• Collaborate with business users and cross-functional teams to translate requirements into technical solutions.
• Develop and implement automated test coverage using Selenium.
• Define and uphold engineering standards for a maintainable codebase.
• Mentor junior developers and act as SME for senior stakeholders.

Skills

Full stack development

Java backend

Angular or React

Automated testing

Project management

Production support

Education

Bachelor's degree or equivalent

Tools

Selenium

REST APIs

Job description

Citi is looking for a Senior Full Stack Developer to join the Oracle Ledger Program, where you will build and maintain the common services and user interfaces that underpin critical financial systems across the organization. In this role, you will work with a high-performing technology team to develop full stack applications, drive technical solutions end-to-end, and provide expert-level support across a global delivery model. This is an opportunity to apply your engineering expertise to systems that directly support Citi's financial infrastructure at scale.

Responsibilities

• Design, develop, and maintain full stack applications for the Oracle Ledger Program, building both frontend interfaces and backend services to meet evolving business requirements.
• Build and enhance common services and user interfaces using Java, Angular or React, and REST APIs, ensuring high-quality, scalable, and maintainable code.
• Lead the full development lifecycle across analysis, design, construction, testing, and implementation to deliver reliable software on schedule.
• Provide L3 technical support as part of an around-the-sun global support model, diagnosing and resolving complex application issues with minimal disruption.
• Collaborate with business users and cross-functional technology teams to translate requirements into practical technical solutions and recommend the most effective engineering approaches.
• Develop and implement automated test coverage using Selenium to validate functionality and protect system integrity across releases.
• Define and uphold engineering standards and best practices, contributing to a consistent and maintainable codebase across the team.
• Act as a subject matter expert for senior stakeholders and teammates, providing technical guidance and mentoring less experienced developers.

Required Qualifications & Skills

• Experience in software development, with a strong focus on full stack engineering across enterprise applications.
• Proficiency in Java for backend development, with demonstrated experience building and consuming REST APIs in production environments.
• Hands‑on experience with Angular or React for building responsive, user‑facing web interfaces.
• Practical experience with Selenium for automated testing, including writing and maintaining test suites that support continuous delivery.
• Proven ability to manage and deliver software projects end‑to‑end, including planning, prioritization, and delivery under deadline pressure.
• Experience providing advanced application support, including root cause analysis and resolution of complex production issues.
• Bachelor's degree in a relevant field or equivalent professional experience.

Beneficial Skills & Qualifications

• Familiarity with Python for scripting, automation, or data processing tasks within an enterprise application context.
• Exposure to Oracle financial systems or ledger‑based platforms, providing useful context for the business domain.
• Experience working within global or follow‑the‑sun support and delivery models across distributed teams.

Recommended Qualifications

• 4+ years of relevant experience
• Experience in systems analysis and programming of software applications
• Experience in managing and implementing successful projects
• Working knowledge of consulting/project management techniques/methods
• Ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements

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.

Job Family Group

Technology

Job Family

Applications Development

Time Type

Full time

Primary Location Full Time Salary Range

$94,300.00 - $141,500.00

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.

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.