Senior Java Full Stack Developer

Citi; Mississauga; On-site; CAD 133,000 - 200,000; Full time

Job summary

Citi in Mississauga, Canada, is seeking a JAVA Full Stack Senior Developer to contribute to designing, building, and deploying scalable enterprise applications. The role spans front-end React.js components and back-end Java Spring Boot microservices, with RESTful APIs and MCP services for AI agents.

You will deploy in Citi's cloud environments (OpenShift/Kubernetes/AWS), collaborate with cross-functional teams, and stay ahead with emerging technologies including Generative AI.

Qualifications

• 6+ years of professional experience in full-stack software development.
• Experience designing micro-service-based applications.
• Strong hands-on with modern JavaScript (React.js) and TypeScript.
• Deep proficiency in Java and Spring Boot for enterprise microservices.
• Experience with cloud platforms (AWS/Azure/GCP) and containers (Docker, Kubernetes, OpenShift).
• Familiarity with CI/CD pipelines (Jenkins, GitHub Actions).
• Ability to work under pressure and manage deadlines.
• Interest or experience in Generative AI and agent-based systems is highly desirable.

Responsibilities

• Utilize Java Spring Boot and React.js to deliver high-quality software solutions.
• Design, develop, test, and deploy end-to-end solutions including front-end and microservices.
• Architect RESTful APIs and MCP services for AI agent consumption.
• Deploy and manage applications in Citi's cloud environments (OpenShift, Kubernetes, AWS).
• Collaborate with product managers, designers, and engineers to translate requirements into technical solutions.
• Evaluate new technologies and AI applications to solve business problems.
• Ensure code quality, reusability, and maintainability.
• Assess risk and ensure compliance with laws and regulations.

Skills

Java

Spring Boot

React.js

TypeScript

Microservices

Cloud AWS

Kubernetes OpenShift

CI/CD Jenkins

REST APIs

AI interest

Education

Bachelor's degree

Tools

OpenShift

AWS

Kubernetes

Jenkins

GitHub Actions

Oracle DB

Job description

The JAVA Full Stack Senior Developer role is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities.

Responsibilities

• Utilize mature programming methodologies and languages, including Java Spring Boot and React.js, to deliver and maintain high-quality software solutions.
• Design, develop, test, and deploy end-to-end solutions, from responsive React.js front-end components to resilient Java Spring Boot microservices.
• Architect and implement RESTful APIs and expose backend functionality as MCP (Model Context Protocol) services to be consumed by AI agents.
• Deploy and manage applications within Citi's cloud environment (leveraging OpenShift/Kubernetes and AWS), integrating with cloud-native storage like S3 and enterprise databases like Oracle as a Service (OraaS).
• Partner with and contribute to a cross-functional team of product managers, designers, and other engineers to translate business requirements into high-quality technical solutions.
• Evaluate and recommend new and emerging technologies, including the application of AI, to solve complex business problems.
• Ensure software components are designed and implemented to be of high quality, reusable, and easily maintainable.
• 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.
• Conduct tasks related to feasibility studies, time and cost estimates, IT planning, risk technology, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas
• Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users
• Utilize in-depth specialty knowledge of applications development to analyze complex problems/issues, provide evaluation of business process, system process, and industry standards, and make evaluative judgement
• Recommend and develop security measures in post implementation analysis of business usage to ensure successful system design and functionality
• Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems
• Ensure essential procedures are followed and help define operating standards and processes
• Serve as advisor or coach to new or lower-level analysts
• Has the ability to operate with a limited level of direct supervision.
• Can exercise independence of judgement and autonomy.
• Acts as SME to senior stakeholders and /or other team members.
• 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.

Qualifications

• Excellent communication and collaboration skills, with the ability to articulate complex technical concepts to diverse audiences.
• 6+ years of professional experience in full-stack software development, with a proven track record of delivering complex, large-scale, enterprise-level applications
• 6+ years of hands‑on experience designing micro-service-based application
• Strong hands‑on experience with modern JavaScript frameworks, specifically React.js and TypeScript, for building sophisticated user interfaces
• Deep proficiency in Java and the Spring Boot framework for building enterprise‑grade microservices
• Low‑latency, scalable, high‑throughput API development (Spring Boot, Hibernate/JPA)
• Hands‑on experience with a major cloud platform (AWS, Azure, or GCP) and containerization technologies (Docker, Kubernetes, OpenShift). Familiarity with CI/CD pipelines (Jenkins, GitHub Actions) is essential.
• Problem‑solving, troubleshooting, and clean code (Core Java, J2EE, Collections, Multithreading)
• API integration (third‑party libraries, security)
• 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
• A strong interest or prior experience in Generative AI, Large Language Models (LLMs), and agent‑based systems is highly desirable.
• Demonstrated analytical and problem‑solving skills with the ability to propose and implement effective solutions

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

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.

Job Opening Status

This job opening is for an existing job vacancy.

EEO and Disability Accommodation

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.