Contract Full Stack Java Developer Jobs in Toronto, ON

The Applications Development Technology Lead Analyst is a senior level position 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, expanding and modernizing the OMC technology platform.

• 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 a variety of high impact problems/projects through in depth evaluation of complex business processes, system processes, and industry standards.
• Provide expertise in application 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.
• Lead the technical design, architecture, and development of complex applications, ensuring adherence to best practices, coding standards, and architectural patterns.
• Guide and mentor a team of developers, fostering a collaborative and high performing environment; conduct code reviews, provide constructive feedback, and support professional growth.
• Effectively communicate technical concepts and project status to both technical and non-technical stakeholders, including senior management.
• Develop common, reusable components and services, adhering to Citi’s best practices.
• Design and develop high-performance, low-latency applications within existing Citi frameworks.
• Ensure the reliability, scalability, and performance of developed components.
• Adopt an engineering mindset, thoroughly understanding use‑cases, estimating volume and compute velocity requirements, and openly discussing implementation challenges and solutions.
• Actively contribute to system design and architectural decisions.
• Evaluate new strategic initiatives through Proof‑of‑Concepts (POCs) and transition successful concepts into robust, industrial‑grade solutions.
• Provide post‑release support to business, development, and support teams.
• Develop applications adhering to best practices, including Test‑Driven Development (TDD), high unit test coverage, and Continuous Integration (CI).

• 8+ years of hands‑on Java development experience, including Spring, real‑time messaging, and associated Java frameworks.
• Proven experience developing and maintaining highly scalable, real‑time microservices and RESTful APIs.
• Proficiency in ReactJS and core front‑end technologies: HTML5, CSS3, JavaScript (ES6+), Redux.
• Experience with real‑time messaging middleware (e.g., Kafka, RabbitMQ, Solace, Tibco).
• Hands‑on experience with database technologies, including RDBMS (e.g., Oracle) and NoSQL (e.g., MongoDB).
• Strong fundamentals in software development, data structures, design patterns, Object‑Oriented Programming (OOP), architecture, algorithms, and problem‑solving.
• Experience with in‑memory datastore/cache libraries (e.g., Redis, Apache Ignite, Gemfire).
• Exposure to Kotlin.
• Experience with system performance tuning and low‑latency Java programming.
• Experience working with multi‑threaded applications.
• Experience with CI/CD pipelines.
• Test‑driven development, including Unit and End‑to‑End Testing.
• Strong verbal and written communication skills; ability to interface with business users.
• Self‑motivated individual with determination to achieve goals.
• Willingness to learn, both technically and professionally.
• Strong analytical and problem‑solving skills.
• Good team working skills and ability to thrive in a distributed global team environment.
• Ability to work in a fast‑paced environment; flexible and able to deliver quality results within required timeframes.
• 6‑10 years of relevant experience in Apps Development or systems analysis role.
• Extensive experience system analysis and in programming of software applications.
• Experience in managing and implementing successful projects.
• Subject Matter Expert (SME) in at least one area of Applications Development.
• Ability to adjust priorities quickly as circumstances dictate.
• Demonstrated leadership and project management skills.
• Consistently demonstrates clear and concise written and verbal communication.

• Bachelor’s degree/University degree or equivalent experience.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or other protected characteristics.