Senior Full Stack Java Developer Job at Citi (Mississauga)

Senior Full Stack Java Developer

Citi

Location:
Canada , Mississauga

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

94300.00 - 141500.00 USD / Year

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Job Description:

As a Full Stack Development lead within our team, you will take on a critical leadership role, driving the technical direction and successful delivery of mission-critical web applications. You will be responsible for architecting robust systems, mentoring a talented team of engineers, and ensuring the highest standards of code quality and innovation. This role requires a blend of deep technical expertise, strategic thinking, and proven leadership capabilities to guide projects from conception to deployment in a complex, enterprise environment.

Job Responsibility:

Design, develop, and implement new features and functionalities for web applications using Java and related frameworks
Develop and maintain robust back-end services, APIs, and databases, with a strong emphasis on the Spring Boot framework
Implement engaging and responsive user interfaces using modern front-end technologies
Collaborate with cross-functional teams to define, design, and ship new features
Write clean, maintainable, and efficient code following best practices and coding standards
Participate in code reviews to ensure code quality and share knowledge
Troubleshoot, debug, and upgrade existing systems
Contribute to all phases of the development lifecycle, including requirements gathering, design, coding, testing, and deployment
Optimize applications for maximum speed and scalability
Stay up-to-date with emerging technologies and industry trends
Technical Leadership & Architecture: Lead the architectural design and development of complex, scalable, and resilient full-stack applications, with a primary focus on Java, Spring Boot, and modern front-end frameworks
Team Mentorship & Guidance: Mentor, coach, and lead a team of developers, fostering a culture of technical excellence, collaboration, and continuous improvement. Guide team members in code quality, best practices, and career development
Project & Delivery Ownership: Oversee the entire software development lifecycle for key projects, from technical requirements gathering and design to coding, testing, and deployment. Ensure on-time, high-quality delivery
Stakeholder Collaboration: Partner with product managers, business stakeholders, and other technology teams to define technical roadmaps, influence product strategy, and translate business requirements into robust technical solutions
Hands-On Development: Remain hands-on and contribute to the development of complex features, back-end services, and APIs, setting a high standard for the team
Best Practices & Innovation: Champion and enforce software development best practices, including agile methodologies, CI/CD, automated testing, and secure coding standards. Drive the evaluation and adoption of new technologies and industry trends
System Optimization & Health: Take ownership of application performance, scalability, and reliability. Lead efforts to troubleshoot, debug, and optimize existing systems

Requirements:

Strong proficiency in Java and deep, hands-on experience with the Spring ecosystem (Spring Boot, Spring MVC, Spring Data, reactive spring)
Proven experience building and consuming RESTful APIs and designing microservices with Spring Boot
Experience with relational databases (e.g., PostgreSQL, MySQL) and NoSQL databases (e.g., MongoDB)
Solid understanding of data access layers and ORM frameworks like Spring Data JPA/Hibernate
Experience with build tools like Maven or Gradle
Proficiency in modern front-end technologies (e.g., HTML5, CSS3, JavaScript/TypeScript)
Experience with working on ReactJS and Redux
Familiarity with front-end build tools (e.g., Webpack, npm, yarn)
Experience with version control systems (e.g., Git)
Understanding of software development best practices, including agile methodologies, continuous integration, and continuous delivery (CI/CD)
Excellent problem-solving skills and attention to detail
Strong communication and interpersonal skills, with the ability to work effectively in a team environment
Extensive Experience: Significant professional experience in designing, developing, and deploying enterprise-scale applications
Leadership & Mentorship: Proven experience in a technical leadership role, including mentoring developers, conducting code reviews, and guiding team decisions
Architectural Expertise: Demonstrated ability to design and implement complex, distributed systems and microservices architectures
Expert-level proficiency in Java and the Spring ecosystem (Spring Boot, Spring Cloud, Spring Security, Spring Data, reactive spring)
Deep experience in designing, building, and consuming RESTful APIs and microservices
Extensive experience with relational databases (e.g., PostgreSQL, Oracle) and NoSQL databases (e.g., MongoDB)
Strong understanding of ORM frameworks (e.g., JPA/Hibernate) and data modeling
Proficiency with build tools like Maven or Gradle and CI/CD pipelines
Strong proficiency in modern front-end technologies (e.g., HTML5, CSS3, JavaScript/TypeScript)
Hands-on experience with modern JavaScript frameworks, particularly ReactJS and state management libraries like Redux
In-depth knowledge of version control with Git and collaborative development workflows
Excellent problem-solving, analytical, and strategic thinking skills
Superior communication and interpersonal skills, with the ability to articulate complex technical concepts to both technical and non-technical audiences

Nice to have:

Experience with GraphQL API design and development
Familiarity with Spring Cloud for building distributed systems
Knowledge of containerization technologies like Docker and orchestration tools like Kubernetes
Experience with cloud platforms (e.g., AWS, Azure, GCP)
Experience with GraphQL API design and implementation
Experience with containerization (Docker) and orchestration (Kubernetes, OpenShift)
Experience with public cloud platforms (AWS, GCP, Azure)
Knowledge of the financial services industry and experience building applications in a regulated environment

Additional Information:

Job Posted:
February 14, 2026

Employment Type:

Fulltime

Work Type:

Hybrid work

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