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Senior Full Stack Java Developer

Job in Mississauga, Ontario, Canada
Listing for: Citi
Full Time position
Listed on 2026-02-17
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer, Java Developer, Cloud Engineer - Software
Job Description & How to Apply Below

Responsibilities

  • 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.
  • Required Qualifications

  • Back-End Expertise: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 (, Postgre

    SQL, MySQL) and No

    SQL databases (, Mongo

    DB).Solid understanding of data access layers and ORM frameworks like Spring Data JPA/Hibernate
    .Experience with build tools like Maven or Gradle.
  • Front-End Expertise:Proficiency in modern front-end technologies (, HTML5, CSS3, JavaScript/TypeScript).

    Experience with working on React

    JS and Redux.

    Familiarity with front-end build tools (, Webpack, npm, yarn).
  • General

    Qualifications:

    Experience with version control systems (, Git).Understanding of software development best practices, including agile methodologies, continuous integration, and continuous delivery (CI/CD).Excellent problem-solving skills and attention to communication and interpersonal skills, with the ability to work effectively in a team environment.
  • 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 (, AWS, Azure, GCP).
  • Full Stack Development Lead - Vice President (C13)

    Role Summary

    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.

    Responsibilities

  • 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.
  • Required Qualifications

  • 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.
  • Back-End Expertise: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…
  • Position Requirements
    10+ Years work experience
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