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Senior Java Developer

3 weeks ago

Vancouver, British Columbia, Canada Celestial Systems Inc. Full time

About Us:

Celestial Systems is a leading technology services company specializing in data-driven solutions for enterprise clients. We work with top financial institutions, helping them modernize their technology stack and optimize their analytics capabilities.

Location: Vancouver, British Columbia, Canada

Job Summary

We are seeking a highly skilled Senior Java Developer with 15+ years of experience, possessing in-depth knowledge of both legacy and modern Java technologies. The ideal candidate will have a strong command of Java-based application development—ranging from classic desktop and web frameworks like Swing and Servlets to modern enterprise components, APIs, and database design. You will collaborate with cross-functional teams to design, develop, and maintain robust, scalable, and efficient software solutions.

Key Responsibilities

  • Design, develop, test, and maintain Java applications using both legacy (Swing, Servlets, JSP) and modern Java frameworks.
  • Modernize and refactor existing applications to improve performance, scalability, and maintainability.
  • Collaborate with business analysts and team members to translate business requirements into technical solutions.
  • Develop APIs, integrate third-party services, and ensure secure data exchange between systems.
  • Work closely with database administrators to design and optimize database schemas, queries, and stored procedures.
  • Conduct code reviews, performance tuning, and debugging of complex systems.
  • Stay current with emerging Java technologies, tools, and best practices to recommend and implement continuous improvements.

Required Skills and Qualifications

  • Bachelor's degree in Computer Science, Engineering, or a related field.
  • 15+ years of hands-on Java development experience.
  • Strong understanding of Java SE and EE, including Swing, Servlets, JSP, JDBC, and multithreading.
  • Experience with newer frameworks like Spring, Spring Boot, and RESTful API development.
  • Proficiency in relational databases (MySQL, PostgreSQL, or Oracle) including SQL optimization and stored procedures.
  • Familiarity with build tools (Maven, Gradle) and version control (Git).
  • Solid grasp of object-oriented design principles, design patterns, and software development best practices.
  • Knowledge of front-end integration using HTML, CSS, and JavaScript is a plus.
  • Excellent problem-solving, debugging, and analytical skills.

Preferred Qualifications

  • Experience migrating legacy systems to modern Java platforms.
  • Familiarity with containerization (Docker) and CI/CD pipelines.
  • Exposure to microservices architecture and cloud platforms (AWS, Azure, or GCP).

What We Offer

  • Competitive compensation and benefits package.
  • Opportunities to work on both legacy modernization and cutting-edge projects.
  • Collaborative and growth-oriented work environment.