Sr. Java Developer

Infoya•Toronto, ON

3d•Hybrid

About The Position

We are looking for an experienced Java Developer to design, build, and maintain robust, scalable, and high-performance applications. This role focuses on developing modern e-commerce and enterprise-grade solutions for retail and inter-organization clients. The ideal candidate will have strong expertise in Java, Spring Boot, microservices architecture, RESTful API development, SQL databases, cloud environments, and distributed systems. You will collaborate closely with cross-functional Agile teams to deliver secure, reliable, and performance-optimized applications.

Requirements

Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience.
6+ years of hands-on experience developing RESTful APIs and microservices using Java/J2EE.
Strong experience with the Spring ecosystem, including Spring Boot, Spring MVC, Spring Cloud, Spring Security, and Spring Batch.
Expertise in Core Java, preferably Java 11 and Java 17.
Strong knowledge of multithreading, caching, synchronization, concurrency, and design patterns.
Experience in microservices/API development and migration from monolithic systems.
Hands-on experience with CI/CD pipelines and tools such as Jenkins, Docker, Kubernetes, Maven, and Gradle.
Proficiency with SQL and NoSQL databases such as PostgreSQL, MySQL, and Redis.
Solid knowledge of authentication and authorization mechanisms such as OAuth2 and JWT.
Experience with cloud platforms, especially Google Cloud Platform (GCP).
Understanding of distributed systems and API gateways such as Spring Cloud Gateway, Kong, or similar tools.
Experience with web application security, vulnerability handling, and production issue management.
Strong debugging, performance optimization, and problem-solving skills.
Experience using development tools such as IntelliJ, PgAdmin, Postman, and Git.
Strong communication and collaboration skills.

Nice To Haves

Experience with hybrid application development.
Knowledge of Google Cloud Storage (GCS).
Familiarity with Agile methodologies and collaborative development environments.

Responsibilities

Design, develop, and maintain microservices-based applications using Java and Spring Boot.
Develop and optimize RESTful APIs to ensure high performance, scalability, and security.
Write clean, efficient, and maintainable code following best practices and design patterns.
Work with SQL databases such as MySQL and PostgreSQL, and caching technologies such as Redis.
Optimize database queries and application performance for scalable enterprise systems.
Deploy, manage, and monitor applications in cloud environments, preferably Google Cloud Platform (GCP).
Manage the end-to-end release process, including build preparation, automated testing, UAT, stakeholder approvals, Jenkins deployment, and post-deployment validation.
Conduct unit and integration testing using JUnit and Mockito to ensure application reliability.
Design, develop, and optimize multithreaded applications for performance and scalability.
Implement and manage caching strategies using Redis, or similar tools to reduce latency and improve throughput.
Work on synchronization, concurrency, and performance tuning challenges in distributed systems.
Collaborate with UI/UX, DevOps, QA, Product, and other cross-functional teams to define and deliver new features.
Participate in code reviews, mentoring, and knowledge-sharing sessions.
Troubleshoot production issues, debug complex problems, and support vulnerability handling and application security improvements.