Location: Mississauga, ON (Hybrid)

Salary: CAD $120,000–$130,000 per year

Experience: 9–12 years

About the Role

We are looking for an experienced Java Developer to design, develop, and maintain scalable, high-performance microservices and REST APIs. The ideal candidate will have robust hands-on experience with Java, Spring Boot, MongoDB, and microservices architecture, along with exposure to Kafka and cloud or container platforms such as AWS and OpenShift.

Key Responsibilities
Design, develop, and maintain Java-based microservices.
Build RESTful APIs following enterprise design standards.
Develop and optimize SQL queries for transactional and reporting requirements.
Design and manage MongoDB schemas, indexes, queries, and aggregation pipelines.
Ensure high availability, scalability, reliability, and performance of applications.
Implement exception handling, logging, monitoring, and resiliency patterns.
Develop and maintain integrations with upstream and downstream systems.
Collaborate with Business Analysts, Architects, QA, and DevOps teams.




Participate in code reviews, unit testing, debugging, and defect resolution.
Support CI/CD pipelines, deployments, and production troubleshooting.
Follow secure coding practices and enterprise compliance standards

Required Technical Skills
Java: Solid hands-on experience with Java 8, 11, or 17.
Spring Framework: Spring Boot, Spring MVC, and Spring Data.
Microservices: Service decomposition, API contracts, and distributed application design.
API Development: REST APIs, JSON, OpenAPI, and Swagger.
MongoDB: Document modeling, indexing strategies, aggregation framework, CRUD operations, and performance tuning.
SQL: Query development and optimization for transactional and reporting use cases.
Messaging: Kafka producers, consumers, and partitioning concepts.
Cloud and Containers: Experience with AWS and/or OpenShift.
Integration: REST-based integrations with upstream and downstream systems.

📌 Java Developer Mississauga (Canada)
🏢 Staffmax Staffing & Recruiting
📍 Canada