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Java Developer

2 weeks ago

Toronto, Ontario, Canada BuzzClan Full time $80,000 - $120,000 per year

Assignment Deliverables

  • Detailed design and specification documents for RESTful APIs, including endpoints, request/response models, authentication, and error handling.
  • Clean, scalable, and secure REST APIs built using Java and Spring Boot, adhering to best practices and company standards.
  • Modular and decoupled microservices, designed and deployed independently, with clear inter-service communication protocols.
  • Using APIs to develop applications based on the business requirement to transform and route data.
  • Comprehensive test coverage using tools like JUnit, Mockito, or Test Containers to ensure code reliability and prevent regressions.
  • Efficient relational database schemas designed and implemented to support API data storage and retrieval.
  • Profiled and optimized APIs for response time, memory usage, and throughput, ensuring high performance under load.
  • Secure API calls with proper authentication (e.g., OAuth2, JWT), authorization, input validation, and protection against common vulnerabilities (OWASP).
  • Dockized applications with configuration files, docker-compose scripts, and Kubernetes manifests (if applicable) for smooth deployment.
  • Integrated monitoring (e.g., Prometheus, Grafana) and logging (e.g., ELK stack, Logstash, or Splunk) for operational visibility.
  • Produce clear documentation for developed systems such as design, deployment instructions, and operational guides.
  • Regular code reviews, feedback sessions, and mentorship to junior developers, ensuring code quality and knowledge sharing.
  • Weekly or sprint-based status updates on development progress, blockers, and delivered functionalities.
  • Timely resolution of production issues, regression fixes, and performance improvements based on user feedback and testing.
  • Available for any on-call on weekends for production issues.

Experience and Skillset Requirement

Mandatory Requirements

  • Extensive experience in designing, building, and consuming REST APIs, including experience with API documentation and testing.
  • In-depth knowledge of integration patterns and best practices, including experience designing and building integration solutions using Spring Integration
  • In-depth knowledge of microservice architecture and experience building scalable, highly available systems using various Azure Services.
  • Hands-On experience in messaging queuing and event driven architecture.
  • Experience with asynchronous communication, multi-threading.
  • Strong skills in SQL and experience working with relational databases, such as SQL Server, or Oracle.
  • Knowledge on Integration with Oauth2, JWT, SAML, etc.
  • Knowledge of data transformation techniques, such as mapping and normalization, and experience using them in a Spring Integration context.
  • Experience with asynchronous communication, multi-threading.
  • Ability to transform data between different formats (JSON, XML, CSV).

Desired Skills and Experience

  • Strong proficiency in object-oriented programming and functional programming with modern Java features.
  • Strong expertise in Java and the Java development ecosystem, including experience with Spring Boot.
  • In-depth knowledge of microservice architecture and experience building scalable, highly available systems.
  • Expertise in designing, building, and consuming REST APIs; knowledge of HTTP methods, status codes, and REST best practices
  • In-depth knowledge of integration patterns and best practices, including experience designing and building integration solutions using Spring Integration
  • Experience with enterprise integration technologies, such as JMS, AMQP, or REST, and an understanding of how to use them in a Spring Integration context.
  • Strong knowledge of XML and experience working with XML-based integration solutions, such as XSLT and XPath.
  • Knowledge of data transformation techniques, such as mapping and normalization, and experience using them in a Spring Integration context.
  • Experience with message-oriented middleware and enterprise service buses, such as Azure Service Bus
  • Experience on Event Driven architecture, experience on Azure Event Hub, etc.
  • Strong skills in SQL and experience working with relational databases, such as SQL Server, or Oracle.
  • Understanding of security best practices and experience implementing authentication, authorization, and encryption.
  • Strong experience with writing automated tests, including unit, API test, and a deep understanding of the testing process.
  • Familiarity with Kubernetes, Helm, or other container orchestration tools.
  • Familiarity with Agile software development methodologies, such as Scrum or Kanban, and experience participating in sprint planning and retrospectives.
  • Excellent communication skills, both written and verbal, and the ability to work effectively with both technical and non-technical stakeholders.
  • A passion for staying up-to-date with the latest industry trends and technologies, and a desire to continuously learn and improve your skills.
  • Strong problem-solving and debugging skills, and experience diagnosing and resolving complex issues.
  • A track record of delivering high-quality, robust, and scalable solutions in a fast-paced, deadline-driven environment.
  • Strong analytical and troubleshooting abilities for complex systems.
  • Clear verbal and written communication for technical and non-technical stakeholders..
  • Capable of mentoring junior developers and contributing to architectural decisions.
  • Ability to prioritize tasks, manage deadlines, and handle multiple responsibilities.

Resumes Evaluation/Criteria:

Criteria 1: Technical Design - 30 Points

  • Strong expertise in Java and the Java development ecosystem, including experience with Spring Boot.
  • In-depth knowledge of microservice, Event Driven architecture and experience building scalable, highly available systems.
  • Extensive experience with REST API design and development, including experience with API documentation and testing.
  • Practical knowledge in applying various design patterns and standards to the technical design and development.
  • Strong skills in SQL and experience working with relational databases, such as SQL Server.

Criteria 2: Integration - 30 Points

  • In-depth knowledge of integration patterns and best practices, including experience designing and building integration solutions using Spring Integration
  • Hands-On experience in messaging queuing (Azure Service Bus) and event driven architecture.

Criteria 3: Technical Framework and Middleware - 25 Points

  • In-depth knowledge of microservice architecture and experience building scalable, highly available systems using various Azure Services.
  • Must have prior experience in working with containerized environments such as Azure, OpenShift, Docker, Kubernetes, Microservices, etc.
  • Experience with message-oriented middleware and enterprise service buses, such as Azure Service Bus.
  • Experience on Event Driven architecture.

Criteria 4: Security - 10 Points

  • Experience with Security and Web Services Security standards and frameworks. Must have extensive working experience in OAuth, OpenID, SAML 2.0, etc.
  • Understanding of security best practices and experience implementing authentication, authorization, and encryption.

Must haves:

  • Extensive experience in designing, building, and consuming REST APIs, including experience with API documentation and testing.
  • In-depth knowledge of integration patterns and best practices, including experience designing and building integration solutions using Spring Integration
  • In-depth knowledge of microservice architecture and experience building scalable, highly available systems using various Azure Services.
  • Hands-On experience in messaging queuing and event driven architecture.
  • Experience with asynchronous communication, multi-threading.
  • Knowledge on Integration with Oauth2, JWT, SAML, etc.
  • Strong skills in SQL and experience working with relational databases, such as SQL Server, or Oracle.
  • Knowledge of data transformation techniques, such as mapping and normalization, and experience using them in a Spring Integration context.