Duncan Levings Email & Phone Number

Toronto, Ontario, Canada

Toronto, Ontario, Canada

• Spearheaded significant refactors of the event sourcing solution and validation services to enhance maintainability and performance, resulting in improved load testing and scalability.
• Implemented a new business feature, “warnings,” in the validation service through effective communication and frequent testing.
• Developed a robust validation framework to support flexible and scalable processes, integrating asynchronous execution for better performance.
• Designed the business configuration service to provide easy access for employees to manage business values, ensuring flexibility for future business features.
• Collaborated with a cross-functional team to deliver major features, providing comprehensive testing and documentation for future adaptability.
• Led the team during a critical project phase, ensuring clear communication, thorough testing, and detailed documentation for transparency and process understanding.

Toronto, Ontario, Canada

• Contributed to the design and enhancement of an event sourcing solution, pivotal for microservices integration and data integrity within OMERs.
• Orchestrated a major upgrade of the technology stack, transitioning from Java 11 to Java 17 and Spring Boot 1.x to Spring Boot 2.6.x, enhancing system performance and security.
• Developed automated process solutions utilizing the event sourcing service, optimizing operational efficiencies and system reliability for core business functions.
• Authored comprehensive technical documentation, including an in-depth guide on Spring Boot testing best practices, ensuring high-quality standards.
• Conducted knowledge transfer sessions, sharing insights and best practices, fostering a culture of continuous learning and improvement within the team.

Toronto, Ontario, Canada

• Collaborated with the framework team on backend tasks, focusing on designing and implementing an new event sourcing solution.
• Utilized a suite of development tools including GitLab, Jira, IntelliJ, PgAdmin, Postman, Docker, and Kubernetes for project management and application development.
• Implemented RESTful endpoints using Java and Spring, enabling data retrieval from JpaRepositories and introducing a filtering endpoint leveraging Specifications and Pageable parameters.
• Developed comprehensive unit tests using Mockito for various services, covering both successful and failure scenarios for endpoints.
• Facilitated the migration of the existing database from Google Cloud Firebase to a PostgreSQL database, involving the creation of SQL queries for nested JSONB columns and defining Entities for Spring Hibernate.
• Implemented cron jobs using Spring EventScheduler for retrying system processes based on database-defined properties, enhancing system reliability.

Toronto

• Worked with React to design, develop, test and deploy new features to Royaltymine.com.
• Utilized MongoDB along with conventional standards in react services to develop new backend features.
• Integrated Aggregate functionality into the backend to significantly improve performance.
• Created new front-end pages using Ant design along with Bootstrap.
• Researched, designed and implemented JWT Token authentication for login and user access permissions.
• Using Socket.IO created connection streams for real-time notifications.

Oakville

• Worked with AngularJS to develop, maintain and produce front-end applications.
• Designed and implemented services, libraries and various components utilizing Angular Clarity and Angular Material framework.
• Created Karma test cases, Keycloak library, Storybook UI components and Docker files.
• Utilized tools such as: Jira, Gitlab and npm.
• Collaborated with Rangle.IO developers in designing and implementing a Genworth application.
• Worked with back-end team to develop new back-end service points using Java and bootstrap.

Oakville, Ontario

• Worked in the underwriting department assisting with general data entry and collation tasks.
• Improved processes, reduced storage use and increased productivity through the creation of Excel scripts.

Oakville, Ontario

• Worked in the underwriting department assisting with general data entry and collation tasks.

Bachelor'S Degree, Computer Science

Certificate, Honours Advanced Programming: Game Development

• Focused on C++, Unity, OpenGL and creation of tools for development during the first half of the program. Created a functional C++.

Ontario College Diploma, Computer Programming

• Improved upon and honed programming skills, through the use of Java, Javascript, HTML5, and C#. • Developed a sound understanding of.

High School

Took programming classes in grade 11 and 12 where i started learning the basics of programming, Java and HTML.