Ruofei Du Email & Phone Number

Medina, WA, US

Toronto, Ontario, Canada

• Worked in a team of 6 developers during the development of 2 Integrations (TypeScript Library) that connect clients' web applications to service providers' SDKs. Provided the clients with phone-call and live chat.
• Utilized multiple Design Patterns during the development that increased the reliability and maintainability. The Design Patterns include but are not limited to: Singleton, Factory, Adaptor, and Dependency Injection.
• Tested the Integrations with Jest, Angular Testing, and Cypress.
• Supervised and Provided training to 2 junior developers on feature development and code standard.

1101 Nicholson Road, Newmarket, ON, Canada

• Established a team with 6 developers on developing Lanaware, which is a cloud-based solution that helps manufacturing companies monitor networks.
• Managed multiple software testing, versioning, releases, and customer demos to meet strict deadlines and bug fixes for Lanaware.
• Solved multiple infrastructural problems such as: - Making NodeJS server connecting to both local and remote databases at the same time - Allowing Web Application to run under either Development Mode or Production Mode.
• Provided technical support to customers on network scans.

North York, Canada

• Developed multiple large-scaled Angular web applications used by steel production companies to monitor and manage production processes.
• Applied different techniques to optimize web applications such as Property Binding, Event Binding, Two-way Binding, Services, JWT, JSON, RESTful API, Pipes, Subscription, and SignalR.
• Added various features using open-source libraries such as Highcharts, Angular-Gantt, jsPDF, and Html2Canvas, etc.
• Connected Front-end App and Databases with C#.NET Controllers, Implemented controller logic that handles RESTful requests.
• Wrote and modified MySQL and Oracle stored procedures that create, read, update and delete database records.

Winnipeg, Manitoba, Canada

• Designed Business Rule Engine for a running mobile application (RaceRunner) offering users the ability to compete against global players.
• Converted hard-coded running events to one event program that executes different rule files to improve maintainability and extendability of the app.
• Implemented the Rule Engine Library with C++. This object-oriented project encapsulates functions into modules, including Rule File, Parser,
• Rule Engine, Race Engine, and Result Message.
• Improved performance by reducing string comparisons. Added features to support multiple rules, French content (previously English only).
• Problem-solved a complex programming issue using polymorphism.