• Develop and maintain high traffic services to build surveys and send email notifications.

• Develop web apps to monitor notification usages and manage the survey question bank.

• Use Python, Kafka, React, Redux, Next.js, GraphQL, Kubernetes, MySQL/MSSQL, etc.

• Design and implement the new registration platform from scratch with React/Redux, Typescript, Formik, Node.js, Python Flask, GraphQL, PostgreSQL, Redis.

• Lead building a few cloud Microservices using Python Flask.

• Lead authentication project with integrating Auth0 service.

• Work with the DevOps team to deploy applications on google kubernetes.

• Integrate third-part services to track customer data and monitor app performance.

• Provide technical guidance, review code and organize/represent learning session.

• Design and implement a CRM system for Caterpillar Dealers around the world, allowing

them to manage clients accounts, edit activities, leads and opportunities.

• Design and implement a service workflow system to manager the whole work order cycle,

like assigning jobs, ordering parts, entering time sheets and generating reports.

• Technologies used: React, Node.js, .NET(C#), GraphQL, PostgreSQL, MongoDB.

• Lead some modules development from requirement analysis, application design, code implementation, QA test and deployment.

• Work as a key developer in the development of online sales and service platforms and mobile apps for CAT dealers.

• Design and implement web APIs and integrate external web services to achieve data synchronization.

• Work as a key developer in the development of appBuilder system that allows customers to turn desktop websites as mobile apps simply.

• Lead some function modules development like authentication, social network integration, navigation integration, forms generating and online shopping.

• Technologies used: Sencha Touch JS framework, PHP, MySQL, HTML5, CSS3, Sass.