Leroy Dang - Backend Developer

I'm a seasoned Backend Developer with over 6 years of experience specializing in Java and the Spring framework. My expertise extends to other programming languages such as JavaScript and Python, allowing me to adapt to diverse project requirements. I'm skilled in building robust and scalable backend solutions that meet the needs of modern applications.

Project list

COX Automotive

COX automotive has some sites for trade-in vehicles. They want to improve personal experiments on their sites. Our mission is to migrate to AWS cloud, improve the performance of the sites and develop the new feature to make the site friendly and easy to use.

- Migrate the old system to AWS cloud + micro services, propose solution to resolve the problem, support fixing production issue, support other team member if possible - Create/mange infrastructure by Terraform/AWS CDK; implement the branching strategies - Add some alarms on the cloud watch to monitor system based on the log (the notification will be send to the slack channel) - Add the pipeline for the new repo to support CI/CD; migrate the pipeline from Jenkins/CodeBuild to GithubActions; enhance Jenkins perf - Trace/investigate the issue on Splunk + New Relic when get the notification on Slack channel (perf issue, REST API issue) - Implement some deployment strategies: blue/green deployment (for EB), rolling out, canary (for lambda serverless) - Implement some strategies for disaster recovery, failover, auto scaling, high availability,

Technologies: AWS, Python, Node.js, Java, Spring Boot, React, Cypress, Jest, Docker, Terraform, GitHub Actions, Jenkins

NB Tracking

This is the gateway to import policy into Sunlife insurance core system. There are three parts of this project: NB Tool, NB Tracking UI and Event Service.

- Implement all of requirements from user into application (add new fields into screen, develop new function or schedule, design and implement new screens, develop a new service, ...) - Support fixing production issue, support other team member if possible - Monitor system based on the log - Add/update the pipeline to support CI/CD on Jenkins - Collaborate with other teams to improve/enhance the CI/CD pipeline

Technologies: Java, Spring Boot, Angular, Jenkins, JUnit, Kubernetes

Sacombank

Integrate new partners into the bill system at Sacombank. This project using Struts 1, Spring Boot, Maven, JDBC and Hibernate. Beside that, I also build a tool to auto pay bill in case some partner request pay lot of bill in one time (it was called "Bulk bill payment"). Its tool using Jquery, Apache felix, Apache Ant and JDBC.

- Develop to using this partner's webservice to get customer info, fetch bill and pay bill. After that, using this function to integrate into Sacombank bill system. I also work with the team to optimize app performance to serve up to thousands of concurrent users.

Technologies: Spring Boot, MySQL

Dynamic Form/Dynamic Report

First project is dynamic form. You can add control (just like textbox, combo box, date box, radio button, ...), edit control's properties (just like width, height, label, data, events,...) and delete control. All your action will do on client site, don't need to code at all. Second project is dynamic report. At this project, you'll config your report on 1 site and after that, your report that is configured will show on another site.

- Develop some control (textbox, combo box, captcha,..) and save its properties, form architecture into database.

Technologies: jQuery, Spring Boot, MySQL

Project list

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