Back-end Engineer  •  Anytime Ltd.                                                                                                                   Apr 2021 - Present

Alllink Project  Alllink | 網紅必備多連結頁面
One-stop website which integrates links, similar to linktree.

• Use AdonisJS and PostgreSQL to build the function of linking social media and webpages. 
  Build from concept to completion independently within 3 months.
• Use GitHub Actions for CI/CD to automate building, testing, and deploying the website. 
• Use Docker Compose to create a standardized development environment.
• Integrate NewbePay,  a secure online payment gateway to the website.
• Design a tree-structure table for diverse service components which enhances system flexibility and scalability.
• Design referral trees and tree-structure algorithm to highly improve recursive queries.
• Integrate Redis-based queue and AWS SES to handle email jobs and background jobs.

Firstage Project  Firstage｜線上學習｜諮詢平台
An online teaching platform which supports 1-on-1 and groups bookings across different timezones.

• Launch a highly flexible booking system by using AdonisJS and PostgreSQL within 6 months.
• Integrate Stripe payment system to provide a seamless and secure purchasing user experience.
• Use Redis to reduce 50% user queries time for available appointments.
• Write test cases with Japa test framework  for ensuring appointments are handled correctly.

Anytime Project  Anytime App - 輕鬆管理您的預約
Appointment Management Tool Designed Specifically for Manicurists/Lash Designers/Hairstylists

• Develop and maintain the multi-zone appointment management tool by using Laravel framework.
• Solve race conditions which are caused by up to 200 end-users while sellers open for a new appointment at the first minute.
• Reduce CPU load during peak hours from 80% to 25% by improving SQL slow queries.
• Reduce the deployment time from 30 to 10 minutes by implementing GitHub Actions for CI/CD effectively.
• Collaborate with a product manager to enhance user engagement through improving UI/UX and adding new features such as integrating SMS and LINE Message API.
• Develop the Flutter app product using the GetX state management framework and following the coding style of the senior engineer.

Software Engineer  •  Mercue Information Co., Ltd.                                                                                      Nov 2018 - Mar 2021

• Develop a Mercuries Life Insurance product and recruitment system using Spring MVC, Hibernate and SQL Server.
  
• Migrating ASP.NET Web Forms to ASP.NET MVC framework with a senior back-end engineer.
• Independently develop an iOS IoT App from concept to completion.
• Integrate Tuya IoT SDK and Siri  for seamless control of IoT devices.
• Implement multi-threaded processing to optimize the app's performance and enhance user experience.
• Implement web pages of Taiwan Cooperative Bank insurance products using jQuery, Bootstrap and Ajax.