Jia Jun Koh

This sheet is an easy-to-use service that utilizes a spreadsheet as a database to help automate tedious processes, including updating the configuration of RabbitMQ, creating cards for Trello boards, and as a stock management system.

This complete end-to-end parking solution from a gate control to the cashier was developed using Arduino, Raspberry Pi, Vue.js, and Node.js. In collaboration with two other colleagues, I created the whole solution in three months and shipped it to multiple paid car park shopping malls and condominiums.

Instastalk is a Python library that scrapes through Instagram to download stories and posts locally through API requests without using any WebDrivers. It supports login for private users with a caching and time-out mechanism to avoid hitting the rate limit imposed by Instagram.

A travel blog platform that primarily targets text-based content. It leverages cloud storage and its CDN service to reduce costs and latency. It uses a modern WYSIWYG editor (Tiptap) to provide a friendly UI and UX. Its SEO-centric nature also enables some of its content to rank top 10 on Google consistently.

Wonderplan is an AI itinerary planning platform that enables users to generate itineraries in only a matter of a few clicks.

I worked as a back-end developer on the project, developing performant APIs using gRPC and REST. The application is Bootstrapped using Kratos and built in a stateless manner and adhering to standard domain-driven design (DDD) practice. Certain states passed through GCS. A customized temporal version was adopted to manage reliable and robust workflows to generate itineraries through an OpenAI API. In-house proxy and round-robin strategies are developed to overcome rate limits imposed by OpenAI.