● Implement backend service using Spring Boot with RxJava2 ● Use RxJava for non-blocking streams, it provides asynchronous processing for such as REST API, GraphQL resolver, or database' CRUD ● Improve performance of the post matching by tuning both index template and search template within Elasticsearch Technologies: Java, Kotlin, RxJava, Spring Boot, Kafka, Redis, MongoDB, GraphQL, Elasticsearch

At OpenISDM Lab ● Worked as a software engineer, participated in developing an open-source system for the indoor positioning system ● Designed the indoor navigation mobile application architecture and modules for Taipei City Hall and National Taiwan University Hospital, benefiting 1M+ visitors each year ● Developed the Bluetooth indoor navigation app using the Xamarin.Forms (C#), it uses the MVVM design pattern and includes asynchronous tasks, events, etc ● Implemented event-based communication between the modules (e.g. Navigation Module, Positioning Module, etc) ● Led two members in developing the mobile application project Technologies: C#, .NET Event-based Pattern, Xamarin.Forms, Bluetooth Low Energy Beacon

At OpenISDM Lab ● Maintained and developed both iOS (Objective-C) and Android (Java) applications Technologies: Objective-C, Java, Bluetooth Low Energy Beacon