Trait is a startup company which dedicates in verifying the world and maximizing trust. Trait enables people, businesses, and organizations to share, connect, and transact where they otherwise wouldn’t. My role in the company is helping features design and implementation. My daily work includes, but not limited to, - Communicating with our partners and stakeholders around the world to convert abastract ideas into concrete feature requirements. - Driving the software architecure design and cooperating with teammates for feature implementation and delivery. - Driving the overall developing ecosystem, like increasing test coverage, improving system performance, etc.

- Lead the design and implementation of mobile SDK functionality. - Drive the discussion of feature design crossing cloud and device teams. - Drive the automation workflow to enhance system quality, which includes: 1. Improving unit/integration test coverage(> 80%). 2. Converting issues reported from customers to test cases. 3. Deploy instrumentation and end-to-end tests to automation workflow. 4. Enlarge the test scope to cover the correctness of partner teams. 5. Enlarge the test functionality to improve runtime performance.

An Android UI framework engineer - Dedicate to an open source project - "Litho: A declarative UI framework for Android" (https://fblitho.com/) - Design and implement modern Kotlin Litho APIs - Design and implement Android UI benchmark framework. It's designed to run perf tests continuously and bisect to locate root cause when regressions happen.

- Bookmark management features implementation - Visual refresh implementation (Photon project: https://phoneia.com/en/this-is-the-new-interface-photon-of-firefox-that-you-can-try-on-your-android/)

- Design and implement several Android apps, includes Chat, DS note, DS finder, DS cam, and DS download. - Introduce clean code architecture to the team. - Import dependency injection and reactive programming design paradigm to the team. - Design and implement a crossing app library to improve data routing in Synology QuickConnect service. - Design and implement Auto Testing on several apps.

- Driver porting (Wireless, DSL driver) - Feature Customization: WEB GUI, console command, DHCP option, etc. - TR-069, TR-098 specification implementation - Design and implement stack backtrace tool - Implement backtrace() for MIPS 32-bit CPU - Hook SIGSEGV or SIGABORT signal when process starts, dump backtrace and converts memory address to function name when SIGSEGV/SIGABORT is triggered. - Easier to find root cause by tracing code flow when process crashes