Job duties==========- Designed, developed and implemented iOS apps using Swift, and SwiftUI.- Designed, developed, and implemented RESTful APIs using Spring Boot and Spring MVC.- Optimized app performance and ensured a smooth user experience.- Collaborated with designers and product managers to translate requirements into functional app features.- Wrote clean, maintainable, and reusable code.Experience========- iOS app development, and deployment. (Obj-C, Swift, SwiftUI) - Java server maintain, including db schema, RESTful API for mobile apps, and APNS client for iOS notifications.- Python / shell scripts, Jenkins for automation and DevOps tasks.- Amazon Alexa for IoT device, OAuth 2.0 server.- Vue3, React front-end, Javascript, and TypeScript. backed with jsp (Java servlet)

Job Duties========* My first job, maintain products with Win32 API, MFC in the begining.* Learn and write iOS app, for iPhone3GS, iPhone4. * Team leader for a new product, which is a web service project, with `asp.net` techs. I am in charge of this project for last 2 years in this company. > * Help the team more efficient. So I build Git, wiki servers. Git is good to merge projects.> * Daily standup meeting for my team.> * In charge of the database schema, and database related tasks.Experience========Windows Platform------------------------* MFC, Win32 API* TWAIN application driver* C#* asp.net MVC v3 / v4 /v5* asp.net WebAPI v1 / v2* asp.net Web Service (SOAP web service)* EntityFramework v4 / v5 / v6* LUCENE.NET libraryiOS / Mac-------------* flow view conponent (by OpenGL 1.1)* GridView component.* Customized contact editing view.* Parsing XML.* SOAP client & server.* SQLite, FMDB, CoreData* Mac, customized PTP (Picture Transfer Protocol) library.Others---------* Html, CSS, jQuery, javascript, (under asp.net MVC framework)* Git client, and server.* Setup redmine, integrated with gitolite.* IIS, MSSQL.