William (Won) S. Choi
PROFESSIONAL EXPERIENCE
Freelance iOS developer
- Fanny Pack - social trip-sharing app with Firebase and Facebook integration
- Client confidential - developed simple social chat app
- Photo Collection, Castle Keep, Penguin Rush on App Store and Google Play Store
- In development - Money management app
- Technologies used: Firebase, MapKit, CoreLocation, REST, Git, CoreData, Realm
Senior Software Engineer - Carrier Corporation Aug/2016-Present
- Developed next gen calculation and selection engine in C#
- Product owner for calculation bridge for next gen and legacy interface
- Maintained and updated legacy software in VB and MS Access DB
- Updated outdated methods of programming practices
- Implemented modern version control and Agile methodologies
- Performed QA and regression testing
TAS Energy - Application Developer/Engineer Sep/2010 - Jan/2013
- Main Process Technology Engineer for Turbine Inlet Chilling business segment
- Created PFD and P&ID for chiller plants as well as interface with customer equipment
- Programmed, simulated and verified custom-built chiller packages with equipment from Trane, York and Carrier
and their effect on combined and simple cycle plant performance
- Programmed, simulated and verified design and off-design models for inlet chilling air coils, inlet filters, closed- and open-loop cooling towers, thermal storage tanks and chillers
- Developed and deployed software tools for sales and application engineers
- Reverse engineered and improved primary industrial sales tool written in C# and VB
- Generated mathematical models for estimating performance of new gas turbine models using curve fit
- Automated industrial, commercial and mission critical business segment proposal generation in Word VBA
FMC Technologies - Pipes and Fittings and Valve Product Engineer Jan/2013 - Apr/2016
- Assigned to Malaysia and Singapore to prevent multimillion dollar liquidated damage for overdue projects
- Resolved conflicting inspection results by correcting faults in vendor CNC programming
- Supervised junior engineers in India and other global offices on designing valve assemblies
EDUCATION
The University of Texas at Austin - Bachelor of Science in Mechanical Engineering May/2010
SKILLS
Objective-C, Swift, Xcode and Interface Builder, sqlite, C, Java, C#, VBA, Javascript, Ruby, HTML/CSS
Languages: fluent in Korean, intermediate in German, basic in Chinese