Oct 2017 – Dec 2019 · 2 yrs 2 mos · New York, United States

• Project: Rewrite Oracle form financial applications (NDA) to be .Net (Core)/Angular website on Azure from scratch. Projects were deployed successfully in production in 2+ year of design/develop.
• Roles:
• Hands on key coder/architecture
• Handling requirement analysis from Boeing stakeholder.
• Meeting/demo the progress
• Architecture support to 3 other financial projects (that run in parallel from other development teams)
• Technologies:
• Angular 9 with Bootstrap, Kamar, Jasmine
• C# .Net Core
• Rest API, GraphQL
• Dev Express, JQuery, HTML5
• MSSQL, Oracle, MongoDB, MSSQL, Redis
• NodeJS
• Cloud: Azure with IoT Hub, Service Bus, Data Stream Analytic, Data Lake, Blob Storage, etc
• Elastic Search (1.7, 6.x)
• Docker
• TDD, CI/CD

Mar 2014 – Oct 2017 · 3 yrs 7 mos · Nebraska, United States

• Project at FCSA: Loan Accounting ecosystem, the heart of FCSA's business, rewrite.
• Details projects:
• + Enterprise Release Notes (Angular 2)
• + Total Return (Angular 2)
• + Loan Accounting System Rewrite (LASR, Angular 2, Micro Service, Service Fabric)
• Technology: Full stack with Angular 2 (heavily), Azure Cloud Service Fabric (with Microservice), ElasticSearch, Webpack, NodeJS, TypeScript, Wallaby, NCrunch, C# & MSSQL in fully Continuous Delivery (No Downtime Deployment Architecture) - Agile environment.

Mar 2014 – Sep 2017 · 3 yrs 6 mos · Nebraska, United States

• Projects - Launched to PROD: Agrinomics 2.0, ARRG, RiskRating, FinancialDataMart, AgriLytic 2.0, Customer Financial, Agripoint
• Design & Develop a financial banking ecosystem application (websites @ front-end & services @ back-end) of Farm Credit business for Loan originating & processing including a real-time financial web enterprise application which interacts with 15-20 service systems (SOA architecture) that handle financial data, web services calls to credit history, risk rating, liability information, and ultimately determine if a loan can be approved.
• Scope & Role: Full SDLC, from scratch (front to back end).
• Methodology: Agile, Pair-programming, Continuous Delivery
• Technologies: SOA, SPA, (DDD & TDD & CQRS, Event Driven), Design Patterns, Cloud (Azure,AWS), Service bus (publisher/subscriber, mediator service), Window service
• Languages: C#.Net, AngularJS, MVC5, EF6 (Code First), Web API2, TypeScript, CoffeeScript, UnderScoreJS/Lodash, JQuery, SignalR, HTML5, CSS3, JQuery, JavaScript, Bootstrap UI, Kendo UI, FakeItEasy, Karma/Jasmine/Protractor/NodeJS/PhantomJS, Unity, NUnit, MSSQL2012, SSRS, SSIS, WCF
• Tools: VS2015, TFS, Resharper,Git, IIS & Node.js, Web socket(.Net Pusher Server, signalR), Ncrunch, SourceTree/Git Extension, Stylecop, Octopus, Team City, Visual Studio Online, Fluent Validation, Auto Mapper, Newrelic, etc
• Activities: Ethic hacking contest (2014, 2015), Blitz ball game tournament, FCSA Race tournament, Table tennis tournament, Internal Developer User Group (Speaker), Omaha Technology User Group (Speaker)

Jan 2013 – Feb 2014 · 1 yr 1 mo · Florida, United States

• Responsible for the Architecture of PTS (Policy Tracking System), an insurance business software solution (Quote Engine, Policy Management Engine, Rating Engine, Accounting Engine, Claim Engine, Audit/Report Engine, Batching Engine, User Management Engine, Form Engine, etc.).
• Build start-up Application Research & Development team (Agile environment).
• Prime developer of Financial - Accounting systems
• Design & Develop & Maintain software solutions to best serve insurance business
• Flagship projects:
• + Accounting for PTS: Design & Develop accounting system of PTS from A-Z (using C#, SQL, ColdFusion, JQuery, etc.)
• + Clearing House Integration: Design & Develop the service & website integration of Clearing House Citizen system to PTS (using C#, WCF, EF6, MVC5, SQL, ColdFusion, JQuery, Web API, SignalR, etc.)
• + Rating Engine: Implement rating when Forms changed or Rate changed (each 6 months - C#.Net, ColdFusion, MSSQL, Web API) according to State's law
• + Automation: TFS 2013 Automatic build and Deploy (DEV-QA-PROD), Coded UI, Unit Test
• Technologies: Microsoft Stacks: Web (responsive), Web API, SOA, .Net (MVC4, EF Code First), MSSQL, SharePoint, Business Intelligence, etc.
• Languages: C#.Net, MVC, WCF, ColdFusion, MSSQL, HTML(5), JavaScript, CSS(3), JQuery, Web API, AngularJS, etc.
• Tools: VS2013, ReSharper, PostSharp, TFS, Process monitor, Fiddler, SyncToy, Agent Ransack, WCFStorm, Log4Net, AppFabric, Batch script, IIS Web deployment, Load Balancer, etc.

Feb 2012 – Feb 2013 · 1 yr · Florida, United States

• Developer leads of R&D, Agile team & focusing on Telecom Crew Manager Solutions, a disconnected mobile & website ecosystem.
• Solutions break down (web app, tablet app and service app, built from scratch):
• 1. Crew Manager site: Website application version to manage construction workflow (https://crewmanager.certusview.com)
• 2. Crew Tablet: Window client application version to support occasionally connection environment
• 3. Synchronization Service: Sync between crew tablet and Center database.
• Process: Agile
• Roles:
• 1. Responsible for the Architecture of the enterprise solution.
• 2. Developer on website, window app and internal services of the projects.
• 3. Work with customer for getting requirements, making demonstration.
• 4. Co-operate with other developers in R&D team, QA and other departments (data management, graphic design, Infrastructure, IT system, project management) regarding to all aspects of projects.
• Key Technologies: C#.Net, ASP.Net, WCF, WPF, MSSQL, SQLCE, EF, LINQ, etc with latest released versions.
• Tools: IIS, Telerik, Advance Installer, TFS, Jquery, Ajax, RedGate, Load balancer, Blended Agile (with Waterfall), etc

Jan 2011 – Feb 2012 · 1 yr 1 mo · Florida, United States

• Worked in R&D team on the Switch-based telecommunication/ Mobile projects mainly focus on E-commerce web development system to do international call backs, international calling cards, direct dial, ANI callback, wholesale international calling, and Web trigger callback.
• Played role as Sr. Developer to co-ordinate between sale, marketing, customer service and technical support departments to provide the best quality solutions to customers.
• Solution List:
• 1. https://www.uwtmobile.com
• 2. https://lineaencasa.com
• 3. https://www.globalcallforwarding.com
• 4. Open sources: Live chat tool, Control Panel management system
• Process: Agile
• Roles:
• 1. Prime in database design & web development. Participated in the projects from scratch.
• 2. Work directly with marketing team, technical support team and customer service team to get requirements.
• Key technologies: C#, ASP, ASP.Net, MVC, JavaScript, Jquery, CSS, HTML, Ajax, MSSQL, SEO, Google Analytics, etc

May 2010 – Jan 2012 · 1 yr 8 mos · Iowa

• Finished Master of Computer Program with honor graduation.
• Worked as Teaching Assistant for: Algorithm, Distributed Computing, Computer Security.
• Researched fields: Design Patterns, Framework development

Jan 2008 – Dec 2010 · 2 yrs 11 mos · Korea/USA

• Worked in R&D team to navigate a variety of Web application development and Embedded software projects through the complete SDLC, role as senior developer as well as project leader. Focus in many aspects of programming languages and tools in multi-platform environment (Embedded, web with Java, .Net, C#, C++).
• Project List:
• 1. EasyReport5 (as Sr. Developer) certified by Hewlett Packard as Gold Solution
• 2. EasyFax2Email(as Project Leader) certified by Hewlett Packard as Gold Solution
• 3. EasyDocDistribution as Sr.Developer, build from scratch
• 4. EasyPrintSaver as Sr.Developer, built from scratch
• Process: Agile
• Key technologies: Used multiple languages and cross platform such as C#, ASP.Net, MVC, WPF, Java, C++, MSSQL in Linux, window, embedded, etc depends on business requirements and projects.
• Roles:
• 1. Responsible for all the aspect of design & coding of the project
• 2. Work closely with R&D manager to secure the direction and quality of projects
• 3. Work directly with internal QA & second line customer support.
• Activities: Vice President Of Membership at Sinchon ToastMaster (http://sctm.toastmastersclubs.org): One of the leaders of the group, responsible for all member perspective including coaching, training new members, develop the improving path for each individual members, advisor, etc.

Feb 2005 – Dec 2007 · 2 yrs 10 mos · Massachusetts, United States

• Graduated Bachelor, employed (by TMA Agency) to work as onsite Consultant for Nortel Networks. Converted straight to Sr.Developer then Lead Developer (by Nortel) as Nortel's global employee after first 3 months of working at Billerica, Massachusetts. Co-ordinate with onsite engineers to lead offshore team to deliver the feature successfully to Telstra.
• Project list:
• 1. Broadband Remote Access Server (BRAS): Enterprise product/feature development
• 2. Multimedia Access Contact Center (MACC): Product sustaining
• 3. Gateway GPRS Support Node (GGSN): Product sustaining
• Process: CMMi5, Toastmaster, SDLC Management
• Key technologies: C++, C#.Net, Clearcase, Citrix
• Development environment: Window, Vxwork (Linux)
• Roles:
• 1. As Prime developer, work directly with Nortel architecture on technical aspects and work with Project Manager on management aspects.
• 2. Interface between Nortel and Offshore team.