EXECUTIVE SUMMARY

• Versatile solution architect with accomplishments in engineering management, program management, and product management
• Solid hands-on engineering and managerial roles in large corporations and start-ups
• Profound domain knowledge in mobile/wireless and Internet industry
• Proven success in customer-facing professional service and technical consultancy roles
• Offers global work experience (US, APAC, EMEA, CALA) with a sound understanding of Silicon Valley work cultures
• Excellent communication skills and ability to collaborate for success on highly technical projects
• Technical skills in
• Wireless network and mobile applications: 3GPP/GSM, 3GPP2/CDMA, WCDMA, LTE/SAE, SS7, SIGTRAN, SDP/IMS, Diameter, SMS/SMPP, MMS/MM7, VoIP/SIP, Mobile IP, GTP, OMA DM, OTA FOTA, M2M, MTM, LBS, Xcode/iOS, Android, VoiceXML, Voice mail, IVR, Unified Communications;
• Software engineering: Unix/Linux, shell scripts, C/C++, Java, Matlab, SQL, noSQL, UML, ER Modeling, JavaScript, HTML5, JBOSS, Weblogic, Tomcat, nginx, JMS, ActiveMQ, PostgreSQL, Oracle, JMeter, TCP/IP, HTTP, XML, SOAP, REST, JSON, TCP/IP, SOA, LDAP, SNMP, Google/Facebook/Twitter APIs, OAuth, open ID, SSL;
• Business tools and frameworks: Jira, Wiki, Trac, Eclipse, SVN, git, Ant, Hudson, GoogleAnaytics, Amazon EC2 (AWS), Hypervisors, Nagios, Godaddy, SurveyMonkey, Assistly

PROFESSIONAL EXPERIENCE

Confidential, Sunnyvale, CA (Mar 2008 to Present)
A wellness/health project being incubated by SK Telecom Americas. The solution consists of web portals, server platform, informatics/analytics engine, PC clients, mobile clients (Android, iPhone, BlackBerry), and activity tracking device (hardware)

Principal Architect

• Wearing multiple hats in a stealth-mode project: Architect/Systems Engineering, Program Management, Technical Operation, and Product Management
• Architect / Systems Engineering
• Defined the N-tier server platform architecture of DBMS, MOM, WAS, and Web.
• Architecting the end to end solution comprising of sensor devices, mobile clients, PC clients, web portals, and analytics engines.
• Designed rule based wellness analytics engines to process user data and contents
• Defining server - client APIs and server - server interfaces on REST, HTTP/RPC, and sftp
• Led the PaC (Performance and Capacity) testing to characterize the system performance metrics
• Researching new mobile and web technologies to define technology roadmap
• Defined SKTA communication platform and presented it in the SDP and IMS conferences
• Engineering Management / Program Management
• Built an onshore and offshore (China, Korea) engineering/QA team from the ground up
• Migrated a big portion of the engineering team to offshore to achieve over 80% cost reduction
• Established scrum-based agile SDLC using SVN, Jira, and wiki
• Managing assignments and deliverables of software and QA engineers
• Evaluating, mentoring and guiding engineers
• Product Management / Service Operation
• Writing technical requirement specifications and PRDs. Scoping, scheduling and tracking product sprints and releases
• Working with UI/UX team to define and implement mobile/web UX
• Working with business team to evaluate development cost for the ROI and P & L analysis
• Supporting marketing team by writing white papers, solution presentations, and manuals
• Deploying and operating pilot and beta systems in EC2 for health institutions and business partners, ensuring compliance to HIPAA

Confidential, Sunnyvale, CA ( Jan 2004 to Feb 2008)
A privately-held software vendor delivering Mobile Device Management (MDM) solution to wireless carriers and mobile device manufacturers. The solution consists of a server, deployed in the data center or cloud, and a client on a mobile platform

Solution Architect

• Provided pre/post-sales technical consultancy role in the deployment of MDM solution in wireless service providers\' (AT & T Wireless, Verizon Wireless, Vodafone, eMobile, KDDI, China Unicom) networks and device manufacturers\' (Samsung, Motorola, LG) platforms
• Was the Person of Contact (POC) for all technical issues from customer sites. Performed customer engagement and advocacy role, requirement & gap analysis, architecture design, product demos, solutions consulting, proposals and presentations, trial/beta services, RFP/RFI responses, customer acceptance test, post-deployment enhancements, and solution upgrades
• Defined the solution deployment architecture by collecting, negotiating, and analyzing customer requirements on performance, scalability, and reliability
• Led the PaC (Performance and Capacity) testing to characterize the performance metrics against carriers\' requirements
• Spearheaded the eco-system initiative to work with technology partners and system integrators to fill the gaps not supported by the InnoPath product, to deliver a complete solution
• Wrote product and solutions requirements for core engineering.
• Managed change requirements of customers
• Wrote whitepapers and training materials. Educated wireless carriers\' OSS/BSS personnel to launch and operate the service
• Researched OMA standards. Attended OMA meetings and IOT events

Sr. Engineering Project Manager

• Built and managed an onshore and offshore professional engineering team to implement and deliver carrier specific requirements

Confidential, San Jose, CA (July 1999 to Sept 2003)
A privately-held company delivering enhanced communication service platforms to wireline and mobile carriers

Sr. Product Manager

• Owned the complete product lifecycle management (PLM) of the unified communication and messaging product suites (voice mail, SMS, MMS, Unified Communications, SS7, VoIP) from inception to launch
• Managed a cross-functional team of engineering, marketing, and customer supports to define and prioritize product requirements and roadmap. Wrote use cases and PRDs
• Executed P & L and ROI analysis. Defined product pricing and packaging
• Supported sales by providing product demos and presentations, white papers and other sales collaterals, and RFP/RFI responses

Sr. Pre-Sales/Systems Engineer

• Served as the top-tier escalation point for technical issues rising from global pre-sales activities
• Provided technical consultations to sales, sales engineers, and customers in US, Asia, and Europe
• Provided technical answers to RFPs/RFIs/RFQs

Confidential, Seoul, Korea (Aug 1994 to June 1999)
A wireless carrier pioneered the CDMA technology. Currently a part of SK Telecom, the leading wireless carrier in Korea

Engineering Manager

• Joined the company as one of the initial members. Designed and deployed the CDMA network, comprising of thousands of core and radio network entities and highly sophisticated OSS/BSS infrastructure
• Interfaced with various stakeholders in the company to define the feature and functionality requirements of value added services including voice mail, SMS, Voice Activated Dialing (VAD), LBS, and other wireless data applications
• Architected and designed service/call flows and protocols among network entities under 3GPP2 standards
• Developed, launched and operated the aforementioned value added service platforms and user applications
• Owned and executed acceptance and interoperability tests among network entities like SMSC, MSC, HLR, Voice Mail, VAD, IWF, and OSS/BSS
• Led the RFP and evaluation processes of hardware and software vendors

EARLIER EMPLOYMENTS

Software engineer for Confidential, Korea Telecom, Seoul, Korea
Research engineer for Confidential, Taejon, Korea

EDUCATION

MS in Computer Science (Thesis on Distributed Databases)
BS in Computer Science and Statistics