Sean's Old Resume

Sean H. Yang

I am a disciplined C/C#/perl/UNIX developer with a firm grounding in digital multimedia applications, server-side web technologies with relational databases, and sophisticated client-side graphical interfaces. I am seeking a job in producing cutting-edge consumer applications in an environment that provides ample challenges and opportunities for knowledge growth.

Work Experience

2008 to present Technical Yahoo, Yahoo! Inc.
  • working working working...
2002 to 2008 Software Development Engineer, Toshiba America Electronic Components, Inc.
  • designing and developing new features (channel browser, directory browser, image viewer, etc.) for Toshiba's digital television application.
  • optimizing image decoding application by implementing faster algorithms, using inline assembly and other techniques.
  • tools to interact/adjust television features from a computer over network.
  • developing, debugging and enhancing video decoding firmware for Toshiba's LSI; designed and implemented firmware with automatic frame buffer management for single full-HD or dual half-HD decoding with minimum memory usage, and video output timing generation mechanism without application intervention
  • working with engineers in the U.S., Germany and Taiwan to create Linux-based ATSC and DVB-T televisions
  • working with engineers in the U.S. and Japan to create a Linux-based consumer digital video recorder
  • designing and developing hardware abstraction API layer for a multimedia processor capable of real-time MPEG2 encoding and decoding
  • creating build, package and test frameworks for hardware abstraction API layer
  • MPEG2 TS/PS, VBI CC/WSS stream parsing and analysis
  • video playback trick play with audio/video synchronization, hardware/system resource management and data transfer tuning/analysis
  • video encoding with data pattern optimization
  • developed Linux PCM device driver to support a subset of OSS ioctl calls
  • Tetris on our prototype board to verify graphics capabilities of our multimedia processor
  • experience working with various formats of audio/video streams
1999 to 2002 Development Tools Engineer, Portal Software, Inc. (now acquired by Oracle)
  • creating browser-independent DHTML and JavaScript interfaces displaying dynamic views of downloadable products customized for each customer on
  • constructing a Oracle database to track Continuus metadata for over 500,000 elements in the SCM migration from Continuus to ClearCase
  • designing a UNIX filesystem hierarchy which supports the native Continuus directory structure, relative symbolic linking to nested objects, and automatically mapping this hierarchy to hundreds of UCM components to 8+ ClearCase VOBs via scripts
  • implementing a platform-independent CRC utility in C and perl to provide checksums on binary executables
  • analyzing server logs created from web server usage, operating system events, and software build operations with UNIX shell scripts
  • matching build error messages with SCM activities to generate detailed e-mail notification to build-breaking developers
  • generating statistical reports for source code files (e.g. C++, Java, perl, Windows Resource, SQL, makefiles, proprietary Portal file formats) in perl
  • modifying Oracle databases for and ClearQuest
  • administering FrontPage Web Service to enable publication of internal Engineering guides, procedures, and FAQs
  • performing user support of Continuus and ClearCase/ClearQuest
  • authoring online training resources to install, administer, and maintain Portal's SCM end-user clients
  • designing centralized web portal GUI to provide build system administration and scheduling in JavaScript and perl
  • executing and troubleshooting integration and nightly builds
  • producing product packaging (e.g. labels, CD jackets) and CD/DVD discs of Portal software for customers, Marketing, and Legal
1998 to 1999 Student System Administrator, SCU Design Center
  • manage 90 workstations (mixture of UNIX and NT machines) for SCUDC, computing center for school of Engineering
  • installing hardware, maintain environment from print queue to software installation
  • converting shell scripts between various shells

Skill and Knowledge

programming languages

  • C/C++/C#
  • Perl, web CGI
  • JavaScript/DHTML, browser-independent web pages
  • UNIX shell script
  • applications/scripts with Oracle database interaction, data modeling and planning
  • makefiles (make, nmake)
  • exposure to PHP, MySQL, PL/SQL, Java, FORTRAN, BASIC, and x86/MIPS assembly

programming software packages

  • MS Visual Studio, MS .Net Platform, Managed Direct X
  • Keil/FS2 on CAST8051
  • perl CGI, DBI, GD, PerLDAP
  • VMWare
  • Perforce, Continuus/CM, ClearCase, ClearQuest, Visual Source Safe
  • vi, vim, gdb
  • bash, csh, Cygwin, MS command shell
  • Sony Playstation proprietary C libraries (Net Yaroze)
  • exposure to MFC, WinAPI, Windows Forms

web and graphics design

  • CSS, complex table layout, strong visual organization
  • hand-coded HTML, CSS and JavaScript code from scratch; rich experience with vector graphics prototyping to HTML page design
  • attention to usability and dynamic interaction through DHTML and JavaScript
  • MediaWiki setup, customization and administration experience
  • expertise in using CorelDraw, Photoshop, Dreamweaver, Fireworks and Illustrator for web site graphics and layout
  • 3D rendering and animation packages such as Luxology Modo and Hash Animation:Master

hardware tools

  • oscilloscope
  • logic analyzers
  • stream/video/HDMI signal generators
  • Yokogawa hardware debuggers

system administration

  • hardware configuration/installation, rack mounting (Compaq Proliant, HP N-class, Sun E250, E450, HP D-class)
  • installing/compiling OS kernel, compilers and applications (e.g. Oracle, Continuus) on Linux, HP-UX, Solaris and Windows
  • upgrading hardware (CPU, memory, hard drives)
  • UNIX shell commands, Windows registry, file sharing, SAM, swinstall
  • can read manuals, RFC, etc. =)

operating systems

  • Linux, Solaris, HP-UX
  • Windows XP/2000/NT/Vista/TSM
  • MS-DOS, Windows 98/95
  • MacOS X
  • exposure to BeOS, IRIX, MacOS 8

Education and Training

training and conference

  • KNK Seminars & Strategies, MPEG4 Technologies and Applications
  • KNK Seminars & Strageties, H.264 / Advanced Video Coding
  • Managing Software Projects with Rational ClearCase and UCM, ClearCase administration
  • Fundamentals of Rational ClearCase and UCM, developer class of ClearCase and ClearQuest
  • Enterprise DBA Part 1A: Administration and Architecture, Oracle database
  • Introduction to Oracle: SQL and PL/SQL
  • Continuus/CM administration
  • Continuus/CM developer and build manager


1999 Santa Clara University
B.S. in computer science,
minor in computer engineering and Japanese

  • programming related: Data Structures, Computer Networks (Simple FTP client/server), Windows Programming (WinAPI and MFC), Computer Graphics, Parallel and Concurrent Programming
  • math: Cryptography and Cryptanalysis, Theory of Algorithms, Multimedia Compression
  • general engineering: Operating Systems, Software Tool Design, Logic Design

Additional Skills

  • fluent traditional Chinese (Mandarin)
  • intermediate knowledge of Japanese

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