Swee Huat Sng

sweehsng@gmail.com

S U M M A R Y

I have 20+ years of software engineering experience creating successful business solutions that encompass networked embedded

devices, internet gateways and backend cloud services. I hold a Bachelors Degree (Hons) in Electrical & Electronic Engineering. I

have worked for Xerox, Peerless Systems, Canon and Sharp.

I am proficient in various programming/scripting languages including x86 Assembly, C/C++, C#, Lua, Java, JavaScript, shell and

awk. I am very comfortable developing low-level device drivers to handle hardware Interrupt Requests, as well as high-level serverside

applications to service Remote Method Invocations.

I strive to express myself with utmost clarity in both written and oral communications. I am good at solving challenging problems

with elegant engineering solutions.

My technical experience and interests include:

• Cloud application development and deployment on Amazon AWS

• Web application security issues (XSRF, XSS, HTML injection) and Single-SignOn (CAS2, OAuth, ClientLogin, AuthSub)

schemes

• Network protocols (HTTP, TCP/IP, UDP)

• Network stacks (TCP/IP, NDIS, TDI, BSD socket layer)

• Embedded web servers (AppWeb, Boa, Nginx) and server-side scripting (EJS, ESP, Lua, CGI using shell/sed/awk)

• Content Management Systems (WordPress, Nuxeo)

• Cross-platform mobile application development (iOS, Android) using alternative SDKs like PhoneGap, Appcelerator Titanium,

Corona, Moai and Gideros Mobile

• Embedded firmware development on embedded Linux (MontaVista), Windows XP Embedded and vxWorks

My recent work achievements include:

• Architected and implemented cloud-based remote device discovery/management system, allowing remote discovery and

monitoring of MFPs behind a firewall

• Architected and implemented Sharp OSA 4.x platform, enabling execution of custom MFP imaging (print/scan/copy)

applications

• Designed and implemented custom Single-SignOn (SSO) component based on CAS2

• Filed several patents in the fields of cloud, web and networking

E X P E R I E N C E

Sharp Labs of America

Principal Software Architect

Member of the Business Solutions Technologies group, responsible for integrating Sharp office equipment with public and enterprise

cloud services.

Achievements include:

• Extended proprietary network protocol stack in vxWorks to add loopback device support

• Created Sharp OSA 4.x, an embedded web application platform for Sharp MFPs (copiers), by integrating opensource projects

gSOAP, libcURL, unzip, djpeg and Appweb

02/2007 - Present

• Prototyped embedded cloud connectors to well-known web services like Zoho, Yahoo and GoogleDocs

• Created a cloud-based remote device discovery/management system for managing customer devices behind firewalls

• Created a dynamic web services framework that allows imaging (scan, print, store, OCR, preview) workflows to be composed

from distributed remote and local web services

• Invented a novel way of utilizing a social network to manage and control embedded devices behind firewalls

• Filed several patents in the fields of cloud, web and networking technologies

• Implemented custom Single-SignOn (SSO) authentication/login component based on CAS2 protocol

• Implemented Lua filters in Nginx to support server integrity checks, and to work around upstream server bugs/limitations

• Optimized server performance through caching and JVM tuning

• Worked with third-party Nginx modules (Lua, PageSpeed)

Skills acquired: Hands-on development in web technologies like SOAP, REST, HTTP, HTML, JavaScript, EJS (Embedded

JavaScript), ESP (Embedded Server Pages). Architecting a full-featured platform that supports the deployment of embedded web

applications. Integrating open source components to create a final workable solution. Designing systems that integrate cloud and

embedded device components. Proficiency in network tools like WireShark, tcpdump, netcat and cURL. Experience in Android

SDK/NDK development environments. Amazon AWS infrastructure design. Nginx deployment, configuration and Lua filter

development. Network device discovery using WSD, OSA and SNMP.

Peerless Systems Corporation

Principal Software Engineer

Member of the Embedded Networking SDK team.

Achievements include:

• Implemented WSD (Web Services for Devices) component of the PeerlessNet SDK suite, using gSOAP as the parsing engine

• Developed Windows test application using C# on Visual Studio .NET 2005

• Product was tested and verified to work with Windows Rally technology on Windows Vista.

Skills acquired: Web services technologies (SOAP, WSDL, XSD) development using gSOAP and Visual Studio .NET 2005.

Microsoft Windows Rally technology on Windows Vista. Windows application programming using C# on Visual Studio .NET

2005. Network device discovery through WSD.

Canon Development Americas, Inc

Member of Engineering Team

Member of the Advanced Technologies engineering team.

Achievements include:

• Implemented WSD (Web Services for Devices) client applications to verify WSD protocol compliance during Microsoft

Interop

• Designed and implemented the Windows XP embedded NDIS intermediate network driver for Network Mimic, a system

that mimics the MAC address and IP address of any network target; it allows deployment of custom network applications

that extend the functionality of the mimicked target

• Involved in design and implementation of NELite, an embedded Linux-based device for deploying network services on

legacy Canon printers and MFPs

• Designed and developed Secure Print and Hold, a secure printing system that uses LPR protocol to transport encrypted

print data stream

• Involved in implementing Canon Service Portal, a cloud-based client/server system for automatically delivering software

updates to the NELite

• Created web pages and CGI scripts (shell/sed/awk) for boa web server running on the NELite

• Developed an RS232 Linux kernel device driver to interface with IPC-capable Canon MFPs; all Canon enterprise

copiers support a proprietary serial control protocol called IPC

10/2000 - 08/2006

08/2006 - 02/2007

• Created an SDK to allow developers to develop IPC applications targeting Canon printers and copiers

Skills acquired: Linux application and device driver development. Device driver troubleshooting using logic analyzer. CGI

scripting in embedded systems. Network application programming for Linux and Windows. Network device driver

development in Windows. Familiarity with XML and SOAP. Developing secure applications utilizing OpenSSL. Java

programming. Windows application programming using C++ and C# on Visual Studio .NET 2003. Windows system-level

configuration through WMI (Windows Management Instrumentation). Development experience for MEAP, an embedded

JVM platform in Canon MFPs. Network device discovery using WSD and SNMP.

Peerless Systems Corporation

Software Engineer

Member of the Printer Firmware Engineering team.

Achievements include:

• Involved in design of print engine interface module using Rhapsody in C from iLogix; created UML object model

diagrams, state charts and sequence diagrams

• Achieved board bring-up for Superboard, a PowerPC 740-based scalable print controller architecture capable of

supporting single or multiple imaging ASIC daughter boards; resolved hardware issues using logic analyzer and firmware

issues using SDS SingleStep debugger

• In charge of creating and maintaining makefile for PeerlessPage firmware build utilizing OPUS make; added options for

mirroring source files on alternate source tree and generating dependencies

• Ported PeerlessPage PCL5e and PCL XL emulators from Windows platform to Sun Solaris platform; final application was

deployed in a high-performance printing system utilizing a Sun UltraSparc print server

• Responsible for maintaining and customizing PeerlessPage PC simulator, which is a simulation of the firmware code

running in Windows; integrated Adobe PostScript enhancements into PC simulator and ultimately into firmware code

Skills acquired: Object-oriented design and testing using Rhapsody in C UML tool. Hardware troubleshooting using

oscilloscope and logic analyzer. Debugging using SDS SingleStep Debugger. Code generation using Diab compiler/linker

tools. Creating and maintaining makefiles for UNIX and DOS application builds. Familiarity with GNU tools on Sun Solaris

development environment.

Xerox Singapore Software Center

Software Engineer

Member of the Printer Firmware team.

Achievements include:

• Developed firmware for Xerox desktop laser printers

• Ported Pacer’s AppleTalk protocol stack and developed vxWorks device drivers to interface with the LocalTalk board

• Ported PhoenixPage PCL5e and Postscript level 2 onto target printers

• Maintained firmware for Xerox desktop laser printers by fixing firmware bugs

• Developed firmware for a Xerox MICR (Magnetic Ink Character Recognition) security system for printing checks;

implemented the low-level I/O routines and ISRs (Interrupt Service Routines) for IEEE 1284 parallel port, RS 232 serial

port and IOT (print engine) interfaces, as well as the POST (Power On Self Test) and initialization code for all subsystems

including PIC (Programmable Interrupt Controller), DMA (Dynamic Memory Access), RTC (Real Time Clock), parallel

and serial ports, and RAM

Skills acquired: Software development in UNIX environment. Proficiency in software porting. Familiarity with PCL5e and

Postscript level 2 printer languages. Real-time embedded systems programming, programming in mixed-language (C and

assembly language) environment, low-level system programming, vxWorks programming, device driver development and

Windows NT programming.

04/1994 - 04/1999

04/1999 - 10/2000

E D U C A T I O N

Nanyang Technological University

1990 - 1994

BEng , EEE

Victoria Junior College

GCE A Levels , Science

Catholic High School

A W A R D S

Sharp Labs of America JVO Award

Sharp Corporation Excellence Award

Sharp Labs of America Invention of the Year Award

Sharp Labs of America Invention of the Year Award

P A T E N T S

Method for configuring a device using simple pictograms

US Patent: 8,176,427 · Inventors: Swee Huat Sng, Sebastien Jean

Method and system for comprehensive socket application programming interface loopback

processing

US Patent: 8,286,197 · Inventors: Swee Huat Sng

Method and system for socket API call emulation

US Patent: 8,413,172 · Inventors: Swee Huat Sng

Sandboxed Daemon Process Invocation through HTTP

US Patent: 8,825,748 · Inventors: Swee Huat Sng, Joseph Yang

Devices and Methods for Redirecting a Browser to Access Computer Resource Behind a Network

Firewall

US Filing: 2011/0252,117 · Inventors: Swee Huat Sng, Lena Sojian

Devices and Methods for Using HTTP Encapsulation to Access Web Resources

US Filing: 2012/0030,746 · Inventors: Swee Huat Sng, Weifeng Yao

Document imaging node with internal web server execution environment

US Filing: 2012/0188,584 · Inventors: Swee Huat Sng, Joseph Yang

Method and System for Indirectly Establishing a Unique Communication Channel Between a

Plurality of Devices

US Filing: 2013/0111,009 · Inventors: Swee Huat Sng, Lena Sojian

1986 - 1987

1982 - 1985

2011

2009

2009

2007