Jonathan "Sheer" Pullen

Professional Experience

Volunteer Experience

Summary of Qualifications

2007 » Present

Consultant

Kanvas, Laguna Beach, CA

• Wrote an engine to parse incoming mail, strip attachments, and convert them into SWF format for viewing inside a SWF application.


• Made a number of improvements to a Flex STOMP client in order to support using it for binary messaging.


• Refactored and rewrote a proof of concept application to perform whiteboarding and annotations inside a web browser.


• Designed a database to store information about binary assets and users, and wrote PHP scripts to prove an XML API to that database for a Flex application.

2005 » Present

Consultant

Fisix, Laguna Beach, CA

• Wrote an application to implement an expert system on multiple platforms that walks users through emergency medical protocols based on simple yes/no answers. Application gets protocol logic out of an XML file and audio prompting out of OGG files.


• Wrote a Perl application to parse a complex XML file into a simple XML file, to convert WAV files to OGG and AMR files, and to build a windows installer script to copy the appropriate files to a PDA.


• Wrote a Java application to run on a MIDP-2.0 mobile phone and display menus and prompts based on a XML file. The application also plays audio prompts that are stored in AMR files.


• Wrote a complex windowing UI in Laszlo, including objects to communicate with a Pick database and to retrieve order and user information, objects to display graphs and alerts, and objects to permit configuration.


• Rewrote significant portions of a Flex whiteboard application. Changed the application to use STOMP instead of FDS for messaging, to support an event-driven mouse driver system with callbacks and binding, and to support using a database-driven message storage system.


• Developed a proof of concept Flex application that loads as a transparent overlay over a web page and allows annotation of that web page.


• Rewrote Codehaus's open-source STOMP client in Flex adding significant functionality, including the ability to receive channelized messages, and the ability to send and receive binary messages including objects.


• Wrote an automated email document converter in Perl that can take emailed files in DOC, XLS, BMP, GIF, JPG, and several other formats, and convert them all to SWF files that can be viewed in any web browser and email a link back to the sender.


• Wrote a number of database access scripts in PHP to feed XML data to a Flex application.


• Configured a number of Ubuntu Linux servers to act as web servers, database servers, and application servers.


• Configured a Pick database to use a RAM disk for all data storage and optimized it in several other ways, improving the time for a complex data sort operation from 2 days to 4 hours.


• Wrote scripts to automatically maintain CIFS/Samba mounts.


• Maintained several Linux servers running RainingData's D3 non-relational database engine.


• Wrote scripts to monitor the health of D3, Linux, and the IO subsystem of Linux, to help troubleshoot and improve performance of D3.


• Wrote a D3/SMTP gateway.


• Imported a 220 million row database from MS SQL into MySql using a public SQL gateway that would only permit queries to run for 10 minutes


• Optimized filesystems and configuration files to maximize mysql performance on heavily loaded systems


• Configured ArcGIS servers


• Helped build a proof of concept Flex user interface for ArcGIS data


• Configured Cisco CSS switches to distribute load and provide redundancy


• Configured Cisco PIX firewalls to permit remote users to connect via VPN with split tunneling to aid administration

2003 » 2005

Consultant

Headwaters Data Management Systems, Pettigrew, AR

• Wrote two applications for Atmel AVR microcontrollers to build advanced multiplexed interrupt-driven UARTs,with data logging to flash memory.


• Wrote three applications for Windows CE to support downloading transaction data, auditing, programming, and otherwise manipulating electronic parking meters.

2002

Consultant

Circle-R, Houston, TX

• Wrote application in VBA to assist in sorting of assets to be distributed to franchise stores.

2002

Consultant

EV Parts, Lynwood, WA

• Converted several databases from a proprietary, undocumented format to a format used by an open source web store.


• Wrote and modified a number of PHP scripts to support functionality needed by evparts.com.


• Configured firewall, mail server, file server, and other core functionality for evparts.com

2001

Senior System Architect

Loudeye Technologies, Seattle, WA (fka Encoding.com)

• Designed and helped implement a redundant network of web and application servers using MySQL, Resin, Apache, and F5 BIGiP load balancers.


• Wrote scripts to modify the normal failover behavior of the F5 load balancers and to perform extended service checks on databases.


• Wrote a modified version of RealAudio's g2slta (simulated live transfer agent) to allow choice of which clips to play based on information stored in a database, and to send URL events at configurable times, including in the middle of clips.


• Assisted in the porting of RealAudio plugins from Windows (MFC) to Linux.

1999 » 2001

Senior System Architect

OnAir.com Streaming Networks, Irvine, CA (fka WWW.COM)

• Designed and helped to implement a streaming network capable of delivering 10,000 simultaneous on-demand streams from a 2.1Tbyte SAN using Sistena Software's Global File System.


• Wrote software to protect against unauthorized streaming and aid metrics collection by using tokenized URLs by means of single threaded Unix daemon that interfaced to a modified Samba server.


• Wrote software to process RealAudio and Windows Media streaming logs and give comprehensive metrics reports.


• Designed and maintained Oracle and MySQL databases.


• Configured and maintained BigIP load balancers and Extreme switches, including advanced troubleshooting of packet loss and latency issues and configuring of advanced (OSPF) routing.


• Modified CGI scripts to improve searches and joins of a 3 table X 1.5 million row database. Improved search speeds from 2s to 150ms.


• Assisted in maintaining the internal network, including configuring Cisco Pix firewalls, Linux firewalls, Cisco routers, dual-horizon name servers, mail servers, Samba servers, and a host of other minor administration tasks.


• Wrote a trouble-ticket tracking system for the tracking of internal and external problems.

1998 » 1999

Consultant

Headwaters Information Management Systems, Pettigrew, AR

• Wrote application in MFC C++ to take data from an Access database and send it over a serial port to a handheld micro, and vice versa, including support for a multi-micro serial bus.


• Wrote application in ANSI C to run on a NEC V20 based handheld micro (Husky FS/2) to collect data from parking meters through an infrared interface, and store them on a solid state disk for retrieval through a protocol and application mentioned above.


• Reverse-engineered an existing application to figure out how to communicate with a series of parking meters.

1996 » 1998

Tech Support - Senior System Architect

Epoch Internet, Irvine, CA

• Designed and implemented mail, news, radius authentication, DNS, and communication methodologies ("glue") enabling all these services to be tied to a central registration server.


• Maintained a mail server with over 40,000 active accounts, and over 100,000 dormant accounts. Performed upgrades as necessary.


• Implemented and maintained two news servers, first on DEC AlphaServers with individual volumes, and then on Sun UltraSparcs with MTI fiberchannel RAID arrays.


• Helped train system administrators.


• Helped train technical support staff including authoring a training manual to that end.


• Debugged T1, OC3, and T1 frame relay lines over twisted pair, coax, and fiber connections.


• Wrote and maintained simple CGI scripts for client web sites.


• Assisted in the administration, backup, and maintenance of several web servers.


• Located and fixed several severe security holes, both in locally authored software and in off-the-shelf software.


• Administered several AIX machines providing a variety of services.


• Installed and configured Gauntlet, Altavista, and FWTK firewalls.


• Helped design and implement a modern Network Operations Center (NOC).


• Designed and implemented a high-capacity automated backup system, including building a secondary network, configuring Legato and several tape robots, and installing network clients on WinNT, OSF/1, AIX, and Linux as well as database backup clients for Oracle and MS SQL server.

1996

Tech Support - Tech Support Level III

Support System Developers, Fairfax, VA

• Handled 50-60 calls a day, assisting clients with a wide variety of printer and sound card issues.

1994 » 1995

Junior Technician - Head Technician

Hacker Shack Computers, Woodbridge, VA

• Supervised a staff of 6 junior technicians, repairing and upgrading 5-10 PCs a day.


• Designed and implemented Novell and Windows for Workgroups LANs using a variety of physical link layers.

2002 » Present

Webmaster

Evtech.org

2004 » Present

Webmaster

RadioAlchymy, Los Angeles, CA

1992 » 1993

Volunteer

Appalachia Service Project, West Virginia