Jeff Jeffries

Denton and the DFW metroplex, Texas
(214) 538-4994
Objective     Summary     Computer Skills     Work Experience     Education



Computer Skills


Development Techniques

  • Object Oriented Design Patterns (abstract factory, adapter, bridge, others)
  • IPC/multi-process applications (shared memory, message queues, semaphores/critical sections)
  • Multi-threaded applications (boost threads, pthreads, Microsoft threads)
  • Embedded system development, real time system development (RTOS)
  • Client/Server applications over TCP/IP
  • Fault tolerance (exception handling, active-active and active-passive double/triple redundancy, fail over, replication, clusters)
  • Source Control (git and gitflow, subversion, CVS, SourceSafe)
  • Agile/Continuous integration via automation of tests (unittest, doctest), builds, documentation generation (doxygen) and deployments (puppet, chef, jenkins, hiera)



  • C++ and STL (UNIX, Windows)
  • C (UNIX, Windows)
  • SQL (Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Microsoft Access, PL/SQL)
  • python (UNIX, Windows)
  • Shell Scripting (sh [aka Bourne], bash, ash, sed, awk)
  • PHP and HTML (UNIX, Windows)
  • JavaScript, CSS


Operating Systems

  • CentOS Linux (Intel x86)
  • Ubuntu Linux (Intel x86)
  • Raspberry Pi OS
  • OpenWRT Linux
  • opeNSLUg Linux (an embedded Linux for Intel IXP420)
  • Apple OSX (Intel x86)
  • Gentoo Linux (Intel x86)
  • Microsoft Windows 7, Vista, XP, 2000, NT v4.0, EmbeddedNT, 98, 95 (Intel x86)



  • Networking/LAN/WAN: IP, TCP, UDP, DNS, DNSSEC, DHCP, BOOTP, PXE, TFTP, ARP, multicast
  • Routing: NAT, NAT-T, BGP, RIP, VPN
  • Web: HTTP, HTTPS, ETag, Cookies
  • Telecom: H323, SIP, MGCP, SS7, ISDN
  • Security/Encryption: Diffie-Hellman, SHA, AES, IPSec, PKI, PGP/GPG, TLS, SSL, SSH, LUKS

Work Experience

  Auth0 Remote, Headquartered in Bellevue, Washington
  2018 - Present
Managed Services Engineer. Partnering with customers and team members to provide ever increasing levels of service quality for cloud based authorization and authentication services. Facilitating horizontal and vertical scale through identification and resolution of bottlenecks, using agile and continuous integration/delivery methods and automating manual processes to increase both accuracy and consistency of service delivery.

  Dynatrace Remote, Headquartered in Waltham, Massachusetts
  2015 - 2018
Software Engineer - Tools and Automation. Used agile development methods and introduced Twelve-Factor App methods to design and write libraries, web services and applications that reduced operating costs, eliminated manual data entry errors and increased infrastructure availability and uptime by identifying failures globally, programmatically performing automated remediation actions in an attempt to resolve the failure condition and providing notification on remediation failures by managing Jira issues (creation, modification/comments and closure). Automation actions and effectiveness were measured and trended via dashboards (both custom and Splunk-based dashboards).

  Keynote Systems, Inc. (now a service offering of Dynatrace) Plano, Texas
  2012 - 2014
Senior Technical Support Analyst - Tier II and Mobile. Diagnose and troubleshoot End to End performance and availability of websites for mobile devices. Technologies include WebKit (iOS and Android), DOM, xPath, SMS, JSON, DHTML, HTML5.

  Keynote Systems, Inc. (now a service offering of Dynatrace) Plano, Texas
  2003 - 2007
Technical Support Specialist. Used various tools to analyze and diagnose End to End Internet performance of Fortune 1000 websites. Accomplishments include:
  • identified, documented and provided workarounds or bug fixes for nearly all service offerings
  • served as technical lead in identifying and providing resolutions for customer problems
  • worked with other members of the support team to reduce the mean time to resolution (MTTR) of service requests and increase customer satisfaction via email and telephone
  • proposed new processes and modified existing processes to eliminate inefficiencies
  • assisted the sales force as a technical adviser in all facets of the sales cycle
  • created an internal Support Portal and nearly all documentation within it (in use both by the support team and others outside of the support team)

  Omnibus Point of Sale, Inc. Denton, Texas
  2002 - Present
Founder. Providing tax compliance services to bars and restaurants.

  T&S Software Associates, Inc. Richardson, Texas
  2000 - 2002
Member of Technical Staff. Wrote enhanced service computer telephony applications for the Zeus Voice Foundation call control engine using C++. Projects included:
  • developed CTI (computer telephony integration) support for the Bicom Electra Pro "In-Skin" telephony board on the ContactCenter platform of the NEC Electra Elite IPK telephony system. Played the principal role in the development, testing, manufacturing and integration phases of the project. Applications included Auto Attendant, IVR, Voicemail, ACD, and external CRM interface on Embedded NT 4.0
  • led team of three others for testing and deployment efforts of T.38 and T.37 VoIP fax trial for Cisco Systems with VB/ASP configuration front end
  • developed Linux installation procedures and associated documentation
  • designed and prototyped IMAP4 and POP3 unified communications interface libraries
  • unit, component and system tested the API interoperability and calling card services for the Taqua Open Compact Xchange (OCX™) class 5 switch against the Zeus telephony platform
  • provided configuration and testing services to Lucent Technologies OPENet Solutions Group for redundant hosts and redundant nodes on the EXS class 4 switch
  • wrote the Application Programmer's Guide and enhanced 700+ page Programmer's API Guide for the Lucent Technologies OPENet Solutions EXS class 4 switch
  • enhanced Front End and Back End VB API manuals for the S1 Banking System (formerly a Regency Voice Systems product)

  Internet Resources Group - (now a service offering of Keynote by Dynatrace) Plano, Texas
  1999 - 2000
Linux Administrator and Programmer. Maintained 24 hour availability of networks, systems and applications and verified accuracy and completeness of network procedures and system procedures.

  Missing Link Media, Inc. Plano, Texas
  1998 - 1999
Software Engineer. Designed, developed and integrated SQL databases with websites using PHP, ASP, VB, C and C++. Projects included:
  • wrote ASP and ISAPI DLLs in VB, C++ and ADO for financial analysis of hedge funds totaling more than 10 billion dollars in assets
  • wrote SRD for automation of
  • designed and automated
  • designed and prototyped a web-based shopping cart using MySQL
  • designed and prototyped a real estate client/server application with a Win32 Windows client and a back end UNIX MySQL database

  University of North Texas Computer Science Department Denton, Texas
  1997 - 1998
UNIX Systems Administrator. Automated manual tasks, increased both environment reliability and environment capabilities and also implemented disaster recovery processes via:
  • creation and maintenance of operating system scripts and system documentation
  • management of 1200+ users (faculty, staff and students) and 60+ systems (servers and workstations)
  • managed department web server migration (Netscape on Solaris to Apache on FreeBSD)
  • NIS, AMD and NFS configuration
  • automated daily remote backups using Amanda


  University of North Texas Denton, Texas
  May 2000
Bachelors of Science Degree in Computer Science with minors in Technical Writing and Mathematics and emphasis in Economics and Business Computer Information Systems