Kristopher Johnson

Development tasks include reverse-engineering of undocumented protocols, file formats, and operating system libraries, and maintaining compatibility with older versions of iOS and Android. Learned about internals of iOS, Android, and WebKit. Implemented components and test applications for iOS, Android, Windows, and macOS. Integrated components into tests with Appium, Xcode's testing frameworks, and HP UFT. Used IDA Pro and Hopper disassemblers and Wireshark protocol analyzer for reverse engineering.

Accepted interim Team Lead role January-August 2019 while company searched for a new Director of Software Development. As Team Lead, prioritized and assigned development tasks to team members, managed technical-support escalations and assisted customers directly when needed, worked with sales and marketing departments, and was responsible for deliverables and releases. Used JIRA for internal issue management and ZenDesk for coordination with support team and customers. Interviewed candidates for Director role.

Design and implementation of mobile applications for iOS and Android for traffic engineers, ITS maintenance staff, and for the general public, using Apple Maps, Google Maps, and ESRI ArcGIS map APIs, distributed via the App Store, Google Play, and internal enterprise servers. Tools used include Xcode, Objective-C, Swift, Eclipse, Android Studio, and Java.

Front-end and back-end design and implementation of web sites using Node.js, AngularJS, OpenLayers, jQuery, Backbone.js.

Participating in requirements gathering, design, and implementation of a JBoss-based application that supports the Gaming Standards Association’s G2S and S2S protocols for managing gaming machines.

Added support for multiple gaming machine protocols for Scientific Games video gaming site controllers. Site controller software was mix of C and C++, running on Fedora Linux. Site controller software communicated with gaming machines using RS-422-based serial communications, and with remote host using TCP/IP.

Developed cross-platform (Win32 and Linux) C++ libraries for internal use at Scientific Games. Tools used included Visual Studio 2005 and gcc/g++ compilers, Visual SourceSafe, CVS, Python, SCons, CMake.

Designed and implemented system for downloading and installing new software releases from Windows servers to remote Linux-based terminals. Tools used included Python, Visual C#, Microsoft SQL Server 2005, rsync, Cygwin.

Gathered requirements and initiated design and development of new generation of network infrastructure and management software at Scientific Games. Involved TCP/IP and serial communications with a variety of vendor-specific protocols.

Developed JacksOrBetter video poker game for iPhone OS using Cocoa Touch/UIKit and Objective-C, for distribution via Apple’s App Store. Also developed web-application variant of JacksOrBetter, using HTML, CSS, JavaScript, jQuery, and WebKit.

Developed open-source Menubar Countdown application for Mac OS X, using Objective-C and Apple Xcode IDE.

Assisted internal development team at Reuters in resolving issues for a major software release. Added necessary features, diagnosed and resolved defects, and tested new functionality. Tools used included Visual C++ 6.0, ATL, MFC, ActiveX controls, Subversion, VMWare, Windows crash dump analysis.

Lead developer of UDOT Traffic application, a public traveler information app for iOS and Android promoted by the Utah Department of Transportation.

Design and implementation of mobile applications for iOS and Android designed for traffic engineers, ITS maintenance staff, and for the general public.

Network communications with remote sensor equipment and recording of data to central databases, using C#/.NET and native C++/Win32 applications and components.

Maintenance of ActiveX-control-based legacy applications using C++, MFC, ATL, and .NET

Design and development lead for lottery terminal product development group.

Served as lead software developer for new product prototypes. Oversaw requirements specification, design, implementation, and deployment.

Developed open-source Remoting.Corba library, using Microsoft Visual C# .NET, which fosters integration between CORBA and .NET Remoting applications by providing an implementation of the GIOP/IIOP protocols.

Developed COM component and ASP page for a Pocket PC handheld, providing remote control of a television set from customer’s web server over a wireless network, using eMbedded Visual C++.

Updated makefiles and created Korn shell scripts for building and deploying Solaris version of web-based banking application with C++/CORBA and Oracle back end.

Assisted with upgrade of Rogue Wave SourcePro library version.

Attended Southern California regional integration forum meetings and advised clients on architecture and other technical matters. Developed proposals for expansion of the above-described system.

Involved in company's participation in CORBA-based transportation industry standards activities (NTCIP).

Designed and implemented a CORBA-based system component for exchanging local traffic system data with regional agencies in southern California.

Played a major role in design and implementation of a DCOM-based system that controls freeway message signs and reacts to adverse weather conditions.

Designed and implemented CORBA-based system for interactive control of remote closed-circuit television cameras from desktop computer, using Visual C++ and TAO. Maintained CORBA-based applications written in C++ using VisiBroker, Orbix, and TAO, for Windows and UNIX (Solaris) operating systems.

Played a major role in company-wide software development process improvement activities. These included reorganization of the company's source code version control system, creation of scripts for automatic builds of software, definition of programming style standards, and documentation of procedures.

Acted as team leader for coordination of development activities between several programmers across the country.

Participated in development of national standard for CORBA-based exchange of traffic flow data between control centers in multiple jurisdictions.

Designed and administered the relational database used by New York City's Vehicular Traffic Control System, using Oracle running on an OpenVMS-based system.

Designed and implemented database server processes and data access components used by traffic management system components running on various operating systems (NT, UNIX, VxWorks, OpenVMS, and OS/2) using the GNU toolset, Microsoft Visual Studio, and other vendors’ development environments.

Designed and implemented several OS/2 applications using IBM's VisualAge C++ development tools and the Versant object-oriented database system. These included an application for centralized monitoring and control of freeway ramp meter controllers for the city of Milwaukee, and an application for the viewing and editing of traffic hazard information for the state of Minnesota.