Ryan Gumbs Email & Phone Number

Silver Spring, Maryland, United States

Real-time, multi-threaded systems, UI development. Production Support, bug-fixes and enhancements for ground-based telemetry recorders for commercial/military.

Supporting the Disney+ Streaming Services media cross-platform ADK framework for embedded Linux devices.

Baltimore County, Maryland, United States

Real-time, multi-threaded, system / kernel / application-level software development. Production Support, bug-fixes and enhancements for cross-platform anti-virus/malware products. Supporting Windows, OSX, Linux platforms. • TDR Host Ransomware Prevention software • C++, Objective-C++, Poco library framework, Qt gui development • mplemented unit testing and test tools with GoogleTest, Python, shell-scripting • Maintain continuous integration builds with Jenkins • Wix installer toolset msi packaging • Windows, OSX, Linux platform development ◦ anti-virus integration

Baltimore, Maryland Area

FIRST DATA CORP, Hunt Valley, MD Software Engineer 2014 • Development, Production Support, bug-fixes and enhancements for primary real-time credit/debit processing system handling 60% of payment business. Real-time processing, high availability, continuous delivery. • Usability enhancements for main control interface, using curses library • Harden communications interface between major credit associations, to prevent crashes. • Provide training for new employees and interns. • Customer support and maintenance for point-of-sale terminal specs: ISO-8583, EDC, UMF • Compliance updates for associations (Visa, Mastercard, Amex, Discover) • tcp/ip, curl, NETX, ZeroMQ, libuv, REST, Python • Platform Upgrade, Upgrade primary credit processing system from AIX5 to AIX7. • Ported C/C++ code from xlc to gcc. NETX7 to NETX11 communications library. • Fixed errors and removed thousands of compiler warnings for card processing and network load-balance programs. • Convert makefile build scripts to cmake. • EMV chip-and-pin support, Compliance with Durbin Amendment to provide EMV support in U.S by 2015. • Add support for international Global/Common-AID standards for chip-and-pin processing for credit/debit cards. • Update technical specs • Projects, • Added Balance and Refunds functionality for merchant-specific private-label cards. • Bank and merchant onboarding: credit+debit-card processing for Scotia Bank. • Source control migration from Dimensions/Harvest to git and Jira/Bitbucket and implemented team-training. • Introduced continuous integration and automated regression testing with Jenkins.Reduced regression team man-hours and improved regression testing performance. • Improved sysem throughput with multi-process parsing of merchant / association specs.

EXELON / CONSTELLATION ENERGY, Baltimore, MDIT Analyst 2007 – 2013Provided necessary support to various assigned projects, including on-call services, debugging nightly processing batches, and design / build / deploy tasks. • Financial Planning and Accounting Data Warehouse. Supported Oracle warehouse, building ETL interfaces and processing business logic, thereby supporting reporting for financial analysts. • SAP Business Planning and Consolidation 7.x. Provided enterprise application support for 5 production instances of this business analytics and reporting tool, supporting 1000 users. Designed, built, tested, and deployed packages, automating user tasks, ETL, and business processes. • Administered server, troubleshooting issues with SQLServer 2008 and Analysis Services. • Coordinated system and performance testing for virtual instances for product upgrades and server consolidations.Software Engineer 2007 – 2013 • COG Enterprise Reporting Tool. Supported in-house enterprise-reporting tool built on C#, using DevExpress, Infragistics 3rd-party tools, creating built custom reports using XML-based report definition and SQL/Oracle stored procedures and Excel import/export functionality. Designed / maintained custom WinForms interfaces and reporting screens for entering, reporting, and approving trades, budgets, and forecasts. • Development. Built custom .NET tool for user-initiated or scheduled nightly restart of COM+ services to work-around memory leaks in BPC enterprise app, significantly reducing server stability issues. • Built Forecasting process in BPC for Business Analysts for forecasting power-consumption and customer turnover for mid-large energy customers. • Upgraded multiple BPC instances from Outlooksoft 4,5 to 7.x through BPC server installation, DTS package conversion to SSIS packages, and system testing.