Robert Grunkemeyer Email & Phone Number

Greater Atlanta Area

Developed Performance Tracking C# API for legacy client applications to measure duration of methods calls greater than 1 second response time. Prototyped solution to replace MSMQ queuing with TIBCO or RabbitMQ allowing legacy code updates with 0 coding changes. MSMQ is obsolete with .NET Core. Created a C++ ODBC connection pooling solution to scale to 10000 concurrent users from a previous cap of 5000. Researched Microservices, Oauth2, OpenID, Cosmos DB, Kafka, RabbitMQ, Tibco… Show more Developed Performance Tracking C# API for legacy client applications to measure duration of methods calls greater than 1 second response time. Prototyped solution to replace MSMQ queuing with TIBCO or RabbitMQ allowing legacy code updates with 0 coding changes. MSMQ is obsolete with .NET Core. Created a C++ ODBC connection pooling solution to scale to 10000 concurrent users from a previous cap of 5000. Researched Microservices, Oauth2, OpenID, Cosmos DB, Kafka, RabbitMQ, Tibco, Angular and TypeScript for potential future solution architecture. Show less

Alpharetta, Georgia, United States

Implemented WCF web service to receive compressed encrypted files containing thousands of transactions. Background threads were spawned to insert transactions into a database table. Maintained disconnected client WinForms application responsible for gathering data for 6 months before a data synchronization of 20000 transactions processed in under 1 minute. Recognized for excellence in communication and problem solving while mentoring 2 new developers and 2 QA resources. The project… Show more Implemented WCF web service to receive compressed encrypted files containing thousands of transactions. Background threads were spawned to insert transactions into a database table. Maintained disconnected client WinForms application responsible for gathering data for 6 months before a data synchronization of 20000 transactions processed in under 1 minute. Recognized for excellence in communication and problem solving while mentoring 2 new developers and 2 QA resources. The project also included an ASP .NET MVC administration web site which relied on REST api to transmit the data using .NET core. Show less

Alpharetta, Georgia, United States

Generated thousands of performance load tests to exercise SQL stored procedures with random valid data input. Simulated system under various stress loads. Identified and reported hundreds of critical performance defects. Performed analysis to provide root cause and resolution. Improved screen response time from 10-15 seconds to sub second average response time. Established reports for bench marking actual performance under 4 distinct user loads. Constructed 7 diagnostic tools… Show more Generated thousands of performance load tests to exercise SQL stored procedures with random valid data input. Simulated system under various stress loads. Identified and reported hundreds of critical performance defects. Performed analysis to provide root cause and resolution. Improved screen response time from 10-15 seconds to sub second average response time. Established reports for bench marking actual performance under 4 distinct user loads. Constructed 7 diagnostic tools measuring real time user activity for troubleshooting and monitoring. Advised 8-member offshore performance team how to design, instrument and report test results. Show less

Alpharetta, Georgia, United States

Implemented Active Directory Security Services with LDAP integration to process logons for thousands of concurrent users with sub second response time. Directed daily stand up and code review for offshore 3-member development team.

Atlanta Georgia

NonStop Solutions is a provider of supply chain software applications that optimize the flow of finished goods for manufacturers, and inventory replenishment software. Customers have millions of part numbers in their product databases. Lead technical developer/architect for analysis, design and implementation of an Object Oriented NT product redesign for inventory replenishment and forecasting system. Use of SQL server C# .net and C++ programming languages. The company was sold in June of… Show more NonStop Solutions is a provider of supply chain software applications that optimize the flow of finished goods for manufacturers, and inventory replenishment software. Customers have millions of part numbers in their product databases. Lead technical developer/architect for analysis, design and implementation of an Object Oriented NT product redesign for inventory replenishment and forecasting system. Use of SQL server C# .net and C++ programming languages. The company was sold in June of 2001 and the development activities were assumed by the new company in San Francisco. Show less

IMNET provided healthcare integration software. Developed solutions that allowed seamless communication and integration between different healthcare vendor’s applications using COM based technologies. The solutions were written in Visual C++ MFC, Delphi 3.0 and Visual Basic 5.0.The solutions were developed to allow 16 to 32 bit access, and could run under NT 4.0 or Win95. Allowed IMNET to integrate with 4 different business partners.

Dayton Metropolitan Area

NCR provides Point of Sale terminals and services that address the needs of retail, financial, travel, hospitality, gaming, public sector, telecom carrier and equipment organizations in more than 100 countries. Development internal applications using Object Oriented architecture with Visual C++. Hardware configuration rules engine, Sales Proposal Creation, Developers Workbench.