Kurt Gehlen
San Diego,CA
Overview
32
32
years of professional experience
Work History
Principal Software Engineer
Kioxia America
2020.09 - 2024.01
- Developed a reference implementation for a new NVME command set, which included a library, Linux driver, and fio plugin.
- Made modifications to the Linux kernel io_uring code to support asynchronous ioctl type commands to the driver.
- Used the reference implementation as both a test bed for the hardware implementing the new NVME command set, and to provide feedback on the command set to the hardware team.
Senior Staff Software Engineer
Samsung
2014.11 - 2020.09
- Developed a flash based caching solution for ESXi based on VmWare's VMIOF framework.
- Wrote a simulator in C++ to speed development and enhance testing of the caching plugin by simulating both the virtual machine and the virtual disk in an ESXi system.
- Developed a Linux device mapper plugin and Windows filter driver that performed deduplication and compression to effectively enhance the storage capacity of flash devices.
- Architected and developed a scalable clustered object store which included data distribution and redundancy using key-value flash devices.
Senior Software Engineer
Proximal Data
2011.12 - 2014.10
- Developed a flash based Virtual Machine storage caching system for ESXi and HyperV.
- Developed a Windows file system minifilter driver that acted as the front end to the caching solution.
- Wrote ESXi hostprofile and esxcli plugins in Python.
- Obtained certification for a Windows file system filter and PNP Device Drivers.
Lead Software Engineer
Logic Innovations
2000.03 - 2011.12
- Systems Engineer/Software Lead Engineer for a Linux based IP Encapsulator/IP to ASI router.
- Wrote a Linux network driver for the IP Encapsulator ASI output.
- Project Manager/Software Lead Engineer for MPEG transport stream multiplexer product line.
- Wrote C++ components for MPEG packet processing and section re-assembly, collision resolution for MPEG identifiers, system configuration management, and license management.
- Developed a web interface for the multiplexer.
- Wrote MPEG-2 utilities including a video parser and a prototype stream splicer.
- Wrote an object oriented class library in C++ to abstract operating system functions and implement recurring software patterns.
- Brought up PowerPC 440 and PowerPC 860 based boards using an emulator and reference design.
- Wrote programming routines for Xilinx FPGA.
Software Engineer
Cayenta.com
1999.01 - 2000.01
- Worked with Sempra Energy to move its HR and payment systems from an older mainframe application to an SAP system.
- Wrote software in Java to analyze and convert data records from COBOL based format into new format required for use in SAP system.
- Used CORBA for reporting failures to central server.
- Managed a SUN High Availability cluster.
Software Engineer
Tiernan Communications
1998.01 - 1999.01
- Worked on a Windows based network management system for Tiernan MPEG-2 encoders and decoders using Microsoft Foundation Classes and Visual Studio.
- Wrote device drivers and control software in C for a Nucleus RTX based MPEG-2 encoder card.
- Migrated encoder software to C++ and VxWorks.
- Architected and implemented C++ software for modular MPEG-2 encoder product, including device drivers, system configuration, and monitoring and reporting components.
Software Engineer
Tenth Mountain Systems
1997.01 - 1998.01
- Developed C++ software for compliance testing suite with Secure Electronic Payments (SET) electronic commerce protocol developed by Visa and MasterCard.
- Wrote ASN.1 Distinguished Encoding Rules parser in Perl, and RSA and DES decryption software utilities to analyze protocol messages.
- Worked with SET and digital certificate toolkit to implement hundreds of test cases.
Staff Data Platform Software Engineer
ServiceNow
2024.10 - Current
- Improved performance of Postgres database by adding features to the planner such as additional rewrites and query modifications
- Implemented table pre-extension to the database to reduce lock contention on the extension of tables
- Diagnosed and resolved customer issues involving slow queries and other bottlenecks
Software Engineer
SAIC
1995.01 - 1997.01
- Worked on network security assessment tool for Department of Defense contract.
- Researched and integrated existing exploitation tools into the assessment tool.
- Created new tools in C, Bourne shell and Perl to implement known exploits.
- Collected results of tools using Perl scripts and reported them to central database.
- Worked as member of a team performing analysis on secure electronic commerce protocol developed by Microsoft and Visa (Secure Transactions Technology).
- Wrote software to facilitate interoperability testing between vendor implementations of the STT protocol.
Intern
Oak Ridge National Laboratory
1994.01 - 1994.01
- Worked with Fortran code using the Monte Carlo method to simulate radiological dose to organs from internal sources in pregnant women.
- Wrote software in C to analyze and display results of Monte Carlo simulation code.
Education
MS - Radiological Health Physics
San Diego State University
1994-01
BS - Physics, BA History
University of California, San Diego
1991-01
Skills
- Programming in several languages, including C, C, Java, Perl, Python, PHP, Unix Shell Scripts, HTML, JavaScript and Assembly
- Programming for various operating systems, including VxWorks, Linux and Windows
- Software architecture including object oriented design
- Embedded programming including Linux device drivers and board bring up
- Experience in TCP/IP networking, sockets programming, IP routing and the Linux stack
- Knowledge of MPEG-2 and H264 video systems
- Virtualization on VmWare, HyperV and RedHat Enterprise Linux
- Familiarity with revision control and build systems including Git and Jenkins
- Knowledge of Postgresql, SQL, and database internals
- Experience with product lifecycle management
Timeline
Staff Data Platform Software Engineer
ServiceNow
2024.10 - Current
Principal Software Engineer
Kioxia America
2020.09 - 2024.01
Senior Staff Software Engineer
Samsung
2014.11 - 2020.09
Senior Software Engineer
Proximal Data
2011.12 - 2014.10
Lead Software Engineer
Logic Innovations
2000.03 - 2011.12
Software Engineer
Cayenta.com
1999.01 - 2000.01
Software Engineer
Tiernan Communications
1998.01 - 1999.01
Software Engineer
Tenth Mountain Systems
1997.01 - 1998.01
Software Engineer
SAIC
1995.01 - 1997.01
Intern
Oak Ridge National Laboratory
1994.01 - 1994.01
MS - Radiological Health Physics
San Diego State University
BS - Physics, BA History
University of California, San Diego