Sayantan Bhattacharya

Experience

• 

  Cognizant Technology Solutions

  Jun 2003 - Jul 2004

  Programmer Analyst

  Designed, implemented and optimized Oracle based data base management solution (RDBMS) for C# web application.

• 

  Qualcomm

  May 2006 - Dec 2006

  Hardware Intern

  Implemented and tested Verilog-RTL block level design using VERA, ModelSim and other in-house RTL verification tools.

• 

  Broadcom Inc.

  May 2007 - now

  Design, implement, debug and maintain firmware for SAS, SATA, NVMe based raid storage controllers. - Designed and demonstrated proof of concept of various key features on FPGA platform for Broadcom's next generation SAS/SATA/NVMe storage controllers.- Designed and implemented NVMe enumeration methodology and PCIe Configuration TLP redirection for Broadcom's next generation storage solution.- Maintain, support and enhance SCSI Enclosure Services (SES) for Broadcom's 3rd generation storage controller as per industry standard SES-3 protocol. Show less Senior Firmware Engineer (2010 - 2014)- Designed and demonstrated a firmware method that a SAS controller can use to abstract access from virtual machines operating on a host system to SAS physical devices connected to the SAS controller without a routing table for port-to-port messaging on the SAS controller. ( US Patent No. 20130283264 )- Designed and enhanced a single core SSP Target solution to a multi-core solution with coherency in firmware for LSI's 3rd Generation SAS/SATA Storage controllers.- Supported and enhanced key features in firmware involving I/O error handling and SCSI Task Management, SAS Discovery for LSI's 3rd geenration SAS/SATA storage controllers. Firmware Engineer II (2007 - 2010)- Debugged and supported key features in firmware written in C/C++ PowerPC assembly for LSI's first generation storage controllers.- Implemented features like SATA NCQ support, etc per customer request and in accordance with published SCSI, SAS and SATA protocol specifications. - Helped customers meet deadlines and major business objectives by debugging and root causing critical storage controller firmware issues using PowerPC JTAG hardware debuggers, SAS/SATA protocol analyzers. - Collaborated with other departments within the organization to scope out and implement solutions for problems in unfamiliar system components. Show less

  • Principal Firmware Engineer

    Dec 2018 - now

  • Staff Firmware Engineer

    Jun 2014 - Dec 2018

  • Firmware Engineer

    May 2007 - Jun 2014