Experience

Collabora

• United Kingdom
• Software Development
• 100 - 200 Employee

• Senior Engineer

  • Jan 2023 - Present

  Developing bootloaders for Rockchip SoC, U-boot, for rk3588 ARMv8 device. Bring-up for Rockchip RK3588 and RADXA Rock-5A and Rock-5B board in U-boot (basic board, USB host, pinctrl, PCI express, USB gadget, USB 3.0 host, networking, DFU). Developing Linux Kernel drivers for MediaTek SoCs for Chromebooks. Developing bootloaders for Rockchip SoC, U-boot, for rk3588 ARMv8 device. Bring-up for Rockchip RK3588 and RADXA Rock-5A and Rock-5B board in U-boot (basic board, USB host, pinctrl, PCI express, USB gadget, USB 3.0 host, networking, DFU). Developing Linux Kernel drivers for MediaTek SoCs for Chromebooks.



Microchip Technology Inc.

• United States
• Semiconductor Manufacturing
• 700 & Above Employee

• Senior Engineer

  • Mar 2017 - Jan 2023

  Developing Linux kernel device drivers, stage 2 and stage 3 bootloaders, board bring-up, for Microchip SAM SoC series 32-bit MPUs (ARM AT91 Architecture) and Evaluation/Engineering boards, and FPGA prototyping for design in progress device IPs and SoCs. Project public website: http://www.linux4sam.org During 2020 , project lead for Linux bring-up of SAMA7G5 MPU. Developing/Maintainer for following kernel drivers iio: adc: at91-sama5d2_adc input: touchscreen: resistive_adc_touch media: atmel: atmel-isc media: atmel: atmel-isi watchdog: sama5d4_wdt ARM: at91: sam5d27_wlsom1_ek i2c: at91: Bring-up for sama7g5 Evaluation Kit . Bring-up for sama5d2_icp (Industrial Connectivity Board) . Developing ARMv7 Cortex A5 bare-metal applications. Member of the at91 Linux4SAM organization https://github.com/linux4sam/ Maintainer of the at91bootstrap project : https://github.com/linux4sam/at91bootstrap Maintainer of the u-boot-at91 project : https://github.com/linux4sam/u-boot-at91 U-boot custodian for u-boot-at91 tree. Maintainer of the buildroot-external-microchip project: https://github.com/linux4sam/buildroot-external-microchip Technologies : Analog to Digital Converters (ADC), Touchscreens, SD-Card, eMMC, Camera sensors, parallel sensor interface, MIPI CSI-2 (Camera serial interface), Synopsys CSI2HOST, Synopsys DRAM controller UMCTL2, 1Wire bus and 1Wire EEPROMs , DMA controller, IRQ-controller, i2c bus, clock tree subsystem, Device Tree, Controller Area Network (CAN), DRAM AT91 controller, DDR3 memory, FPGA prototyping, ARM GIC, ARM AXI4, ARM CortexA5, ARM CortexA7, ARM926EJ, ARM TrustZone controller. Linux Kernel All-time contributions: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?qt=grep&q=hristev U-boot All-time contributions: https://github.com/u-boot/u-boot/commits?author=ehristev AT91Bootstrap All-time contributions: https://github.com/linux4sam/at91bootstrap/commits?author=ehristev Show less



Mentor Graphics

• United States
• Software Development
• 700 & Above Employee

• Senior Engineer

  • Apr 2016 - Feb 2017

  I worked on optimizing, testing, patching, integrating, developing Linux Kernel port for Renesas Rcar family of SoC, Generation 2 and Generation 3. Worked with specific vendor drivers including : DRM/KMS, display unit, SDHI/MMC, CAN, USB, SATA, I2C. I worked on optimizing, testing, patching, integrating, developing Linux Kernel port for Renesas Rcar family of SoC, Generation 2 and Generation 3. Worked with specific vendor drivers including : DRM/KMS, display unit, SDHI/MMC, CAN, USB, SATA, I2C.



Luxoft

• Switzerland
• IT Services and IT Consulting
• 700 & Above Employee

• Software engineer

  • Jul 2010 - Apr 2016

  I worked on the firmware for the layer 3 switches Lenovo RackSwitch and Lenovo BladeCenter. These switches were part of Blade Network Technologies ( BNT) which was acquired by IBM Corporation in 2010 and Lenovo Group Ltd. in 2014. My responsibilities included sustaining, developing, and porting of various features for a number of hardware switch platforms. In 2010 I worked as engineer on new platform bring up , BNT Rackswitch G8264. Between 2011 and 2012 I was leading implementation of Precision Time Protocol (IEEE 1588) on RS G8264 based on BCM 56840 chipset. Between 2013 and 2014 I was leading implementation of Network Address Translation on RS G8332 based on BCM 56850 chipset. From 2014 to 2016 I developed and sustained AAA&Tacacs+ feature suite which include linux pam, nsswitch, Tacacs+ protocol, Virtual Routing Forwarding instance for AAA Show less



Alvarion Technologies

• Wireless Services
• 100 - 200 Employee

• Junior Engineer

  • Jul 2009 - Sep 2009

  I worked in the NPU SW team, which is developing a base station type device in the WiMAX network. NPU ( Network processing unit ) has router functions but also communicates signals to the ODU ( WiMAX antenna Outdoor Unit ). I worked in bug fixing, code correction, testing on lab equipment but also in real applications I worked in the NPU SW team, which is developing a base station type device in the WiMAX network. NPU ( Network processing unit ) has router functions but also communicates signals to the ODU ( WiMAX antenna Outdoor Unit ). I worked in bug fixing, code correction, testing on lab equipment but also in real applications



University POLITEHNICA of Bucharest

• Romania
• Higher Education
• 700 & Above Employee

• Associated assistant

  • Feb 2009 - Jul 2009

  I managed the Data Structures and Algorithms laboratory, at the Faculty of Engineering in Foreign Languages. The lab assumed proposing problems and exercises, working with students, proposing and correcting homeworks, student evaluation. The lab was managed in English. I managed the Data Structures and Algorithms laboratory, at the Faculty of Engineering in Foreign Languages. The lab assumed proposing problems and exercises, working with students, proposing and correcting homeworks, student evaluation. The lab was managed in English.