Mirela Grujic - System Software Engineer at NextSilicon

Mirela Grujic

System Software Engineer at NextSilicon

Belgrade, Central Serbia

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Summary

👤

Senior

🎓

Top School

Mirela Grujic is a systems software engineer with 11 years of experience designing low-level firmware and power management for complex SoCs, currently building system software at NextSilicon from Belgrade. She has a strong track record at Xilinx and AGGIOS developing PMU firmware, runtime power management, and hardware abstraction layers for MPSoCs, and contributed power and clock control improvements to prominent open-source projects like Xilinx embeddedsw and ARM Trusted Firmware. Mirela blends hands-on implementation (MicroBlaze, Cortex-A/R, EEMI/pinctrl, PLL/clock models) with tools and virtual platform work (QEMU/QMP), enabling both silicon bring-up and higher-level platform management. She is also a coauthor of a unified hardware abstraction format and has led cross-functional teams, reflecting both technical depth and leadership in energy-aware system design. An interesting detail: her contributions include enabling fine-grained programmable-logic power domains and coordinating PLL relationships—work that directly impacts real-world power sequencing and reliability.

11 years of coding experience

10 years of employment as a software developer

Undergraduate Studies, Electronics, Undergraduate Studies, Electronics at University of Belgrade, School of Electrical Engineering

Github Skills (15)

c1710

firmware10

embedded10

clock10

time-management10

xmp10

c-programming10

c1110

zynqmp10

sys10

power-management10

hal9

system-programming9

abstraction-layer9

system9

Programming languages (2)

CHTML

Github contributions (5)

Xilinx/embeddedsw

Mar 2015 - Sep 2018

Xilinx Embedded Software (embeddedsw) Development

Role in this project:

Back-end Developer

Contributions:468 commits in 3 years 7 months

Contributions summary:Mirela primarily worked on power management code for an embedded system, specifically within the Xilinx Embedded Software (embeddedsw) repository. Their contributions focused on improving the Power Management Framework (PMUFW), including implementing system shutdown features, restructuring the handling of master and slave requirements, and adding support for new slave nodes such as a DDR and the Programmable Logic power domain. The code changes included implementing clock control via EEMI, which involved managing and coordinating with the PLLs' and their relationships with the node.

xilinxembedded-softwareembedded

ARM-software/arm-trusted-firmware

Jun 2016 - Nov 2020

Read-only mirror of Trusted Firmware-A

Role in this project:

Embedded Systems Engineer / IoT Developer

Contributions:8 commits in 4 years 6 months

Contributions summary:Mirela primarily contributed to the power management (PM) service within the Trusted Firmware-A repository, specifically targeting the Xilinx ZynqMP platform. Their work involved defining and manipulating clock models and IDs, adding and removing node definitions for various IPI devices, and implementing/reimplementing EEMI APIs for pinctrl functionality. These changes reflect contributions to the low-level system firmware and related power control mechanisms. The user also addressed clock-related issues, ensuring correct clock model operation, and handled errors related to clock gate permissions.

trustedread-onlyfirmwareembedded

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