Djordje Zivanovic

Building the software infrastructure for new CPU core technology for HPC and data centers:

• Implemented gdb self-hosted (native) debugger for RISC-V using Zephyr gdbstub feature
• Developed page table management for RISC-V MMU in Zephyr OS
• Software validation of other sub-systems
• (C/C++, Python, RISC V, MMU, Virtual Memory, GDB)

Delivered solutions for a custom 5G O-RAN Linux platform:

• Handled processes to transition the custom platform from SysV to Systemd system initialization
• Deployed the solution on a new Linux kernel version with its related packages and applications to optimize the transition process
• (Linux, Yocto, Shell Scripting)

Developed device software components for next-gen satellite communication SoC on Project Kuiper:

• Contributed solutions for a simulator for a gateway transmitter, developed a packet generator using design specs, and tested the modulator and demodulator with changing MCS modes at run-time
• Developed Rust firmware and built Petalinux custom images
• (C/C++, Rust, Python, Embedded Systems, Shell Scripting)

Developed, maintained, customized, and improved modular and scalable embedded systems components:

• Created prototypes to demonstrate technology capabilities
• Developed Quectel TCP AT commands stack using Linux TCP stack
• Unit tests and software verification and validation
• (C/C++, Linux, Embedded Systems, 3G/4G, Bluetooth)

Development of the application server responsible for event propagation, logging, and interaction with the underlying database:

• Introduced a Common Database Interface layer on the server code (DBI) with support for different RDBMS
• Improved server response times through in-memory data caching and delivered solutions to monitor ADS performance
• (C++ 11, ODBC, SQL, MariaDB, RDBMS)

• Designed and implemented C/C++ code on embedded Linux applications in different networking devices
• Implemented technical features and troubleshot embedded software solutions related to networking
• Worked on designing, implementing, and testing a new VPN tunnel feature
• (C/C++, OpenWrt, Shell scripting, Lua, JavaScript, Embedded Systems)

• Analyzed open-source eye-tracking solutions, enhanced Opengazer solution, and delivered new firmware on the project
• Created a solution in lab conditions with decent accuracy with limited head movements
• (C/C++, OpenCV, VHDL, Linux drivers, Embedded Systems)
• ARM-based Linux firmware development for custom hardware platform
• Developed acquisition of sensor data between host PC and ARM-FPGA board using TCP/IP communication
• FPGA design for parallel interface communication between Xilinx FPGA chip and ARM processor
• Developed Linux DMA driver using Xilinx Video DMA Engine driver reference
• (C, Linux kernel, drivers, networking, VHDL)
• Designed and implemented solutions for embedded wearable devices with GPS, accelerometry-based physical activity monitoring, and fall detection for users
• Deployed algorithms to enhance the wearable device's fall detection, physical activity monitoring, and location tracking metrics
• (C, Matlab, real-time software, Embedded Systems, STM32)