Tomislav Radanović, Developer in Solin, Croatia
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Tomislav Radanović

Verified Expert  in Engineering

Embedded Systems Developer

Solin, Croatia
Toptal Member Since
February 11, 2020

Tomislav is a skilled professional with eight years of expertise in designing, implementing, documenting, and maintaining complex embedded systems from conception to production. His approach combines deep technical proficiency with a keen focus on optimizing system performance and reliability, delivering solutions that meet stringent requirements. Tomislav excels in technical problem-solving and collaboration, ensuring projects are delivered on time and within budget.


C++, Firmware, C, Embedded C, Embedded C++, Embedded Systems...
Embedded Software, C, Embedded C, ARM Embedded, Nordic nRF52...
C, Embedded C, Real-time Operating System (RTOS), Zephyr, ARM Embedded, ARM...




Preferred Environment

Agile, Git, Slack, Visual Studio Code (VS Code), Linux

The most amazing...

...product I've worked on is a radio interface control system used in 4G (LTE) and 5G (NR) network providers to monitor connections for billions of mobile devices.

Work Experience

Senior Software Engineer

2022 - 2023
  • Wrote early development firmware versions of autonomous delivery devices with three other senior engineers. This version implemented MVP functionality enough for early evaluation board testing.
  • Scaled up autonomous delivery project code infrastructure, onboarded several software engineers, and communicated with product teams to refine project requirements. This resulted in record time-to-market from zero code to production in eight months.
  • Introduced Zephyr real-time operating system (RTOS) to the organization and acted as a go-to person for technical questions. It allowed other teams and projects to use the open source RTOS instead of paid solutions.
  • Wrote several generic Linux and Zephyr RTOS drivers for use in existing and future projects.
  • Rewrote legacy bare-metal applications using modern build and static/dynamic analysis tools. The application was stable, without any functional or safety incidents until its retirement 1.5 years later.
Technologies: C++, Firmware, C, Embedded C, Embedded C++, Embedded Systems, Real-time Embedded Systems, Real-time Operating System (RTOS), Embedded Linux, Embedded Software, Zephyr

Senior Firmware Engineer

2020 - 2022
  • Developed Fjorden Grip firmware and bootloader using Zephyr RTOS.
  • Exposed device functionality over Bluetooth Low Energy (BLE) interface.
  • Implemented secure over-the-air (OTA) device firmware upgrade (DFU) to allow customers to update their firmware.
  • Expanded device battery life to approximately six months on standard coin cell battery by utilizing nRF52 SoC low power features.
Technologies: Embedded Software, C, Embedded C, ARM Embedded, Nordic nRF52, Real-time Operating System (RTOS), Zephyr, Bluetooth Low Energy (LE), Real-time Embedded Systems, Embedded Hardware, Firmware

Senior Firmware Engineer

2020 - 2020
  • Developed and tested nRF52 firmware using Zephyr RTOS in C programming language.
  • Optimized the firmware for low power operation resulting in battery-powered mode to last for approximately eight months of continuous operation.
  • Implemented BLE mesh networking between peer devices, allowing simpler on-site installation with minimal use of data and power cables.
  • Used oscilloscope, logic analyzer, and multimeter to trace and debug board-level issues, thus shortening the time between board iterations.
Technologies: C, Embedded C, Real-time Operating System (RTOS), Zephyr, ARM Embedded, ARM, Raspberry Pi, Nordic nRF52, Embedded Software, Bluetooth Low Energy (LE), Real-time Embedded Systems, Embedded Hardware, Firmware

Embedded Software Engineer

2017 - 2020
  • Collaborated on the development, testing, integration, and delivery of essential features that impacted WCDMA, LTE, and NR networking modes of the radio interface control software.
  • Pioneered multiple product-wide codebase refactoring, improving testability and reducing complexity, which contributed to a 70% drop in bug reports over a period of three months.
  • Designed and implemented a custom containerization engine used for efficient virtualized component testing of critical software modules.
  • Transferred knowledge and experience by performing extensive code reviews.
  • Held multiple department lectures to educate coworkers about best practices.
  • Performed technical screening for hundreds of job candidates.
Technologies: Embedded C, Embedded Software, Embedded Systems, POSIX, Linux, Protocol Buffers, Google Test, GNU Toolchain, Real-time Operating System (RTOS), C++, C, Embedded Linux, AutoTools, Embedded C++, Embedded Controllers, Telecommunications, Firmware

Software Engineer

2016 - 2017
  • Improved deep packet inspection engine capabilities by designing and implementing multiple classification and extraction algorithms.
  • Expanded the organization's internal knowledge base by reverse engineering over 20 application-level network protocols.
  • Performed targeted network traffic interception in a controlled environment.
Technologies: TCP/IP, Linux, AutoTools, C++, C, Reverse Engineering, GNU Toolchain, POSIX

Path Processor
PathProcessor is a lightweight, command-line utility for converting STL files to G-code, tailored for CNC milling machines. It simplifies the process of preparing 3D models for CNC machining by automating the conversion of STL geometry to machine-readable G-code.

Hydrocontest is the first international student competition devoted to maritime energy efficiency. As a lead embedded systems engineer, I was directly involved in both the hardware and software aspects of designing an unmanned racing boat. This project taught me how to work efficiently in a team of experts with backgrounds different from my own.
2017 - 2019

Master's Degree in Computer Science

University of Split - Split, Croatia

2014 - 2017

Bachelor's Degree in Computer Science

University of Split - Split, Croatia

2010 - 2014

Technician's Diploma in Electronic Engineering

Electrical Engineering School in Split - Split, Croatia




Zephyr, CMake, GNU Toolchain, MQTT, AutoTools


Arduino, Bluetooth Low Energy (LE), Linux, Raspberry Pi, Docker, Embedded Linux


Google Test


Embedded C++, C, C++, Embedded C

Industry Expertise



Test-driven Development (TDD), Object-oriented Design (OOD)


Real-time Embedded Systems, Embedded Hardware, Embedded Systems, Internet of Things (IoT), Microcontrollers, Real-time Operating System (RTOS), Embedded Software, Firmware, Bluetooth, ARM, ESP32, Nordic nRF52, ARM Embedded, Multithreading, TCP/IP, GNU, Protocol Buffers, Wireless Protocols, CNC, Reverse Engineering, Embedded Controllers, Hardware, Electronics

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