Embedded Software Engineer | RTOS | ARM architecture & trustzone | Embedded Security | Secure Embedded Systems

Passionate about exploring how hardware and software interact at the lowest level. Each steps toward understanding systems more deeply from how a processor boots to how secure firmware runs reliably under constraints.

Currently exploring the deeper side of embedded systems, where firmware meets operating systems and security meets performance.

• 🧩 mkernel: A custom RTOS from scratch to understand how scheduling, synchronization, and memory management work at the core.
• ⚙️ Strengthening low-level firmware design through real-world STM32 and ARM cortex M based projects.
• 🔐 Experimenting with secure firmware concepts like TrustZone and verified boot mechanisms.
• 🔎 Exploring memory allocators, stack behavior, and system-level debugging and how kernel concepts translate to embedded and real-time environments.

Continuing the journey toward mastering system-level development -> aiming to design and contribute to embedded systems that are secure, efficient, and meaningful for the community.

• A deep curiosity to understand how systems truly work from the first instruction that powers a processor to the final line of firmware that makes a device come alive is what drives this journey.
• The focus is not just on writing code, but on contributing expertise that can help design smarter, safer, and more efficient technologies.
• Solving complex embedded and system-level challenges feels meaningful when it transforms intricate hardware-software interactions into something reliable and useful for world.

• 🔸 Custom RTOS Development

  • A lightweight experimental operating system project aimed at learning and implementing the core building blocks of a kernel starting from memory management and expanding toward process handling, scheduling, synchronizing processes and system-level services. mkernel

• 🔸 Crash Dump Analysis Tool (Integrated these mechanisms in ongoing projects to improve fault traceability, reduce debugging time)

  • Developed a crash dump collection and analysis framework to investigate unexpected faults for ARM cortex M.
  • During exceptions or hard faults, the system captures complete core context including data from general-purpose registers, stack pointer (SP), link register (LR), program counter (PC), and program status register (xPSR).
  • This captured dump is then parsed and analyzed to identify the root cause of failures or abnormal firmware behavior.

• 🔸 Secure Firmware Installtion and Upgrade System (Key concepts from this design are now part of production firmware to strengthen the security chain in embedded systems.)

  • Developed Bootloader + App system with image verification, rollback prevention, and integrity checks.
  • Designed a secure firmware installation and update mechanism to ensure firmware integrity and authenticity during production and deployment.
  • The process ensures firmware validation through cryptographic hash calculation and digital signature verification, following proper authentication procedures to maintain a trusted and secure firmware environment.

• 🔸 Dynamic Memory Manager
  A lightweight memory allocation system using static buffer management for embedded devices. dynamic_memory_managment

Always open to meaningful conversations around embedded systems, firmware design, and system-level development.
Whether it’s exploring an idea, discussing architecture, or collaborating on something that pushes the boundaries of how hardware and software interact, every exchange is a chance to learn something new.

📬 Feel free to reach out or just say hi, great ideas often start with a simple conversation.

• 💼 LinkedIn -> manoj554
• 🧑‍💻 GitHub -> manoj-kumar-mondal
• ✉️ Email: devwithmanoj@gmail.com

⭐ If you find my projects interesting, consider giving them a star, it keeps the motivation alive!