Expert in Embedded Software Engineer - Roadmap

 1️ C Programming (Very Strong Foundation Required)

Book:

"C in Depth" by Deepali Srivastava

Topics to Master

Core C

Variables, Data types

Pointers (very very important)

Pointer to pointer

Function pointers

Structures

Unions

Enum

Storage classes

Memory layout

Advanced C

Dynamic memory (malloc, calloc, realloc, free)

File operations

Bit manipulation / masking

Preprocessor & macros

Volatile keyword

Const correctness

Compiler & Build

gcc

Makefile

Static library (.a)

Dynamic library (.so)

Linking process

Cross compilation (important for embedded)

Practice Platforms

LeetCode

HackerRank

Focus on:

Strings

Matrix problems

Structures

Bit masking

Pointers-based problems

2 Data Structures & Algorithms (Important for MNC Interviews)

Sorting

Bubble sort

Insertion sort

Merge sort

Quick sort

Heap sort

Linear Structures

Singly Linked List

Doubly Linked List

Stack

Queue

Circular Queue

Trees

Binary Tree

BST

Tree traversal (DFS, BFS)

Advanced

Heap

Graph (if targeting product companies)

Matrix-based problems

If you want strong MNC chances (Qualcomm, Intel, Nvidia etc.), DSA must be solid.

3 Basic C++

You don’t need very advanced C++ for embedded roles.

Just learn:

OOP concepts

Classes & Objects

Constructor/Destructor

Inheritance

Polymorphism

STL basics

4️ Embedded Systems (VERY IMPORTANT SECTION)

Microcontroller Choice

You can choose:

8051 (for basics)

STM32 (Recommended)

Courses:

Udemy courses:

- https://www.udemy.com/course/microcontroller-embedded-c-programming/

- https://www.udemy.com/course/mastering-microcontroller-with-peripheral-driver-development/

- https://www.udemy.com/course/stm32l4-bare-metal-peripheral-drivers-development/

- https://www.udemy.com/course/microcontroller-programming-stm32-timers-pwm-can-bus-protocol/

Must Learn (Deep Level)

ARM Architecture

Cortex-M architecture

Registers

Memory map

Stack

Interrupt vector table

Peripherals (Write Drivers Yourself)

GPIO

UART

SPI

I2C

PWM

Timer/Counter

Interrupt

ISR routine

Programming Style Implement:

Polling method

Interrupt method

Projects (Very Important for Resume)

Build 2–3 projects like:

LCD + Keypad matrix

RTC interface

RFID reader

Sensor-based system

UART communication project

5️ Linux / OS Concepts (Must for MNC)

This is what separates average candidate from strong candidate.

Core Topics

Process

Thread

IPC Mechanisms:

Shared memory

Message queue

Semaphore

Mutex

Spinlock

Scheduler mechanism

MMU

Process management

Virtual memory

Practice on real Linux:

fork()

exec()

pthread

signals

mmap()

6 Socket Programming

- OSI & TCP/IP basics

- TCP/UDP sockets

- Socket Programming 

- MQTT or IOT project

7 RTOS (Big Advantage)

Learn:

FreeRTOS

Courses:

- https://www.udemy.com/course/mastering-rtos-hands-on-with-freertos-arduino-and-stm32fx/

- https://embetronicx.com/tutorials/rtos/freertos/rtos-basic-tutorial-for-beginners/

Topics:

Tasks

Scheduling

Mutex vs Semaphore

Queue

ISR handling

Context switching

Suggested Order (Best Sequence)

• C (3–4 months)
• DSA (parallel practice)
• Build system + Makefile
• Embedded (4–6 months deep work)
• Linux OS concepts
• RTOS