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Embedded Systems Engineer

Embedded engineers write the software that runs inside devices: appliances, cars, medical equipment, sensors and industrial machines. They work close to the hardware, usually in C (and increasingly C++), with tight limits on memory, power and timing.

What the job involves

  • Write firmware for microcontrollers that read sensors and control motors, displays and radios.
  • Configure hardware peripherals through registers, timers and interrupts.
  • Make code fit in kilobytes of memory and meet real-time deadlines.
  • Debug with oscilloscopes, logic analysers and on-chip debuggers.

Core skills

  • C in depth
  • Pointers, memory and bit manipulation
  • Microcontroller architecture
  • Interrupts and timers
  • Communication protocols (UART, SPI, I2C)
  • C++ for larger systems

Your learning path

Work through the steps in order. Each one links to the lessons and practice to use.

  1. Step 1: C fundamentals

    C is the main language of embedded systems. Learn it carefully, including exact data types and how the compiler works.

  2. Step 2: Pointers and memory

    Hardware registers are reached through pointers, and memory is scarce. Understand pointers, arrays, structs and where every byte lives.

  3. Step 3: Bits, registers and the preprocessor

    Setting and testing individual bits is everyday embedded work, and the preprocessor configures code for different boards.

  4. Step 4: Writing safe, predictable C

    Embedded bugs can be hard to reach and costly. Avoid undefined behaviour, handle errors explicitly, and keep data structures simple and bounded.

    Not on Laviyx Learn yet

    • MISRA C coding guidelines
    • Static analysis tools

  5. Step 5: Microcontrollers and hardware

    Apply C to real hardware: read datasheets, configure peripherals, and handle interrupts.

    Not on Laviyx Learn yet

    • A microcontroller platform (Arduino, then STM32 or ESP32)
    • GPIO, timers, interrupts and ADC
    • UART, SPI and I2C communication
    • Basic electronics and reading datasheets
    • A real-time operating system such as FreeRTOS

  6. Step 6: C++ for larger embedded systems

    Many modern embedded projects use a restricted subset of C++ for classes and templates without heap allocation.

  7. Step 7: Prepare for interviews

    Expect C questions on pointers, memory, volatile, bit manipulation and interrupts, and small C coding tasks.

Projects to build

Projects prove your skills and give you something to show.

  • Blink LEDs in patterns and read a button with debouncing on a microcontroller.
  • Log temperature sensor readings over UART using a circular buffer.
  • Write a small command parser that controls a device over a serial port.

Interview preparation

This path is a suggested order. Requirements differ between companies, so also read job descriptions for the roles you are applying to.

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