Fasih Ullah Saleem
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Open to remote and on-site roles worldwide · Pakistan

Fasih Ullah SaleemEmbedded Systems & Firmware Engineer

Embedded Systems & Firmware Engineer | STM32 | ESP32 | C/C++

I develop firmware for STM32, ESP32 and Raspberry Pi Pico in Embedded C/C++ and MicroPython: firmware design and debugging, embedded communications (UART/SPI/I2C/MQTT), sensor integration, real-time control, PCB design and hardware-software integration for IoT and industrial systems. Electrical Engineering graduate (CGPA 3.79/4.00, PEC registered) who takes projects from schematic and firmware through cloud connectivity and deployment.

Hire me for this roleSee relevant projects

Open to remote and on-site roles worldwide · Based in Pakistan · Available for freelance, contract and hobby-project work

In the stack

Where an embedded systems & firmware engineer sits in a connected product.

The solid layers are the ones this role owns: hardware & pcb, firmware, network & iot. The faded ones are the rest of the system I also build, so nothing is designed in isolation.

  1. 01Hardware & PCB
  2. 02Firmware
  3. 03Network & IoT

Core competencies

What I bring to an embedded systems & firmware engineer role.

  • Firmware Design & Debugging
  • MCU Programming (STM32 / ESP32)
  • Embedded Communications (UART / SPI / I2C / MQTT)
  • Sensor Integration & Data Acquisition
  • Real-Time System Development
  • Hardware-Software Integration
  • Version Control (Git)
  • AI-Assisted Development

Hire me for

Three things I can start on next week.

For a team, a startup, a research group or one person with an idea. Remote, worldwide, and I reply within a day.

  1. 01

    Firmware for a new STM32 or ESP32 product, drivers, peripherals, comms protocol, power modes.

  2. 02

    Bringing up a custom board: schematic review, PCB bring-up, register-level debugging with a scope on the rails.

  3. 03

    Connecting a device to the cloud over Wi-Fi, GSM or MQTT, with the backend to receive it.

Technical skills

Tools and technologies.

Embedded & Firmware

  • STM32
  • ESP32
  • Raspberry Pi Pico
  • Arduino
  • Embedded C
  • C++
  • MicroPython
  • PlatformIO
  • Keil uVision
  • IAR Embedded Workbench
  • UART / SPI / I2C
  • PWM Generation
  • Interrupt-Based Programming
  • Timers & Peripherals
  • Embedded Debugging

IoT & Communication

  • MQTT
  • TCP/IP
  • HTTP/HTTPS
  • REST APIs
  • Client-Server Architecture
  • Wireless Communication

Electrical & Power

  • PCB Design
  • Circuit Design
  • Power Electronics
  • Buck / Boost Converters
  • Battery & Power Management
  • ADC Measurement
  • Proteus

Backend & Tooling

  • Python
  • FastAPI
  • PostgreSQL
  • Docker
  • Linux (Ubuntu)
  • Git / GitHub
  • PyTest

Relevant projects

Embedded & Firmware work, built and photographed on my own bench.

Each card opens the full story: what it does, how it was built and which layers of the stack I built myself.

  • Custom four-layer PCB for the fleet tracker on a cutting mat, with GPS patch antenna, GSM module and screw terminals

    Lead: firmware, PCB and integration

    An end-to-end fleet telematics system built on a custom STM32F427 board. The device reads GPS position and MPU6050 motion data in real time, detects accidents and rollovers, and streams everything over a SIM800L GSM link to a web dashboard. A full power subsystem handles automatic switching between the vehicle battery and an onboard backup, with charging and protection circuitry, so the unit stays online even if main power is cut.

    • STM32F427
    • Custom PCB
    • GPS
    • GSM
    • IAR
  • Four-wheeled robotics vehicle with stacked microcontroller boards, motor driver and an ultrasonic sensor

    Embedded control

    A robotic vehicle controlled over Wi-Fi, pairing an STM32 for real-time motor and sensor control with an ESP32 handling wireless communication. It supports both a manual remote-drive mode and an autonomous navigation mode, showcasing tight coupling between a wireless link and an embedded control loop.

    • STM32
    • ESP32
    • Wi-Fi
    • Robotics
  • Buck-boost converter prototype with toroidal inductors and power MOSFETs, oscilloscope probes attached

    Power electronics

    A bidirectional buck/boost converter driven by STM32-generated PWM. I implemented the control firmware, then tested and tuned the converter across operating points, measuring regulation, ripple, and efficiency to validate the design under real load.

    • STM32
    • Power Electronics
    • PWM
  • IoT sensor node on a breadboard, microcontroller board wired to a temperature and humidity sensor

    Embedded + cloud pipeline

    An IoT data pipeline that takes readings from embedded sensor nodes and publishes them over MQTT to a cloud database, where they feed into monitoring applications. The project demonstrates the full telemetry loop: device acquisition, lightweight pub/sub transport, persistence, and live visualization.

    • MQTT
    • IoT
    • Cloud DB
    • Embedded

Experience and education

Engineering work, in production, since 2024.

An application engineer on simulation-driven power-system and engineering software projects, with an Electrical Engineering degree and PEC registration underneath.

  1. June 2025 to presentPakistan · remote-friendly

    Application Engineer

    • Design, evaluate and implement engineering software solutions: system architecture, workflow optimisation and technical feasibility.
    • Build and extend engineering applications in Python and FastAPI, turning technical requirements into working backend features and automation.
    • Develop automation scripts, scheduled tasks and database-backed workflows; work on simulation-driven power-system projects and design validation.
    • Deploy, configure and troubleshoot applications in Linux and virtualised (VMware ESXi) environments.
    • Run technical investigations, feasibility studies and root-cause analysis across software, infrastructure and engineering systems.
    • Write technical documentation and design-review material for a multidisciplinary electrical, software and industrial team.
  2. June 2024 to June 2025Pakistan · remote-friendly

    Engineering Intern

    • Backend development, database tasks, automation, testing and software validation.
    • Design reviews and UI/UX work in Figma.
    • Engineering simulations, data analysis and technical documentation.
  3. 2021 to 2025Lahore, Pakistan

    Bachelor of Science in Electrical Engineering

    University of Engineering and Technology, Lahore

    • CGPA: 3.79 / 4.00
    • Registered Engineer, Pakistan Engineering Council (PEC)

Questions

What people ask before hiring an embedded systems & firmware engineer.

Which microcontrollers do you work with?

STM32 (including the STM32F427 on my fleet-tracker PCB), ESP32, Raspberry Pi Pico and Arduino. I write in Embedded C and C++ with Keil uVision, IAR Embedded Workbench and PlatformIO, and in MicroPython where it is the right tool.

Can you design the PCB as well as write the firmware?

Yes. My final-year fleet tracker is a custom PCB integrating GPS, GSM, power management and sensor subsystems, with automatic main/backup battery switching, charging and protection circuitry, and the IAR firmware that runs it.

Do you take remote firmware work for international clients?

Open to remote and on-site roles worldwide, and freelance firmware projects of any size, from a hobby prototype to a production board. I am based in Pakistan and used to working async with international teams.

What communication interfaces and protocols have you implemented?

UART, SPI and I2C between modules; PWM and interrupt-driven timing; MQTT over TCP/IP and HTTP for the link to a server; and GSM (SIM800L) and Wi-Fi radios in shipped projects.

Also hire me as

The same engineer, seen from other angles.

One person, nine job titles. Each page argues the case from that field's side, with the projects that prove it.

Contact

Let's build something that works.

Hiring for a team, or need a product, prototype or hobby project built end to end? Either way it starts with one email. I reply within a day.

For teams hiringHire me as a Embedded Systems & Firmware EngineerFull-time, contract or remote. Open to roles worldwide.Email about a role →For clients and makersBuild with meA product, a prototype, a website or a hobby project. Any size.Email about a project →
Phone / WhatsApp
+92 320 9450014
Based in
Pakistan · open to remote and on-site roles worldwide
Fasih Ullah Saleem, Solutions Architect and Full-Stack Engineer
Fasih Ullah SaleemBSc Electrical Engineering, UET Lahore · PEC registered engineer