I design and build complete embedded products — from PCB to firmware to software — so you don't need to coordinate three different specialists. 15+ years of experience, low-power and Bluetooth design expertise, and every line of firmware backed by real testing.
* Hardware Design
----------------------
I design complete boards in Altium, KiCad, and OrCAD — power section, MCU section, digital and analog peripherals — based on Microchip PIC, ARM Cortex, and ESP32 microcontrollers. Specific areas of expertise include:
* Low-power design for battery-powered devices
* Shield design for commercial platforms (Arduino, Raspberry Pi, BeagleBone)
* PCB design with Bluetooth connectivity (Classic and BLE)
* Firmware Development
-----------------------------
I write firmware in C for ARM Cortex M0/M0+/M3/M4/M33 architectures (STM32, NXP, Silicon Labs EFM32/EFR32, Nordic nRF5x) and for ESP32 using the ESP-IDF framework, in both bare-metal and multitasking environments (FreeRTOS, RTX). I cover the full application stack:
* Low-level drivers (GPIO, UART, SPI, I2C, PWM)
* Drivers for sensors, MEMS, memories, fuel gauges, displays
* Application logic, bootloaders, and OTA
* Bluetooth stacks (Classic and BLE)
* Every firmware project I develop comes with unit, integration, and stress testing to ensure robustness and long-term reliability.
* Why Work With Me
------------------------
My key strength is cross-domain vision: I can design hardware with the firmware that will run on it already in mind, and write firmware knowing exactly what happens at the electrical level. This reduces iterations, development time, and project risk — real value whether you need fast prototyping or a product ready for mass production.
I'm quick to pick up new frameworks and toolchains based on project needs.
ARM Cortex-M
Embedded C
Firmware Programming
Muhammad Bilal J.
Cantonment, Pakistan
$35/hr
4.7
158 jobs
I help startups and founders turn hardware ideas into working prototypes and production-ready products. My work covers embedded systems, PCB design, IoT devices, wearable prototypes, firmware, testing, and manufacturing files.
I am a Top Rated Plus Industrial Designer and Electronics Engineer with 7+ years of experience, specialising in end-to-end product development from concept to production.
My expertise covers PCB design, embedded systems, IoT development, wearable device development, firmware, enclosure design, prototyping, testing, and manufacturing support. I work with platforms such as STM32, ESP32, nRF, Raspberry Pi, and custom embedded hardware to develop reliable and scalable smart products.
What I can help you with:
• Schematic design and PCB layout
• Embedded firmware development
• ESP32, STM32, nRF, Arduino, Raspberry Pi-based systems
• IoT devices with BLE, Wi-Fi, GPS, LTE, and sensors
• Wearable electronics and compact product prototypes
• Battery-powered and low-power hardware design
• Prototype testing, debugging, and improvement
• Gerber, BOM, CPL, STEP files, and manufacturing support
What makes my work different is my complete product development approach. I do not only design a PCB or enclosure separately. I consider electronics, firmware, mechanical fit, compact wearable form factors, component availability, assembly, testing, DFM, and production requirements from the beginning.
This helps reduce redesigns, avoid manufacturing issues, and create products that are practical for real-world use and mass production.
I have worked with international clients on IoT devices, wearable electronics, health monitoring wearables, industrial systems, sensor-based products, smart consumer devices, medical/health monitoring prototypes, and custom embedded hardware.
If you are looking for a reliable engineering partner who can take your idea from concept to working prototype and production-ready product, I can help you build it with a professional, practical, and manufacturing-focused approach.
Regards,
Muhammad Bilal Javaid
Microchip
EasyEDA
PCB Design
Prototype Design
ESP32
Embedded System
Multilayer PCB
Firmware Programming
Altium Designer
Raspberry Pi
Electrical Engineering
App Development
Internet of Things
Industrial Design
Microcontroller
Hardware Design
Wearable Technology
AI Development
Electronic Circuit Design
Hardware Prototyping
Faizan H.
Karachi, Pakistan
$50/hr
4.9
189 jobs
Passionate about designing Embedded devices, power electronics, battery operated systems, Raspberry Pi HATs, Arduino Shields.
I turn your ideas into market ready products.
Expertise in KiCAD, Eagle, Altium and EasyEDA.
I have fully functional electronics lab where I offer prototype testing services.
I can manage production runs from any PCB manufacturer.
On firmware side, I can program in Arduino IDE, stm32Cube IDE and others...
Extensive experience with PLCs like Siemens, Fatek, Click, Do More.
With customer satisfaction a priority.
I let my work profile speak for myself. Proudly boost my top rated status and 100% happy clients...
Electrical Engineering
PCB Design
Electronic Design
Eagle
PLC Programming
Arduino
Analog Electronics
Embedded System
Schematic
Multilayer PCB
KiCad
EasyEDA
STM32
ESP32
Raspberry Pi
Kiran S.
Pune, India
$60/hr
4.9
26 jobs
I have a rich experience in Embedded products development, hardware & firmware development for Industrial controllers, IoT, Edge AI, Medical devices, Automotive, Wearable devices, Water resource management, Consumer Electronics, and Telecom Products.
Hardware Skills and experience:
📌 Hardware architecture and product design, design review,
📌 Designing based on microcontrollers (ARM Cortex M0, M3, M4, M33, ESP32,
nRF52xx, nRF54Lxx, RP-2040, NXP, PIC, MSP430, ATMEGA, ATSAM, SOM, etc.)
📌 Altium Designer, KiCad, EasyEDA, Fusion 360, MS Visio, Draw,io, PCB Design & Manufacturing (JLCPCB)
📌 Multi-layer, Multi-board, Mixed signal, high-speed, RF-design, EMI/EMC compliance design,
FPC, BGA.
📌 RF Design, Analog, Signal Conditioning, Power Supplies, MPPT Battery Chargers & BMS.
📌 SPI, I2C, I2S, CAN, USB, RS485, Ethernet, LCD, Touch pads, Camera.
📌 DDR3, HDMI, USB2.0/3.0/TypeC, eMMC, SD card.
📌 BLE, Wi-Fi, Sub1GHz, LoRaWAN, RFID, NFC, NB-IoT, Zigbee
📌 IMU sensors, Load Cell, CMOS Image Sensor, Digital Microphone, Motion Sensor, Color
Sensor, Light Sensor, CO sensors, Environment Sensor, Temperature & Humidity Sensors.
📌 Flow sensor, Soil moisture sensors, pH sensor, NPK sensor, Ultrasonic sensors, encoders.
📌 SIM7670G, MC60/M95/UC15/UC20/EC20, SIM800C/H.
📌 Digital oscilloscopes, logic analyzers.
📌 Documentation: Product design documents, User manual, Installation manual
Firmware Skills and experience:
📌 Designing and Programming based on microcontrollers (ARM Cortex M0, M3, M4, M33,
ESP32, nRF52xx, nRF54Lxx, RP-2040, NXP, PIC, MSP430, ATMEGA, ATSAM, SOM, etc.)
📌 VScode, ESP-IDF, nRF Connect SDK, STM32CubeIDE, Arduino, MPLAB X, MCUXpresso,
Eclipse, FreeRTOS, Zephyr RTOS, and Yocto Projects.
📌 Raspberry Pi, CLI
📌 Edge AI - TinyML, Edge Impulse, BME AI - Studio
📌 Strong programming skills in Embedded C/C++, Micro python, Bootloader, and Embedded
Linux
📌 SPI, I2C, I2S, CAN, USB, RS485, Ethernet, LCD, Touch pads, Camera, GNSS.
📌 BLE, Bluetooth Classic, Wi-Fi, Sub1GHz, LoraWAN, RFID, NFC, NB-IoT, Zigbee
📌 Frameworks/Libraries: ESPHome, TinyGSM, Tiny GPS, LVGL, GFX, TRF7970A, Tasmota,
GP2040-CE, WLED.
📌 HMI: Mapple Systems - HMI5071L and cMT2078
📌IMU sensors, Load Cell, CMOS Image Sensor, Digital Microphone, Motion Sensor, Color
Sensor, Light Sensor, CO Sensor, Environment Sensor, Temperature & Humidity Sensors.
📌 Flow sensor, Soil moisture sensors, pH sensor, NPK sensor, Ultrasonic sensors, encoders.
📌 SIM7670G, MC60/M95/UC15/UC20/EC20, SIM800C/H.
📌 CAN, CANOpen, SAE-J1939, I2S, EtherNet/IP, Profinet, Modbus TCP, MQTT, and https.
📌 JTAG, SWD, J-Link, ST-Link.
Intellectual property protection:
I’m a professional engineer and I respect your intellectual property rights, this is an area where I can earn your trust by safeguarding your product, which could involve patents, trademarks, or code protection. This is one of the ways that I offer additional value to my clients.
I invite you to reach out to discuss your projects or any questions you might have.
I'm open to both short-term and long-term engagements and to help you with high-quality, innovative solutions.
Embedded Linux
Embedded C
Embedded System
Wireless Communication
FreeRTOS
Product Design
Instrumentation
Altium Designer
ARM Microcontroller
Automation
Hardware Troubleshooting
Firmware Programming
Serial Port Interfacing
Automotive Design
Hardware Design
Asad A.
Karachi, Pakistan
$25/hr
4.4
30 jobs
As an Expert PCB Design Engineer and PCB Product developer. I have the determination and knowledge to build products from initial PCB idea to prototype, with respect to latest technologies by merging my 7 years of professional expertise with the capacity to evaluate, design, and implement a wide range of complex electronic embedded/standalone system. I enjoy developing, innovating, designing, and motivating my self from my work.
➊✅MyTechnical Skills:
➤PCB Electronic System Design:
1-PCB Creation (Schematics Design, PCB design, BOM creation, Gerber file...)
2-PCB In Analog Circuit Design (Measurement, power supply, A/D and D/A Converters, & filters...)
3-PCB In Digital Circuit Design
4-Interface Buses (SPI, I2C, RS-232, RS-485, ...)
5-Memory Interfaces (DDR1-3, SDRAM, Serial/Parallel Flash, ...)
6-High Speed PCB & I/O Interfaces (USB, Ethernet, PCI Express, LVDS, ...)
7-Embedded PCB Microcontroller Software Design (Arduino, PIC, STM32, AVR, EFM32, Novatec)
8-Having sound knowledge of Fast PCB Board Design - Multi-core processors, DDR, MIPI, Ethernet, USB, SDIO
9-Bluetooth, ZigBee, Wi-Fi, LoRa, and Sub-GHz RF Design
10-Expertise in MSP430, STM32, ATMEGA, A20, Free-scale MC9SC, 8-Bit to 32 Bit microcontroller System designs
➋✅Mechanical Housing Design for PCB
1-PCB Product enclosure Design review for optimal manufacturing (Specialised in injection molding and 3D printing-In House Facility).
2-CAD Design, Visualisation, and Simulations in Solidworks, Autodesk Inventor, and Fusion 360.
3-Solidworks Design with simulation and animation
4-Marketing Advertisement Animations for the product.
➤Design Tools Experience:
1-Altium Designer (Professional)
2-Kicad
3-Eagle
4-Proteus
5-Cadence Allegro/OrCAD
6-SolidWorks
I am open to new methodologies, tools, and technologies. I always provide the top optimised design with respect to cost, reliability and robustness. Looking forward to discuss with you about your product ideas
BR,
Asad Azhar
3D Modeling
PCB Design
Multilayer PCB
Schematic
Circuit Design
Prototype
Electronic Design
Firmware Programming
Electronics
Electrical Design
Power Electronics
Electrical Engineering
Altium Designer
Bill of Materials
Firmware
Bhavin V.
Rajkot, India
$50/hr
4.7
171 jobs
I help companies turn electronics ideas into real, production-ready products.
I am an Embedded Systems Engineer with 10+ years of experience designing hardware, developing firmware, and building connected IoT and Edge AI devices from concept to mass production.
I have worked with startups, research labs, and global organizations, including collaborations with Fortune 500 companies, The University of Bristol, and PGA of America.
I don’t just build circuits I build complete products that are reliable, scalable, and ready for manufacturing.
What I do end-to-end
• System architecture and product definition
• PCB design and hardware engineering
• Firmware development and optimization
• Edge AI integration (TinyML, on-device inference)
• Wireless connectivity and IoT cloud integration
• Mechanical design (enclosure + DFM-ready CAD)
• Prototype development and production support
I regularly take products from idea to prototype to production-ready hardware.
---
Core expertise
Embedded hardware development
• ESP32
• Nordic (nRF51, nRF52, nRF91)
• STM32, STM8
• Raspberry Pi platforms
• NXP, Snapdragon, BeagleBone
• NVIDIA Jetson AGX Orin
• Google Coral Edge TPU
• Axelera Metis AI Platform
• EdgeCortix SAKURA
• ARM Cortex controllers
• Texas Instruments MSP and CC series
• Atmel AVR and Arduino
I design reliable embedded systems used in IoT devices, industrial equipment, wireless products, and research hardware.
---
PCB design and hardware engineering
Tools
• Altium Designer
• KiCad
• EagleCAD
• OrCAD
Services
• Schematic design
• Multilayer PCB layout
• High-speed PCB design
• RF and wireless board design
• Design for manufacturing (DFM, DFA)
• BOM optimization and cost reduction
• Production-ready manufacturing files
---
Firmware development
• Embedded C and C++
• FreeRTOS
• Embedded Linux
• Driver and low-level development
• Low-power firmware optimization
---
Edge AI
• TinyML and on-device AI models
• Sensor data processing and inference at the edge
• ESP32 / ARM-based AI deployment
• Reducing cloud dependency with real-time intelligence
• AI-enabled IoT product design
---
Communication and connectivity
• Bluetooth, BLE, BLE 5
• WiFi
• LoRa, LoRaWAN
• NB-IoT
• Thread, Zigbee
• NFC, RFID
• CAN
• UART, SPI, I2C, USB, Ethernet
Cloud and protocols
• MQTT
• HTTP
• AWS IoT, AWS Lambda and cloud integration
---
Mechanical design
• Enclosure design for embedded products
• 3D CAD modeling (production-ready)
• Thermal and space optimization
• Design aligned with PCB and manufacturing constraints
• Support for injection molding and prototyping
---
IoT product experience
• EdgeAI Device for ATM
• High-Speed Autonomous Surveillance Drone (350–400 km/h)
• AI Personal Assistant
• Smart Home Automation Systems
• Wireless IoT Sensors
• Industrial Monitoring Systems
• GPS and Tracking Devices
• Medical and Research Hardware
• Automation Controllers
• Cloud-connected Embedded Devices
---
What I deliver
• Production-ready PCB designs
• Stable, optimized firmware
• Functional hardware prototypes
• Edge AI-enabled intelligent devices
• Hardware debugging and performance optimization
• Complete manufacturing support and documentation
---
Client feedback
“Bhavin is such a fantastic developer to work with. He was professional and handled all modifications seamlessly. He also immersed himself in the problem and provided unique solutions to the hardware and software challenges.”
“I would happily employ Bhavin again. He is extremely efficient, works very fast, and communicates very well. The product was delivered on time and worked perfectly.”
---
If you are building a new hardware product, IoT device, or Edge AI system, feel free to reach out to discuss your project.
Best regards
Bhavin Vaghela
Arduino
AWS IoT Core
Electrical Engineering
Firmware Programming
Hardware Design
Qt Framework
ESP32
Industrial Internet of Things
Embedded C
PCB Design
Embedded System
Microcontroller Programming
Internet of Things
OpenWrt
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