I will design a professional multilayer pcb with emi compliant layout

Most embedded projects fail not because of bad code but because of bad hardware. I handle both sides.

I design the hardware (schematic + PCB) and bring it up with firmware, so you get a system that's been tested end-to-end not handed off between two people who never talk to each other.

Platforms I work with:

STM32 (bare-metal and HAL)

ESP32 / ESP32-WROVER (BLE, Wi-Fi, MQTT)

Raspberry Pi / Radxa / Allwinner SOM carriers

Arduino, Arduino Opta, Nuvoton N76E003, ATmega328P

Interfaces I routinely integrate:

Sensors: I2C, SPI, RS485/Modbus, 420mA analog

Displays: MIPI-DSI, OLED, TFT

Connectivity: BLE, Wi-Fi, Ethernet (W5500), USB-C PD

Audio: I2S, stereo amp, multi-room sync

Deliverables include full schematics, PCB files, firmware source, and documentation. Whether it's a prototype or production-ready design, I'll give you something you can hand to a CM. Message me with your project brief to get started.