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ESP32-C3 Firmware Developer (Embedded IoT)

Cuboid IT SolutionsUnited States🇺🇸United StatesPosted 4 Aug 2026

Why This Role Stands Out

This remote contract role offers a fantastic opportunity to develop cutting-edge firmware for an embedded IoT device, honing your skills with ESP32-C3 and ESP-IDF. You'll thrive here if you're a mid-senior developer with a strong background in embedded C/C++, Wi-Fi protocols, and PCB design, eager to contribute to innovative technology. Apply now to leverage your expertise and enjoy the flexibility of a fully remote position with competitive compensation.

Quick Overview

Seniority
Mid Senior
Work mode
Remote
Location
United States
Posted
3 weeks ago
TCP/IPC++HTTPIoT

Job Description

Now Hiring: ESP32-C3 Firmware Developer (Embedded IoT)

Location: 100% Remote (US)
Type: Short-Term Contract
Rate: Competitive (Include your hourly rate with resume)

We are seeking an experienced ESP32-C3 Firmware Developer to design firmware and support PCB development for an embedded IoT device. The project involves developing firmware for the ESP32-C3-MINI-2U microcontroller to enable Wi-Fi connectivity and transmit email/SMS notifications through an internet-connected router.

Key Responsibilities

  • Develop firmware for ESP32-C3-MINI-2U using ESP-IDF
  • Implement Wi-Fi Station & Access Point modes with web-based configuration
  • Support email/SMS notification functionality via SMTP
  • Optimize low-power operation using Deep Sleep mode
  • Interface with a PIC16F1503 microcontroller via GPIO
  • Design a 4-layer PCB compatible with an existing enclosure
  • Store Wi-Fi credentials using EEPROM/NVS
  • Participate in weekly status meetings via Microsoft Teams or Zoom

Required Skills

  • Strong experience with ESP32-C3 / ESP-IDF
  • Embedded C/C++ firmware development
  • Wi-Fi, TCP/IP, HTTP, SMTP, and networking protocols
  • Low-power embedded system design (Deep Sleep)
  • GPIO, EEPROM/NVS, and peripheral interfacing
  • PCB design experience (Altium, KiCad, Eagle, or similar)
  • Experience with IoT and hardware integration

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