Embedded Systems / IoT Engineer (PAYGO Solar Project)*

*Location:* ANY Where (Hybrid / Remote options available *Employment Type: with potential for long-term engagement --- ### *About the Role* We are developing a *Pay-As-You-Go (PAYGO) solar energy system* that allows customers to pay based on energy usage (kWh). We are seeking an *Embedded Systems / IoT Engineer* to design and build the control box that will integrate with our ASP.NET backend system and manage real-time power control. --- ### *Key Responsibilities* * Develop firmware for microcontrollers (ESP32/Arduino/STM32) * Integrate hardware components: * Relay / Contactor (power control) * Energy meter (kWh tracking) * GSM/WiFi module (communication) * Implement communication between device and backend (HTTP API or MQTT) * Build and manage *OTA (Over-The-Air) firmware update system* * Ensure *offline functionality* (device should enforce rules without internet) * Implement *anti-tamper mechanisms* (bypass detection, alerts) * Collaborate with ASP.NET developer for API integration * Support prototyping, testing, and deployment --- ### *Technical Requirements* * Strong experience with *embedded C/C++ (Arduino or ESP-IDF)* * Experience working with *ESP32 or similar microcontrollers* * Knowledge of *IoT communication protocols* (HTTP, MQTT) * Experience with *GSM modules (SIM800/SIM7600)* is a plus * Familiarity with *energy metering or sensor integration* * Understanding of *power systems (AC/DC, relays, contactors)* * Experience with *OTA firmware updates* --- ### *Nice to Have* * Experience in *PAYGO systems or solar/energy projects* * Knowledge of *hardware design and PCB prototyping* * Experience with *cloud platforms (Azure, AWS IoT, etc.)* --- ### *Deliverables* * Fully functional control box prototype * Firmware integrated with backend system * Documentation (setup, API integration, firmware logic) --- ### *Compensation* * Negotiable (based on experience and project scope) * Flexible engagement (per project / milestone-based payment) --- ### *How to Apply* Send: * Your CV / portfolio * Examples of previous IoT or embedded projects * Brief explanation of similar systems you’ve built

Project ID: 40404824