With over 20 years of experience, we are part of Vibra—the largest multi-energy platform in Brazil—and a market reference in the energy sector. Our operations span Energy Efficiency, Free Energy Market, Decarbonization, Electric Power, and Renewable Generation, including more than 100 solar power plants. Shall we jointly build a more sustainable future for the next generations? The energy that drives transformation lies in the diversity of our talents, and we believe it is essential to foster an increasingly diverse and inclusive workplace. Therefore, we actively encourage applications from people with disabilities, Black individuals, women, LGBTQIAP+, people aged 60+, and Indigenous peoples. Join our team and become part of Brazil’s energy transition journey! **Responsibilities and Duties** We are seeking a Mid-Level Developer responsible for: * Developing firmware for IoT solutions * Analyzing firmware failures and implementing corrective actions * Developing hardware and performing failure analysis for solutions * Developing firmware and hardware testers * Preparing and maintaining technical documentation for developed code **Requirements and Qualifications** * Completed undergraduate degree in Engineering Technology, Electronic Engineering, or related fields, with focus on hardware and firmware development * Intermediate English proficiency for reading technical documentation * Minimum 3 years of prior experience developing IoT solutions * Knowledge of EDA tools: KiCad, Altium, Eagle * Knowledge of interfaces: USB UART, RS232, RS458, I2C, SPI, Flash, EEPROM * Experience in coding: C++, Python, JSON, RTOS, OTA * Knowledge of protocols: MQTT, Modbus * Familiarity with technologies: Wi-Fi, BLE, LoRa, 4G, NB-IoT **Additional Information** * **Work Location:** São Paulo – SP * **Work Format:** Hybrid * **What We Offer:** * Competitive market-aligned salary * Benefits: Meal Voucher, Transportation Voucher, Health Insurance, Dental Insurance, Culture Voucher, Wellhub, Galena, Profit Sharing (PLR), Birthday Day Off, Life Insurance, and more... * Organizational culture focused on development, innovation, and sustainability. **Let’s transform energy together to renew the world? Join Comerc!** With over 20 years of experience, we have become part of Vibra—the largest multi-energy platform in Brazil—and a market reference in the energy sector, operating across Energy Efficiency, Free Energy Market, Decarbonization, Electric Power, and Renewable Generation, with over 100 solar power plants. In 2024, we surpassed R$1 billion in EBITDA, reinforcing our commitment to sustainable growth and national energy transition. Our innovative energy solutions make corporate decarbonization more tangible, precise, and achievable. Here, ESG is not a separate agenda from business strategy—it is how we pursue sustainable development and contribute to a low-carbon economy. Join our team and help transform the future with your energy—working in a collaborative environment full of meaningful challenges and development opportunities!