Firmware Developer - DLMS/ COSEM ( Smart Gas Metering)

Job Title: Firmware Developer - DLMS/ COSEM ( Smart Gas Metering) Company: SATRUC APPLIANCES PRIVATE LIMITED Job Category: Python Developer Roles & Responsibilities: We are looking for an experienced Embedded Firmware Developer to design, develop, test and maintain DLMS/COSEM\-compliant firmware for battery\-operated ultrasonic smart gas meters. The candidate will be responsible for embedded C development, smart metering protocols, secure communication, valve control, low\-power optimisation and certification support. Key Responsibilities * Develop and maintain embedded C firmware for ultra\-low\-power ultrasonic smart gas meters. * Implement DLMS/COSEM protocols, including OBIS codes, interface classes, DLMS services, HDLC and Wrapper communication. * Develop metering functionalities such as flow measurement, meter indexing, billing profiles, load profiles, events, alarms and tariff management. * Implement valve control, tamper detection and security features. * Integrate communication modules such as NB\-IoT, LoRaWAN, RF and MIU. * Implement DLMS security, including HLS authentication, AES\-128\-GCM and key management. * Develop Firmware Over\-The\-Air (FOTA) functionality using DLMS Image Transfer. * Optimise firmware for long battery life (10–15 years). * Perform firmware testing, debugging and hardware integration. * Support product certification, conformance testing and type approval activities. * Strong problem\-solving and debugging skills. * Ability to independently develop and maintain embedded firmware. * Good understanding of hardware\-software integration. * Experience working on smart metering or IoT\-based embedded products. Work Location: In person Work Location: Hyderābād, India Availability: Full time

Required Technical Skills * Experience in smart gas metering or ultrasonic gas metering products. * Knowledge of NB\-IoT/LTE\-M AT commands and communication module integration. * Experience with DLMS conformance and certification testing. * Knowledge of Python\-based test automation. * Familiarity with Guru or related DLMS development tools. Educational Qualification Preferred Candidate Profile Benefits: Key Skills: Python, Git Salary: INR 20000 - 60000 per yearly