About The RoleWe are building a hardware-agnostic IoT platform that connects physical sensors, industrial controllers, gateways, and OEM devices to a unified cloud dashboard. We need an experienced IoT Systems & Integration Engineer who can build the protocol adapters, gateway software, and device abstraction layer that makes this possible. This role works directly with a large ecosystem of OEM hardware suppliers across multiple countries.The Ideal CandidateYou have spent years working with real hardware — not simulated devices. You have debugged Modbus register maps, written MQTT clients that run on embedded Linux gateways, and configured industrial IoT gateways for production deployments. You can read a hardware datasheet and write a Python protocol adapter without help. You understand that data quality from device to cloud matters more than feature velocity.Key ResponsibilitiesDevice & Protocol IntegrationBuild and maintain the device integration layer: Python and C-based protocol adapters, drivers, and translation modules for sensors, PLCs, energy meters, gateways, and OEM hardwareImplement production-quality integration adapters for: MQTT v3.1/v5.0, Modbus TCP, Modbus RTU, OPC-UA, BACnet/IP, SNMP, CoAP, HTTP REST, and proprietary OEM APIsWrite reusable protocol libraries that abstract hardware communication behind a unified Device Interface — not one-off scripts per deviceBuild and maintain the Device Compatibility Matrix: all tested hardware logged with protocol version, firmware, known issues, config templates, and onboarding effort estimateConduct hardware-in-the-loop testing for every new device: validate telemetry accuracy, command round-trip time, error handling, and reconnection behaviour under interrupted connectivityBuild device profile templates enabling configuration-based onboarding of certified device types — no customer-side code requiredImplement data normalisation: raw hardware values (register counts, voltage, proprietary units) converted to standardised engineering-unit JSON telemetryEdge & Gateway EngineeringBuild edge gateway software running on embedded Linux gateways and Raspberry Pi-class devices for local protocol translation, data buffering, and pre-processingImplement local data buffering on edge: no data loss during cloud connectivity gaps — mandatory for industrial and logistics deploymentsDevelop edge aggregation logic: configurable statistical summaries to reduce uplink bandwidth where cloud cost or connectivity is constrainedConfigure and validate edge runtimes: AWS Greengrass, Azure IoT Edge, or Node-RED on target OEM gateway hardwareImplement secure edge-to-cloud communication: mTLS with X.509 certificates, certificate rotation, and revocation handlingBuild OTA update clients on edge devices: receive, validate, stage, and apply firmware updates from the platform OTA serviceOEM & Hardware OnboardingEvaluate new hardware from the supplier ecosystem: produce integration feasibility reports and effort estimates within 48 hours of receiving a new deviceWork with OEM technical teams to obtain datasheets, SDK documentation, communication specs, and evaluation unitsWrite SDK and integration guides for each certified hardware family — enabling customers to self-onboard without raising support ticketsValidate hardware compatibility for customer deployment environments before any commercial commitment is madeMaintain complete documentation for every integration: protocol specs, firmware versions tested, known limitations, configuration templates, troubleshooting stepsRequirements5-9 years of hands-on IoT systems integration, embedded systems, or industrial automation work — lab or field hardware experience is mandatory; purely software candidates will not be consideredDeep, practical Modbus TCP and RTU experience — you have implemented Modbus masters and slaves, mapped register addresses from datasheets, and debugged communication failures at the byte level ⚑ NON-NEGOTIABLESolid MQTT knowledge: broker configuration, topic design, QoS level selection, hardware MQTT client integration and troubleshooting ⚑ NON-NEGOTIABLEPython for production-quality protocol adapter development — not scripting; you write maintainable, tested integration librariesIndustrial IoT gateway configuration and programming: Advantech, Moxa, Pepperl+Fuchs, or any equivalent embedded Linux gateway platformOPC-UA hands-on experience: browsing server address spaces, reading node values, implementing client subscriptionsAbility to read hardware datasheets, electrical schematics, and communication protocol specifications independently — this is a day-to-day requirement, not an occasional one ⚑ CRITICAL SKILLSensor domain experience across at least 3 of the following: temperature/humidity, power/energy monitoring, GPS/asset tracking, pressure/flow, vibration/accelerometer, air qualityRemote work discipline: rigorous documentation habits, async-first communication, and ability to coordinate physical hardware testing across distributed locations ⚑ REMOTE DISCIPLINENice to HaveLoRaWAN end-device commissioning, gateway configuration, and network server setup (ChirpStack preferred)Cellular IoT module integration: NB-IoT, LTE-M, or 4G — SIM7600, Quectel EC25, or equivalentBACnet/IP or BACnet MS/TP for building automation and HVAC integrationEmbedded C or C++ for device firmware or firmware interface library developmentAWS Greengrass v2 or Azure IoT Edge module developmentIEC 62443 industrial cybersecurity standard knowledgeVertical experience in any of: cold chain, energy management, smart metering, predictive maintenance, fleet telematicsSkills At a GlanceProtocols: MQTT v3.1 / v5.0 (expert) Modbus TCP + RTU (expert) OPC-UA (proficient) BACnet/IP SNMP CoAP HTTP REST LoRaWAN (advantageous)Hardware: Industrial gateway configuration (Advantech, Moxa) Raspberry Pi / embedded Linux ESP32 / Arduino class devices RS485 / RS232 serial interfaces GPIO, I2C, SPI interfaces CAN Bus (advantageous)Software: Python (production library quality) C / C++ (embedded interface level) Node-RED (flow-based edge logic) AWS Greengrass / Azure IoT Edge Wireshark (protocol debugging) Modbus Poll / UaExpert (test tools)Sensors: Temperature & humidity sensors Energy / power meters (3-phase) GPS & asset trackers Pressure & flow sensors Vibration & accelerometers Air quality (CO2, VOC) Ultrasonic / level sensors