IoT Systems & Integration Engineer

About the Role We 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 Candidate You 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 Responsibilities Device & Protocol Integration Build and maintain the device integration layer: Python and C-based protocol adapters, drivers, and translation modules for sensors, PLCs, energy meters, gateways, and OEM hardware Implement 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 APIs Write reusable protocol libraries that abstract hardware communication behind a unified Device Interface — not one-off scripts per device Build and maintain the Device Compatibility Matrix: all tested hardware logged with protocol version, firmware, known issues, config templates, and onboarding effort estimate Conduct hardware-in-the-loop testing for every new device: validate telemetry accuracy, command round-trip time, error handling, and reconnection behaviour under interrupted connectivity Build device profile templates enabling configuration-based onboarding of certified device types — no customer-side code required Implement data normalisation: raw hardware values (register counts, voltage, proprietary units) converted to standardised engineering-unit JSON telemetry Edge & Gateway Engineering Build edge gateway software running on embedded Linux gateways and Raspberry Pi-class devices for local protocol translation, data buffering, and pre-processing Implement local data buffering on edge: no data loss during cloud connectivity gaps — mandatory for industrial and logistics deployments Develop edge aggregation logic: configurable statistical summaries to reduce uplink bandwidth where cloud cost or connectivity is constrained Configure and validate edge runtimes: AWS Greengrass, Azure IoT Edge, or Node-RED on target OEM gateway hardware Implement secure edge-to-cloud communication: mTLS with X.509 certificates, certificate rotation, and revocation handling Build OTA update clients on edge devices: receive, validate, stage, and apply firmware updates from the platform OTA service OEM & Hardware Onboarding Evaluate new hardware from the supplier ecosystem: produce integration feasibility reports and effort estimates within 48 hours of receiving a new device Work with OEM technical teams to obtain datasheets, SDK documentation, communication specs, and evaluation units Write SDK and integration guides for each certified hardware family — enabling customers to self-onboard without raising support tickets Validate hardware compatibility for customer deployment environments before any commercial commitment is made Maintain complete documentation for every integration: protocol specs, firmware versions tested, known limitations, configuration templates, troubleshooting steps Requirements 5–9 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 considered Deep, 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-NEGOTIABLE Solid MQTT knowledge: broker configuration, topic design, QoS level selection, hardware MQTT client integration and troubleshooting ⚑ NON-NEGOTIABLE Python for production-quality protocol adapter development — not scripting; you write maintainable, tested integration libraries Industrial IoT gateway configuration and programming: Advantech, Moxa, Pepperl+Fuchs, or any equivalent embedded Linux gateway platform OPC-UA hands-on experience: browsing server address spaces, reading node values, implementing client subscriptions Ability to read hardware datasheets, electrical schematics, and communication protocol specifications independently — this is a day-to-day requirement, not an occasional one ⚑ CRITICAL SKILL Sensor domain experience across at least 3 of the following: temperature/humidity, power/energy monitoring, GPS/asset tracking, pressure/flow, vibration/accelerometer, air quality Remote work discipline: rigorous documentation habits, async-first communication, and ability to c