Backend Systems Engineer - IoT/Smart City

Avensys is a reputed global IT professional services company headquartered in Singapore. Our service spectrum includes enterprise solution consulting, business intelligence, business process automation and managed services. Given our decade of success, we have evolved to become one of the top trusted providers in Singapore and service a client base across banking and financial services, insurance, information technology, healthcare, retail and supply chain. We are currently looking to hire a Backend Systems Engineer - IOT/Smart City. This is an exciting opportunity to expand your skill set, achieve job satisfaction and work-life balance. More details as below. ROLES AND RESPONSIBILITIES Join the Software Engineering team on a physical Operations Technology (OT) integration project. You will build and maintain the backend systems that connect OT field devices to the digital twin platform — handling real-time data ingestion, protocol translation, and system integration across industrial communication standards. Key Responsibilities Develop and maintain backend services and middleware for OT/IoT data ingestion using OPC-UA, MODBUS, and MQTT protocols. Build data pipeline components that normalise, process, and route telemetry from field devices to platform services and 3D visualisation layers. Integrate AI coding tools (e.g. Claude, Copilot) into daily development workflows for code generation, unit testing, and validation — this is an expected practice, not optional. Write and maintain automated test suites covering protocol adapters, data transformation logic, and integration endpoints. Collaborate with frontend Unity engineers and systems architects to define and implement API contracts (REST/WebSocket). Participate in code reviews, contribute to technical documentation, and support deployment through CI/CD pipelines. Troubleshoot field connectivity and protocol issues; work with OT/hardware teams on device commissioning and debugging. Must-Have Requirements Hand…