Backend Systems Engineer - IOT/Smart City

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
• Hands-on experience with OPC-UA, MODBUS, and MQTT - protocol implementation, not just conceptual familiarity.
• Proficiency in backend development (Python, Node.js, Go, or Java - at least one).
• Active use of AI tools for coding, testing, and validation in prior roles or personal projects.
• Experience writing integration and unit tests; familiarity with test automation frameworks.
• Comfortable working with message brokers (MQTT brokers, Kafka, or similar) and time-series or event-driven data.
• Good to Have
• Exposure to digital twin platforms or industrial IoT stacks.
• Familiarity with OT security considerations (network segmentation, secure protocol configuration).
• Experience with containerisation (Docker/Kubernetes) and CI/CD tooling.
• Knowledge of BACnet, DNP3, or other industrial protocols.

Requirements

• 2-5 years in backend or systems software engineering, with at least some exposure to OT/IoT environments. Degree in Computer Science, Engineering, or equivalent practical experience.
• WHAT'S ON OFFER
• You will be remunerated with an excellent base salary and entitled to attractive company benefits. Additionally, you will get the opportunity to enjoy a fun and collaborative work environment, alongside a strong career progression.
• To submit your application, please apply online or email your UPDATED CV in Microsoft Word format to keerthana@aven-sys.com. Your interest will be treated with strict confidentiality.
• CONSULTANT DETAILS
• Consultant Name: Keerthana Ramakrishnan
• Avensys Consulting Pte Ltd
• EA License 12C5759
• Privacy Statement: Data collected will be used for recruitment purposes only. Personal data provided will be used strictly in accordance with the relevant data protection law and Avensys' privacy policy.

Additional Information

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.

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