Senior Systems Engineer — Open Digital Platform & OT Integration

Government Technology Agency; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

GovTech in Singapore is seeking a Senior / Systems Engineer to develop and maintain the Open Digital Platform (ODP), enabling integration between enterprise apps, smart buildings, and OT. You will design scalable middleware, APIs, messaging, and telemetry pipelines while ensuring reliability and security.

Responsibilities include designing REST APIs, event-driven services, protocol adapters (REST, MQTT, OPC UA, BACnet, RabbitMQ/AMQP, Modbus), and building reusable integration components.

Qualifications

• Degree in Computer Science, Computer Engineering or equivalent.
• 2+ years backend software engineering experience.
• Strong Java and Spring Boot experience.
• Experience working with RabbitMQ.
• Experience with containerization technologies (Docker) and orchestration platforms (Kubernetes).
• Linux development experience.
• Git and CI/CD workflows.
• Experience working with various communication protocols (Modbus, BACnet, OPC-UA, MQTT, REST API).
• Experience with PLCs or IIoT is a plus

Responsibilities

• Design, develop and maintain backend services and microservices.
• Develop middleware integrating enterprise and OT systems.
• Build scalable REST APIs and event-driven services.
• Develop reusable integration components.
• Participate in architecture and code reviews.
• Design and maintain ODP integration services.
• Develop protocol adapters for REST APIs, MQTT, OPC UA, BACnet, RabbitMQ/AMQP and Modbus.
• Develop data transformation, validation and routing services.
• Design event-driven architectures.
• Implement asynchronous workflows.
• Implement retries, fault handling and message reliability.
• Develop monitoring and observability.
• Troubleshoot distributed services.
• Support production incidents and root cause analysis.
• Improve scalability and performance.
• Develop Dockerized applications.
• Support Kubernetes deployments.
• Maintain CI/CD pipelines.
• Manage software releases.
• Produce software design documents.
• Maintain API documentation.
• Maintain Interface Control Documents (ICDs).
• Produce operational runbooks.

Skills

Backend software engineering

Java

Spring Boot

RabbitMQ

Git & CI/CD workflows

REST APIs

MQTT

OPC-UA

Modbus

BACnet

Linux development

Education

Degree in Computer Science or Computer Engineering

Tools

Docker

Kubernetes

RabbitMQ

Git

CI/CD pipelines

Job description

GovTech in Singapore is seeking a Senior / Systems Engineer to develop and maintain the Open Digital Platform (ODP), enabling integration between enterprise apps, smart buildings, and OT. You will design scalable middleware, APIs, messaging, and telemetry pipelines while ensuring reliability and security.

Responsibilities include designing REST APIs, event-driven services, protocol adapters (REST, MQTT, OPC UA, BACnet, RabbitMQ/AMQP, Modbus), and building reusable integration components.