Backend Engineer

About Us: PT DMC Indonesia is developing an industrial-scale Smart Greenhouse System integrating IoT (LoRaWAN), Node-RED, MQTT, Supabase PostgreSQL, and AI (LLM + CNN). This system will automate greenhouse devices, monitor real-time plant conditions, and generate AI-based recommendations.

We are looking for a Backend Engineer to build the core technical backbone of this platform.

🎯 Job Description The Backend Engineer will develop APIs, automation logic, device-control services, and AI integrations for our Smart Greenhouse platform.

Key Responsibilities:

• Develop and maintain REST / WebSocket APIs for real-time sensor ingestion, device control (fans, vents, pumps, valves) via MQTT or Router API, and AI integration (LLM reasoning)
• Integrate data flows from Node-RED → MQTT → Supabase PostgreSQL.
• Build backend services for device control, alert engine & automation logic, and event-driven actions
• Implement authentication, rate limiting, error handling, and secure API patterns.
• Create middleware enabling two-way communication between IoT hardware, backend server, and web dashboard
• Provide API documentation for the frontend & AI engineering teams.
• Debug end-to-end issues (IoT → Node-RED → Backend → DB → Dashboard).
• Collaborate with the Database Engineer for optimal schema and query performance.

📌 Qualifications

• 1–3 years experience as a Backend Engineer.
• Strong proficiency in Node.js (JavaScript/TypeScript), and Python (FastAPI / Flask)
• Good understanding of REST API & WebSocket, MQTT / event-driven systems, Docker & container workflows, and Git version control
• Experience integrating with PostgreSQL, Supabase, InfluxDB, or any similar database.
• Familiar with IoT integrations, Node-RED or Home Assistant.
• Knowledge of distributed systems or microservices.
• Experience integrating AI inference or LLM-based services.
• Clear communication with English and problem-solving mindset.
• Able to work independently in a small, fast-moving team.
• Strong ownership of assigned modules.

Skills: MongoDB, PostgreSQL, C++, Java, Python, Microsoft SQL Server, MySQL, Node.js, PHP, Laravel