About the Role:

We are looking for a Backend Developer experienced in Node.js, MongoDB and Redis to develop scalable APIs, manage real-time IoT data, optimise large datasets and support production infrastructure.

Key Responsibilities:
- Develop and maintain REST APIs using Node.js/Express.
- Implement authentication, access control, rate limiting and API usage tracking.
- Design and optimise MongoDB aggregation pipelines, indexes and queries for large datasets.
- Build real-time IoT data ingestion using MQTT/Mosquitto.
- Use Redis for caching, rate limiting and usage tracking.
- Manage Ubuntu servers, Nginx, SSL/TLS, Certbot and systemd services.
- Develop cron-based data processing, aggregation and anomaly-detection jobs.
- Integrate Razorpay subscriptions, webhooks and B2B billing.
- Troubleshoot production issues using logs, explain() and other debugging tools.
- Work with Git and follow collaborative development practices.

Required Skills:
- 2+ years backend development experience.
- Strong Node.js/Express and REST API knowledge.
- Strong MongoDB experience, including aggregation,



indexing and query optimisation.
- Experience with Redis.
- Knowledge of MQTT/IoT systems.
- Hands-on Linux/Ubuntu server administration.
- Working knowledge of Nginx, TLS/Certbot and systemd.
- Understanding of API security and authentication.
- Robust debugging and problem-solving skills.

Nice to Have:
- Experience with IoT, environmental or sensor data platforms.
- Razorpay/payment gateway experience.
- AWS, OCI or other cloud infrastructure experience.
- Experience with ESP32, Mosquitto or geospatial data.

Experience: 2+ Years
Project: www.aqi.in
Employment Type: Full-time
Type of Work: In-Office
Working Days: Monday-Saturday

Pay: ₹30,000.00 - ₹35,000.00 per month

Benefits:
- Paid sick time

Ability to commute/relocate:
- Delhi: Reliably commute or planning to relocate before starting work (Required)

Education:
- Bachelor's (Preferred)

Experience:
- MongoDB: 2 years (Requi

📌 Backend Developer – Node.js (Delhi)
🏢 Prana Air Private
📍 Delhi