Fullstack Developer

Qtloads Tech & Transit; Delhi Cantonment; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Qtloads Tech & Transit is seeking an senior backend engineer to design, build, and maintain robust backend services in a microservice environment. You will work with Node.js, Python (FastAPI), and PHP, focusing on clean boundaries and scalable architecture.

You will model and optimize MySQL/PostgreSQL schemas, while supporting real-time data ingestion and event-driven workflows. Collaboration with product, DevOps, and data teams is essential, along with code reviews and continuous improvement.

Qualifications

• 13 years of backend software engineering experience.
• Strong proficiency with Node.js, Python (FastAPI) and PHP.
• Familiarity with MySQL and PostgreSQL databases.
• MongoDB document modeling for telemetry data is a plus.

Responsibilities

• Design, build, and maintain backend services.
• Collaborate on microservice architecture and maintain clean boundaries.
• Work with relational databases focusing on schema design and indexing.
• Support real-time data ingestion pipelines and event-driven systems.
• Contribute to messaging workflows and production troubleshooting.
• Participate in code reviews and uphold coding standards.

Skills

Node.js

Python (FastAPI)

PHP

MySQL

PostgreSQL

MongoDB

MQTT

RabbitMQ

Distributed systems

Code reviews

Tools

Docker

AWS

Job description

Role & responsibilities

• Design, build, and maintain backend services using Node.js, FastAPI (Python), and PHP
• Collaborate on microservice architecture, ensuring clean boundaries and maintainability
• Work with MySQL and PostgreSQL databases, focusing on schema design, query optimization, and indexing
• Support real-time communication and data ingestion pipelines
• Contribute to event-driven systems and messaging workflows
• Debug and troubleshoot issues in production environments with guidance from senior engineers
• Participate in code reviews, learn best practices, and continuously improve coding standards
• Collaborate with product, DevOps, and data teams to deliver end-to-end solutions

Preferred candidate profile

• 13 years of backend software engineering experience
• Comfortable with Node.js, Python (FastAPI), and PHP
• Familiarity with relational databases (MySQL, PostgreSQL)
• MongoDB document modeling for semi-structured/telemetry data
• MQTT lightweight pub/sub messaging for device/IoT telemetry
• RabbitMQ reliable async messaging and task/event queuing between services
• Basic understanding of distributed systems concepts (caching, queues, consistency)
• Strong problem-solving mindset and eagerness to learn new technologies

Good to Have

• Exposure to transportation, IoT, or fleet management systems
• Familiarity with GPS data processing or real-time data pipelines
• Experience with cloud platforms (AWS) and containerization (Docker)
• Interest in event-driven architecture and scalable system design