Backend Developer

Backend Developer

Company: Kairox AI Tech Pvt. Ltd.
Job Type: Full-time
Location: Chennai, Tamil Nadu / Hybrid
Experience: 1–3 years preferred

Job Description

Kairox AI Tech is looking for a Backend Developer to build scalable, secure and reliable backend systems that power our AI products, business applications and enterprise platforms.

You will work closely with our AI, frontend and product teams to develop APIs, databases, integrations and backend services that support real-world business operations.

Key Responsibilities

• Design, develop and maintain robust backend applications and REST APIs.
• Build scalable backend services using Python and FastAPI.
• Design and manage relational databases and data models.
• Develop APIs for web and mobile applications.
• Integrate third-party APIs, AI services and external business systems.
• Implement authentication, authorization and role-based access control.
• Build background jobs, automation workflows and asynchronous processes.
• Work with PostgreSQL, Redis and database optimization.
• Develop integrations with CRM, ERP, payment, communication and other business platforms.
• Write clean, maintainable and well-documented code.
• Debug issues, optimize performance and improve system reliability.
• Work with Git/GitHub and participate in code reviews.
• Deploy and maintain backend services using Docker and AWS.
• Collaborate with frontend developers, AI engineers and product teams to deliver complete features.

Required Skills

• Strong knowledge of Python.
• Experience with FastAPI, Flask or Django.
• Strong understanding of REST APIs and backend architecture.
• Good knowledge of PostgreSQL or other SQL databases.
• Understanding of authentication, authorization and API security.
• Experience with Git/GitHub.
• Knowledge of JSON, webhooks and third-party API integrations.
• Understanding of asynchronous programming and background jobs.
• Strong problem-solving and debugging skills.

Good to Have

• Experience with Redis, Celery or similar task queues.
• Docker and AWS experience.
• Experience building production-grade APIs.
• Knowledge of microservices architecture.
• Experience integrating AI/LLM APIs.
• Experience with CRM/ERP systems.
• Understanding of CI/CD and GitHub Actions.
• Familiarity with React/TypeScript is a plus.

What We're Looking For

We are looking for a developer who can take ownership of backend systems and build production-ready software, not just basic APIs.

You should be comfortable working with changing requirements, researching solutions independently and collaborating with AI and frontend developers to turn business requirements into reliable software.

What You Will Work On

You may work on:

• Enterprise backend platforms
• AI-powered applications
• CRM and business automation systems
• ERP integrations
• AI agent infrastructure
• REST APIs and microservices
• Database and inventory systems
• Authentication and user management
• Third-party integrations
• Real-time business applications

Why Join Kairox?

At Kairox AI Tech, you will work on real-world AI and enterprise software projects and have the opportunity to work closely with AI engineers, product developers and business teams.

To Apply: Submit your CV along with your GitHub/portfolio and details of relevant backend projects you have worked on.

Pay: ₹15,000.00 - ₹30,000.00 per month

Benefits:

• Paid time off

Work Location: In person