Backend Developer

Role Overview

OBS Digital Services is building next-generation platforms, including multi-sided marketplaces (food delivery and booking systems) and AI-powered media processing applications. We are seeking a strong Backend & AI Engineer to architect our core infrastructure. Working from our Kanchrapara office, you will design robust APIs, handle complex database schemas, and seamlessly integrate Generative AI capabilities into our products.

Responsibilities

• API Architecture: Design, build, and maintain high-performance RESTful APIs using Python and FastAPI.
• Database Management: Architect and manage robust database schemas (PostgreSQL/MySQL), ensuring data integrity and handling concurrency.
• AI Integration: Build and optimize pipelines connecting to Large Language Models (LLMs like Gemini, Claude, or local models via Ollama) for text generation, semantic extraction, and media processing.
• Background Processing: Manage asynchronous task queues (e.g., Celery, Redis) to handle long-running operations.
• DevOps & Security: Implement secure authentication (JWT, RBAC), manage Docker containers, and handle server deployments.

Requirements

• Proven professional experience writing clean, scalable, and type-hinted Python code.
• Deep understanding of FastAPI, Pydantic, and modern async programming.
• Experience handling complex application states, rate-limiting, and third-party API integrations (e.g., payment gateways, AWS/GCP services).
• Hands-on experience working with AI endpoints, prompt engineering, and processing JSON outputs from language models.

Skills

• Python
• FastAPI
• PostgreSQL
• Docker
• LLMs