Arun K.

Senior Python Backend Engineer | FastAPI, Django, AI Agents & SaaS

Senior Python Backend Engineer with 5+ years of experience building production-ready backend systems, APIs, and AI-powered features for SaaS applications. I help startups and businesses turn complex requirements into reliable, scalable, and maintainable software. I specialize in: • Backend Architecture & APIs: FastAPI/Django services, REST API development, PostgreSQL, API integrations, Docker and AWS • AI & LLM Integration: OpenAI, Claude/Anthropic, LangChain, RAG pipelines, and AI agent workflows integrated into real products • Full-Stack Development: React and Next.js when a project requires both backend and frontend development Recent work: • Built an AI-powered SaaS platform for an entertainment production company using Django, OpenAI, MCP, agent workflows, and business automation. • Built tax, exemption, and payment logic for a live e-commerce platform using Django + Next.js. • Built backend APIs and automated data-extraction pipelines using FastAPI, PostgreSQL, Playwright, and Selenium. I focus on building production-ready systems, not just prototypes. I care about clean architecture, reliable APIs, maintainable code, and AI workflows that work properly in real-world applications. If you need an experienced Python backend engineer who can own API development, backend architecture, and AI/agent integration, let's discuss what you're building.