Kartik S.

100% Job Success | 6+ years building production software | Enterprise AI experience Built an enterprise AI research platform used by thousands of consultants. Hired twice by a real estate team to build AI voice agents that qualify leads and schedule showings. Send me an invite or message, I'll give you a free Loom audit showing exactly how I'd build your AI voice agent, AI agent or AI product. That's my promise. I help startups and growing businesses launch AI products and automate their workflows through AI voice agents, RAG systems and full-stack AI apps. Whether you're losing leads because nobody answers the phone fast enough, sitting on documents your team can't search, or trying to get an AI SaaS from prototype to launch, I build production AI systems that drive booked calls and daily usage, not demos that never ship. AI THAT PERFORMS Voice agents and chatbots that qualify leads, answer questions and book appointments. Built with Vapi, Retell, ElevenLabs and Twilio, with prompts tuned so conversations sound natural. AI THAT SCALES RAG and agent systems built for real users. For a Swedish enterprise group I built data pipelines, RAG retrieval, LLM analysis and scoring with supporting sources. It's now used daily by thousands of consultants. FULL-STACK, END TO END React/Next.js frontend, Python/FastAPI or Node.js backend, LLM integrations and deployment on AWS or GCP. As founding AI engineer at an AI learning startup, I took the product from early stage to a live platform with real-time AI instructors. DATA-DRIVEN Every build has clear milestones and gets tested against real calls, documents and edge cases before launch. A real estate client hired me twice to build and improve AI voice agents for lead qualification and showing scheduling. HAPPY CLIENTS ★★★★★ "Kartik is an outstanding AI developer. He took our AI-powered SaaS features from idea to production with very little hand-holding, working across the React/ Next.js frontend, the Python/Node.js backend, LLM integrations, and deployment. He understood our product requirements quickly, proposed practical solutions, and owned every feature through to launch. His code is clean and maintainable, and he's excellent at debugging and improving existing AI workflows. Communication was clear and proactive throughout. We'd happily work with him again long-term. Highly recommended for anyone looking for a full-stack AI developer." ★★★★★ "This was my second time hiring Kartik, and he's become my go-to AI developer. There was one part of our AI voice agent that needed improvement, and he understood exactly what we wanted right away. He made the changes quickly and the agent is working much better now. Kartik communicates clearly, explains things in simple terms, and is very responsive. If you're looking for an AI developer who understands both the Upwork Whales · Personal plan for kartik sharma 8 tech and the business side, I'd highly recommend him. Will definitely work with him again." ★★★★★ "Kartik did an excellent job developing our AI voice agent for real estate lead qualification and showing scheduling. He understood the requirements quickly, implemented the workflow effectively, and delivered a reliable solution. Communication was smooth throughout the project, and he was responsive to feedback and changes. I would definitely recommend Kartik for AI automation and voice agent development projects." ★★★★★ "Kartik was great to work with. He understood the requirements quickly, communicated well, and delivered everything as expected. He's a reliable AI automation expert and was very professional throughout the project. Highly recommended!" CORE SKILLS AI Developer, Full-Stack AI Developer, AI Engineer, AI Voice Agent, Voice AI, AI Receptionist, Vapi, Retell AI, ElevenLabs, Twilio, AI Chatbot, WhatsApp Chatbot, Conversational AI, AI Agent Development, Multi-Agent Systems, LangChain, LangGraph, Model Context Protocol, RAG, Retrieval Augmented Generation, Vector Database, Pinecone, Semantic Search, Document AI, OCR, LLM Integration, OpenAI API, Claude, Generative AI, AI SaaS, MVP Development, Python, FastAPI, Node.js, React, Next.js, TypeScript, PostgreSQL, n8n, AI Automation