Chetan S.

𝙄 𝙗𝙪𝙞𝙡𝙙 𝘼𝙄-𝙥𝙤𝙬𝙚𝙧𝙚𝙙 𝙖𝙥𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣𝙨, 𝙍𝘼𝙂 𝙨𝙮𝙨𝙩𝙚𝙢𝙨, 𝘼𝙄 𝙖𝙜𝙚𝙣𝙩𝙨, 𝙖𝙣𝙙 𝙎𝙖𝙖𝙎 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨 𝙩𝙝𝙖𝙩 𝙨𝙤𝙡𝙫𝙚 𝙧𝙚𝙖𝙡 𝙗𝙪𝙨𝙞𝙣𝙚𝙨𝙨 𝙥𝙧𝙤𝙗𝙡𝙚𝙢𝙨. I'm Chetan, an AI Engineer and Senior Full-Stack Developer with 12+ years of development experience. I've worked on long-term AI development projects, LLM integrations, document-based chatbots, and full-stack applications, including a long-term AI development engagement worth $35,000 on Upwork. 𝙒𝙃𝘼𝙏 𝙄 𝘾𝘼𝙉 𝙃𝙀𝙇𝙋 𝙔𝙊𝙐 𝘽𝙐𝙄𝙇𝘿 ======================== 1. 𝙍𝘼𝙂 𝙎𝙮𝙨𝙩𝙚𝙢𝙨 & 𝘼𝙄 𝘾𝙝𝙖𝙩𝙗𝙤𝙩𝙨 Chatbots trained on documents, websites, and private knowledge bases Document ingestion, embeddings, semantic search, and retrieval optimization Vector database integration and RAG pipeline development AI assistants for customer support, research, and internal business use 2. 𝙇𝙇𝙈 𝘼𝙥𝙥𝙡𝙞𝙘𝙖𝙩𝙞𝙤𝙣𝙨 & 𝘼𝙄 𝘼𝙜𝙚𝙣𝙩𝙨 OpenAI API integration and structured LLM outputs AI agents with tool calling and multi-step workflows LangChain and LangGraph development AI-powered business workflows and third-party API integrations AI features for existing SaaS products 3. 𝙋𝙮𝙩𝙝𝙤𝙣 𝘽𝙖𝙘𝙠𝙚𝙣𝙙 & 𝙁𝙪𝙡𝙡-𝙎𝙩𝙖𝙘𝙠 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 Python, FastAPI, Flask, and Django React, Next.js, Angular, Node.js, and NestJS PostgreSQL, MongoDB, MySQL, and vector databases REST APIs, webhooks, and cloud application deployment 𝑹𝑬𝑳𝑬𝑽𝑨𝑵𝑻 𝑷𝑹𝑶𝑱𝑬𝑪𝑻 𝑬𝑿𝑷𝑬𝑹𝑰𝑬𝑵𝑪𝑬 ============================== 1. 𝐃𝐨𝐜𝐬𝐁𝐨𝐭 𝐀𝐈 | 𝐀𝐈 𝐂𝐡𝐚𝐭𝐛𝐨𝐭 & 𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 Worked on a SaaS chatbot platform that supports document and website ingestion, custom knowledge-base assistants, multiple embedding models, enhanced retrieval using Reciprocal Rank Fusion (RRF), and API integrations. Tech: Python, FastAPI, LangChain, OpenAI, Weaviate, ChromaDB, and Firestore. 2. 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐂𝐑𝐌 | 𝐀𝐭𝐦𝐨𝐬𝐀𝐈 AI features for email drafting, SMS replies, appointment scheduling, reminders, image generation, and knowledge-base chat. 3. 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡 & 𝐒𝐞𝐚𝐫𝐜𝐡 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 | 𝐉𝐨𝐮𝐫𝐧𝐚𝐥𝐢𝐬𝐭 𝐋𝐋𝐌 A RAG-based application combining research papers, financial data, podcasts, uploaded documents, and web search. 𝑯𝑶𝑾 𝑰 𝑾𝑶𝑹𝑲 =========== I focus on understanding your requirements first, choosing a practical technical approach, and building solutions that are maintainable and ready for real-world use. I can help with architecture, development, integrations, debugging, and improving existing applications. Whether you're building a new AI product or adding AI capabilities to an existing platform, share what you're trying to achieve and where you're facing challenges. We can discuss the right approach here on Upwork. Best regards, Chetan Sharma. 𝐊𝐄𝐘𝐖𝐎𝐑𝐃𝐒 #AIEngineer #ArtificialIntelligence #GenerativeAI #LLM #LargeLanguageModels #RAG #RetrievalAugmentedGeneration #AIAgents #AgenticAI #AIChatbot #ChatbotDevelopment #OpenAI #OpenAIAPI #GPT #GPT4 #PromptEngineering #LangChain #LangGraph #LlamaIndex #HuggingFace #MachineLearning #DeepLearning #NLP #NaturalLanguageProcessing #SemanticSearch #VectorDatabase #VectorSearch #Pinecone #ChromaDB #Weaviate #Embeddings #RAGPipeline #KnowledgeBase #AIApplicationDevelopment #AIIntegration #AIConsultant #Python #FastAPI #Django #Flask #RESTAPI #APIIntegration #BackendDevelopment #FullStackDeveloper #ReactJS #NextJS #NodeJS #TypeScript #JavaScript #PostgreSQL #MongoDB #MySQL #DataEngineering #DocumentProcessing #DocumentAI #AIWorkflowAutomation #N8N #WorkflowAutomation #ToolCalling #FunctionCalling #MultiAgentSystems #AIResearch #SaaSDevelopment #CloudDeployment #AWS #Docker #LLMOps #MLOps #AIProductDevelopment #EnterpriseAI #CustomAI