Jai Kumar Rajput@jai_rajput303
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10+ years of experience
About me
AI & Machine Learning | Full-Stack Engineer | Building intelligent business systems. A results-oriented developer with 10+ years of experience delivering innovative solutions across 20+ successful projects for clients in over 15 countries. Highly skilled in AI, serverless architecture, web application, mobile app development, and cloud deployment strategies. Extensive experience collaborating with international clients and managing projects across the entire development lifecycle. Key Skills & Experience: ➞ AI & Vector Databases: Utilized Open AI models (GPT-3.5 & 4) for tasks like generation and semantic search. Implemented fine-tuning for transfer learning and leveraged vector databases like Pinecone for efficient storage and retrieval of vector embeddings. ➞ Serverless Development: Built scalable serverless architectures using frameworks like Jets. Proficient in AWS services like Lambda, API Gateway, CloudFormation, and others. ➞ Full-Stack Development: Adept in both front-end and back-end development. Highly skilled in Ruby on Rails with SQL and NoSQL databases (MongoDB, DynamoDB). Experienced with Node.js development and various UI frameworks (ReactJS, HTML, CSS, JavaScript libraries like jQuery, Bootstrap, Tailwind UI). ➞ Application Deployment: Experience in building robust CI/CD pipelines using Docker, Jenkins, GitHub, and Kubernetes for automated deployment and scaling. Expertise in PaaS deployment platforms (CircleCI, Heroku) and multiple cloud providers (AWS, Google Cloud, etc.). ➞ Mobile App Development (iOS & Android) with Rails Hotwire Native: Skilled in building cross-platform mobile apps using Hotwire Native and Ruby on Rails. Proficient in integrating native features for iOS and Android, creating seamless user experiences. Experienced in managing app data synchronization, push notifications, and working with APIs to deliver fast, efficient, and reliable mobile solutions.
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Arcfeed
Adds a demo route (/api/demo/402-flow) and an info endpoint to illustrate an HTTP 402 payment flow in-app. A first request (no X-Payment-Tx) returns a 402 JSON with payment.instructions, receiver, amount, and a demoTxHash; repeating the request with X-Payment-Tx: demo-payment-0x1234567890abcdef returns mock Aave yields data and paymentVerified: true. Includes a runnable helper script demo-402.sh that defaults to HTTPS, follows redirects, accepts an optional API_KEY env var (X-API-Key), and pretty-prints JSON when jq is available — use HOST and API_KEY to point at a deployed host. Intended for live demos and documentation to show the exact UX of requiring payment proof, how to present the 402 payload, and the transition to successful access. Note: ensure the backend API_KEY_SECRET matches the frontend VITE_API_KEY (or supply API_KEY when running the script).
24 Jan 2026
