Hi, I'm Prateek
Fullstack Engineer with 11+ years of experience building scalable web and mobile applications using React, React Native, Next.js, Python/FastAPI and Node.js across fintech, healthcare, e-commerce and AI. Led teams of 8+ developers and architected 20+ production applications. Strong in frontend architecture, backend API development, scalable system design, and high-performance full-stack products.
Work Experience
Skills
Notable projects
Selected production projects across AI, real-time systems, and frontend architecture leadership.
Jiffy.com AI Design Lab
Owned frontend architecture for an AI-powered apparel customization platform using React, Tailwind, React Aria and FabricJS. Delivered real-time image manipulation flows with sub-second load times and a scalable design system that cut feature delivery time by ~25%.
Real-time Voice AI
Built a React Native + Pipecat + OpenAI Realtime API voice agent achieving sub-200ms speech-to-speech latency, deployed and scaled on VPS with Docker and Nginx.
LLM Mental Health Chat
Shipped a context-aware, session-persistent conversational app on React Native with OpenAI API and an Express backend handling auth, memory and streaming.
High-impact work themes
A quick view of the areas where I have delivered consistent outcomes: frontend architecture, real-time AI systems, engineering leadership, and process improvement.
Team Leadership and Delivery
Dekeo Pvt. Ltd. (Jiffy.com)
Led a cross-functional team of 10 engineers, driving code reviews, engineering standards, sprint execution, and collaboration with Product.
Real-time AI Systems
Toptal Client Engagements
Delivered voice AI products with sub-200ms speech-to-speech pipelines and production reliability, combining React Native, Pipecat, and the OpenAI Realtime API on Docker + Nginx.
Scalable Frontend Architecture
Squint Metrics, Nagarro, Toptal, Dekeo
Architected frontend systems for healthcare, sports betting, e-commerce and design-tech products with a focus on maintainability, performance, and real-time user experiences.
Fullstack & Backend Delivery
Toptal Contract Engagements
Built backend services and REST APIs using Python/FastAPI and Express.js — request handling, validation, authentication and real-time communication — across 20+ production applications in fintech, healthcare, legal and gaming.
Get in Touch
Open to discussing frontend architecture, React/React Native consulting, and engineering leadership opportunities. Reach out on LinkedIn or send an email at prateekyadav2405@gmail.com.