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Sachin Rajkumar Saini
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Sachin Rajkumar Saini

Full-Stack Product Engineer

sainisachinrajkumar@gmail.com · +91 9033771954 · Gujarat, India · sachinrajkumarsaini.com · linkedin.com/in/sachinrajkumarsaini · github.com/SachinRajkumarSaini · twitter.com/SachinSaini432

Professional Summary

Full-stack product engineer with 4+ years building and shipping production web and mobile software. Delivered 45 products across FoodTech, FinTech, HealthTech, EdTech, logistics and AI, owning architecture, backend APIs, databases, payments, real-time systems, deployment and release engineering. Comfortable taking a vague problem through to a maintained system in production.

Technical Skills

Frontend:
TypeScript, React, Next.js, JavaScript, Tailwind CSS, Redux, Plotly.js
Mobile:
React Native, Expo, CodePush
Backend & APIs:
Node.js, Strapi, Socket.io, Python, WebRTC
Databases & Security:
PostgreSQL, MongoDB, SQL, Data Analytics, HIPAA Compliance
Cloud & DevOps:
AWS, Vercel, CDN, Azure
AI, Payments & Integrations:
OpenAI, Stripe, AI/ML, Google Maps, MCP, Microsoft Copilot Studio, Power Platform, OCR, Razorpay, PayPal, Financial APIs, WhatsApp API, CometChat, Video Processing, Google Places, Zoho CRM

Professional Experience

Product Engineer · Full-Stack Developer

Independent Product Development  |  2022 – Present

Designed and shipped production web and mobile products across FoodTech, FinTech, HealthTech, EdTech, logistics and AI. Owned architecture, frontend, backend APIs, databases, payments, real-time systems, deployment and release engineering.

  • Architected and deployed production applications used across 10+ countries with multi-language support
  • Built real-time communication systems with WebRTC and Socket.io for live consultation products
  • Integrated Razorpay, Stripe, PayPal and Apple Pay, including subscription billing
  • Shipped 100+ app releases to the App Store and Play Store, with over-the-air updates via CodePush
  • Built AI features on OpenAI, including RAG chatbots and OCR document processing

Selected Projects

  • Birla Uttam Cement | 500+ daily users | mangalamcement.com

    Enterprise Digital Stack - Mangalam Cement

    Stack: React Native, TypeScript, Node.js, React

  • ImaginAI | 1M+ documents | imaginai.in

    Invoice-to-Tally Automation

    Stack: React Native, Expo, Node.js, OpenAI, OCR

  • Humwork.ai | <30s match time | humwork.ai

    Human Experts for AI Agents

    Stack: React Native, Next.js, Node.js, TypeScript, MCP

  • OOHK | 31 versions | orderonline.hk

    Food Ordering Platform - Hong Kong

    Stack: React Native, TypeScript, PostgreSQL, Stripe, PayPal

  • Shiplog | useshiplog.com

    Agentic Customer Intelligence

    Stack: Next.js, TypeScript, Node.js, OpenAI

  • KhataBhai | 500+ businesses | khatabhai.com

    WhatsApp AI Business Assistant

    Stack: Next.js, Node.js, WhatsApp API, OpenAI, Vercel

  • PandSecure Health | 10+ facilities | pandsecure.com

    Healthcare Security Platform

    Stack: React Native, Node.js, HIPAA Compliance, AWS

  • Aurom | 2K+ users | Live on iOS & Android

    Mental Wellness Platform

    Stack: React Native, Node.js, Socket.io, WebRTC

Education

B.Tech, Information Technology

Poornima College of Engineering, Jaipur  |  2020 – 2024