Hey, 👋I'm Ayush Sagar.Full-Stack Engineer
I take your idea from design to deployment.React, Next.js & AI integrations — built clean, shipped fast.
Crafting code with purpose & precision
Who I Am
I am a passionate Full-Stack Engineer & SaaS Builder based in Mumbai, India. I don't just write code — I design, build, and launch complete web products. I focus on turning complex ideas into high-performance, production-ready applications, bridging the gap between visual design and solid, scalable engineering.
I specialize in the React/Next.js ecosystem, Node.js backends, and integrating intelligent AI workflows. I believe in clean architectures, pixel-perfect visual execution, and shipping fast, scalable software that drives real value.
Quick Facts
Successfully designed, built, and deployed scalable, production-ready platforms to production.
Worked with founders and product teams across multiple timezones to ship reliable code.
Experienced in integrating AI workflows, secure custom backend APIs, and rich vector database systems.
Featured digital & web creations
AeoIX - AI Brand Visibility Tracking
An AI Brand Visibility Tracking SaaS designed for SEO agencies and B2B teams, monitoring brand mentions and sentiment across LLMs and AI engines like ChatGPT, Gemini, Perplexity, and Grok.
Business Outcome:Helped the team track brand visibility across ChatGPT, Perplexity, and Gemini in real-time.
Cardiyo - Pokémon TCG Collection & Price Tracker
A comprehensive Pokémon TCG collection manager and market intelligence platform supporting multi-language catalogues (EN, DE, FR, JA), interactive card finder, camera-based scanning, live eBay NM price tracking, and portfolio valuation.
Business Outcome:Engineered a high-performance Turborepo monorepo with Next.js 16, Supabase auth/database, and real-time market pricing pipelines for global collectors.
EasyEquity - AI Market Intelligence Platform
An AI-powered financial news and market intelligence platform for traders and investors. Features real-time stock & crypto tickers, Google Gemini AI sentiment and sector analysis, custom watchlists, portfolio tracking, and Razorpay subscriptions.
Business Outcome:Engineered a full-stack platform with Next.js 16, Express backend, MongoDB, and integrated Google Gemini AI for automated daily financial digests and market sentiment tracking.
Furniflexx - E-Commerce Website
A full-stack e-commerce platform featuring secure Firebase/JWT authentication, a custom Node/Express REST API, and Redux-managed cart and user flows.
Business Outcome:End-to-end e-commerce experience with secure auth, cart, and API — zero third-party checkout dependencies.
Expense Tracker
An interactive personal finance dashboard with Redux state management, custom dark mode toggle, dynamic budget thresholds, and on-demand CSV exports.
Business Outcome:Built a local-first budgeting tool with 0ms database latency and complete private data safety.
QR Code Attendance System
A MERN stack application designed to streamline institutional attendance tracking via dynamic QR codes, featuring separate faculty and student portals.
Business Outcome:Reduced manual attendance tracking for 100+ students across faculty and student portals.
What I can build for you
Tailored development services designed to help clients launch and scale production-ready features quickly.
MVP Development
React/Next.js applications built from scratch. Turn your ideas into production-ready web apps rapidly with clean architecture.
SaaS Feature Development
Scale existing products. Integrate interactive dashboards, complex global state management, and modern user flows.
AI Integration
LLM workflows, custom RAG pipelines, and OpenAI/Claude API integrations to make your product intelligent and automated.
Frontend Builds
Translate Figma designs or specs into pixel-perfect, accessible, highly interactive, and lightning-fast React interfaces.
Tech Stack & Tools
My development toolkit and the technologies I use to build robust full-stack applications.