November 20, 2025•5 min read
Building a Scalable Multi-Channel Notification System on AWS
Architecting a fault-tolerant, event-driven notification pipeline using AWS Lambda, SQS, and EventBridge to handle millions of triggers for a global client.
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Kasoor — Prateek KuhadHi, this is Vishawjeet
Engineer building
systems for 100s
to 1000s of users
please put the developer back 😭
he is already tired of bugs
he is already tired of bugs
My latest work
Fresh
BoutiqueAI
Founder
03/2026 - Present
- AI vision engine auto-extracts color, fabric, embroidery & occasion from phone photos — zero manual entry
- Builds customer preference profiles from every sale — remembers who likes what
- Curated WhatsApp sharing: matches new arrivals to the customers most likely to buy
- Free, auto-categorized e-commerce storefront generated instantly — no tech skills needed
- Replaces scattered gallery chaos with a searchable, organized product catalog
Explore: https://boutiqueAI.in
PrepWai
Solo project
12/2024 - 03/2025
- AI-tailored interviews dynamically adapted to match the target job description
- Real-time interview simulation powered by WebSockets for seamless live interaction
- Retrieval-Augmented Generation (RAG) using Pinecone for accurate, context-aware responses
- Instant feedback, performance analytics, and structured post-interview evaluation
- Token-based credit system with Razorpay payment integration
- Hybrid database architecture combining PostgreSQL and MongoDB
Work Experience
Instep Technologies
Full stack intern
06/2025 — 02/2026
- Developed cross-platform applications using Flutter, Next.js, Express, and AWS.
- Implemented caching strategies with Redis, improving API response times by ~40%.
- Optimized application workflows and async calls, reducing overall app loading time by ~50%.
- Architected cloud-native notifications using AWS Lambda, EventBridge, EC2, SQS, and Firebase.
- Leveraged agentic AI workflows to automate module development, reducing manual effort by 25%.
Writings
March 22, 2025•5 min read
Behind the Architecture of PrepWAI: Designing an End-to-End AI Interview Platform
How I built a fully automated interview pipeline using Dual Agent architecture, Vector Search, and a multi-database strategy to simulate real-world technical interviews.