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SELECTED ARCHITECTURES & CASE STUDIES (4)

ENGINEERINGARCHIVE

Detailed case studies and technical architectures engineered by Shubham Mandal. Spanning scalable Next.js platforms, high-throughput REST APIs, and Gemini AI pipelines.

Quick Commerce for Construction & Building Material
01 // INSTOKK2026 · Part-time

Quick Commerce for Construction & Building Material

Engineered an on-demand hyperlocal delivery infrastructure connecting homeowners, professionals, and contractors to get items in under 30 minutes. Features real-time order lifecycle tracking, inventory sync, and scalable APIs.

  • Real-time dispatch and driver tracking telemetry architecture
  • High-concurrency order placement and secure payment processing
  • Dynamic inventory management and geolocation-based vendor routing
Next.jsNode.jsExpress.jsMongoDBTailwind CSSZustandCloudinaryRazorpay API
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AI-Powered Career Intelligence & Mock Interview Engine
02 // QRYV.AI2024 · Independent

AI-Powered Career Intelligence & Mock Interview Engine

A comprehensive career development platform featuring automated AI mock interviews, contextual resume & cover letter generation, and an interactive career coaching chatbot.

  • AI-driven mock interview simulation with real-time feedback & scoring
  • Dynamic tailored resume generation based on profile target roles
  • State management with persistent user analytics dashboards
Next.jsTypeScriptTailwind CSSExpress.jsMongoDBREST APIs
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Intelligent Candidate Evaluation & Interview Reporter
03 // INTERV.AI2024 · Independent

Intelligent Candidate Evaluation & Interview Reporter

Automated interview reporting platform that analyzes job specifications and candidate backgrounds to generate technical/behavioral question sets, skill gap matrices, and dynamic PDF resumes.

  • Gemini API structured prompt pipelines for technical & behavioral analysis
  • Dynamic PDF resume compilation using server-side Puppeteer and HTML templates
  • Multi-modal input support: resume PDF parsing + self-description evaluation
React.jsNode.jsGemini APIPuppeteerMongoDBExpress.js
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Farm-Fresh Grocery E-Commerce & Inventory Management
04 // VEGGIEGRAM2025 · Independent

Farm-Fresh Grocery E-Commerce & Inventory Management

End-to-end e-commerce grocery engine delivering friction-free browsing, instant cart calculations, secure Razorpay checkout integration, and an administrative control panel for real-time inventory management.

  • Full e-commerce lifecycle: user authentication, cart persistence & order tracking
  • Secure webhook-verified payment processing with Razorpay gateway API
  • Dedicated administrator dashboard for live inventory adjustments and order analytics
React.jsNode.jsExpress.jsMongoDBRazorpay APITailwind CSS
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