Yuvraj

Case studies

Case studies.
The decisions, not just the screenshots.

Four products, live and in production, all designed and engineered by Yuvraj Singh. Each write-up covers the problem they started from, the constraints that shaped them, the system that came out of those constraints, and every significant decision beside the alternative it beat.

No latency, cost or accuracy figures appear in these write-ups. None were measured on this work, so none are claimed.

Products, all live
04
Decisions recorded
13
Questions answered
17
Technologies named
12
01Multi-role writing SaaS

Xpress Writers

A customer-facing marketplace connecting clients with expert writers — real-time orders, role-based dashboards, and workflows a non-technical team can run.

  • JavaScript
  • TypeScript
  • React.js
  • Next.js
  • Node.js
  • Express.js
  • Socket.IO
3 decisions · 4 questionsRead the case study
02Enterprise procurement platform

Potato RFQ

B2B RFQ system for sourcing potatoes at scale — post requirements, collect competitive quotes, and move from supplier discovery to orders.

  • React
  • Next.js
  • Node.js
  • Multi-tenant workflows
3 decisions · 4 questionsRead the case study
03Marketplace · FDE · AI systems

Potato Bazaar

India-facing potato marketplace with live prices, trade connections, and production AI — RAG, MCP agents, and LLM workflows for operations staff.

  • React
  • Next.js
  • RAG
  • MCP
  • Embeddings
  • LLMs
4 decisions · 5 questionsRead the case study
04Foreign consultancy platform

Admivo

Study-abroad consultancy product — destination discovery, application workflows, and admin surfaces ops can run without engineering help.

  • React.js
  • Next.js
  • Node.js
  • Express.js
  • PostgreSQL
3 decisions · 4 questionsRead the case study

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The part of this work that transfers is not the stack — it is sitting with the people who run the process, and turning what they do by hand into something the software owns.