There are two honest reasons to build software: you love it enough to give it away, or a problem annoyed you enough that fixing it became a product. Everything below started as one or the other.
Product engineering
A drag-and-drop form builder in a Turborepo monorepo, with end-to-end tRPC type safety, shared Zod schemas, server-validated conditional logic, funnel analytics and custom JWT auth.
canvas
rule
show Seats when Plan is team
the server checks it again on submit
Retrieval
A RAG assistant over course subtitles that cites the exact module, lesson and timestamp. 1,955 transcript chunks indexed with local embeddings to stay off the rate limits, then HyDE to bridge spoken phrasing and LLM reranking of up to 10 candidates down to 5.
asked
why does my effect run twice?
answer
In development Strict Mode mounts, unmounts and mounts each component again, so a cleanup you forgot shows up at once.
Module 3 · Lesson 12 · 14:32
+ 4 more passages cited
Applied AI & domain modelling
Reconciles Razorpay settlement GST against GSTR-2B in four layers: detect, investigate, explain, act. Arithmetic produces every figure and an MCP tool-calling loop classifies what is left over. Any answer citing a record absent from the batch is flagged on screen before a person confirms it.
settlement · 31 Jul
fee ₹20.00 + GST ₹3.60
gstr-2b · jul 2026
no matching ITC
gstr-2b · aug 2026
ITC ₹3.60
gap · timing
fee settled in July, billed in August’s 2B
→ draft: GSTR-3B flag, claim in Aug
Identity & protocols
A self-hosted OpenID Connect provider built from scratch: Authorization Code flow with PKCE, SSO session cookies, RS256 signing and JWKS-based verification. Reading the spec was most of the work.
eyJhbGciOiJSUzI1NiIsImtpZCI6ImsxIn0.eyJpc3MiOiJodHRwczovL2N1c3RvbS1vaWRjLXByb3ZpZGVyLm9ucmVuZGVyLmNvbSIsInN1YiI6InByZWV0IiwiYXVkIjoicG9ydGZvbGlvIiwiZXhwIjoxNzg5MDAwMDAwfQ.Qm9vdHN0cmFwcGVkIGZyb20gdGhlIHNwZWMsIG5vdCBhIGxpYnJhcnk
header
{ "alg": "RS256", "kid": "k1" }payload
{ "iss": "https://custom-oidc-provider.onrender.com",
"sub": "preet",
"aud": "portfolio",
"exp": 1789000000 }signature
RS256 · checked against JWKS ✓
The real voyage of discovery consists not in seeking new landscapes, but in having new eyes.