Preet Jain

Engineer · goes where the problem is

Open to workResume

About

I graze constantly. Mostly YouTube, on more or less anything, on the theory that a wider base is always worth having. I build the same way: retrieval systems, my own sign-in provider, a small CSS compiler, each picked for the part I didn’t know yet.
What I keep circling back to is people. Why anyone does what they do, in any situation at all. Psychology and philosophy are the two shelves I never quite get out of.

Currently reading

ACOTAR series, book 4 of 5
A Court of Frost and Starlight
Sarah J. Maas

Connect

Experience

ConnectWise
Jun – Aug 2026 · On-siteSoftware Engineer Intern · DevOps
- Extended an autonomous SRE agent that took MTTR from 3 hours to 15 minutes.
- Added its MCP integrations across Dynatrace, OpenSearch and AWS, so that it took incident triage, root-cause analysis and mitigation planning off people's hands across 50+ production incidents.
- Benchmarked its root-cause accuracy at 90–95% by cross-verifying what the agent found with senior engineers and domain experts, in live war rooms.
- Built the agent-to-Teams notifier from scratch: an adaptive card lands in Teams when an investigation completes, fails or times out.
DynatraceOpenSearchAWSMCP
Annam.ai · IIT Ropar
Jun – Aug 2025 · RemoteSoftware Engineer Intern
- Built the React frontend for a poll automation platform.
- Added its real-time features over Socket.io, with Node.js and Express behind them.
ReactSocket.ioNode.jsExpress

Education

D.Y. Patil College of Engineering, Akurdi

2023 – 2027 · CGPA 9.46/10

B.E. Information Technology

Selected work

Product engineering

formforge

live code

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.

Next.js · tRPC · Express · Drizzle · PostgreSQL · Turborepo

formforge.jdevs.codes

canvas

Planteam ▾

Seats

rule

show Seats when Plan is team

the server checks it again on submit

Retrieval

lecturelens

live code

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.

Node.js · Qdrant · Transformers.js · Gemini · React

lecturelens-eight.vercel.app

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

trace

live code

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.

Next.js · Vercel AI SDK · Claude · MCP · PostgreSQL · Drizzle

trace-zeta-three.vercel.app

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

custom-oidc-provider

live code

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.

TypeScript · Node.js · jose · Drizzle · OIDC

Hosted on a free tier that sleeps. The first load takes about 30 seconds.

custom-oidc-provider.onrender.com

eyJhbGciOiJSUzI1NiIsImtpZCI6ImsxIn0.eyJpc3MiOiJodHRwczovL2N1c3RvbS1vaWRjLXByb3ZpZGVyLm9ucmVuZGVyLmNvbSIsInN1YiI6InByZWV0IiwiYXVkIjoicHJlZXRqYWluLmNvbSIsImV4cCI6MjA1MTIyMjQwMH0.Qm9vdHN0cmFwcGVkIGZyb20gdGhlIHNwZWMsIG5vdCBhIGxpYnJhcnk

header

{ "alg": "RS256", "kid": "k1" }

payload

{ "iss": "https://custom-oidc-provider.onrender.com",
  "sub": "preet",
  "aud": "preetjain.com",
  "exp": 2051222400 }

signature

RS256 · checked against JWKS ✓

See the other 6

Stack

01Agentic & GenAI

MCPRAGHyDERerankingVector SearchGuardrailsVercel AI SDK

02Language

TypeScriptJavaScript

03Frontend

ReactNext.jsTailwind CSS

04Backend

Node.jsExpresstRPCSocket.io

05Database & ORM

PostgreSQLMySQLMongoDBRedisQdrantpgvectorKafkaDrizzlePrisma

06DevOps & Cloud

AWSDockerKubernetesTerraformJenkins

07Observability

OpenSearchDynatraceGrafana

08Auth & Security

OAuth 2.0OIDCJWTPKCE

The real voyage of discovery consists not in seeking new landscapes, but in having new eyes.

Marcel Proust

Preet Jain

About

Currently reading

Connect

Experience

ConnectWise

Annam.ai · IIT Ropar

Education

D.Y. Patil College of Engineering, Akurdi

Selected work

formforge

lecturelens

trace

custom-oidc-provider

Stack