Builds — Nilotpal Roychowdhury

projects

Three builds. Three lessons. Three things that actually work now.

Each one cracked a different piece of the same puzzle, making data usable for the humans who need it, without a ticket queue.

active

Cortex

The simplest semantic layer for data-driven applications.

Open-source semantic layer. Metrics, dimensions, and measures defined in JSON. A REST API, a query engine with caching, a dashboard builder, a Python SDK, and connectors for Postgres, MySQL, BigQuery, SQLite, CSVs, and Sheets. It's what Telescope runs on. You can run it too.

PythonFastAPIVueTypeScriptPostgreSQLRedisDocker

GitHub Docs

upcoming soon

FastContext

Context pipelines that transform raw events into progressive understanding.

Events → Facts → Insights → Beliefs → Conviction

PythonSQLitePostgreSQLRedis

In development · shipping soon

active

Doorbeen

Connect LLMs to SQL databases. English in, answers out.

A LangGraph-powered SQL assistant. Users ask in English; Doorbeen plans, executes, corrects its own mistakes, and explains what it did. Streams, remembers context across turns, and runs against Postgres, MySQL, Oracle, SQLite, and BigQuery.

“Agents don't fail at generation. They fail at knowing when to stop.”

PythonLangGraphVueClerkDocker

Open source · research spike that refuses to die

archived

Telescope CS

The churn-prevention tool that taught me to build the right thing next.

“The tool gets thrown away. The lessons don't.”

Workbench

Python

TypeScript

Java

JavaScript

Dart

C++

FastAPI

LangGraph

Nuxt

Vue

Tailwind

shadcn

Clerk

PostgreSQL

Redis

BigQuery

SQLite

Docker

Pulumi

Terraform

Anthropic

OpenAI

Gemini

Flutter

Arduino

ESP32

Now Building

Building1/2

shipping every two weeks

Telescope SaaS v0.2

Simplifying the onboarding flow so a PM can wire up their first metric in under five minutes.

87.5

Building

95.2

Playing

103.8

Listening

108.0

Watching

Tune