backend · framework

NestJS

8 production projects and 1 rule set built with NestJS.

Production projects

Scheduling SaaS Classic Cal.com Splitting the tRPC-based web app from an independently versioned NestJS Platform API lets Cal.com serve both its own product and third-party developers from one monorepo, while Turborepo and per-integration app-store packages keep dozens of calendar/payment providers buildable and testable in isolation.
Photo & Video Management Platform Hybrid Immich Machine-learning inference is split into its own FastAPI/Python service with pluggable CPU/GPU backends so heavy models stay off the request-serving NestJS process, while BullMQ and Redis move thumbnailing and job dispatch out of the request/response path.
Low-Code Developer Tool Platform Hybrid ToolJet ToolJet allows teams to build complex internal web applications and dashboards with drag-and-drop React UI components and 50+ data connectors.
Smart Database Spreadsheet Hybrid NocoDB The backend uses Knex as a database-agnostic query layer over pg, mysql2, and sqlite3 so the same NestJS service can target whichever database an operator already runs, while the frontend and SDK are separate workspace packages that let the grid UI and API client evolve without redeploying the whole app.
API Testing Client Classic Hoppscotch App logic lives in one shared Vue package reused by every client shell, while a native Rust relay and a separate Tauri agent process handle outbound HTTP so desktop and agent users are not limited by browser CORS and sandboxing rules.
Collaborative Workspace Hybrid AFFiNE A single Yjs CRDT model lets docs, canvas and tables share one editor and sync engine; local-first storage in SQLite/IndexedDB keeps the app usable offline while a NestJS GraphQL server adds collaboration and cloud features.
Notification Infra Hybrid Novu Delivery concerns are split into separately deployable NestJS services (api, worker, ws, webhook, inbound-mail) sharing one Mongoose-based data-access library, so notification ingestion, queued processing, and realtime delivery can each be scaled and released on their own schedule inside a single Nx-managed workspace.
CRM SaaS Hybrid Twenty Twenty provides an extensible, modern CRM architecture featuring metadata-driven custom objects, GraphQL APIs, and clean UI design.

Often used with NestJS

Every rule ships as files

AGENTS.md rules and agent skills with NestJS

nestjs-postgres-redis/AGENTS.mdNestJS + PostgreSQL + Redis + BullMQEnterprise backend architecture guidelines for NestJS modular design, PostgreSQL connection pooling, Redis BullMQ background jobs, and DTO validation. intermediate

Questions about NestJS

How many production projects use NestJS?

8 verified production projects in the STACK IT FAST directory use NestJS, each with a full architecture breakdown.

What is NestJS most often used with?

Across projects in the directory, NestJS is most commonly paired with TypeScript, Redis, Docker.

Is there an AGENTS.md rule or Claude Code skill for NestJS?

Yes — NestJS + PostgreSQL + Redis + BullMQ includes a full AGENTS.md, CLAUDE.md, Cursor .mdc rule set and an installable SKILL.md covering NestJS.