---
title: Backend Commands
icon: "terminal"
---


## Useful commands

These commands should be executed from packages/twenty-server folder.
From any other folder you can run `npx nx {command} twenty-server` (or `npx nx run twenty-server:{command}`).

### First time setup

```
npx nx database:reset twenty-server # setup the database with dev seeds
```

### Starting the server

```
npx nx run twenty-server:start
```

### Lint

```
npx nx run twenty-server:lint # pass --fix to fix lint errors
```

### Test

```
npx nx run twenty-server:test:unit          # run unit tests
npx nx run twenty-server:test:integration   # run integration tests
```
Note: you can run `npx nx run twenty-server:test:integration:with-db-reset` in case you need to reset the database before running the integration tests.

### Resetting the database

If you want to reset and seed the database, you can run the following command:

```bash
npx nx run twenty-server:database:reset
```

### Migrations

#### For objects in Core/Metadata schemas (TypeORM)

```bash
npx nx run twenty-server:database:migrate:generate
```

## Tech Stack

Twenty primarily uses NestJS for the backend.

Prisma was the first ORM we used. But in order to allow users to create custom fields and custom objects, a lower-level made more sense as we need to have fine-grained control. The project now uses TypeORM.

Here's what the tech stack now looks like.


**Core**
- [NestJS](https://nestjs.com/)
- [TypeORM](https://typeorm.io/)
- [GraphQL Yoga](https://the-guild.dev/graphql/yoga-server)

**Database**
- [Postgres](https://www.postgresql.org/)

**Third-party integrations**
- [Sentry](https://sentry.io/welcome/) for tracking bugs

**Testing**
- [Jest](https://jestjs.io/)

**Tooling**
- [Yarn](https://yarnpkg.com/)
- [Oxlint](https://oxc.rs/docs/guide/usage/linter.html)

**Development**
- [AWS EKS](https://aws.amazon.com/eks/)