Tutorials, guides, and engineering notes on building production NestJS applications.
audit-log
How to Build an Audit Log in NestJS (Track Who Changed What, When)A complete walkthrough of building an audit log in NestJS — design the audit_logs table, capture changes via a TypeORM subscriber, exclude sensitive fields, and resolve the actor automatically.
Read moreSoftware Engineer · Nestbolt
factory
How to Seed a NestJS Database (Factories, Fixtures, and Realistic Test Data)A complete walkthrough of database seeding in NestJS — define factories with Faker, organize seeders, generate realistic test data, and stop writing the same insert scripts every project.
Read moreSoftware Engineer · Nestbolt
excel
How to Export Data to Excel in NestJS (XLSX, CSV, and Streaming Downloads)A complete walkthrough of exporting data to Excel from a NestJS API — generate XLSX with ExcelJS, stream large exports without blowing up memory, support CSV, and avoid the formatting traps that bite teams in production.
Read moreSoftware Engineer · Nestbolt
medialibrary
How to Handle File Uploads in NestJS (With Image Thumbnails and S3)A complete walkthrough of building file uploads in a NestJS app — accept multipart uploads, store files on disk or S3, associate them with database entities, and auto-generate image thumbnails with Sharp.
Read moreSoftware Engineer · Nestbolt
translatable
i18n in NestJS — How to Translate Database Content (Not Just Static Strings)A complete walkthrough of localizing dynamic content in NestJS — store translations in JSONB, resolve the locale per request, return a single translated string in API responses, and fall back gracefully when a locale is missing.
Read moreSoftware Engineer · Nestbolt
authentication
How to Add JWT Authentication in NestJS (Step-by-Step Guide)A complete walkthrough of building JWT authentication in a NestJS app — install dependencies, hash passwords with bcrypt, build login/register endpoints, configure JwtModule, and protect routes with guards.
Read moreSoftware Engineer · Nestbolt
notifications
How to Send Notifications in NestJS (Email, In-App, and Multi-Channel)A complete walkthrough of building a notifications system in NestJS — store in-app notifications in the database, send transactional emails with nodemailer, and dispatch the same notification across multiple channels at once.
Read moreSoftware Engineer · Nestbolt
permissions
Role-Based Access Control in NestJS (RBAC with Roles and Permissions)A complete walkthrough of building role-based access control in NestJS — design the schema, write permission checks, protect routes with guards, and avoid the pitfalls that bite teams in production.
Read moreSoftware Engineer · Nestbolt
soft-delete
How to Soft Delete Records in NestJS (TypeORM Restore, Force Delete, and Trashed Queries)A complete walkthrough of soft deletes in NestJS with TypeORM — add a deleted_at column, intercept repo.remove(), restore and force-delete records, and query trashed rows without surprising your team.
Read moreSoftware Engineer · Nestbolt