https://github.com/lucasmargni/backend-playground

A collection of backend projects exploring different technologies, patterns, and problem-solving approaches.
https://github.com/lucasmargni/backend-playground

api backend learning nodejs portfolio postgresql typescript

Last synced: 3 days ago
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A collection of backend projects exploring different technologies, patterns, and problem-solving approaches.

• Host: GitHub
• URL: https://github.com/lucasmargni/backend-playground
• Owner: lucasmargni
• License: mit
• Created: 2026-05-29T00:51:20.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2026-06-12T15:37:40.000Z (16 days ago)
• Last Synced: 2026-06-12T16:11:27.352Z (16 days ago)
• Topics: api, backend, learning, nodejs, portfolio, postgresql, typescript
• Language: TypeScript
• Homepage:
• Size: 459 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Backend Playground

A collection of backend projects built to practice and deepen knowledge of backend development concepts, tools, and patterns. Each project focuses on a specific domain and technology stack, covering areas such as API design, authentication, database management, and performance optimization.

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## Projects

### 📝 GraphQL Blog API

A full-featured blog API built with GraphQL. Covers schema design, authentication with JWT, database integration with Prisma, cursor-based pagination following the Relay spec, and performance optimization with DataLoader.

![Node.js](https://img.shields.io/badge/Node.js-339933?style=flat&logo=nodedotjs&logoColor=white)

![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?style=flat&logo=typescript&logoColor=white)

![GraphQL](https://img.shields.io/badge/GraphQL-E10098?style=flat&logo=graphql&logoColor=white)

![Apollo](https://img.shields.io/badge/Apollo%20Server-311C87?style=flat&logo=apollographql&logoColor=white)

![Prisma](https://img.shields.io/badge/Prisma-2D3748?style=flat&logo=prisma&logoColor=white)

![PostgreSQL](https://img.shields.io/badge/PostgreSQL-4169E1?style=flat&logo=postgresql&logoColor=white)

📄 [View project README](./graphql-blog/README.md)

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### 🏛️ Olympus API

A REST API about Greek mythology built with NestJS. Covers REST API design, Single Table Inheritance with TypeORM, API Key authentication with custom Guards, Redis caching, full-text search with PostgreSQL, and auto-generated Swagger documentation.

![Node.js](https://img.shields.io/badge/Node.js-339933?style=flat&logo=nodedotjs&logoColor=white)

![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?style=flat&logo=typescript&logoColor=white)

![NestJS](https://img.shields.io/badge/NestJS-E0234E?style=flat&logo=nestjs&logoColor=white)

![TypeORM](https://img.shields.io/badge/TypeORM-FE0803?style=flat&logo=typeorm&logoColor=white)

![PostgreSQL](https://img.shields.io/badge/PostgreSQL-4169E1?style=flat&logo=postgresql&logoColor=white)

![Redis](https://img.shields.io/badge/Redis-DC382D?style=flat&logo=redis&logoColor=white)

![Swagger](https://img.shields.io/badge/Swagger-85EA2D?style=flat&logo=swagger&logoColor=black)

📄 [View project README](./nestjs-olympus-api/README.md)

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### 🔐 Cipher VaultX API

A secure secrets manager API built with NestJS. Covers end-to-end encryption with AES-256-GCM and PBKDF2, per-user key wrapping for secure vault sharing, JWT authentication, role-based permissions, append-only audit logging, and a full hardening layer with rate limiting and Swagger documentation.

![Node.js](https://img.shields.io/badge/Node.js-339933?style=flat&logo=nodedotjs&logoColor=white)

![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?style=flat&logo=typescript&logoColor=white)

![NestJS](https://img.shields.io/badge/NestJS-E0234E?style=flat&logo=nestjs&logoColor=white)

![TypeORM](https://img.shields.io/badge/TypeORM-FE0803?style=flat&logo=typeorm&logoColor=white)

![PostgreSQL](https://img.shields.io/badge/PostgreSQL-4169E1?style=flat&logo=postgresql&logoColor=white)

![Security](https://img.shields.io/badge/Security-AES--256--GCM-success?style=flat&logo=letsencrypt&logoColor=white)

![JWT](https://img.shields.io/badge/JWT-000000?style=flat&logo=jsonwebtokens&logoColor=white)

![Docker](https://img.shields.io/badge/Docker-2496ED?style=flat&logo=docker&logoColor=white)

![Swagger](https://img.shields.io/badge/Swagger-85EA2D?style=flat&logo=swagger&logoColor=black)

📄 [View project README](./cipher-vaultx-api/README.md)

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## License

This repository is licensed under the MIT License. See [LICENSE](./LICENSE) for details.