Mobile application

Languages: JavaScript, TypeScript.

• Expo.
• React Native.
• Redux.
• Firebase.
  • Cloud Messaging.
  • Realtime Database.
  • Cloud Storage.

Backoffice web

Languages: JavaScript.

• React.
• Redux.
• Material UI.

Back-end microservices

Languajes: JavaScript, Python.

• Node.js.
• Express.js (for services written in JavaScript).
• FastAPI (for services written in Python).
• Docker.
• Docker Compose.
• PostgreSQL.
• MongoDB.
• Dependable (dependency injector).

Payments

Languages: JavaScript, TypeScript, Solidity.

• Hardhat.
• Ethers.
• Kovan.

Deployment and CI-CD

• Heroku.
• GitHub Actions.

Testing

• For services written in JavaScript:
  • Jest.
  • Supertest.
• For services written in Python:
  • unittest
  • FastAPI TestClient
• Codecov.

Monitoring and Logging

• NewRelic.
• Winston (logger).
• Heroku Logs.
• SumoLogic.