Back4App

Parse SDK 4.2.1

Invoices, bills and a weekly money view for one small business — Node 22 + Express 5 + PostgreSQL on Back4app Containers, deployed from a fork using only a browser.

Move a Gantt spreadsheet into a Parse database and query it: twelve activities imported in 502 ms, then four queries for what is late, what is running, which milestones remain and what is blocked. Dates as Date, dependencies as Array. Companion repo for the Back4app blog tutorial.

The same Node and Express app twice - as an AI tool generates it, and deployable. Four faults reproduced with their real output: a container reporting Up that returns HTTP 000, a start script whose necessity depends on the filename, a key readable from the image, and data that survives a restart but not a deploy.

Three Parse Server Cloud Code triggers that make a user ban stick: beforeLogin refuses the next login (400/141), afterSave ends sessions already open (400/209), beforeSave stops the banned user clearing their own flag. Companion repo for the Back4app blog tutorial.

Cash flow tracker (transactions, running balances, category reports) on Back4app Backend + Containers: 13 Cloud functions behind closed classes, read-only public demo, deployed from GitHub with the Node.js Buildpack — no Dockerfile. 159 checks pass against the live backend.

Flutter web app containerised for Back4app Containers: pinned Flutter 3.47.5 builds in a throwaway stage, nginx serves it. Web build compiles in 17s. The free way to host a Flutter build in 2026.

A one-page static site in a container, and the measurements behind the Dockerfile that serves it.

The product brief, architecture spine and decision logs that one BMAD Method run wrote to disk, kept verbatim. Companion repo for the Back4app blog tutorial.