file 01/06 · brief
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// case study · mobile backend

The backend behind
daily reflection.

Backend and cloud infrastructure for D4DX's Muhasabah: a self-reflection and goal-tracking app, live on the Play Store.

client · d4dxrole · backend + infrasince · apr 2025
on the play store ↗
Muhasabah goal-tracking app · screenshot
the story
// 01 · the challenge

Habits break if
the sync does.

D4DX needed a backend for an app people open every single day, check-ins, streaks, goals and notes, where one lost entry breaks more than data. It breaks a habit.

So reliability came first: a mobile-first workload on cloud infrastructure that keeps every reflection safe and every sync instant.

// 02 · what we built

Small app,
serious backend.

An API made for mobile
Lean endpoints for check-ins, goals and streaks, shaped around the app's daily rhythm, not generic CRUD.
Sync that never loses a day
Every entry lands in PostgreSQL the moment it's written, so streaks stay honest across devices.
Cloud sized for growth
AWS EC2 infrastructure provisioned for a mobile-first workload: steady today, ready for the install curve.
Play-Store ready
Hardened for a public launch. The app is live on Google Play with the backend holding.
// 03 · the stack

Boring where it should be.

Proven parts, assembled carefully. Novelty goes into the product, not the plumbing.

api
Node + Express
data
PostgreSQL
cloud
AWS EC2
serves
The mobile app
backend buildcloud infrastructure
// 04 · in production

On the Play Store.

dailythe workload is a habit loop · check-ins and streaks served reliably, every day.
syncedreflections and goals persist the moment they're written · no lost entries, no broken streaks.
livepublished on Google Play, with the backend running quietly in production.
muhasabah on google play ↗
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