Blog

How the apps in my portfolio were built.

Ahmed Abdelmageed3 October 20262 min read
Prepare for any job interview with AI, from your phone
Five steps that take about an hour: predict the questions, polish your answers, rehearse out loud with a voice assistant, get honest feedback, and practise in English.
- AI for everyone
Ahmed Abdelmageed2 October 20262 min read
5 things that used to be hard, and are easy now with AI
Designing an image, summarising a long file, writing a CV, editing photos and learning something new: what each took before, and what it takes now from a phone.
- AI for everyone
Ahmed Abdelmageed2 October 20263 min read
One backend, many coffee shops: multi-tenancy with Express and PostgreSQL
How My Coffee keeps every shop's menu, staff and orders apart in one API and one database: a shop on every row, a tenant read from the database and not the token, and tests that try to cross the line.
- Backend
- PostgreSQL
- Security
Ahmed Abdelmageed2 October 20264 min read
Printing kitchen tickets from a cloud app with an 89-line Node bridge
How an order placed on a phone reaches a thermal printer inside a coffee shop: a polling bridge with no dependencies, tickets drawn as images so Arabic prints correctly, and a queue that survives a crash.
- Backend
- APIs
Ahmed Abdelmageed2 October 20263 min read
Arabic RTL in React Native and Expo: what breaks and how I fix it
Lessons from three Arabic apps: switching direction without a reload loop, numbers that jump to the wrong side, charts that must not mirror, and icons that flip twice.
- React Native
- Arabic RTL
Ahmed Abdelmageed2 October 20263 min read
Building a live fleet map on the Navixy GPS API
Polling that stops when nobody is looking, markers that glide instead of jumping, and the small traps in GPS data: two kinds of status, and trackers that report from 0,0.
- React Native
- APIs
- Maps
Ahmed Abdelmageed28 September 20262 min read
How Gym Buddy turns a photo of your meal into calories
Shrinking the photo on the phone, asking Gemini for JSON that matches a schema, and handling a free tier that's sometimes busy.
- React Native
- AI
Ahmed Abdelmageed28 September 20262 min read
Signing crypto orders on a phone without confusing errors
How Megora signs Binance orders on the device, fixes clock drift, and rejects bad orders before the exchange does.
- React Native
- Security
- APIs