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Notes from building things.

What actually happened while building five products — the decisions, the mistakes, and the numbers behind them. No listicles.

ALL POSTS

Everything I have written

Sorted newest first.

ENGINEERING

Why instant digital delivery is harder than it looks

An order that completes in two seconds needs a queue, a retry policy and a refund path. Here is the architecture that finally held under load.

8 min read Read post →
AI

Putting an AI assistant into a product people pay for

Where the API key lives, what each request really costs, and how to stop the model answering questions it has no business answering.

7 min read Read post →
DESIGN

Dark interfaces people can actually read

Pure black is a trap. Contrast ratios, glass surfaces, and the three mistakes I made before this site looked right.

6 min read Read post →
PAYMENTS

Building escrow that survives real disputes

Holding money is the easy part. Deciding who gets it when two people disagree is where the design work is.

9 min read Read post →
PROCESS

Shipping five products as one person

What you must automate, what you must refuse, and why saying no to features is the whole job.

5 min read Read post →
PRODUCT

Designing for Bangla first, English second

Most tools translate an English product into Bangla and call it localisation. That is not the same thing.

6 min read Read post →

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