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Janarayson
Writing
About
Engineering
How things got built, and the bits of code worth showing.
All
117
Projects
25
Pitches
8
Design
22
Engineering
39
Career
17
Retrospective
6
2026
29 Oct
How Mama remembers what you tell her
23 Oct
Moving Mama's users from WhatsApp to the app
19 Oct
The code I wrote in 2001 is still on the internet
17 Oct
Neon over Supabase for our internal tools
14 Oct
Losing the phone number, part 2: the users who came back
11 Oct
How we made Mama's message classifier eight times faster
9 Oct
How Mama's knowledge base works, and what we changed this week
7 Oct
From GPT-4.1 to GPT-6.1: what changed when Mama started thinking
2 Oct
Transcribing on the Mac: why I built the transcribers and how the YouTube one works
24 Sep
Why MoneyMama builds on Expo and ships through Codemagic
21 Sep
Marketing as code, part 3: Mama's blog
17 Sep
Store release notes from a Claude skill
12 Sep
Getting an AI app through App Store and Play Store review
8 Sep
Keeping Mama in character: personality drift and five personas
4 Sep
Changing a company address on Google Play, the App Store and D-U-N-S
16 Aug
How a calculator result follows you into the chat
10 Aug
Losing the phone number, part 1: Meta's business-scoped user IDs
3 Jul
Marketing as code, part 2: posts and carousels
30 Jun
Moving MoneyMama's calculators to Astro without changing a single answer
17 Apr
Marketing as code, part 1: Mama's reels
2024
31 Jul
Hargapedia's latest update is a whole new app
28 Feb
Turning our promotions report into a video with an AI presenter
2023
8 Nov
AI PromoPulse: the first GPT feature we shipped
2022
11 Feb
Deleting your account in Hargapedia
7 Jan
A new panel for the barcode scanner
2021
27 Aug
The price history graph, and the clamp I forgot
18 May
Moving the web version to Next.js for SEO
5 Feb
Twenty-one days and five friends
2020
28 Jul
Hargapedia on the web
24 Jun
Sign in with Apple
5 Jun
A barcode and QR scanner
13 Mar
Postcodes instead of cities
2019
10 Dec
Suggestions as you type in Hargapedia search
19 Nov
Vouchers come to Hargapedia
4 Jun
Sabah and Sarawak get their own prices in Hargapedia
2015
17 Sep
Newsboard for AIA, part 2: building it
2014
10 Dec
Masterpieces, our first React app
2013
8 May
GE13, our app for the general election
2012
6 Nov
Tap to Order: queue, order and pay with an NFC tap
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