Aryan Kumar

aboutcluster: me10 chunks point here

I'm Aryan. I build whole products, often late.

A web developer in the UK. I build solo in TypeScript, from the database to the iOS build, and I'm now teaching myself to build AI: RAG and agents.

Role
Web developer, solo
Based
UK
Learning now
RAG and AI agents
Final-year project
University of Birmingham
Sources for these facts
  • Role: git shortlog across my repos
  • Based: Aryan
  • Learning now: Aryan, October 2026
  • Final-year project: Project-RPG; git.cs.bham.ac.uk projects-2024-25

Who I am

Much of what I build is the unglamorous part: HMRC tax rules and clock changes on Shyft, and on EstateLink, a database transaction that stops a tenant ending up half moved in.

I work in TypeScript and I write in British English. I also don't invent numbers. If a figure is on this site, the file or command it came from is written underneath it, and if I don't know something, I leave it out.

My first web-dev client was a BMW and MINI workshop in Brierley Hill. My first LLM call was in my final-year project at the University of Birmingham. Now I'm learning RAG and agents, from the beginning.

AI learning

What I'm learning now

Building AI, not just using it. I'm at the very start: nothing shipped yet, and I'd rather say that plainly.

  1. Now

    RAG

    Getting a model to answer from my own documents instead of from memory: find the right passages first, then let the model answer from those, with its sources.

    Aryan, October 2026

  2. Now

    AI agents

    Models that work through a task in steps and use tools along the way, rather than replying once. Also at the start.

    Aryan, October 2026

  3. 2024 to 2025

    Mythos, my first LLM call

    My final-year project. Type a chore and an OpenAI model turns it into a fantasy quest with XP. The bit I'd keep: it checks the model's JSON and clamps the XP between 10 and 150 before anything reaches the screen.

    Read about Mythos

    Project-RPG backend/controllers/questController.js, lines 51 to 70

About the map on the home page: it's a keyword toy. It scores words, not meaning, and it says so under the search box. Try the toy

this site, src/scripts/retrieve.ts

My busiest hour is 23:00.My quietest is 09:00.

I commit late. Across five repos and 990 commits, the bars climb through the evening and peak at 23:00, with 113. Another 261 landed between midnight and 5am.

Monday is my busiest day, with 231 commits. Saturday and Sunday come second and third.

Commits by hour of day, 990 in totalBar chart of 990 commits by the hour they were made. Commits are rare from 05:00 to 09:59, 18 in total, then rise through the afternoon and evening to a peak at 23:00 with 113. 261 commits fall between midnight and 5am.midnight to 5am, 26100:00, 109 commits01:00, 69 commits02:00, 44 commits03:00, 25 commits04:00, 14 commits05:00, 4 commits06:00, 3 commits07:00, 5 commits08:00, 5 commits09:00, 1 commits10:00, 24 commits11:00, 24 commits12:00, 33 commits13:00, 45 commits14:00, 51 commits15:00, 57 commits16:00, 46 commits17:00, 37 commits18:00, 40 commits19:00, 39 commits20:00, 51 commits21:00, 55 commits22:00, 96 commits23:00, 113 commitspeak 23:00, 11300:0006:0012:0018:00
All 24 hours
00:00
109
01:00
69
02:00
44
03:00
25
04:00
14
05:00
4
06:00
3
07:00
5
08:00
5
09:00
1
10:00
24
11:00
24
12:00
33
13:00
45
14:00
51
15:00
57
16:00
46
17:00
37
18:00
40
19:00
39
20:00
51
21:00
55
22:00
96
23:00
113
Commits
990
Peak hour
23:00, 113
Midnight to 5am
261
Busiest day
Monday, 231
git log --all --author=Aryan over five of my repos, 15 Oct 2026

A real commit message from the 1am hour, on Shyft:

fix(legal): keep the employer's records when a worker deletes their account (#367)

Shift-Tracker git log

What I've built so far

Four projects, with honest labels. Each page has the full story and its sources.

  • Shyft

    My product, live on the web

    Shift tracking and real take-home pay for UK workers. The iOS app is in App Store review.

  • CODEMYBM UK

    Client work, my first web-dev client

    A full rebuild for a BMW and MINI coding workshop in Brierley Hill.

  • EstateLink

    My product

    Property management for UK landlords: properties, tenants, leases and a live dashboard.

  • Mythos

    Final-year project

    A to-do app where an LLM turns chores into quests with XP.

Tools I build with

TypeScript
Every front end here, in strict mode on Shyft and CODEMYBM UK
React
Shyft, EstateLink, Mythos, and CODEMYBM UK through Next.js
Vite
Shyft, EstateLink, Mythos
Next.js
CODEMYBM UK
Supabase
Shyft: the database, auth and edge functions
Postgres
Shyft, through Supabase, with row-level security
MongoDB
EstateLink, Mythos
Capacitor
Shyft's iOS app, from the same codebase as the web
package.json files across Shift-Tracker, codemybm, EstateLink and Project-RPG

How I work

  • I check my maths against the source.

    Shyft's tax engine is tested against all 1,000 entries of HMRC's Table A, plus a 2,000-case property test that checks nothing goes negative and take-home never beats gross pay.

    Shift-Tracker client/src/lib/__tests__/hmrcTableA.test.ts; client/docs/payroll-engine.md

  • I write decisions down.

    Shyft's payroll engine has a doc of its decisions of record: what it deliberately doesn't do, and how it rounds. One test is set to fail from 6 April 2027 until I re-check the tax constants for the new year.

    Shift-Tracker client/docs/payroll-engine.md; client/src/lib/taxCalculator.ts, line 104

  • Every figure has a source.

    Including on this page. If a number appears, where it came from is written under it. If I can't source something, it stays off the page.

That's me, so far.

If something here is useful to you, or you're learning RAG too, get in touch.

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