Vadym Arnaut

Building Equip, an open-source LMS for Bible schools (FastAPI, React, Supabase). Writing on web architecture, AI agents, and building in public.

Indianapolis, IN Joined on Apr 25, 2026 arvavitcorp@gmail.com https://vadymarnaut.com

Education

B.S. in Computer Science, Borys Grinchenko Kyiv University, 2025

Work

Software Engineer at Invisible Technologies

Auditing the auditor's own false positives

Vadym Arnaut

Aug 12

My memory auditor said half my agent's facts were dead. Three were.

#ai #agents #webdev #python

6 min read

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Vadym Arnaut

Jul 7

I sent HTTP QUERY through the real internet. The smarter the layer, the harder it broke.

#webdev #http #security #backend

7 min read

Vadym Arnaut

Jul 4

HTTP finally shipped QUERY. I fired it at production and the edge called it a bot.

#webdev #backend #http #api

6 min read

Vadym Arnaut

Jun 25

Three ways our prod got slow (and not one was a slow algorithm)

#postgres #webdev #performance #supabase

5 min read

Vadym Arnaut

Jun 17

I had real backend auth. The browser just walked around it.

#supabase #security #postgres #webdev

3 min read

Vadym Arnaut

Jun 9

I ran 4 AI agents on yesterday's PRs. Two real security bugs surfaced.

#security #ai #python #testing

4 min read

Vadym Arnaut

May 28

There is no source language: a manifesto for symmetric multilingual content

#architecture #i18n #webdev #postgres

6 min read

Vadym Arnaut

May 27

The auth_rls_initplan linter has a blind spot: SECURITY DEFINER bodies

#supabase #postgres #webdev #database

2 min read

Vadym Arnaut

May 21

Equip: an open-source LMS for Bible schools — bilingual, scripture-aware, 4 weeks of real users

#showdev #opensource #webdev #supabase

7 min read

Vadym Arnaut

May 20

76 RLS policies rewritten in one migration: the auth.uid() init-plan trap in Supabase

#supabase #postgres #performance #webdev

6 min read

Vadym Arnaut

May 15

4 footguns integrating YouVersion's new platform API — and a clean Verse of the Day

#opensource #fastapi #react #api

6 min read

Vadym Arnaut

May 13

Two days lost to PGRST116: when Supabase RLS hides a successful write

#supabase #postgres #debugging #webdev

3 min read

Vadym Arnaut

May 13

The 3 i18n mistakes every open-source LMS makes

#i18n #architecture #webdev #opensource

5 min read

Vadym Arnaut

May 10

I wrote 'these fields are translatable' in five different files. Then I stopped.

#architecture #python #fastapi #i18n

5 min read

Vadym Arnaut

May 10

Don't trust the LLM with scripture: a canonical-text substitution layer for Bible quotes

#opensource #react #fastapi #supabase

6 min read

Vadym Arnaut

May 10

Two weeks of building Equip in public: first contributor, bilingual content, real production bug

#opensource #react #fastapi #supabase

5 min read

Vadym Arnaut

Apr 25

Equip: an open-source LMS for small schools and volunteer-run programs (React, FastAPI, Supabase)

#opensource #react #fastapi #supabase

2 min read

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Vadym Arnaut

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My memory auditor said half my agent's facts were dead. Three were.

Want to connect with Vadym Arnaut?

I sent HTTP QUERY through the real internet. The smarter the layer, the harder it broke.

HTTP finally shipped QUERY. I fired it at production and the edge called it a bot.

Three ways our prod got slow (and not one was a slow algorithm)

I had real backend auth. The browser just walked around it.

I ran 4 AI agents on yesterday's PRs. Two real security bugs surfaced.

There is no source language: a manifesto for symmetric multilingual content

The auth_rls_initplan linter has a blind spot: SECURITY DEFINER bodies

Equip: an open-source LMS for Bible schools — bilingual, scripture-aware, 4 weeks of real users

76 RLS policies rewritten in one migration: the auth.uid() init-plan trap in Supabase

4 footguns integrating YouVersion's new platform API — and a clean Verse of the Day

Two days lost to PGRST116: when Supabase RLS hides a successful write

The 3 i18n mistakes every open-source LMS makes

I wrote 'these fields are translatable' in five different files. Then I stopped.

Don't trust the LLM with scripture: a canonical-text substitution layer for Bible quotes

Two weeks of building Equip in public: first contributor, bilingual content, real production bug

Equip: an open-source LMS for small schools and volunteer-run programs (React, FastAPI, Supabase)