Daniel Pertu - DEV Community

Daniel Pertu

Oct 4

69 pages in one array, and 29 tests that fail if any of them is an orphan

#typescript #seo #nextjs #testing

6 min read

Daniel Pertu

Oct 4

One of our fourteen guides emits HowTo markup, and the other thirteen are not instructions

#seo #nextjs #typescript #webdev

5 min read

Daniel Pertu

Oct 4

A hundred phones in one pub share one IP, so an IP-keyed rate limit is a limit on the room

#redis #nextjs #architecture #webdev

5 min read

Daniel Pertu

Oct 4

null meant unlimited, so our free plan had more of the paid feature than the paid plan

#typescript #saas #webdev #architecture

5 min read

Daniel Pertu

Oct 4

Four tools on our marketing site, none of which have a backend, and one that competes with us

#react #nextjs #webdev #seo

1

6 min read

Daniel Pertu

Oct 4

A price that is right in the first frame, and a conversion that only ever rounds up

#nextjs #typescript #webdev #saas

5 min read

Daniel Pertu

Oct 4

We shipped a feature whose only job is to stop the pipeline, and enough is two weekdays of outflow

#typescript #postgres #architecture #webdev

8 min read

Daniel Pertu

Oct 4

Pause became a question with three answers, so we wrote the rules twice and only one copy has tests

#postgres #typescript #sql #webdev

7 min read

Daniel Pertu

Oct 4

One request a second for the whole app, so our place search has no search-as-you-type

#webdev #typescript #api #ux

7 min read

Daniel Pertu

Oct 4

Our email filter keeps two kinds of address, and a Wix subdomain is why it almost kept everything

#typescript #webdev #node #email

7 min read

Daniel Pertu

Oct 4

Two campaigns in one city import the listing once, and the cache key is a half degree square

#postgres #typescript #webdev #architecture

6 min read

Daniel Pertu

Oct 4

16 Parquet files in a bucket we do not own, and the only client is DuckDB

#duckdb #sql #typescript #webdev

5 min read

Daniel Pertu

Oct 4

Encrypted at rest unless it cannot be, and the file itself says which

#electron #security #privacy #node

7 min read

Daniel Pertu

Oct 4

Our window reloads itself every time you open it, so the renderer may not remember anything

#electron #architecture #react #typescript

6 min read

Daniel Pertu

Oct 4

Our download button is a 302 to a URL that stops working in 60 seconds

#nextjs #cloudflare #security #webdev

5 min read

Daniel Pertu

Oct 4

Four kinds of email, one endpoint, and only one caller is allowed to throw

#api #node #electron #webdev

6 min read

Daniel Pertu

Oct 4

Our ledger is one append-only text file, and a torn last line costs us one row

#electron #node #architecture #typescript

6 min read

Daniel Pertu

Oct 4

Our activation code has no O, no 0, no I and no 1, and 32 is what makes the maths safe

#node #security #typescript #webdev

5 min read

Daniel Pertu

Oct 4

Our cache TTL was shorter than the gap between reads, which makes it a timer, not a cache

#redis #performance #architecture #webdev

5 min read

Daniel Pertu

Oct 4

Renaming our publisher was two constants away from re-prompting every account for consent

#typescript #webdev #seo #privacy

1

5 min read

Daniel Pertu

Oct 4

A Resend webhook belongs to the account, not the domain, so every email arrived twice

#webdev #email #nextjs #typescript

5 min read

Daniel Pertu

Oct 4

One palette, three consumers that import it and one that keeps a copy, and the copy is the deliberate part

#design #typescript #css #reactnative

5 min read

Daniel Pertu

Oct 4

1,250,964 audit rows recorded that we had decided nothing, and 51,884 recorded a decision

#postgres #database #devops #architecture

5 min read

Daniel Pertu

Oct 4

A search box is a second door into the same scanner, and Postgres made us write one expression twice

#architecture #postgres #typescript #webdev

5 min read

Daniel Pertu

Oct 4

Our delete all my data button leaves one table alone, and the dialog says so

#gdpr #postgres #nextjs #webdev

4 min read

Daniel Pertu

Oct 4

We dropped 8 indexes and added 3 without a single production statistic

#postgres #database #webdev #performance

5 min read

Daniel Pertu

Oct 4

Our re-consent flow is two strings, and the hard part was not writing during render

#nextjs #react #webdev #gdpr

4 min read

Daniel Pertu

Oct 4

Five of our ten analytics event groups were never called, so the insights said no data forever

#analytics #webdev #nextjs #typescript

1

3 min read

Daniel Pertu

Oct 4

Two signals want the same redirect, and the fresher one is not the one we stored

#nextjs #webdev #security #typescript

4 min read

Daniel Pertu

Oct 4

Deleting an account calls one function and names no table

#postgres #supabase #webdev #gdpr

3 min read

Daniel Pertu

Oct 4

Our structured data named a founder, and the fix was to name nobody

#seo #typescript #webdev #nextjs

3 min read

Daniel Pertu

Oct 3

Our brand voice rules are unit tests, including the one that bans the em dash

#testing #typescript #seo #webdev

7 min read

Daniel Pertu

Oct 3

The free plan searches exactly like the paid one and hides the results, and the blurred rows are fake on purpose

#postgres #sql #webdev #react

6 min read

Daniel Pertu

Oct 3

A paused campaign still answers its email, because the pause has a reason column

#postgres #architecture #saas #webdev

6 min read

Daniel Pertu

Oct 3

Our outreach emails wait for 9am in the creator's time zone, and Intl does all the hard parts

#node #javascript #webdev #architecture

6 min read

Daniel Pertu

Oct 3

Our daily API cap is three times last week's busiest day, because a fixed cap is a growth ceiling

#postgres #node #architecture #webdev

6 min read

Daniel Pertu

Oct 3

One email address per conversation, because Reply-To is only a suggestion

#webdev #node #architecture #email

6 min read

Daniel Pertu

Oct 3

Twenty-one tests on one list of pages, and the one that fails if nothing links to a page

#typescript #seo #architecture #testing

8 min read

Daniel Pertu

Oct 3

Two of our guide pages are instructions and one is a list, so only one of them emits a HowTo

#seo #nextjs #typescript #webdev

7 min read

Daniel Pertu

Oct 3

null meant unlimited, so for a while our free trial could build more question packs than Pro

#typescript #saas #postgres #webdev

1

7 min read

Daniel Pertu

Oct 3

A hundred phones in one pub share one exit IP, so half our rate limiters are not keyed on it

#redis #webdev #typescript #security

1

8 min read

Daniel Pertu

Oct 3

Our IndexNow key is committed to the repository, and the auth gate was the only thing that nearly broke it

#seo #nextjs #typescript #webdev

7 min read

Daniel Pertu

Oct 3

Four working tools on our marketing site, and not one request leaves the browser

#javascript #webdev #nextjs #performance

7 min read

Daniel Pertu

Oct 3

Chrome on an M3 says it is an Intel Mac, so our download page has three buttons and no guessing

#webdev #nextjs #javascript #seo

5 min read

Daniel Pertu

Oct 3

A stale "checking..." restored from disk is a lie, so one of our six stores has no file

#architecture #electron #node #typescript

7 min read

Daniel Pertu

Oct 3

€9,99 per month is a paywall, €1,450 per month is the rent, and two digits is the whole difference

#automation #typescript #webdev #programming

6 min read

Daniel Pertu

Oct 3

Our own rate limiter answered "valid: false", and the licence check believed it

#api #node #webdev #typescript

5 min read

Daniel Pertu

Oct 3

A laptop lid is not a restart: seven ways our app stops, and what each one is allowed to forget

#electron #javascript #architecture #webdev

6 min read

Daniel Pertu

Oct 3

Electron cookies say "unspecified", Playwright only knows "Lax", and the mapping logged everyone out

#electron #playwright #javascript #webdev

5 min read

Daniel Pertu

Oct 3

Two conditions, one product, and the rule we deliberately apply to only one of them

#typescript #architecture #ux #mobile

6 min read

Daniel Pertu

Oct 3

We deleted the list of retailers from our label parser, because a list only ever saves the first sighting

#typescript #ai #data #architecture

5 min read

Daniel Pertu

Oct 3

Our uncertainty is a field on the rule set, not a sentence in the copy deck

#typescript #architecture #ux #webdev

5 min read

Daniel Pertu

Oct 3

A dish on a restaurant menu is never allowed to go green in our app

#reactnative #ux #architecture #mobile

6 min read

Daniel Pertu

Oct 3

A barcode we do not hold is answered by asking you for a photo, not by asking somebody else

#architecture #privacy #redis #nextjs

6 min read

Daniel Pertu

Oct 3

A label that prints "nuts" is evidence. The same word inferred from "almond" is not.

#typescript #architecture #reactnative #ux

5 min read

Daniel Pertu

Oct 3

Chrome records WebM with no duration in the header, and five HEAD requests decide whether you get charged

#javascript #webdev #react #typescript

6 min read

Daniel Pertu

Oct 3

664KB of expert answer keys, and an import graph is the only thing keeping them off your machine

#nextjs #react #webdev #performance

5 min read

Daniel Pertu

Oct 3

Our affiliate payout command cannot send money, and that is the feature

#postgres #stripe #typescript #webdev

6 min read

Daniel Pertu

Oct 3

Skipped is not failed, and that one distinction is what made our nightly job alertable

#postgres #nextjs #webdev #devops

5 min read

Daniel Pertu

Oct 3

121,570 blocked email domains, 2MB of JSON, and not one byte of it reaches the browser

#webdev #nextjs #performance #security

4 min read

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