Sales built a barcode scanner that only works on one phone

“The AI understands the code.”— Lukas, Sales

Reason:

Officially because nobody could find the right SharePoint folder in 8 minutes of looking. Started as Suppliers_v2.csv with a script attached.

Built by:

Lukas, an analyst

Build time:

one weekend

Built with:

Streamlit

Database:

a Git repository with one JSON file per customer

Authentication:

JWT validation checks that the token looks like a JWT

Deployment:

accessible through an IP address because DNS is "later"

Responsible:

whoever happens to be on call

Documentation:

a Slack thread from February

Security situation:

the session never expires

Future disaster:

It will be presented at a conference as a success story.

Age: 12 days · originally expected to last 7 days · 2 owners so far · survived 1 reorganisation · last meaningful change 12 days ago

Rated legendary mostly because: 683 users, 5 accidental connections, 22% chance of becoming business critical.