The 5-step framework I use for any system design interview (6 worked examples)

Your app went viral. Adding servers made it worse. Here's why.

It's midnight, someone huge shares your app, 100,000 people show up — and the page dies. You add three servers. It gets worse .

• 100,000 users caused app crash at midnight
• Database bottlenecks revealed by request tracing
• Indexing query and caching recommended to optimize

2026-09-12 ·dev.to

Limited development

I just made an whole IDE that can be on phone,I am 17 years old and with no budget or helpers,I coded since I was 7,I had every serious limitations such as low hardware,no support, unanvaliable tools…

2026-09-12 ·dev.to

The EU Machinery Regulation applies on 20 January 2027, not 14 January

If you are building anything that puts a learned policy in charge of a safety function, the date you need is 20 January 2027. A lot of secondary sources say 14 January.

• EU Machinery Regulation delays to 20 January 2027
• Corrigendum corrects date from 14 January
• Annex I includes self-evolving safety components

2026-09-12 ·dev.to

My audit printed 0 of 0 and called it a pass

Three of the phases in my audit printed this: clusters=0 files=0 judged=0/0 open=0 claim=AHEAD verdict_file=absent Nothing had been examined. No verdict file existed.

• Audit phases reported as ahead with zero output
• Verdict of ahead declared despite empty run
• Proposed fix: add void state for unmeasured phases

2026-09-12 ·dev.to