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News
MySQL Overselling: Why SELECT Isn't Enough and How SELECT... FOR UPDATE Solves It
32+ min ago (431+ words) Imagine you’re running an online store, there’s exactly one item left in stock. Two customers click... Tagged with database, mysql, backend, softwareengineering....
Data Substrate Versus Vector Db Rag
23+ min ago (1246+ words) This week’s headlines highlight the rapid evolution of AI in China, with models like Qwen and DeepSeek pushing the frontier of capability. But as these models grow more sophisticated, the conversation around how data is stored, queried, and used as…...
My build went green and the permanent record kept almost none of it
17+ min ago (569+ words) A clean run at a release boundary. Every check green. Then the step that writes the run into the append-only record, and this: The run succeeded. The record of the run mostly does not exist. That is the part worth…...
Sixteen XORs and not a single if
30+ min ago (990+ words) Verbose is a small experimental language I build — its compiler proves properties about your code (termination, declared reads, sound types) and emits tiny x86-64 machine code: no runtime, no GC, no libc. Its emitted binaries already compute the TLS 1.3 cryptography for…...
Two Transactions, One Row: What Does MySQL Actually Let You See?
33+ min ago (554+ words) Two users, One database row, Both reading and writing at almost exactly the same time. Who sees... Tagged with database, mysql, softwareengineering, backend....
Se acabó el limite de los 15 minutos: un análisis a fondo del tiempo de espera de 90 minutos de AWS Lambda
13+ min ago (25+ words) Hace 4 días vi un anuncio que me parecio muy interesante es que ya se incremento 6x el timeout de las... Tagged with aws, lambda....
My check ran green every time and its result could never reach the thing that needed it
17+ min ago (491+ words) An acceptance report reads one cell per unit. For weeks it read the same thing on every single unit: absent is not a failure. It means the acceptance step looked for a result and found nothing there. Meanwhile the check…...
SOLID Design Principles: The 5 Rules That Make Your Code Easier to Maintain
47+ min ago (429+ words) Good code isn't just code that works. It's code that can be changed, tested, and extended without breaking everything around it. That's where SOLID comes in. SOLID is a set of five object-oriented design principles that help you write software…...
My determinism check can only test one producer in seven, and the print says so
50+ min ago (545+ words) I added a check that asks one question: run the thing that produces this record twice, and do you get the same bytes? One of seven. That number is not a coverage gap I plan to close. It is the…...
🤖 How Backend Engineers Are Building AI-Powered Applications in 2026
1+ hour, 1+ min ago (116+ words) AI isn’t only about training models. For backend engineers, the real challenge is building reliable systems around AI. A typical AI-powered backend might look like: 🌐 Client → sends request ⚙️ Backend API → validates & processes it 🤖 LLM → generates the response 🗄️ Database → stores application…...