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⚡ AI Lessons

Dev.to · Eugene
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Inside PostgreSQL MATCH Queries: Syntax, Paths, and Parameters with pg_igraph
Inside PostgreSQL MATCH Queries: Syntax, Paths, and Parameters with pg_igraph Cypher-like...

Dev.to · Eugene
🏗️ Systems Design & Architecture
1mo ago
Single-flight caching: how one hot key stops taking the database down
On podbor-minuta.ru some database queries are heavy, so we keep their results in a cache: apartment lists, aggregate numbers for listing pages. While the…

Dev.to · Eugene
🔧 Backend Engineering
1mo ago
Keeping junk out of programmatic geo pages: an allow list for metro, a block list for districts
Scraped metro and district fields were polluted with walk times and project names. How a station allow list and a junk block list removed about 193 thin pages.

Dev.to · Eugene
🔧 Backend Engineering
1mo ago
ENAMETOOLONG: how one dirty database field crashed our static build
One scraped field held a 295-character sentence. The page generator turned it into a directory name and the static build crashed with ENAMETOOLONG.

Dev.to · Eugene
💻 AI-Assisted Coding
⚡ AI Lesson
1mo ago
Your AI Coding Agent Is LYING When It Says "Done"
TL;DR When an AI agent changes few files, runs few tests, and says "Done", is it really...

Dev.to · Eugene
🔧 Backend Engineering
⚡ AI Lesson
1mo ago
Test Email OTP Flows in Playwright Without a Shared Gmail Inbox
Give every Playwright run a unique email address, poll a catch-all test inbox, and assert the exact OTP message.

Dev.to · Eugene
📣 Digital Marketing & Growth
⚡ AI Lesson
1mo ago
Test Stripe Webhooks Without Running a Local Server
Inspect Stripe sandbox deliveries on a persistent HTTPS endpoint, query them over MCP, and build a signature-verifying handler.

Dev.to · Eugene
🔧 Backend Engineering
⚡ AI Lesson
3mo ago
🚀 I Built UUIDs That Look Random But Sort Like Timestamps (50% Smaller Indexes!)
How steganography solved the eternal UUID performance vs privacy dilemma in PostgreSQL

Dev.to · Eugene
📐 ML Fundamentals
⚡ AI Lesson
4mo ago
Stop Guessing Which Weights Your Neural Network Actually Learned: Deterministic Initialization That Tracks Every Change
A novel approach to weight initialization that lets you track exactly which parameters changed during training, enabling 60-70% safe pruning with zero quality l

Dev.to · Eugene
🔧 Backend Engineering
⚡ AI Lesson
4mo ago
Your PostgreSQL Already Has a Graph Engine — You Just Have to Build It
We Replaced Recursive CTEs with a C Traversal Framework and Got ×207 Faster TL;DR: We...

Dev.to · Eugene
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4mo ago
pg_ilib: Compact Typed Binary Serialization for PostgreSQL
A PostgreSQL C extension that encodes any SQL value into a compact bytea with a 2-byte typed header — and decodes it back without knowing the type in advance.

Dev.to · Eugene
🔧 Backend Engineering
⚡ AI Lesson
5mo ago
JSON vs JSONB in PostgreSQL: I tested 1M rows to find out
Recently I tried to resolve a recurring question in our team: Is JSON or JSONB actually faster in...
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