Building a Perceptual Hash Pipeline for Video Deduplication in Python
A single viral clip never stays a single file. Within hours of a video trending, our crawlers pull the "same" clip back a dozen times: re-encoded at a…
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Stop Using Round-Robin: High-Throughput Java Virtual Thread Routing with P2C
Stop Using Round-Robin: High-Throughput Java Virtual Thread Routing with P2C Virtual threads allow Java microservices to comfortably run 50,000 concur…
My STL Post Sparked a Real Discussion — Here's Where It Landed
Algorymer came back with more thoughts after the AoC article. The conversation drifted from "which container to use" to something bigger: is the tool …
39,000 Torrents: The Bug My Green Benchmark Never Caught
[Torrent911] Inception.2010.TRUEFRENCH.1080p.BluRay.x264-YIFY That's a real filename. The goal: extract "Inception" and "2010" from it, query the TMDB…
Teaching a phone to disbelieve its own GPS
The bug report came in on a Tuesday. One line: "Your app says I hit 400 kmph. I was at a red light." He wasn't lying. Neither was the app. The phone g…
Big O for the Impatient: Why Your Loop Is Slow (and When It Matters)
The page loads in 80 ms locally. In prod, on the real database, it takes 9 seconds and freezes the tab. The code did not change. The data did: 60 test…
Deterministic Wrong: Why a Viral Web Toy Must Be Wrong the Same Way Every Time
A calculator that gives you 2+2=7 and your friend 2+2=5 is just a broken calculator. Nobody shares it. Nobody argues about it. Nobody screenshots it a…
Building a Polymarket Trading Bot: Order Book Monitoring, Slippage Handling, and Position Sizing in Python
Why naive orders lose money on Polymarket Most people's first Polymarket bot places a market order and calls it done. That works fine on liquid, high-…
Palette quantization notes: reducing colors without making an image muddy
I’ve been thinking about a small image-processing problem lately: how to reduce an image to a limited palette without making it look muddy. This comes…
How to Backtest a Trading Strategy with Python and EODHD API
Most backtests lie to you. Not intentionally. But they lie. You design a strategy, run it on historical data, and watch the returns look incredible. T…
Every hand is solvable: engineering a block puzzle that never cheats
Block puzzles — the 8×8 "place three pieces, clear lines" genre — share a dirty secret: sometimes the game simply deals you pieces that cannot fit any…
Morris Pre Order Traversal
Problem Statement Given the root of a binary tree, return its preorder traversal. The challenge is to perform the traversal: Without Recursion Without…
Sorting in Python
Sorting is a fundamental operation in computer science and programming. Whether organizing data for analysis, building efficient algorithms, or enhanc…
Algorithmic Entity Resolution in Music Metadata
In the global streaming economy, Spotify, Apple Music, and other DSPs process billions of plays daily. Behind this massive transaction layer lies a fr…
Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet
Claims of "security" are everywhere, but very few chat APIs actually walk the walk. Most offerings fall apart under a true zero-trust audit because th…
dev.to How Online Casinos Prove Their RNG Is Fair, and Why Most Software Can't
Math.random() returns a number between 0 and 1, and roughly nobody reading this could explain what happens between the call and the return. That is fi…
A Shortest-Path CLI in Rust — Making a Min-Heap from a Max-Heap, Path Reconstruction, and Rejecting Negative Weights
A CLI that finds shortest paths in a weighted graph, in Rust, with Dijkstra's algorithm. Three implementation hinges: (1) Dijkstra needs a min-priorit…
Temporal ranking finally gaining fruit.
I'm trying to teach my agents what "now" means. Here's how far I've gotten. Immanuel Gabriel Immanuel Gabriel Immanuel Gabriel Follow Jun 20 I'm tryin…
The 15 LeetCode patterns that cover ~90% of coding interviews
Grinding 500 LeetCode problems is the slow way to prep. The fast way is pattern recognition — because most interview questions are a remix of ~15 unde…
[System Design] Ride-Hailing Dispatch Algorithm: How Uber DISCO & Grab DispatchGym Match Drivers
Every time you tap "Book Ride," a system makes dozens of decisions in under two seconds: Which driver? What route? What's the real ETA? This article b…
Three decisions behind a music-to-curator matching score
I build OTONAMI , a pitch platform that connects independent artists with music curators — playlist editors, radio DJs, bloggers, label scouts. At its…
Hashing in Distributed Systems: A Complete Guide to Algorithms, Best Practices, and Real-World Applications
Have you ever wondered how Discord keeps your channel messages available even when a server goes down? Or how Amazon DynamoDB serves petabytes of data…
A Practical Guide to the ROS Navigation Stack: Core Components & Tuning
With rapid advances in robotics, autonomous navigation has become essential for mobile robots. The ROS Navigation Stack is the de facto open-source fr…
Top 5 Data Visualizations for Algorithmic Trading (With Python Code)
Top 5 Data Visualizations for Algorithmic Trading (With Python Code) Most algo traders write signals. Almost none visualize them correctly. You can ha…
The Algorithmic Yes-Man: Why AI Constantly Agrees with You
It can feel a bit eerie when an artificial intelligence system effortlessly nods along with your ideas, validates an unconventional opinion, or gently…
I read the X (Twitter) algorithm source for 4 days and built a Claude Code sub-agent that scores drafts before posting
Twitter's recommendation algorithm has been open-source since March 2023. I spent four days reading it. Here's what those four days taught me — and th…
Galileo Gosling the father of Java
Before Getting into development straight away. We must learn the origin the customs and the way of Java Right from the start. We must start first with…
Claprec: Machine Learning in Practice (4/6)
Series Roadmap Product Overview (1/6) Architecture: N-Tier Design, Decoupling, and Microservices (2/6) Frontend: Angular, NgRx, and OpenAPI Integratio…
How I Built a Vedic Panchang Engine in TypeScript — Swiss Ephemeris, Meeus Fallback, Zero External APIs
Sub-arcsecond planetary positions, sunrise for any location on Earth, and an entire astronomical calendar — all computed server-side in a Next.js app.…
Python list Internals: How Dynamic Arrays Work Under the Hood
A Python list is a capacity-adaptive linear container backed by a dynamic array . This design gives list excellent performance for tail operations, bu…