Anomaly detection with isolation forest and robust thresholds

Anomaly detection is mostly about defining normal behavior well enough that deviations matter. I usually combine a model like IsolationForest with feature windows and operational thresholds that the business can interpret. Without that calibration, an

Advanced query optimization techniques

Query optimization maximizes performance through efficient execution plans. I analyze queries with EXPLAIN ANALYZE. Understanding sequential scans vs index scans guides optimization. Join order affects performance dramatically. Subquery optimization v

Grafana dashboards as code with JSON provisioning

Grafana visualizes Prometheus metrics through configurable dashboards. Dashboard JSON models define panels, queries, and layouts programmatically. Panel types include timeseries for graphs, stat for single values, table for tabular data, and gauge for

Laravel mix/Vite for asset compilation

Laravel Vite (replacing Mix) compiles and bundles frontend assets with hot module replacement during development. I define entry points in vite.config.js—typically resources/js/app.js and resources/css/app.css. The @vite directive includes compiled as

OpenCV image preprocessing for OCR and vision pipelines

A lot of computer vision performance comes from cleaner inputs rather than larger models. I use OpenCV for resizing, denoising, thresholding, and contour extraction when preparing images for OCR or downstream classification. These classical steps ofte

S3 bucket policy that enforces TLS and blocks public reads

Public cloud storage needs explicit safety rails because the defaults are not enough by themselves. I deny insecure transport, block public access at the account level, and scope principals tightly. Storage mistakes are still one of the easiest ways t

ActiveStorage for file uploads and attachments

ActiveStorage handles file uploads with cloud storage integration. It supports local disk, S3, Google Cloud Storage, Azure. Files attach to models via has_one_attached and has_many_attached. I use ActiveStorage for avatars, documents, images. Image va

Secure webhook endpoint design with replay protection

A webhook endpoint is an internet-facing parser plus an authentication problem. I verify signatures, enforce recent timestamps, and store event IDs to block replay attempts. Reliability matters too, so handlers should be idempotent and fast to acknowl

Performance optimization and profiling

Android performance optimization ensures smooth 60fps UI and efficient resource usage. I use Android Profiler to monitor CPU, memory, network, and energy. Layout Inspector identifies overdraw and deep view hierarchies. Systrace captures system-level t

Static application security testing with Semgrep in CI

SAST is most useful when rules are actionable and fit the stack. I use Semgrep to catch dangerous patterns like command injection, weak crypto, SSRF sinks, and raw SQL interpolation. The signal stays high when teams tune rules and suppressions deliber

Custom SwiftUI view modifiers for reusability

View modifiers encapsulate reusable styling and behavior in SwiftUI. Creating custom modifiers keeps views clean and promotes consistency. I define modifiers by conforming to the ViewModifier protocol, implementing body(content:) that transforms the c

Secure random token generation for sessions and recovery flows

Predictable tokens become account compromise. I use cryptographically secure randomness, store only token digests when possible, and keep token purpose and expiry specific. Reset tokens, magic links, and API secrets should all be treated like credenti