https://blog.iaroslavtsev.uk/posts/Recent content in Posts on The Pragmatic EngeneerHugo -- 0.152.2en-us2025 Aleksei IaroslavtsevFri, 03 Oct 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/functional-options-for-friendly-apis-in-go/Fri, 03 Oct 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/functional-options-for-friendly-apis-in-go/Inspired by Dave Cheney’s classic post, this article explores how the functional options pattern can make your Go APIs cleaner, more extensible, and a joy to use, demonstrated with a practical example.https://blog.iaroslavtsev.uk/posts/a-guide-to-full-stack-rails-optimization/Wed, 27 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/a-guide-to-full-stack-rails-optimization/A deep-dive case study on optimizing a Rails app, tackling everything from slow data imports (using bulk inserts) to sluggish page loads (fixing N+1 queries and adding database indexes). We cut import times by 40% and page loads by over 90%.https://blog.iaroslavtsev.uk/posts/a-deep-dive-into-ruby-concurrency-case-study/Wed, 27 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/a-deep-dive-into-ruby-concurrency-case-study/An architectural breakdown of solving a concurrency challenge in Ruby, moving from a naive sequential model to a robust, scalable pattern using structured concurrency.https://blog.iaroslavtsev.uk/posts/from-hours-to-seconds-a-systematic-guide-to-ruby-performance-optimization/Wed, 27 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/from-hours-to-seconds-a-systematic-guide-to-ruby-performance-optimization/A step-by-step walkthrough of how we optimized a Ruby script that was too slow to run, reducing its runtime to under 30 seconds using a methodical, profile-driven approach.https://blog.iaroslavtsev.uk/posts/taming-rubys-memory-bloat-a-guide-to-processing-large-files/Wed, 27 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/taming-rubys-memory-bloat-a-guide-to-processing-large-files/A case study on how we reduced the memory footprint of a data-processing Ruby script from over 200MB to under 70MB by ditching CSV.read and adopting a streaming, batch-processing approach.https://blog.iaroslavtsev.uk/posts/museum-night-api-reverse-engineering/Sun, 17 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/museum-night-api-reverse-engineering/A step-by-step guide on how I reverse-engineered the booking website’s private API to build a Ruby script that instantly finds available tickets for Berlin’s popular Museum Sunday.https://blog.iaroslavtsev.uk/posts/car-rental-project-case-study/Sun, 17 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/car-rental-project-case-study/A detailed walkthrough of how our team of six built a car rental website from scratch, focusing on our goals, technology stack, and the features we implemented, including an advanced integration with rental management software.https://blog.iaroslavtsev.uk/posts/how-we-analyze-blog-traffic/Sun, 17 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/how-we-analyze-blog-traffic/A deep dive into my custom, privacy-friendly blog traffic analysis system built with a Go authentication service, Nginx Ingress, OpenTelemetry, and SigNoz for powerful observability.https://blog.iaroslavtsev.uk/posts/how-this-blog-is-hosted/Sun, 17 Aug 2025 00:00:00 +0000https://blog.iaroslavtsev.uk/posts/how-this-blog-is-hosted/A complete walkthrough of the infrastructure powering this blog, built on a free Oracle Cloud account, managed with Terraform, and deployed to Kubernetes with full observability using SigNoz.