I’m Alexander, a software engineer and consultant based in The UK. I’m the founder of Keliris Consulting, where we help enterprises build modern, fast and reliable software.https://keliris.dev/https://keliris.dev/articles/auth0-and-crossoriginisolated/https://keliris.dev/articles/auth0-and-crossoriginisolated/When `crossOriginIsolated` is enabled, the Auth0 `loginWithPopup` method fails with an error. This article explains the error and suggests a workaround.Mon, 25 Sep 2023 00:00:00 GMThttps://keliris.dev/articles/aws-apigw-https-proxy/https://keliris.dev/articles/aws-apigw-https-proxy/A serverless solution for HTTPS, when you can't easily setup your own SSL termination.Mon, 27 Apr 2020 00:00:00 GMThttps://keliris.dev/articles/boids/https://keliris.dev/articles/boids/An interactive simulation of flocking behavior using the Boids algorithm, implemented with p5.js. Explore how simple rules create complex emergent behavior through adjustable alignment, cohesion, and separation controls.Thu, 20 Feb 2025 00:00:00 GMThttps://keliris.dev/articles/codecrafters-build-your-own-redis/https://keliris.dev/articles/codecrafters-build-your-own-redis/My experience building my own in toy Redis implementation in Rust, following the CodeCrafters course.Thu, 23 Mar 2023 00:00:00 GMThttps://keliris.dev/articles/deep-note/https://keliris.dev/articles/deep-note/I recreated the iconic THX "Deep Note" using JavaScript and the Tone.js library. Here's how I did it.Fri, 05 Jul 2024 00:00:00 GMThttps://keliris.dev/articles/how-to-add-custom-shiki-theme-to-astro/https://keliris.dev/articles/how-to-add-custom-shiki-theme-to-astro/Shiki makes use of vscode themes and Astro allows you to easily customise the Shiki config for markdown.Thu, 09 Nov 2023 00:00:00 GMThttps://keliris.dev/articles/improving-spotify-tui/https://keliris.dev/articles/improving-spotify-tui/In previous versions of spotify-tui, there was a major issue that caused the UI to freeze and not respond to user key events. The solution? Don't block the main event loop 😅.Thu, 12 Mar 2020 00:00:00 GMThttps://keliris.dev/articles/javascript-filter-map/https://keliris.dev/articles/javascript-filter-map/`filter` and `map` are two of the most commonly used array methods in JavaScript. But what if you want to filter and map in one iteration?Fri, 02 Feb 2024 00:00:00 GMThttps://keliris.dev/articles/lazyvim/https://keliris.dev/articles/lazyvim/After maintaining an elaborate vim config for years, LazyVim is a breath of fresh air.Tue, 28 Feb 2023 00:00:00 GMThttps://keliris.dev/articles/lightweight-templating-in-ci/https://keliris.dev/articles/lightweight-templating-in-ci/Sometimes you need to substitute values in a structured text file and envsubst might just be the utility you need.Thu, 26 Oct 2023 00:00:00 GMThttps://keliris.dev/articles/lute-search-refinements/https://keliris.dev/articles/lute-search-refinements/Improved lute music search allowing the user to filter by composer, type of piece, and key, in addition to using date and difficulty ranges besides general search.Wed, 16 Aug 2023 00:00:00 GMThttps://keliris.dev/articles/meilisearch/https://keliris.dev/articles/meilisearch/MeiliSearch is a superb solution for search, rivalling Elastic Search and Algolia. This post outlines one way of deploying your own instance to AWS.Fri, 17 Apr 2020 00:00:00 GMThttps://keliris.dev/articles/rigel-theme/https://keliris.dev/articles/rigel-theme/Inspired by the bright blue star in the constellation of Orion.Sun, 11 Aug 2019 00:00:00 GMThttps://keliris.dev/articles/setup-rust-github-actions/https://keliris.dev/articles/setup-rust-github-actions/I like to set up CI for nearly all my side projects, here is how I set it up for Rust.Wed, 08 Nov 2023 00:00:00 GMThttps://keliris.dev/articles/shades-of-purple-vim/https://keliris.dev/articles/shades-of-purple-vim/Despite not using VSCode, I saw one of my colleagues using the shades-of-purple, and I loved it!Thu, 11 Jul 2019 00:00:00 GMThttps://keliris.dev/articles/spotify-tui/https://keliris.dev/articles/spotify-tui/When coding, I want to stay in the terminal as much as I can. So I built Spotify for the terminal.Tue, 15 Oct 2019 00:00:00 GMT