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Founder & developer, Echo Sierra Studio
Sem Postma
Sem builds fast, modern websites and apps on serverless tech (React, TypeScript, Cloudflare). Alongside client work he builds Laika CMS and side projects like Cast to Sonos, and writes about the engineering behind our projects.
Profiles
Articles by Sem
- Leveraging Graph RAG to Fix LLM Hallucinations Where Facts Can't Be Wrong
- Develop an internal tech support chatbot with Database and FileSystem integration
- General-purpose GPU programming without compute shaders
- Using AI to detect fraud
- A guide to implementing a binary format
- Creating a binary storage format
- Troubleshooting common issues with composite indexes in SQL databases
- Eliminating full table scans for paginated SQL queries
- Binary Heaps with Javascript
- A complete guide to tracking events with GA4 & BigQuery
- Launch of Cast to Sonos
- S3 Not passing correct CORS headers to Cloudfront
- Want to turn your WordPress website into an app?
- Using React Ionic in production
- Illustrator Script Installer
- Authenticating Firebase JWT Tokens
- Batch exporting Adobe Illustrator data sets
- Key value wrapper around IndexedDB
- Export an Illustrator file to all important file formats
- Editing Netlify CMS config.yml from Netlify CMS without plugins
- Markdown viewer for windows
- All about debouncing, throttling and batching
- Mindviewer - Create multi-user realtime editable mindmaps
- The real guide to creating a website with free hosting (2019)
- Downloading, saving and opening files with Cordova
- A* Pathfinding in Javascript
- html2js-loader tutorial
- html2js-loader
- Create draggable elements with Javascript
- Lazy loading images with Javascript
- Creating an Atom feed reader with Javascript
- Base Converter
- Creating a Javascript spellingchecker with bjspell
- Converting JSON from and to XML in Javascript
- Pure CSS Progress Circles
- Converting JSON to CSV in Javascript
- Teaching a Neural Network to write text