Hello 👋

I'm John, a full stack engineer and system administrator with over 25 years of experience building and operating SaaS products. I write articles and tutorials about software development and infrastructure. My areas of expertise include:

  • Ubuntu Linux operating systems
  • Apache and Nginx web servers
  • PostgreSQL databases
  • Python, PHP, and Javascript scripting languages
  • SaaS infrastructure and DevOps automation
  • Product design and technical strategy
  • Email deliverability, including DMARC, SPF, and DKIM

Recent articles