Search architecture and relevance engineering, from concept to measurable results.

I am Jason Stubblefield, a search and discovery leader with more than twenty years across the full search stack. I design and ship production search platforms on OpenSearch, Elasticsearch, and Solr, with deep hands-on experience in vector retrieval, RAG pipelines, relevance experimentation, and LLM-assisted ranking. This site expands on my professional work: the research platforms I build, the open source tools I maintain, and my writing on search architecture.

Git as the CMS: How This Blog Publishes Itself

Why I publish this blog by committing markdown to a git repository instead of running a blog server, and how the pipeline keeps the site up even when everything else is down.

Areas of Expertise

  • Search Architecture: OpenSearch, Elasticsearch, and Solr Cloud at scale
  • Vector Retrieval: KNN, embeddings, and visual search
  • RAG Pipelines and LLM-Assisted Relevance Tuning
  • Relevance Experimentation and A/B Testing
  • Cloud Infrastructure: AWS, GCP, Terraform, and Ansible
  • Engineering Leadership and Team Building