Hello! I'm Seth Hobson, a software engineer with more than 15 years of experience building data applications, services, and distributed systems, mostly in finance and AI.

I'm currently building QueryPlan, where you learn SQL by running queries in the browser and reading their execution plans. The query plan visualizer is free, and you don't need an account to use it.

• Senior AI Engineer, United Data Technologies (2025 to present)
• Founder, Major 7 Apps LLC (2024 to present)
• Senior Software Engineer, Kuali Inc. (2021 to 2023)
• Senior Software Engineer, Apple Inc. (2015 to 2021)
• Software development and web technologies (2009 to 2015)

• Software engineering
  • Software architecture and design
  • Full-stack development in Python, JavaScript, TypeScript, SQL, Go, C, and Rust
  • APIs with REST, GraphQL, gRPC, MCP, and A2A
• AI and LLMs
  • Building AI, ML, and LLM features into applications
  • Improving LLM results with RAG, agentic RAG, supervised fine-tuning (SFT), and RAFT
• Data and infrastructure
  • Database design for relational and NoSQL databases
  • Data pipelines, data analysis, and visualization
  • Cloud and distributed systems on Azure and AWS, managed with Terraform

• Master of Music in Vocal Performance, Indiana University Bloomington
• Bachelor of Science in Computer Science, Appalachian State University
• Bachelor of Music in Vocal Performance, Appalachian State University

The Agentic Plugin Marketplace is a set of plugins for AI coding tools, and the plugins hold agents, skills, and commands. You install only the plugins you need, and each plugin loads only its own files into the model's context. I built it for Claude Code, and the same Markdown source also works in OpenAI Codex CLI, Cursor, OpenCode, Antigravity CLI, GitHub Copilot, and Pi.

Maverick MCP is a stock analysis MCP server that runs on your own machine and works with any MCP client. Its core tools cover market data, technical analysis, stock screening, and portfolio tracking, and none of them need an API key. Optional extras add strategy backtesting and research that uses an LLM.

Tiingo MCP is an MCP server for the Tiingo financial data API, and I wrote it in Rust with rmcp. It has 38 tools for stocks (EOD, IEX, and consolidated prices), funds, forex, crypto, news, fundamentals, and corporate actions, and it can also open short-lived real-time market data subscriptions. The server also includes 3 resources, a resource template, and 5 prompts. You can install it from crates.io or with a prebuilt installer.

I write AI Primitives, a newsletter about the infrastructure that production AI agents run on, e.g., orchestration, memory, evaluation, and identity.