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johncarmack1984/README.md

John Carmack

AI/LLM and geospatial/GPU software engineer. Rust and TypeScript. I build production LLM systems, GPU map rendering, and the cloud infrastructure that runs them. Lately: primary author of a safety-critical aviation flight-planning desktop app, lone architect of a real-time analytics platform. Remote, based in Waco, TX.

Not the Doom guy. Different guy.

What I build

  • Production AI/LLM applications - schema-validated data extraction, LLM gateways, structured output, and the eval harnesses that keep them honest.
  • High-performance maps and GPU/geospatial - deck.gl, luma.gl, MapLibre, WebGL, vector tiles and PMTiles.
  • Aviation software - safety-critical flight planning and dispatch, on the desktop.
  • Rust systems and cloud - Axum/Tokio services, type-safe Rust to TypeScript, serverless on AWS (Lambda, CDK), infrastructure-as-code.

Featured work

AI / LLM

  • llm-extract-evals - schema-validated LLM data extraction with a confidence-gated evaluation harness: accuracy scoring and offline replay.
  • promptward - an LLM gateway that catches prompt injection and data exfiltration, validates structured output, and meters cost. The eval harness proves the detection rate.

Geospatial / GPU

  • stormdeck - live weather on a deck.gl map, vector tiles served from AWS Lambda on the free tier.
  • deck-wind-layer - a custom deck.gl v9 layer: GPU-advected wind particles over a moving map.
  • glslint - a GLSL checker and language server that understands deck.gl/luma.gl shader modules (Rust).

Rust / systems

  • typed-geojson - strongly-typed GeoJSON for Rust (Feature<G, P> / FeatureCollection), specta-compatible.
  • specta - contributor to specta-rs, exporting Rust types to TypeScript.
  • accept-payments - a payments and invoicing API in Rust/Axum on the AWS Lambda Rust runtime.

Stack

Rust, TypeScript, React, Next.js, Node, Tauri, Python | deck.gl, luma.gl, MapLibre, WebGL, D3 | Axum, Tokio, Snowflake, PostgreSQL | AWS (Lambda, CDK), Terraform, GitHub Actions | LLM/AI: extraction, evaluation, structured output

Reach me

johncarmack.com | linkedin.com/in/johncarmack1984

Pinned Loading

  1. promptward promptward Public

    LLM gateway that detects prompt injection and data exfiltration, validates structured output, and meters cost -- with an eval harness that proves the detection rate. Wire-compatible with OpenAI/Ant…

    TypeScript

  2. fltsci/tauri-plugin-tracing fltsci/tauri-plugin-tracing Public

    Logging for tauri using the tracing crate

    Rust 11 3

  3. glslint glslint Public

    luma.gl/deck.gl-aware GLSL checker + language server

    Rust

  4. llm-extract-evals llm-extract-evals Public

    Schema-validated LLM extraction with an eval harness: structured outputs, retries, and a failure taxonomy (correct/missing/wrong/hallucinated). Grid-interconnection docs as the worked example.

    TypeScript

  5. stormdeck stormdeck Public

    Live weather on a deck.gl map, served from AWS free tiers

    Rust

  6. lux lux Public

    RGBAW DMX lighting controller — drives an Enttec Open DMX USB or sACN/Art-Net network node (auto-detected). Built with Rust, Tauri, and shadcn/ui.

    Rust 2