Technologist · Builder · Pilot
Daniel
Keller
25+ years building tech products. Currently exploring GenAI-native development, longevity optimization, and flying across Europe in a Cirrus SR22T.
Product & Tech
Side projects like SortFlex and NutriSpan, GenAI-native development with agentic workflows, and lessons from 25+ years of building tech products across four exits.
Longevity
Optimizing health span through six pillars — sleep, exercise, nutrition, mental health, biohacking, and risk avoidance.
Flying
A decade of private flying — EASA & FAA PPL, Instrument Rating, cockpit GoPro footage, and adventures across Europe in a Cirrus SR22T based out of Schönhagen.
25+
Years in Tech
4
Exits
$1.6B+
Exit Value
10+
Years Flying
IR
Instrument Rated
Latest Updates
From Terminal to Factory — Running Headless AI Agents 24/7
The step-by-step guide to transitioning from local Claude Code sessions to persistent, headless backend agents you control from your phone. Dispatch, remote control, agent teams, and event-driven automation.
Read moreThe Perfect CLAUDE.md for Enterprise Software Engineering
How I use CLAUDE.md files to encode engineering excellence standards — turning tribal knowledge into enforceable, AI-augmented guardrails for building enterprise-grade SaaS.
Read moreRunning Local LLMs — Qwen3-Coder, DeepSeek, MLX, and Apple Silicon
A practical guide to running powerful language models locally on Apple Silicon — model selection, MLX vs Ollama, quantization trade-offs, and when local beats cloud.
Read moreAgentic Development Patterns — Building Software with AI Agents
Practical patterns and workflows for agentic software development using Claude Code, Cursor, and local LLMs — from parallel workstreams to overnight agent factories.
Read moreNutriSpan — Gamifying Longevity Science
A React Native app that turns longevity optimization into a game — with a Longevity Impact Score, 1,000+ food database, daily checklists, streaks, and achievements grounded in peer-reviewed science.
Read moreSortFlex — 3D Configurator for Custom Holders & Mounts
A browser-based 3D design tool for custom holders, organizers, and mounts. Drag and drop everyday items onto a base plate, then 3D print at home or order a printed version shipped to your door.
Read more