Work
What I can show. Most client work is private.
Current ventures
Founder — CTO Practice
Active
2Lines Software
Mid-market CTO practice for CEOs and boards who want their technology investment to produce intellectual property, not just technical debt. Fractional CTO, diagnostics, technical due diligence, and board advisory.
Visit →Founder — AI Products
Active
Discontinuity.ai
AI/ML consultancy and infrastructure-as-a-service platform focused on rapid development. Helping companies adopt AI in ways that actually ship.
Visit →Founder — Investments
In development
1864 Ventures
Lower-middle-market investment fund, focused on building capabilities and scaling companies.
Visit →Open source & projects
More at github.com/johncarpenter.
Open source
Active
trajectory-memory
An RL-inspired tool for Claude Code projects. Learns from session trajectories and optimizes CLAUDE.md and skills over time — persistent learning without touching model weights.
Visit →Open source
Active
sorkit
MCP client implementing the Surface-Oracle-Ratchet code optimization technique. A practical tool built from the pattern described in the Karpathy autoresearch analysis.
Visit →Open source
Active
adaptive-simple-text-classifier
Self-building hybrid classifier that combines FAISS embeddings with LLM fallback and a feedback loop. Starts with zero training data and improves with use.
Visit →Open source
Active
claude-code-resources
Opinionated collection of scripts, skills, and configuration for speeding up Claude Code workflows.
Visit →Open source
Experimental
agent-container-template
Template for deploying a Claude Code local folder as an API within Google Cloud Run. Experimental infrastructure for agent-as-a-service.
Visit →Research
Research
Self-Driving Car Research
ML model for visual lane identification and tracking for self-driving cars. An early exploration of computer vision applied to autonomous vehicle navigation.
Visit →Professional history
For the full timeline, see LinkedIn.
CTO
2019–Present
BlackSquare Inc
E-commerce and data platform for the alcohol industry. Built and led the technology team through product-market fit and scale.
CTO — Acquired
2013–2014
Decisive Farming
Precision agriculture platform. Led technology through growth and acquisition.
CTO — Acquired
2009–2015
Mob4Hire
Mobile crowdtesting platform. One of the first mobile QA marketplaces, grew from founding team to acquisition.