Gavin Holtzapple

If you're a recruiter, VC, or founder, read my signals and spikes.

I'm a Software Engineer at Stripe, with previous experience at Coinbase, Cape, and others.

See my experienceView my projects

Professional Experience

Industry

Stripe · Software Engineer · 2026 - Present

Stripe

Software Engineer • April 2026 - Present • 6 months

My work includes Token Billing (now Metronome) and the AI Gateway (now Openrouter) products

Billing for LLM tokens

Bill for LLM tokens without building a pricing engine.

docs.metronome.com

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AI Gateway

Access and manage AI models through one gateway.

openrouter.ai

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Cape · Software Engineer · 2025 - 2026 · 8 Months
+ More experience
Stripe · Intern · Summer 2025 · 3 Months

Stripe

Intern • Summer 2025 • 3 Months

AI Agents to accelerate security reviews

Coinbase · Intern · 2024 - 2025 · 7 Months

Coinbase

Intern • Fall 2024 / Spring 2025 • 7 Months

Dealing with UNHNW customers

Walmart · Intern · Summer 2024 · 3 Months

Walmart

Intern • Summer 2024 • 3 Months

Working on Walmart Pay and Bluetooth Beacons

Rockwell Automation · Intern · 2023 - 2024 · 7 Months

Rockwell Automation

Intern • Fall 2023 / Spring 2024 • 7 Months

Adding testing suites to FactoryTalk software

Cigna · Intern · Summer 2023 · 3 Months

Cigna

Intern • Summer 2023 • 3 Months

Full stack CRUD internal tools

V Digital Services · Intern · Summer 2022 · 3 Months

V Digital Services

Intern • Summer 2022 • 3 Months

Web scraping projects

Writing

What I Learned During My First SWE Job

What I Learned During My First SWE Job

May 2026

Four lessons from my first software engineering job out of college.

Stop Needing Things

Stop Needing Things

March 2026

You don't need anything except yourself.

Predictions: 2026-2036

Predictions: 2026-2036

February 2026

Predictions for what industries will succeed over the next decade, & how AI will mature.

Claude Code is the Best Doctor I Never Had

Claude Code is the Best Doctor I Never Had

January 2026

How Claude Code can help patients understand themselves

How I built a 5G Core

How I built a 5G Core

January 2026

Potentially saving companies millions with a pet project

My Advice to Incoming College Freshmen

My Advice to Incoming College Freshmen

January 2025

4 pieces of advice from a college senior to incoming freshmen.

Open Source

Recent GitHub activity

@gholtzap · last six months

Large projects

Hydra

Hydra

Agent orchestrator for running and managing many Claude Code, Codex, and terminal sessions at once.

Ln1

macOS tools that help AI agents inspect apps, control the desktop, and record actions.

Hybrid X.509 Verifier

Research tool that checks whether certificate acceptance depends on post-quantum evidence.

Medium projects

lintapple

Makes it impossible for AI to make a bad UI

Nutritionmaxx

Nutritionmaxx

Improve your nutriton by using facts and logic.

Small projects

dot

dot

Simpler git for vibe coders.

react-ascii

react-ascii

React component library made entirely in ASCII.

Glorious O Eternal

Tool for configuring the Glorious Model O Eternal mouse.

Video

Video

Deterministic Finite Automata (DFA) Series

Practice problems and explanations for DFA concepts

Contact

gholtzap@gmail.comLinkedIn