Jon Willis

Full-stack Engineer - AI/Agents with expertise in effective AI Agents

I live in Los Angeles, CA, where I enjoy hiking with my dog, restorative gardening, tinkering with electronics, and over-engineering personal projects.

Skills at a Glance

Languages

TypeScript

Swift

Python

Rust

Kotlin

Java

General

Frontend Development

Startup Environments

Developer Experience & Tooling

Technical Leadership

Backend Systems

AI & ML

Agent Architectures

LLM Tracing and Evaluation

Retrieval-Augmented Generation (RAG)

Local Language Models

Ecosystems & Frameworks

React

Deno

Tailwind CSS

Apple Platform Development

Node.js

Web Browser APIs

Next.js

SwiftUI

LangChain

Tauri

Bun

Resume

Objective

Experienced engineer building production applications and agent architectures. I create intelligent, intuitive products that solve real problems while prioritizing user privacy and agency.

Experience

Stealth AI B2B Startup

Software Engineer - AI

Apr 2024 - Present

Leading design and implementation of an agent architecture powering core application features
Building an extensible agent tooling framework with strong typing, validation, and error correction mechanisms
Developing systems to integrate and analyze agent traces for comprehensive evaluation pipelines
Implementing hybrid LLM approach combining cloud and local models to optimize cost, performance, and privacy tradeoffs
Contributing across the full stack: Deno (AI app extensions), Swift/macOS (frontend), and CI/CD tooling

Agent Systems

TypeScript

Swift

Vercel AI SDK

MCP/Tools

Agent Evals

waggledance.ai

Solo Founder & Engineer

Jan 2023 - Apr 2024

Designed and developed an open-source agentic workflow automation platform similar to Deep Research
Architected a multi-agent system with DAG-based planning before reasoning-focused LLMs were widely available
Implemented parallel agent execution to achieve significant performance gains over traditional serial approaches
Built full-stack application using TypeScript with Next.js, LangChain.js, LangSmith, Prisma+Postgres, Weaviate, and Vercel

0→1 Product Development

Agent Systems

Next.js

LangChain

DAG-based Planning

Curtsy

Senior iOS Engineer

Mar 2021 - Dec 2022

Led comprehensive iOS app rebrand across a large codebase, improving maintainability through automated tests, documentation, and compile-time checking
Decreased crash rate by over 10x (from 99% to ≥99.9% crash-free sessions) for an app serving hundreds of thousands of monthly active users
Implemented TikTok-inspired video experience for product listings, enhancing user engagement and conversion rates
Identified and remediated a critical production security vulnerability affecting user accounts

iOS Development

SwiftUI

Combine Framework

R.swift

Application Security

Application Reliability

Code Maintainability

↓ "Other Experience" ↓

Pluto TV

Lead Mobile Software Engineer

Sep 2013 - Nov 2016

Joined as first mobile engineer at pre-seed stage and scaled through Series B (leading to $340MM acquisition by Viacom)
Led engineering team that designed and launched Pluto TV's app coinciding with the 4th generation Apple TV release
Architected and implemented the original Pluto TV applications across Android, Android TV, iOS, and Apple TV platforms
Built and mentored high-performing mobile and front-end engineering teams through rapid company growth
Collaborated with product designers and marketing teams to deliver apps that achieved App Store and Google Play features
Directed projects showcased at Google I/O 2015, increasing platform visibility and user adoption

iOS

Android

Fire TV

Apple TV

Team Leadership

0→1 Product Development

Other Experience

Find Your Grind

Lead iOS Engineer

Jul 2020 - Mar 2021

Rejuve, Inc.

Founding iOS Engineer

Jul 2019 - Jun 2020

Toot App, Inc.

Lead iOS Engineer

Jan 2018 - Jan 2019

Level11, Inc.

Consulting iOS Engineer

Jan 2017 - Jan 2018

Citrrus, Inc.

Software Engineer

Jun 2012 - Sep 2013

Education

Virginia Commonwealth University
Bachelor of Science in Computer Science
2012