About
Now, and before
I am a machine learning engineer at Amazon AGI in Sunnyvale. I designed and built Reinforcement Fine-Tuning for Amazon Nova: the customization path that lets enterprise teams train frontier models on their own data, on SageMaker HyperPod. It shipped in the AWS re:Invent 2025 CEO keynote. Day to day that means SFT, DPO, PPO, and GRPO, plus the stacks underneath them — NeMo, VERL, vLLM, PyTorch Lightning.
Before AGI I was on Route 53, where I owned ML-powered threat intelligence for the resolver fleet: detectors fast enough to sit inline on the query path, heavier async models for signature work, and the plumbing that pushes every verdict across a global fleet in real time. That fleet answers trillions of DNS queries a day, which is a good place to learn that "probably fine" is not a number. Along the way I shipped DNS Firewall features, contributed to Route 53 Profiles, and automated away about 1,200 engineer-hours of fleet work a month.
The apps are where I test my own opinions about products. Suelto, PostureMaxx, and hey, did you are live on the App Store; Proof is still on the bench. All of them are small, opinionated, and built to survive contact with a normal person's Tuesday.
The writing is how I find out what I actually think. Every essay here started as an argument with myself about what models should remember, what they should retrieve, and when good enough should ship.
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Apr 2025 to present · Sunnyvale
Machine Learning Engineer
Amazon AGI
Reinforcement Fine-Tuning for Amazon Nova, used across SageMaker and Bedrock. Led a team of three through delivery. Announced at the Re:Invent 2025 CEO keynote, opening custom frontier-model training on HyperPod. Work across SFT, DPO, PPO, GRPO, plus NeMo, VERL, vLLM, and Lightning.
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Aug 2022 to Mar 2025
Software Development Engineer II
Amazon, AWS · Route 53
Owned threat intelligence for the resolver dataplane. Inline and async models, realtime distribution across a global fleet, DNS Firewall, Profiles, and automation that cut about 1,200 engineer-hours a month. Led five engineers. Ran 40+ L4-L5 interviews.
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May 2022 to Aug 2022 · Washington, D.C.
Software Engineer, Mobile
TRED
Built the mobile app from scratch on a team of three. React Native, AWS, Firebase, Stripe, GraphQL, Redux.
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2016 to 2022 · Washington, D.C.
Information Technology Consultant
Office IT Solutions
Technology for 15+ clients: web and application development, plus the marketing stack around it. Led a team of three consultants.
Past businesses
2019 to 2021
Urbu
A DTC brand that reached 10k customers in 10 countries and grew 50% year over year before a small acquisition.
2019 to 2020
Desktrak
Racetrack silhouette sculptures for about 15k customers and a set of track partners, with JIT inventory manufactured in China.
B.S. Computer Science, University of Maryland, 2021. A.S. Computer Science, magna cum laude, Frederick Community College, 2015.