Fred Hatfull
Principal Software Engineer at Aiwyn
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolFred Hatfull is a Principal Software Engineer based in San Francisco who builds developer-focused infrastructure and tools that simplify complex financial flows and tax workflows. He has moved between startup and scale environments, including leadership and hands-on roles at Stripe where he shipped developer products like Workbench and the Stripe CLI, and at Yelp where he modernized deployment, observability, and platform services. More recently he led the engineering effort behind Column Tax, which was acquired by Aiwyn, and now continues simplifying taxes at scale. Known for translating operational needs into safer, more automated pipelines, he blends technical depth with product-minded delivery. With a CS degree from Case Western Reserve, Fred brings a pragmatic mix of systems engineering, release engineering, and team leadership honed over cross-functional projects. An underappreciated strength is his pattern of stepping between management and individual-contributor roles to drive both strategy and implementation.
2 years of coding experience
11 years of employment as a software developer
Bachelor of Science Computer Science, Bachelor of Science Computer Science at Case Western Reserve University
English, German
Github Skills (25)
stripe10
stripe-payments10
command-line-tool10
cli10
sepa9
upi9
braintree9
native-library9
react-native-library9
adyen8
google-pay8
apple-pay8
payment8
payment-gateway8
checkout8
Programming languages (4)
Github contributions (5)
stripe/stripe-cli
May 2023 - Mar 2025
A command-line tool for Stripe
Contributions:14 reviews, 10 PRs, 18 pushes in 1 year 10 months
command-line-toolstripestripe-paymentscli
stripe/homebrew-stripe-cli
Dec 2024 - Feb 2025
Contributions:9 pushes in 2 months
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