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Field Notes
How we build digital products, told by the people who built them. Project stories, engineering notes and what we have learned industry by industry.4 notes · Latest September 24, 2026
Cover story · No. 004 · Playbook
The one-hour test: getting a codebase ready for AI agents
An agent is a brilliant new hire who forgets everything by tomorrow. What we build around it before it writes any code, and where it still falls short.
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- No. 003Industry notes4 min
Fintech design is mostly about removing doubt
Notes from a credit card issuer, four regional banks, a crypto platform, a payments app and an insurer. - No. 002Project story4 min
Lore: a study app for students who listen at 1.4x
Brand, product and launch in six months. What an audio-learning startup taught us about designing for people who study on the move. - No. 001Engineering4 min
Measure the bytes before you fix them
Four performance problems on our own website, and how each one looked different once we measured it.
About Field Notes
Aerolab has designed and built digital products for startups and global brands since 2012, from Buenos Aires and New York. Field Notes is where we write down what that work taught us. Each note is signed by the Aerolaber who proposed the topic and reviewed the final text.