John Zeller
Staff Software Engineer at Ampla
Portland, Oregon, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Zeller is a staff software engineer and technical leader in Portland, Oregon with 13 years of experience building and scaling banking and payments platforms from prototype to multi-million dollar ARR. He’s shipped high-impact products at Ampla—architecting the first banking platform and multiple card products that grew to $100M+ and $10M+ transaction volumes—and led teams through rapid hiring and scaling. Hands-on across backend systems, integrations (Plaid, QuickBooks, Freshdesk), and Python-based tooling, he also contributed features to prominent open-source projects like the coinbase-python API. A founder and former CTO who scaled a startup through TechStars, John combines product-minded engineering with operational rigor and a knack for automating manual workflows to accelerate onboarding and reliability. He’s actively seeking opportunities to apply his engineering and leadership skills to companies focused on community and planetary impact.
13 years of coding experience
12 years of employment as a software developer
Bachelor of Science (B.S.) Computer Science, Bachelor of Science (B.S.) Computer Science at Oregon State UniversityAssociate of Science (A.S.) Business, Associate of Science (A.S.) Business at Portland Community College
English
Stackoverflow
575reputation
78kreached
1answer
11questions
Github Skills (13)
unit-testing10
api10
python10
apidoc10
rest-api9
test-automation8
android-studio6
flask-login6
debian6
django6
wxpython6
flask6
ubuntu6
Programming languages (7)
Github contributions (5)
coinbase/coinbase-python
Jun 2017 - Jan 2019
Coinbase Python API
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 5 PRs, 6 comments in 1 year 6 months
Contributions summary:John primarily focused on enhancing the codebase by implementing new features related to reports within the Coinbase Python API. Their contributions included adding methods for interacting with the reports endpoint, integrating new models, and updating existing client code. The changes involved modifying multiple files, particularly in the `coinbase/wallet` directory, and adding relevant tests to ensure the correct functionality of the newly added reports features. Additionally, the user improved code readability by correcting indentation.
apipythoncoinbasecoingeckogdax-api
JohnLZeller/Classes
Nov 2012 - Jan 2014
Contributions:52 commits in 1 year 2 months
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