Zac Williams
Senior Software Engineer at Fleetio
Birmingham, Alabama, United States
Summary
👤
Senior🎓
Top SchoolZac Williams is a Senior Software Engineer with 17 years of experience specializing in Ruby on Rails, currently shaping backend architecture at Fleetio from Birmingham, Alabama. He brings a history of senior and principal engineering roles across education and enterprise-focused companies, plus entrepreneurial experience as CTO of startups and co-owner of a local restaurant. Zac contributes to notable open-source projects like Active Merchant—where he implemented and tested payment gateway operations—demonstrating practical expertise in payment integrations and test automation. He blends hands-on coding, QA automation, and architectural leadership, often stepping into operational and product-facing responsibilities. Zac holds a BS in Computer Science and an MS in Computer & Information Sciences, reflecting a solid academic foundation that complements his pragmatic, delivery-focused approach.
18 years of coding experience
16 years of employment as a software developer
Hueytown High SchoolMS, Computer & Information Sciences, MS, Computer & Information Sciences at University of Alabama at BirminghamBS, Computer Science, BS, Computer Science at The University of Alabama
Github Skills (5)
testing10
unit-testing10
activemerchant10
payment-gateway10
ruby10
Programming languages (3)
Github contributions (5)
activemerchant/active_merchant
Sep 2008 - Oct 2008
Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
Role in this project:
Back-end Developer & QA Engineer/Test Automation Engineer
Back-end Developer & QA Engineer/Test Automation EngineerContributions:7 commits in 6 days
Contributions summary:Zac primarily contributed to the `MerchantESolutionsGateway` implementation within the `active_merchant` library. Their work included adding a `credit()` operation, implementing a `void()` operation, and writing unit and remote tests for the `MerchantESolutionsGateway`. The tests cover various payment scenarios, including successful and unsuccessful purchases, authorizations, captures, voids, and AVS/CVV checks. They also fixed a bug in the `capture()` method.
activemerchantrubyshopify
jzw/dotfiles
Feb 2016 - Apr 2024
Contributions:14 pushes, 2 branches in 8 years 3 months
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