Zach Risher
Chief Technology Officer at Zanobo Partners
Santa Monica, California, United States
Summary
👤
Senior🎓
Top SchoolZach Risher is a seasoned technology leader and Chief Technology Officer based in Santa Monica with 11 years of experience designing and implementing product, process, and infrastructure solutions for startups and small companies. As founder of Zanobo Partners and CTO of Qualify Digital Labs, he has built and advised on over 10 products end-to-end, managed engineering teams, and coordinated cloud-first stacks with deep AWS expertise. He combines hands-on coding across C#, Python, Ruby, and JavaScript with systems architecture that has supported high-traffic sites and complex deployments. Zach’s hands-on past as RideApart’s co-founder and sole systems admin demonstrates his ability to scale products to hundreds of thousands of monthly users while owning CI/CD, caching, and security. He contributes to open-source projects such as the PSLmodels Tax-Calculator, applying back-end testing and tax-form logic to rigorous microsimulation code. A Pomona College applied mathematics graduate, he brings quantitative rigor to product strategy and technical recruiting for growth-stage teams.
11 years of coding experience
4 years of employment as a software developer
BA, Applied Mathematics, BA, Applied Mathematics at Pomona College
English, French
Github Skills (7)
calculator10
tax10
calculation10
ax10
pytest10
python10
calc10
Programming languages (12)
Github contributions (5)
PSLmodels/Tax-Calculator
May 2015 - Feb 2017
USA Federal Individual Income and Payroll Tax Microsimulation Model
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 commits, 16 PRs, 134 comments in 1 year 9 months
Contributions summary:Zach contributed to the development and testing of the `tax-calculator` model, which is a microsimulation model for US federal taxes. The user's commits included changes to column labels in the `utils.py` file, and the addition of `TaxForm` and child classes within the `taxcalc` directory, which would likely involve integrating tax form logic. They also added and modified files related to testing the tax calculation logic, using pytest.
individualpayrollpythonlawpsl-cataloged
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