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Zach O'Donnell

Writing

Notes from the work

Four pieces tied to case studies, then a shorter set of earlier notes.

· 2 min read

What Managing $5M+ in Amazon Ad Spend Taught Me

Supporting more than $5 million in annual Amazon advertising spend only works when efficiency, net sales, and the work required to optimize are part of the same decision.

· 2 min read

Building League Island

What started as a bracket tracker became a league-management product: roadmap, subscriptions, support, and the workflows organizers actually finish.

Additional writing

  • How I Approach API Integrations as a Business Analyst

    · 4 min read

    API integrations are not just technical projects. They are business workflow projects that require understanding the data, the process, the edge cases, and the decision the integration is supposed to support.

  • Turning Messy Ecommerce Data Into Useful Dashboards

    · 3 min read

    Ecommerce data usually starts messy. The value comes from cleaning, standardizing, and turning it into dashboards that help people understand performance and make better decisions.

  • The Difference Between Reports and Decision Tools

    · 3 min read

    Reports show what happened. Decision tools help people choose what to do next. That difference is what separates passive dashboards from useful business systems.