Zac Rosenbauer
New York, New York, United States
Summary
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RockstarZac Rosenbauer is a hands-on CTO and co-founder with 11 years of experience building AI-first developer tooling and scaling cloud platforms at startups and enterprise acquisitions. He blends deep operational leadership—having grown platform teams from single digits to 100+ across multiple regions and managed $50M+ multi-cloud budgets—with product-level engineering, shipping core pieces like CLIs, embeddings pipelines, and agent runtimes for Claude Code, Cursor, and Copilot. Zac led Platform, SRE, and security through SOC-2/PCI certifications and M&A due diligence at Precognitive and ShopRunner, later running Platform Operations for FedEx Dataworks at scale. An active open-source contributor, he improved security-focused TypeScript typings and tests for the widely used mongoose project and is a core contributor to VoltAgent’s workflow runtime. Based in New York, he pairs entrepreneurial grit from founding ventures as a student-athlete with a knack for translating complex infra and AI agent problems into production-grade developer experiences.
11 years of coding experience
Stackoverflow
195reputation
38kreached
7answers
1question
Github Skills (18)
typesc10
typescript10
mongodb-database10
type-system10
typescript-types10
nodejs10
typescripts10
mongodb10
odm9
testing8
html6
glyph-icons6
css6
react-props6
twitter-bootstrap6
Programming languages (14)
Github contributions (5)
Automattic/mongoose
Sep 2022 - Sep 2022
MongoDB object modeling designed to work in an asynchronous environment.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 1 PR, 1 comment in 1 day
Contributions summary:Zac primarily focused on enhancing the type definitions within the project. They added a `sanitizeFilter` function to the TypeScript definitions, a crucial step for security. Furthermore, the user corrected minor typos and removed unnecessary spaces in the codebase. Additionally, a test file for the `sanitizeFilter` function was added, improving code quality and maintainability.
asynchronousmongodbmongonodejsodm
thebytefarm/ciderpress
Mar 2026 - Jul 2026
Contributions:35 reviews, 26 PRs, 244 pushes in 4 months
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