Salvatore Testa is an engineering manager in San Francisco with 13 years of experience building developer-facing platforms, mobile SDKs, and integration tooling. At Persona he has led teams across developer experience, inquiries, and platform integration—shipping API documentation workflows, OpenAPI specs, webhook and API key management, and third-party data integrations. Previously at Square he delivered merchant pricing ML services, data deduping tools, and core mobile payments SDKs, blending backend systems thinking with client SDK design. He pairs hands-on coding (notably contributions to an open-source Kotlin/Swift workflow/state-machine library) with team leadership, often tackling dependency and build-system challenges that keep projects healthy. Known as a “reader of code,” he focuses on making integrations reliable and developer-friendly while keeping an eye on UX details in state-driven UIs.
13 years of coding experience
10 years of employment as a software developer
Bachelor of Science (B.S.) Computer Science, Bachelor of Science (B.S.) Computer Science at Rice University
A Swift and Kotlin library for making composable state machines, and UIs driven by those state machines.
Role in this project:
Full-stack Developer
Contributions:7 reviews, 7 commits, 8 PRs in 1 year
Contributions summary:Salvatore contributed to the project by updating dependencies, including Kotlin and related libraries, and by reverting a previous Kotlin upgrade. They also modified build files (build.gradle.kts, buildSrc/src/main/java/Dependencies.kt), demonstrating involvement in project setup and dependency management. Furthermore, the user fixed a typo in a UI example related to saving state, indicating a focus on UI and potentially state management aspects of the project. They also updated the compose UI and fixed deprecated warnings related to colors.
Contributions:20 releases, 20 pushes, 1 branch in 2 years 1 month
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