Jaro developed robust cross-platform build and CI infrastructure for the SageTeamY and SageTeamX repositories, focusing on automating native module support and streamlining developer onboarding. He migrated SageTeamY to TypeScript, integrated node-pre-gyp for reliable native dependency builds, and standardized environment setup scripts across Windows, macOS, and Linux using Bash and PowerShell. In SageTeamX, he implemented platform-specific installers and updated build configurations to ensure consistent native module builds. By aligning CI workflows and provisioning system dependencies, Jaro reduced build failures and onboarding time, demonstrating depth in Node.js development, CI/CD automation, and cross-platform scripting while establishing a scalable foundation for future work.