Sonia enhanced user experience across Expensify’s suite by updating and aligning language settings documentation in the Expensify/App and callstack-internal/Expensify-App repositories, clarifying multilingual support and streamlining self-service instructions. She applied disciplined technical writing and Markdown skills to ensure consistency and accuracy, reducing support friction for global users. In margelo/expensify-app-fork, Sonia developed a Concierge AI feature that proactively assists users facing financial connection issues, such as problems with company cards or bank integrations. Her work combined AI integration with clear documentation updates, demonstrating depth in both feature delivery and technical communication, and improving readiness for user support interactions.