Skype Calling UI & ReactXP

Context

After Microsoft acquired Talko, I worked on redesigning and re-architecting the Skype calling experience for audio and video communication across desktop and mobile.

Constraints

• Calling interfaces had to stay high-performance and real-time while handling live audio/video sessions.
• Feature parity across web, iOS, and Android required shared architecture without sacrificing platform quality.
• The migration had to improve accessibility and maintainability while supporting ongoing feature delivery.

Key Decisions & Contributions

• Our team built shared components with ReactXP (a Skype-built cross-platform framework for web, iOS, and Android) to unify calling UI behavior.
• We reinforced the migration with shared component libraries and build tooling so multiple clients could ship from one architecture.
• I balanced feature delivery with test coverage growth and onboarding to keep execution stable as the architecture evolved.

Outcomes

• The ReactXP migration onboarded the Skype client organization onto a single performant, accessible codebase.
• Calling UI features shipped across desktop and mobile on shared foundations.
• Unit-test coverage increased during active feature development.

Reflection

This work sharpened my approach to cross-platform engineering: shared code is valuable only when performance and native-feeling interaction remain intact. I continue to prioritize architecture choices that reduce fragmentation without flattening product quality.