Roozbeh Zarei

Designed and shipped a robust parental control system from the ground up, implementing low-latency tracking for location, battery, and communications across child devices.

Expanded market reach by 36% by re-engineering a legacy Android application to support a wider ecosystem of OS versions while maintaining strict feature parity.

Engineered a multilingual, cross-platform application for a premier UAE online clinic, simplifying the patient journey from doctor discovery to lab test booking.

Maintained a 5-star rating across five Kotlin projects, cited by international clients for exceptional code quality, communication, and strict adherence to delivery milestones.

Delivered a high-traffic soccer ticketing app capable of sustaining 20K concurrent users during peak events; utilizing Firebase analytics and monitoring to maintain system stability and rapid error resolution.

Accelerated stadium entry by building an internal Android POS application for stadium staff to validate and print tickets, significantly improving gate processing efficiency and reducing manual errors.