Jeff Lett Email and Phone Number

Lead a team called "Reality Labs - Reliability & Health" to monitor reliability metrics of AR and VR operating system releases to enable data-driven release decision-making.

Lead iOS Engineer of the Performance and Efficiency pillars for a WhatsApp team focused on Performance, Reliability, & Efficiency.- Established App Size Budgeting framework for WhatsApp iOS - defined yearly IPA growth budget and monitored team-specific contributions that kept app size growth below 10% YoY.- Integrated custom performance logging mechanism into WhatsApp iOS - improved data precision, heightened monitoring capabilities, and streamlined alerting functionalities. Effectively onboarded seven product teams within three months to prevent feature performance regressions.- Designed and implemented data import system that leverages App Store Connect API to assess overall health of WhatsApp across various versions which resulted in early detection of several performance regressions before their release to users.

Led conceptualization, design, and implementation of "creator" broadcasting workflows for cutting-edge Amazon Music media application, Amp.- Established guidelines for native swift development and architected layered Model-View-Intent (MVI) design to promote efficiency, scalability, testability, and maintainability.- Championed transition to GraphQL to deliver improved user experience that enabled additional features built off real-time subscriptions.

Led 2 teams of iOS developers that maintained and improved Pandora app with user base of over 40 million active users.- Managed key projects such as developing an Apple Watch app, beating Spotify to market with Apple Watch offline playback capabilities, and integration of Siri control features that were ready on day 0 of iOS 13 release.- Initiated implementation of GraphQL and OAuth technologies within Pandora for iOS and watchOS that resulted in reduction of up to 10x network requests.

Managed 2 teams of iOS and Android engineers to deliver timely updates to flagship CNN news and video apps.

Led iOS engineering team to rewrite flagship CNN news and video app in Swift

Managed two teams of onshore and offshore developers to deliver new features and functionality to the IHG flagship hotel reservation apps.

Managed a team of native iOS engineers responsible for building the flagship hotel reservations app for Intercontinental Hotels Group.

Lead a team of mobile developers in the development and maintenance of native iOS and cross-platform mobile applications for veterinary sales reps, resulting in increased efficiency and sales.

Worked on a small team of native mobile developers to maintain and improve the flagship Android and iOS hotel reservations apps, resulting in $360m in revenue in 2012.

Successfully lead a small team of developers to develop high-quality Android and iOS mobile applications.