Timmy Lewrenz

Architected modular iOS frameworks, decomposing a 7,000-file monolith into 12 reusable modules and improving build parallelism by 62%. Eliminated 90% of prior data races with async/await and actors, reduced crash rate by 33%, and cut deploy time from 4 hours to 22 minutes while lifting engagement by 7% via A/B testing.

Designed high-performance Swift/SwiftUI and Objective-C features, owning API contracts used by 2M+ weekly active users. Modularized SDK components with Swift Package Manager, improving team reuse and lowering release conflicts by 57%, and reduced CI-to-release velocity by 41% through Xcode Cloud and Fastlane.

Built mobile-friendly SDK APIs in Objective-C/Swift and modernized CI workflows in Azure DevOps, cutting CI time by 67%. Implemented telemetry ingestion and sampling into Azure analytics and data warehouses, improving funnel analysis latency by 52%, and enforced SLOs/runbooks that reduced P1 MTTA by 46%.

Delivered secure, mission-critical mobile apps with encrypted local storage and offline-first sync for 99.7% reliable sensor-data transfers to on-prem SQL. Reduced CPU spikes by 48% via low-level tuning and debugging, and improved integration times by 58% using Jenkins-based CI/CD and automated provisioning.

Developed enterprise mobile integrations using ServiceNow APIs to improve field ticket resolution by 17% and sync CMDB asset metadata with mobile clients and PostgreSQL-backed services, increasing data freshness by 61%. Automated deployment/testing with Jenkins pipelines and device farms to reduce manual validation by 69% and cut crash-prone releases by 33% through performance dashboards.

Earned a Bachelor of Science in Computer Science at the University of Florida from 2007 to 2011.