Shanmuganathan
Senior iOS Engineer with 9+ years building consumer and enterprise applications for Apple platforms and 15 years overall in software engineering. Specialized in Swift, SwiftUI, Network Extension, VPN, endpoint security/compliance, and high-performance client architecture. Proven ability to ship production features to millions of users, improve subscription conversion, and lead cross-functional initiatives end-to-end.
REVIEWS FROM CLIENTS
Product Link: https://support.perimeter81.com/docs/macos-agent-release-notes
- Delivered user-facing session security feature...
Product Link: https://support.perimeter81.com/docs/macos-agent-release-notes
- Delivered user-facing session security features including Idle Sign-Out that reduced unauthorized session persistence by 35% and improved enterprise compliance.
- Designed dynamic localization engine enabling runtime language switching; launched French support across mobile clients with zero regression.
- Implemented certificate-based Device Posture Checks integrated with authentication workflows, preventing non-compliant device access.
- Improved VPN reliability by optimizing FQDN-based routing, DNS resolution, and split tunneling edge cases.
- Contributed to Swift and Objective-C codebases involving Network Extension, Cocoa frameworks, secure IPC (XPC) and background daemons.
AppStore: https://apps.apple.com/us/app/omnissa-horizon-client/id6737089391
- Delivered multi-monitor screen capture for mac...
AppStore: https://apps.apple.com/us/app/omnissa-horizon-client/id6737089391
- Delivered multi-monitor screen capture for macOS remote desktops, enabling artifact-free capture of session content.
- Optimized remote display rendering and inter-process messaging, reducing latency and improving responsiveness.
- Enhanced USB device redirection reliability by improving device enumeration and transfer handling using IOKit.
- Contributed to production features in C/C++/Objective-C codebases, maintaining clean abstractions and reusable components.
Appstore: https://apps.apple.com/in/app/expressvpn-fast-secure-vpn/id886492891
- Implemented A/B testing for subscription pl...
Appstore: https://apps.apple.com/in/app/expressvpn-fast-secure-vpn/id886492891
- Implemented A/B testing for subscription plan flows using LaunchDarkly and Firebase analytics; selected variant increased top-tier plan adoption by 2% and added ~$1.4M in long-term value.
- Rebuilt 20+ UI screens as part of a platform-wide rebrand using a reusable UIKit/SwiftUI component library, improving accessibility, UI consistency, and reducing development effort in subsequent releases.
- Reduced VPN reconnection failures by optimizing Network Extension tunnel lifecycle and retry logic, improving session reliability for end users.
- Built shared Swift modules reused across iOS and tvOS clients to unify authentication, analytics tracking, and business logic.
- Instrumented subscription funnels with Firebase dashboards to monitor variant adoption and revenue impact, enabling data-driven product and pricing decisions.
- Delivered features to millions of users using staged rollouts and feature flag gating to minimize risk and ensure stability during release cycles.