Shashwat Singh

iOS Developer & Security Enthusiast

Building secure, high-performance mobile experiences

Professional Journey

Swift Developer Intern (macOS)

FocusModeFeb 2025 - Present

Productivity tool development with real-time content restriction systems

Technical Highlights:

  • NSWorkspace observers for application state tracking (NSRunningApplications)
  • Network Extensions framework for packet-level filtering (NEFilterPacketProvider)
  • CoreData multi-context architecture with parent-child relationships
  • AppKit integration for macOS menu bar utilities

Achievements:

  • Reduced blocking system latency to <200ms through NSWorkspace optimization
  • Implemented CI/CD pipeline reducing deployment overhead by 2.5hrs/week
  • 50+ workspaces created in first month post-launch
Swift/AppKitCoreDataNetwork ExtensionsGitHub Actions CI/CD

Associate SDE Intern

Saptang Labs Pvt. Ltd.Feb 2024 - July 2024

Mobile security engineering for financial sector applications

Technical Highlights:

  • RASP implementation: Jailbreak detection via filesystem checks (/Applications/Cydia)
  • VPN detection through Network framework's NWPath monitoring
  • Device fingerprinting using IDFA/IDFV with keychain anchoring
  • Real-time system integrity checks (debugger detection, binary checksums)

Achievements:

  • Integrated 15+ security checks with <5ms overhead per scan
  • Prevented 1200+ tampering attempts in production environment
  • Reduced false positives by 40% through heuristic analysis
Swift/SecurityLLVM ObfuscatorPostmanCharles Proxy

iOS Developer Intern

Flixdin Pvt. Ltd.Sep 2023 - Dec 2023

Social networking app development with real-time features

Technical Highlights:

  • SwiftUI declarative UI with ViewModifier abstractions
  • Firebase Auth integration with Google Sign-In (OAuth 2.0)
  • Async/Await migration from completion handlers
  • Coordinated with 10+ member cross-functional team

Achievements:

  • Reduced API response time by 300ms through payload optimization
  • Achieved 98% crash-free sessions in production
  • Onboarded 500+ beta users during testing phase
SwiftUIFirebaseMVVMXcode Instruments

Featured Projects

Appetizers - Food Ordering App

iOS culinary experience with real-time order management

SwiftUICombineAsync/AwaitNSCache
View on GitHub →

Video Hosting/Sharing Platform Backend

Scalable media infrastructure with secure access controls

Node.jsMongoDBCloudinaryJWT
View on GitHub →

HostelBuddy iOS App

Campus management solution with AR integration

SwiftUIARKitFirebaseWebSockets
View on GitHub →

Barcode Scanner

High-performance scanning utility with low-latency processing

AVFoundationCore ImageGCD
View on GitHub →