Kumar Shubham
Senior iOS Engineer with 6 years building consumer-scale Swift applications. Works at the platform layer of a 20+ module Swift Package codebase at Allen Digital — authoring shared frameworks, owning multi-release platform migrations, and writing the design docs other feature teams build against.
Previously shipped payments, seat selection, and booking flows at redBus (India’s largest bus-ticketing platform, tens of millions of users, 4.7★ App Store rating). Author of MDLatex, an open-source Swift Markdown + LaTeX rendering package.
Bengaluru, India · Open to relocation (Europe / US).
Experience
SDE II (Senior iOS). Platform frameworks & SDUI.
RedPay payments & UIKit → SwiftUI migration.
Interactive seat selection & transaction retries.
Projects & OSS
Swift Markdown + LaTeX renderer on Swift Package Index.
Recursion-free JSON scanner eliminating stack overflows.
ActivityKit framework with zero-CPU lock-screen timers.
Recognition
Allen Digital 24h: on-device Core ML AI assistant.
redBus FY22 Q1 recognition (top 1% of engineers).
Grenze Scientific Society: AI video monitoring.
Experience
Bengaluru, India · 20+ module Swift Package codebase with KMP
• Shipped SafeDecoder, an iterative JSON scanner eliminating stack-overflow crashes in server-driven UI up to 50,000 nesting levels.
• Designed a zero-CPU Live Activity framework (ActivityKit + WidgetKit) and led the app-wide iOS 17 platform migration.
• Built the subjective test platform, URLSession background download manager, and created the open-source MDLatex rendering engine.
Bengaluru, India · Tens of millions of users · 4.7★ App Store rating
• Led incremental UIKit → SwiftUI migration of core booking surfaces with MVVM and shared design system components.
• Integrated RedPay payment stack with transaction retry/fallback handling, and rebuilt Combine networking with response caching.
Bengaluru, India
• Rebuilt the primary seat-selection funnel with interactive gesture-driven animations to lift booking conversion.
• Developed transaction recovery workflows, Core Data persistence models, and on-device Core ML features.
Technical Skills
Languages: Swift, Objective-C, Kotlin (KMP interop), Python.
UI: SwiftUI, UIKit, WidgetKit, ActivityKit, Core Animation, design systems & reusable component libraries.
Concurrency & Data Flow: Swift Concurrency (async/await, actors, Sendable), Combine, GCD, structured cancellation.
Architecture: MVVM, Clean Architecture, multi-module SPM, server-driven UI, offline-first, protocol-oriented design.
Apple Platform: URLSession (background sessions), Core Data, AVFoundation, WebSockets, Server-Sent Events, Push & Local Notifications, Core ML.
Quality & Delivery: XCTest, TDD, Instruments profiling, Fastlane, GitHub Actions, SwiftLint, Firebase (Remote Config, Crashlytics, Analytics), staged rollouts & kill switches.
Backend-Adjacent: REST API & schema design, AWS S3 (pre-signed URLs, resumable upload), Moya, gRPC-adjacent SSE pipelines.
Education & Recognition
Education: B.E. Computer Science and Engineering — Siddaganga Institute of Technology, Karnataka, India (2016 – 2020).
Open Source: MDLatex — Swift package for rendering Markdown with embedded LaTeX. MIT licensed, published on Swift Package Index.
Honors: 1st place, Allen Digital 24-hour Hackathon 2024 (AI widget assistant using on-device Core ML) · Trailblazer Award, redBus FY22 Q1 (top 1% of engineers) · 5th of 49 teams, redBus Makeathon 2023 · Technical Excellence Award, SIT Browse 2017.
Publication: “AI-Based Video Monitoring System: Automated Surveillance for Enhanced Security,” Grenze Scientific Society Journal, July 2020.
Connect
Reach me on LinkedIn, GitHub, by phone at +91 75459 62949, or via email at the.official.kumar.shubham@gmail.com.