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Varun Soni

@varunsoni2

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iOS Developer at Impact India Foundation who migrated WFNR from UIKit to SwiftUI and cut crashes by 12%.

India

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At Impact India Foundation, I independently led the WFNR app migration from iOS 12 and UIKit to iOS 15, SwiftUI, and MVVM. I also developed an offline-first iPhone and iPad experience with real-time session scheduling and Core Data sync.

I built an in-app SOS feature that alerts emergency contacts with users’ real-time location, and developed a doctor listing and consultation-booking module. For the AMC Mumbai app, I built the “Join Us Member” module in Objective-C and integrated Razorpay payments.

At RedDoorz, I contributed to three core products and reduced crash rates by 12% through Instruments-guided performance and memory optimization. At SparkBrains, I built Fretboard Buddy, a guitar-learning app with an interactive fretboard, REST API-powered lessons, and in-app purchases.

Experience

Work history, roles, and key accomplishments

Current

iOS Developer

Current

Impact India Foundation

Mar 2026 - Present (7 months)

Architected and led the migration of the WFNR app from iOS 12/UIKit to iOS 15/SwiftUI, and built an offline-first experience with real-time session scheduling and Core Data sync. Developed an SOS feature and a doctor listing module, and managed the full release cycle including TestFlight and production deployment.

Swift SwiftUI UIKit MVVM Combine Core Data Objective C Razorpay Swift Package Manager TestFlight Push Notifications Claude Code ChatGpt

iOS Developer

SparkBrains

Dec 2025 - Mar 2026 (3 months)

Built Fretboard Buddy, a guitar learning app, from scratch using Swift, SwiftUI, SwiftData, and AVFoundation, with MVVM architecture. Engineered a high-performance interactive fretboard engine and implemented REST API-powered lessons, In-App Purchases, and release management via App Store Connect.

Swift SwiftUI Swift Data AVFoundation MVVM REST APIs In App Purchases App Store Connect TestFlight Instruments

iOS Developer

RedDoorz

Feb 2024 - Oct 2025 (1 year 8 months)

Contributed to RedDoorz's core products including the hotel booking app, Reseller, and Grow, implementing Live Activities and push notifications. Reduced crash rate by 12% through performance profiling, and migrated the Offers page to SwiftUI. Also built an internal HRM app with unit testing.