Prit
Yagnik
6 years building iOS apps that make money — subscription engines, dynamic paywall A/B testing, and funnel analytics. Based in Ahmedabad, available worldwide.
What I actually do.
Senior iOS Engineer at @greydesk since Feb 2020. Architected and shipped 20+ App Store apps in Swift 5+, SwiftUI, and UIKit — pixel- perfect, accessible UIs across every screen size and Dynamic Type setting.
MVVM, Clean Architecture, SOLID. Swift Concurrency (async/await, actors), Combine, Core Data with batch fetching and background contexts (30% faster reads). XCTest, SonarQube, CI/CD with TestFlight & App Store Connect — production stuff, not tutorial stuff.
Multi-tier subscription engines integrating StoreKit, RevenueCat, and Adapty — with transaction validation and churn tracking. Remote-controlled dynamic paywalls via Superwall for instant A/B tests without an App Store review cycle.
Funnel analytics with Mixpanel and Firebase, backed by internal Python/FastAPI modules monitoring webhooks and flagging high-churn localized bugs.
Most iOS engineers ship apps. I ship apps that make money — subscription engines, dynamic paywall A/B testing, and funnel analytics so marketing teams can iterate without waiting on App Store review.
Key projects.
Featured apps from a 20+ release portfolio shipped at @greydesk — click any card to see the live App Store listing.
Drawing Desk
- ›Architected an AI sketch colorization feature using native Core Graphics pipelines — transforms B&W sketches into finished digital artwork without third-party ML libraries.
- ›Engineered a Pro Drawing engine with freehand tools, layering system, and high-resolution canvas using Core Graphics, Core Animation, and UIBezierPath — sub-frame stroke latency.
- ›Integrated Apple Pencil protocols with pressure tracking, tilt detection, and precise hit-testing — advanced layer workflows comparable to Sketchbook-style apps.
- ›Built a Learn to Draw module with step-by-step guided tracing and real-time visual feedback across progressive difficulty levels.
Self Employed — Tax & Expenses
- ›Built core modules — Core Data architecture, JWT-authenticated REST API, Core Location mileage tracking, Firebase Analytics, StoreKit IAP, and income/expense dashboards with CSV export.
- ›Designed a background mileage-tracking algorithm using Core Location to catalog automotive distance logs for personal and business financial audits.
- ›Engineered a taxation module computing US-standard income tax with profile-based deductions; secured sensitive financial data via Keychain cryptographic storage.
- ›Built data visualization dashboards (pie charts, expense trends, monthly/yearly graphs) with seamless CSV/Excel export pipelines.
Daily Workout
- ›Built fitness tracking flows for exercise routines, rest timers, and progress analytics — backed by HealthKit integration for workout and activity sync.
- ›Implemented Core Data persistence for offline-first workout history, personal records, and routine templates across device tiers.
- ›Instrumented Mixpanel funnels for onboarding, workout completion, and retention — surfacing drop-off points back to the marketing team.
- ›Contributed to subscription paywalls and routine library UI alongside the Greydesk team.
The stack.
Languages
UI & Apple Frameworks
Architecture
Concurrency
Monetization
Analytics
ML
Security & Networking
Testing & Quality
Data & Storage
Backend
CI/CD & Tools
What I think about.
All articles on Medium →I write about AI economics, tech industry dynamics, and what's actually happening under the hype.
The AI Pricing Illusion: Why AI Tools Are So Cheap
Uber burned through their entire 2026 AI budget by April — at subsidized prices. The gap between what you pay and what it costs to serve you is funded by VC. That gap is closing.
Inside the Self-Funding AI Hype Machine
Meta, Amazon, Microsoft and Alphabet committed $725B in capex for AI in 2026. But the same entities are the investors, the buyers, and the distributors. Nobody's asking what it actually proves.
Is US Artificial Intelligence a Tech Bubble?
AI the technology is real. US AI the investment thesis — a handful of American companies controlling a durable moat — is a shakier proposition being attacked from three directions simultaneously.
Why Companies Blame AI for Layoffs
AI redundancy washing: companies reframing pandemic over-hiring corrections as strategic AI transformation. Even Sam Altman said the quiet part out loud.
Why AI Won't Kill Your Job (But Might Kill Your Career)
What happened to bookkeepers when accounting software arrived — and why the exact same pattern is playing out in software engineering right now. Three groups. One of them wins.
The Elephant Doesn't Leave the Room
AI won't kill legacy IT companies like TCS and Infosys. But the body-shop model is over. The ones that pivot from labor arbitrage to outcome ownership will still be here in 2035.
Credentials.
Education
Certifications
- ✓SOLID Programming PrinciplesLinkedIn Learning · 2024
- ✓iOS 17 Development Essential TrainingLinkedIn Learning · 2024
- ✓Xcode 15 Essential TrainingLinkedIn Learning · 2024
What clients say.
"Prit solved the issue! We had a challenge of fixing an iOS app and it worked great!"
Let's build something.
// Need a new iOS app? A paywall A/B test wired up? A subscription engine that actually validates? A funnel instrumented? A bug crushed? I respond within 24 hours, every time.