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Sai Charan

@saicharan5

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I build scalable, polished iOS apps for fintech, fitness, e-commerce, and connected-device experiences.

India

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I've built and modernized iOS products at Grid Dynamics for Experian, FitBudd, Trell, RedBus, and Philips Innovation Campus. For Experian, I architected a Server-Driven UI platform with SwiftUI, GraphQL, and modern concurrency, enabling reusable server-controlled experiences and faster feature delivery.

I improve mobile quality and performance through automation, clean architecture, and reusable components. I've raised test coverage to 90%, reduced memory footprint by approximately 10–20%, mentored an intern, and delivered watchOS, Bluetooth, offline chat, video, publishing, booking, and connected-device features.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Grid Dynamics

Nov 2024 - May 2026 (1 year 6 months)

Architected a scalable Server-Driven UI platform using SwiftUI, GraphQL, and Modern Concurrency, enabling server-controlled UI rendering and faster feature delivery. Built a comprehensive test automation suite and drove performance engineering to reduce memory footprint by 10-20%.

SwiftUI GraphQL Async Await Actors Cucumber Mock Servers Quick Nimble Instruments Clean Architecture SOLID Code Review Mentorship Agile

Senior Software Developer

FitBudd

Sep 2022 - Aug 2023 (11 months)

Designed and developed a WatchOS companion app with synchronized workouts via WatchConnectivity, and architected a CoreData-backed chat store synchronized with FirebaseFirestore for offline access and reliable data retention.

SwiftUI WatchConnectivity Firestore Core Data High Intensity Interval Training LISS Strength Training

Software Development Engineer 2

Trell

Jun 2021 - Aug 2022 (1 year 2 months)

Led the modernization of Trell's mobile experience by redesigning critical user journeys, refactoring legacy code, and delivering video editing, content publishing, rewards, onboarding, authentication, and streaming features.

iOS Mobile Development Refactoring Video Editing Content Publishing Rewards Onboarding Authentication Streaming

Software Engineer

Redbus

Feb 2020 - Dec 2020 (10 months)

Developed UI programmatically using Swift, enhancing features like ticket cancellation flow, seat bookings, home screen rescheduling, and offers to improve user experience.

Swift UIKit Programmatic UI Cancellations Seat Rescheduling Offers

Software Development Engineer II

Philips Innovation Campus

Jul 2017 - Feb 2020 (2 years 7 months)

Implemented iBeacon, Bluetooth, and deeplinks features using CoreLocation and CoreBluetooth frameworks. Developed Python-based automation solutions for localization and asset management, and created user registration websites and email templates using HTML & CSS.

IBeacons Bluetooth CoreLocation CoreBluetooth Python HTML CSS Localization Asset Management Automation

Intern

Philips Innovation Campus

Jan 2017 - Jun 2017 (5 months)

Developed cross-platform POCs integrating React Native features into native iOS/Android apps and built Xamarin (C#) prototypes, demonstrating adaptability across mobile ecosystems.

React Native Xamarin C#iOS Android POC