Siva Sankar Devabathini
Phoenixville,PA
Summary
Senior iOS Engineer with 9+ years of experience delivering high-quality mobile apps at Comcast. Improved app startup time by 15%, increased unit test coverage from 30% to 80%, and boosted activation success rate from 65% to 80%. Led migrations to GraphQL and Swift Package Manager, optimized performance using async/await, and mentored teams across 10+ features. Strong in Swift, SwiftUI, MVVM, Combine, Bluetooth integration and feature testing with XCUITest framework.
Overview
9
9
years of professional experience
Work History
Senior IOS Engineer
Comcast - Xfinity
03.2020 - Current
- Implemented startup requests with GraphQL, cutting network call times by 20% and boosting data fetching efficiency.
- Increased visibility of authentication errors, reduced daily user logouts by 20,000, helps user retention and app stability.
- Optimized app startup time from 4.5s to 3.8s with parallel network requests and data lazy loading on start up flow.
- Improved Unit testing and UI testing strategy for more than 10+ feature teams contributing to Xfinity app.
- Lead Swift Package Manager (SPM) migration effort from Cocoa pods and migrated over 10+ internal libraries and provide guidance to team
IOS Engineer
Comcast - xFi
03.2018 - 02.2020
- Implemented MVVM architecture, increasing unit test coverage from 30% to 80% for code reliability.
- Built a Core Bluetooth library to simplify hardware integration for gateways, increasing the success rate from 65% to 80%.
- Re-architect Gateway activation flow to increase mobile device activations success rate from 65% to over 80%
- Migrated WKWebview to native overview, improving dynamic content card user experience for 5 panels on overview page
- Added localization support for 4 languages, extending to 5 partner apps.
IOS Developer
Comcast - Tech 360
02.2016 - 03.2018
- Developed core modules for Tech360 MVP release, enhancing GPS tracking for field technicians and released to over 10,000 field technicians.
- Fetch network requests with GCD and Operation Queues, leading to a 25% faster response time and a smoother experience for technicians while using app.
Education
Master of Science - Computer Engineering
University of Houston-Clear Lake
Houston, TX08.2015
Bachelor's Degree - Electronics and Communications Engineering
QIS Institute of Technology
India 04.2012
Skills
- IOS Development
- Swift
- SwiftUI
- MVVM
- SPM
- GCD (Grand Central Dispatch)
- GraphQL
- REST
- Memory Management
- Core Data
- Async/await
- Core Bluetooth
- Unit Testing
- UITesting
- Cross-platform Development
Timeline
Senior IOS Engineer
Comcast - Xfinity
03.2020 - Current
IOS Engineer
Comcast - xFi
03.2018 - 02.2020
IOS Developer
Comcast - Tech 360
02.2016 - 03.2018
Master of Science - Computer Engineering
University of Houston-Clear Lake
Bachelor's Degree - Electronics and Communications Engineering
QIS Institute of Technology
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