Summary
Overview
Work History
Education
Skills
Timeline
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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, TX
08.2015

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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Siva Sankar Devabathini