KARTHIKEYAN PARAMASIVAM
Chennai
Summary
Innovative and result-driven Senior Software Engineer with 11 years of experience, primarily in native iOS development (9+ years). Proficient in Swift, SwiftUI, Combine, UIKit, Objective-C, REST API and GraphQL integration with hands-on exposure to Android, backend services, and CI/CD pipelines. Known for leading agile teams, building scalable mobile apps, and mentoring developers. Experienced in leveraging AI tools like GitHub Copilot (code validation, optimization), Cursor AI (testing and formatting), and Gemini AI (professional communication and documentation).
Overview
12
12
years of professional experience
Work History
Senior Software Engineer (Tech Lead)
Toast Inc
01.2021 - 08.2025
- Led a team of 4+ developers, delivering 30+ production features across iOS and Android.
- Architected & delivered core modules using Swift, SwiftUI, MVVM + Dependency Injection.
- Implemented CI/CD pipelines using Fastlane and Jenkins for build automation.
- Migrated & optimized document scanning (WeScan SDK), improving accuracy by 25%.
- Built secure integrations with GraphQL, Auth0, Firebase, AWS SNS for authentication & messaging.
- Maintained backend APIs in .NET & PostgreSQL, reducing error rate by 15%.
- Authored technical RFCs, increasing cross-team adoption of shared frameworks by 20%.
- Improved test coverage by 35% using Cursor AI and GitHub Copilot.
Senior Software Engineer
Maitri Technology Solutions
01.2017 - 01.2020
- Led a team of 3 engineers, managing agile sprints and delivering 30+ app features/releases.
- Migrated a legacy app from Objective-C to Swift, improving maintainability and reducing crashes by 30%.
- Integrated Firebase analytics, crash reporting, and RESTful services, cutting incident response time by 40%.
- Partnered with stakeholders to define requirements, ensuring 95% on-time delivery.
Software Engineer
SmaatApps Pvt Ltd
01.2016 - 01.2017
- Led a 2-member mobile team, delivering 2 client projects on iOS & Android.
- Integrated REST APIs using Alamofire (iOS) & Retrofit (Android), reducing API failure rate by 20%.
- Introduced Trello for sprint planning, improving delivery tracking efficiency.
- Initiated migration to Swift, enhancing performance in 2 legacy modules.
Software Engineer
Smackall Games Pvt Ltd
01.2014 - 01.2016
- Developed 3D animation engines & educational apps, reaching 20K+ downloads.
- Built offline-first apps with Storyboard, AVFoundation, Core Data.
- Key Projects:
- - Iyan 3D (iOS) – 3D animation app with rendering & video export.
- - Funclub Junior (iOS) – Educational app with Core Data & AVFoundation.
Skills
- IOS Development: Swift, SwiftUI, UIKit, Combine, AVFoundation, Core Data, GraphQL, Objective-C, REST APIs
- Architecture: Clean Code Practices, Modular Design, MVC, MVVM (with Dependency Injection), MVVMC (Coordinator)
- Testing: Unit Testing, XCTest framework, XCUITest (Basic to Intermediate)
- Tooling & DevOps: Fastlane, Firebase Crashlytics, GitHub Actions, Heapio, Jenkins, TestFlight, Xcode
- AI Tools: Cursor AI – for test generation, logic validation, formatting, Gemini AI – for professional write-ups, reports, and presentations, GitHub Copilot – for code assistance and performance optimization
- Leadership & Collaboration: cross-functional team coordination, mentoring, Sprint planning, stakeholder communication
- Android (Secondary): CameraX, Java, Kotlin, OpenCV, RoomDB
- Backend Development (Basic): NET (C#), PostgreSQL, REST API development, SQL
Timeline
Senior Software Engineer (Tech Lead)
Toast Inc
01.2021 - 08.2025
Senior Software Engineer
Maitri Technology Solutions
01.2017 - 01.2020
Software Engineer
SmaatApps Pvt Ltd
01.2016 - 01.2017
Software Engineer
Smackall Games Pvt Ltd
01.2014 - 01.2016