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Available for work

iOS Developer
building delightful,
high-performance apps.

7+ years crafting iOS apps with Swift & SwiftUI. Indie products and client work, focused on clean UX and rock-solid performance.

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Ramkumar Vellaisamy - iOS Developer portrait

Featured Apps

Apps I designed, built, and shipped to the App Store

Smart Receipts icon Smart Receipts Tally Counter icon Tally Counter Places Been icon Places Been Ring Sizer icon Ring Sizer Habit Breaker icon Habit Breaker

About Me

I'm Ramkumar Vellaisamy, an iOS developer with 7+ years of experience building clean, high-performance apps using Swift & SwiftUI. I ship indie apps on the App Store alongside client projects — focused on polished UX, offline-first architecture, and reliable performance. Currently based in Japan.

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Experience

7+ years in iOS (Swift, SwiftUI, UIKit)

school

Education

B.E./B.Tech in Information Technology

public

From

Tamil Nadu, India

location_on

Currently

Japan · Learning Japanese (N3)

Experience

Indie iOS Developer

Aug 2024 – Present

Self-employed

Designed, developed, and launched multiple iOS apps with Swift/SwiftUI — widgets, biometric auth, in-app events. Published & maintained on the App Store; featured on Product Hunt with top rankings.

iOS Developer (Contract)

Dec 2024 – May 2025

SmartCash PSB — Airtel Africa

Enhanced the SmartCash Retail app: fixed critical bugs, refactored legacy code, and improved performance and UX. Collaborated with product/design to ship new UI flows and streamline rollout with code-quality best practices.

iOS Developer

Jun 2018 – Aug 2024

Zoho Corporation

Worked on B2B/B2C finance apps used by thousands of users, focusing on performance and reliability. Built offline-first flows with Core Data and a custom URL caching layer to reduce load times.

Skills

Core iOS

Swift SwiftUI UIKit Combine Core Data GCD MVVM-C REST APIs SPM (SwiftPM)

Testing & DevOps

Unit Testing UI Testing CI/CD (GitLab) Xcode Instruments

Integrations & Features

Firebase RevenueCat Push Notifications Siri Shortcuts Widgets Keychain GPS & Maps Location Services

Design & Product

Figma UI/UX ASO

Tools & Languages

Git GitLab Bitbucket Kotlin (KMP) Python HTML Tailwind CSS