Ahmad ZakyWisnumurti

iOS Engineer

I build secure, scalable iOS applications and help teams maintain them over time.

Email LinkedIn GitHub

Experience

Oct 2023 - Present
Aleph-Labs
iOS Engineer
Creative engineering company headquartered in Singapore and operating across the Asia Pacific.
- Maintained iOS applications and improved user experience and performance by roughly 15%.
- Implemented robust app architectures that improved development speed and long-term maintainability.
- Collaborated closely with other developers through code review and pair programming sessions.
- Implemented push notifications to improve user interaction and retention.
Dec 2022 - Aug 2023
Privy
iOS Engineer
Digital signature and trusted identity platform focused on secure workflows at scale in Indonesia.
- Worked closely with UI and UX designers to ship intuitive product experiences that supported a 4.8 App Store rating.
- Reduced dependence on third-party networking libraries by engineering a custom URLSession-based network layer.
- Initiated unit testing for gamification features and increased coverage to around 70%.
- Modularized feature areas to improve scalability and code reuse.
Oct 2021 - Dec 2022
Ruangguru
Software Engineer (iOS)
Large education technology company focused on digital learning services across Indonesia.
- Revamped iOS architecture through modularization and helped reduce app load time by about 10%.
- Implemented Keychain-based local data handling to improve application security.
- Migrated engagement and gamification features to newer architecture patterns while preserving expected behavior.

Skills

Swift
SwiftUI
UIKit
Async/Await
Combine
SPM
Core Data
Unit Testing

Languages: Indonesian and English

Education

B.E. Electrical Engineering
Universitas Gadjah Mada, Indonesia
2016 - 2020
Apple Developer Academy Graduate
2021
iOS Lead Essentials
Essentials Developer by Caio and Mike
2024

Selected work

Privy Digital Signature App

Digital signature product built with Swift and UIKit using a modular MVVM architecture.

Modular MVVM architecture focused on maintainability and feature isolation.
Custom URLSession-based networking layer for core product flows.
Unit testing around key gamification features.

Ruangguru Learning App

Learning app improvements focused on security, scale, and long-term maintainability.

Secure local data management using Keychain for sensitive information.
Migration from MVC toward more scalable MVVM-based modules.
Regression-minded testing for revamped features.

Articles