Open to opportunities

Ach Mad

@achmad

Senior mobile developer specializing in iOS (Swift) and Flutter, delivering production apps with strong security and quality.

Indonesia

Message

What I'm looking for

I’m looking for a senior remote role where I can own mobile architecture and delivery for iOS/Flutter, improve code quality with testing, and apply strong security/offline-first practices—shipping production features end-to-end with CI/CD and smooth Store releases.

I’m a results-driven Senior Mobile Developer with 12+ years of experience shipping production-grade iOS and cross-platform applications used by millions of users. I’ve led end-to-end delivery—from architecture through production release—while keeping code quality high and teams aligned on sprint outcomes.

At MyTelkomsel, I led the Shop & Payment squad for one of Indonesia’s most downloaded apps, overseeing sprint planning, feature delivery, and code quality. I refactored a monolithic payment module into a modular architecture (reducing the codebase from 5,000 to 2,000–3,000 lines) and improved delivery speed (reducing effort from 32 to 16–24 story points). I also enforced 100% unit test coverage per feature using XCTest, and delivered high-impact features end-to-end with QA collaboration and App Store releases.

I’m equally strong in mobile security audits (AES/RSA, SSL Pinning), offline-first architecture, and CI/CD automation, including full App Store & Play Store deployment workflows and in-app subscriptions (StoreKit / Google Play Billing). Recently, I independently designed and shipped VocabFlow (iOS + Android) using a custom SRS algorithm, and I’ve also done freelance work like a cooperative banking security audit and a Flutter UI/UX revamp—plus a cross-platform WMS with offline-first behavior and automated CI/CD. I’m actively seeking senior-level remote opportunities where I can contribute immediately.

Experience

Work history, roles, and key accomplishments

Current

Founder & Lead Developer

Current

VocabFlow

Nov 2025 - Present (6 months)

Solo-designed and shipped VocabFlow (iOS + Android), implementing a custom spaced repetition system to personalize learning schedules. Published through App Store and Play Console with in-app subscriptions via StoreKit and Google Play Billing.

Flutter MVVM BLoC Clean Architecture Firebase Firestore Google Play Billing

Independent Development

Self-Directed

Aug 2025 - Apr 2026 (8 months)

Completed an intensive English course and self-directed upskilling in web technologies (JavaScript/TypeScript, React, and Next.js) to support international remote collaboration. Provided freelance maintenance and feature delivery for production apps, and independently designed and shipped VocabFlow across iOS and Android with in-app subscriptions.

Javascript (ES6)TypeScript React Next.js React Query Zustand Google Play Billing

Mobile Security Consultant

Cooperative Banking App

Oct 2025 - Mar 2026 (5 months)

Performed a full mobile security audit and implemented AES/RSA encryption, SSL pinning, and secure local storage for a financial app. Redesigned the iOS and Android UI using Flutter to improve navigation flow and user engagement.

SSL Pinning Local Storage Flutter IOS Security Hardening

Cross-Platform Developer

Warehouse Management System

Jul 2025 - Mar 2026 (8 months)

Built a warehouse management solution for Android handhelds and Windows desktop using Flutter with an offline-first architecture. Implemented CI/CD with GitHub Actions, real-time stock sync, barcode/QR scanning, and automated reporting.

Flutter Dart Windows Desktop Development

Senior iOS Developer

Phincon

Aug 2022 - Jul 2025 (2 years 11 months)

Led the Shop & Payment module squad for MyTelkomsel, overseeing sprint planning, feature delivery, and code quality for an app used by tens of millions of users. Refactored a monolithic payment module into a modular architecture, reducing code from 5,000 lines to 2,000–3,000 and new payment integration effort from 32 to 16–24 story points while enforcing 100% XCTest unit coverage per feature.

Swift iOS Development Modular Architectures XCTest StoreKit In App Subscriptions Payment Integration App Store Connect

Senior iOS Developer

Snipitz

Jul 2021 - Aug 2022 (1 year 1 month)

Built and maintained a real-time live streaming iOS platform focused on performance, stability, and user engagement. Refactored a legacy codebase and implemented streaming enhancements to improve app reliability and crash-free rate.

Swift iOS Development Live Streaming Performance Optimization App Store Connect TestFlight Crash Analysis RESTful APIs

Mobile Developer

PT Digital Media Group

Jan 2018 - Sep 2021 (3 years 8 months)

Developed the DealMedan and DealJava mobile apps using Swift, Firebase, RESTful APIs, and MapKit. Participated in code reviews and agile ceremonies to maintain code quality across the mobile team.

Swift Firebase RESTful APIs iOS app development Code Review Agile Scrum

Lead Mobile Developer

PT DIYO Solusi Digital

Aug 2019 - Jul 2020 (11 months)

Architected and built the DIYO App and DIYO Merchant App from scratch using Flutter, BLoC, and clean architecture, including QR scanning, e-wallet, order management, and a merchant dashboard. Led and mentored a team of 5 frontend developers and integrated Firebase Cloud Messaging plus real-time transaction sync to support a seamless financial UX.

Flutter Dart BLoC Clean Architecture IOS Android Development

Mobile Developer

PT Global Bersama Utama

Nov 2014 - Jan 2018 (3 years 2 months)

Built Merdeka.com and Kapanlagi.com mobile apps and developed FIELDQ for PT Sampoerna Phillip Morris using Objective-C. Implemented Core Data, MapKit, and Firebase in production apps supporting large user bases.

Objective C iOS Development Core Data Firebase