Secure iOS apps for banking & payments.
I build mobile banking apps, merchant QR payments, and payment SDKs that real customers rely on every day, with a focus on security, stability, and release quality.
Phnom Penh, Cambodia · Currently at Vattanac Bank
- Years building iOS7+
- Apps live on the App Store2
- Production crash rate<0.5%
- 618 App Store ratings4.4★
Products in customers' hands.
Production apps and an SDK for Vattanac Bank, used by real customers and merchants in Cambodia.
Vattanac Bank
Vattanac Bank's retail iOS app handles customers' daily account and payment journeys: onboarding, transfers, cards, and a customizable home screen. I deliver features, fixes, and security improvements in the app as part of the mobile team.
Vattanac Bank Merchant
A companion app that lets Vattanac Bank account holders accept QR code payments as merchants. They can generate a KHQR code, enter an amount, confirm payment, and track business income from an iPhone.
Payment Gateway SDK
An iOS SDK that merchants embed in their own apps to take payments through Vattanac Bank's payment gateway. I built it and continue to maintain it.
- Merchant appIntegrates the SDK
- Payment SDKSDKSecure flow in one place
- Payment gatewayVattanac Bank
- BankSettlement
Built for trust, shipped with care.
Secure by default
Security and encryption are part of every feature, from the first estimate to the release, not a separate checklist at the end.<0.5%
Reliability first
Production crash rate maintained on the banking apps I work on.Payments & QR
Payment flows, merchant enablement, and KHQR transactions, including the SDK merchants integrate with.Full SDLC, cross-functional
I turn business requirements into estimates, plans, and release-ready work with product, QA, backend, and security teams, and raise risks early.
7+ years of native mobile.
From a software house to two banks, moving from client apps to banking apps and payment infrastructure.
Phnom Penh, Cambodia
- Built and maintained a payment gateway iOS SDK to simplify and secure merchant integration
- Shipped a merchant app that allows Vattanac Bank account holders to accept QR code payments
- Delivered features, fixes, and security improvements in the main Vattanac Bank iOS app
- Helped maintain production crash rates below 0.5%
- Worked on banking apps, merchant tools, payment SDKs, reliability, and security-focused delivery
- Swift
- iOS SDK
- Payment Gateway
- QR Payments
- Security
- CocoaPods
- SPM
Phnom Penh, Cambodia
- Built native banking features across iOS and Android
- Worked with Swift, Objective-C, and Kotlin
- Translated business requirements into technical plans, estimates, and release-ready tasks
- Implemented security and encryption features
- Raised technical and performance risks early during delivery
- Swift
- Objective-C
- Kotlin
- Security
- Encryption
- SDLC
Phnom Penh, Cambodia
- Grew from Junior iOS Developer into broader native mobile delivery across iOS and Android
- Handled full life-cycle development, troubleshooting, and reusable library work for client apps
- Mentored junior developers
- Contributed to CI/CD, code review, and knowledge-sharing practices
- Swift
- Objective-C
- Kotlin
- CI/CD
- Mentoring
- Code Review
Hi, I'm Vital.
Based in
Currently
I'm an iOS developer with 7+ years of experience building native mobile products, with a strong focus on banking, payments, merchant tools, and SDK development.
My work centers on secure architecture, smooth app behavior, and release quality that holds up for real users at scale.
Currently open to iOS product roles in banking, fintech, and trust-heavy mobile teams.
Languages & Frameworks
- Swift
- Objective-C
- Kotlin
- SwiftUI
- UIKit
Architecture & Patterns
- MVVM
- MVC
- Coordinator Pattern
- Clean Architecture
- Protocol-Oriented Programming
Tools & Package Management
- Xcode
- CocoaPods
- Swift Package Manager
- Git
- Fastlane
- CI/CD
Specializations
- Mobile Banking Apps
- Payment SDKs
- Merchant QR Flows
- Security & Encryption
- Performance Optimization
- Stability Engineering
Delivery & Collaboration
- SDLC
- Agile/Scrum
- Technical Estimation
- Release Management
- Cross-functional Delivery
Royal University Phnom Penh · 2022 – 2024
Royal University Phnom Penh · 2013 – 2018
Paññāsāstra University of Cambodia (PUC) · 2013
“Vital is a genuinely nice loving human being, a great person and colleague to us, a hardworking and talented resource, he never says no to any tasks being assigned or asked to help and always looking for helping his teammate as much as he could, it does not matter what time was it he was always there to help.”
Watching him walk away from my very own team is painful as a teammate, but also happy for him to grow and get higher in his career and can only be jealous of the next team he will be working with.
Pherum Un
Lead Development · Digital Banking
Managed Vital directly · May 2023
Let's build something people trust.
I'm open to iOS product roles in banking, fintech, and trust-heavy mobile teams. Let's connect.