Serag Sakr —Senior Flutter Developer Portfolio

About me

Building apps that
actually work

Senior Flutter Developer based in Alexandria, Egypt with 5+ years of production experience across iOS and Android platforms.

I specialize in POS systems, delivery platforms, fintech payment integrations (Stripe, Paymob, NearPay, SurePay, ZATCA), and enterprise mobile applications. I've shipped 20+ production apps — cutting crashes by 80% and boosting performance by 50%.

📍 Alexandria, Egypt 🚀 Open to Lead roles 🌍 Gulf market focus 📦 pub.dev publisher 🤝 Arabic content creator

Years Flutter

20+

Apps Shipped

80%

Crash Reduction

50%

Perf. Boost

Serag Sakr

Senior Flutter Developer · Alexandria, Egypt

Career

Work Experience

3D Systems

Senior Flutter Developer

Nov 2024 – Present

Architecting scalable POS & KDS systems. SurePay TCP/IP integration via Kotlin platform channels. MQTT real-time order sync.

Primary

Senior Flutter Developer (Part-Time)

Apr 2024 – Jun 2024

Built complete POS ecosystem: cashier, KDS, CDS & mobile cashier. Integrated Paymob & NearPay payment gateways.

Matn Solutions

Senior Flutter Developer

May 2022 – Dec 2024

Reduced crashes 80%, improved performance 50%. Introduced Clean Architecture & BLoC across legacy codebases.

ElNokhba

Mid Flutter Developer

Jul 2021 – May 2024

Developed retail & consumer apps. Shipped Mast (iOS) & Basmala with 10k+ active users. Firebase suite integration.

Freelance

Flutter Developer

Jan 2019 – Dec 2021

Built 10+ apps: e-commerce, delivery, Islamic tools & utilities. WooCommerce integrations & custom backend APIs.

Expertise

Technical Skills

Core

Flutter, Dart

State Management

BLoC, Cubit, Riverpod, Provider

Architecture

Clean Architecture, MVVM, Repository Pattern

Networking

Dio, Retrofit, REST, WebSockets, MQTT, TCP/IP

Payment Gateways

Paymob, NearPay, Stripe, Tabby, Tamara, SurePay

POS & Hardware

POS, KDS, CDS, Kiosk, Thermal Printers, Sunmi, Epson, Star Micronics, Kotlin Channels

Third-Party Integrations

WooCommerce, ZATCA e-Invoicing, Google Maps, OneSignal, Mixpanel, Intercom, Zendesk

Android SDK

Kotlin, Java, Android Studio, Gradle, AAR Libraries, Play Store, Platform Channels, NDK

iOS SDK

Swift, Xcode, CocoaPods, App Store Connect, TestFlight, Push Notifications, In-App Purchase

Firebase

Firestore, FCM, Crashlytics, Remote Config

Navigation

GoRouter, Auto Route

Testing

Unit, Widget, bloc_test, Mockito

DevOps

CI/CD, GitHub Actions, Fastlane, Git

Platforms

Android, iOS, Tablet, Kiosk, Windows

Languages

Dart, Kotlin (native channels), Python

pub.dev Packages

Open Source Packages

Flutter & Dart packages published on pub.dev — covering fintech, POS, e-commerce & invoicing

pay_with_paymob_flutter

Likes

135

Points

173

Downloads

A comprehensive Flutter plugin for integrating Paymob payment gateway. Supports Unified Checkout, Intention API, iFrame payments, payment links, digital wallets, and installment services.

SDK Flutter Android iOS macOS Windows

v1.0.2 · GPL-3.0 View on pub.dev

sure_pay_plugin

Likes

160

Points

Downloads

A Flutter plugin for integrating SurePay POS payment terminals over TCP/IP. Supports purchases, reversals, reconciliation, authorization, and refunds via a clean typed Dart API.

SDK Flutter Android

v0.0.1 · MIT View on pub.dev

woocommerce_plugin

Likes

105

Points

134

Downloads

A comprehensive Flutter/Dart package for the WooCommerce REST API (v3). Supports products, orders, cart, checkout, coupons, categories, attributes, variations, and JWT authentication.

SDK Dart Flutter Android iOS Linux macOS Windows

v2.0.0 · MIT View on pub.dev

zatca_2_invoice_generator

Likes

115

Points

Downloads

⭐ Most Liked · 10 Likes

Plugin for generating ZATCA Phase 2 compliant invoice QR codes. Used for Saudi Arabia e-invoicing compliance with full platform support.

SDK Flutter Android iOS Linux macOS Web Windows

v9.0.0 · MIT View on pub.dev

Open Source Packages

Let's buildsomething great

Let's build
something great