Senior Software Engineer with 6+ years architecting and delivering enterprise-grade, multi-platform mobile applications on Clean Architecture, SOLID principles, and Dart 3 sealed-class type safety.

Currently lead architect of PAAS at Qara Digital Solutions — a single-codebase platform powering 20+ live production apps across the Saudi market, with a self-built multi-flavor CI/CD pipeline, a multi-theme control dashboard, and fully self-hosted release infrastructure.

Beyond day-to-day feature work, I own the platform's security and DevSecOps posture — Firebase App Check, RASP hardening (certificate pinning, root/jailbreak detection), and incident response when things go wrong — and I build my own AI-assisted tooling rather than just consuming off-the-shelf copilots.

Background spans full-stack web (Vue.js, React.js, Node.js, Laravel, Django) from earlier in my career, which now shows up as an advantage — I think about mobile apps in terms of the APIs and systems behind them, not just the UI layer.

class BoulesHisham {
  final String role     = "Senior Software Engineer / Mobile Architect";
  final String location = "Cairo, Egypt 🇪🇬 (Open to Remote / Relocation)";
  final String current  = "Lead Mobile Architect @ Qara Digital Solutions (KSA)";

  final List<String> expertise = [
    "Clean Architecture & SOLID Principles",
    "Dart 3 Sealed Classes & Type Safety",
    "BLoC / Cubit State Management",
    "Multi-Flavor CI/CD & Self-Hosted Runners",
    "Mobile App Security (App Check, RASP, mTLS)",
    "Firebase Full-Stack Integration",
    "AI-Assisted Dev Tooling (self-hosted LLMs)",
    "Full-Stack Background (Node.js, Django, React)",
  ];

  final String philosophy = "Build it right — not just make it work.";
}

Flutter · Dart 3 · Firebase · ObjectBox · GitHub Actions

Single shared codebase powering 20+ live production apps (Android + iOS) across the Saudi market.

• 🏗️ Feature-cluster modular Clean Architecture (/clusters/, /users/, /core/, /di/)
• ⚡ Remote Asset System (ObjectBox + Firebase RTDB) — zero app releases required for brand/theme updates
• 🔒 Dart 3 sealed-class ImageLoader — compile-time-safe image rendering
• 🔄 Self-hosted CI/CD: GitHub Actions runners on dedicated hardware + VPS, packaging every branded flavor from one codebase
• ✅ Automated CI-integrated QA pipeline (flutter_test, bloc_test, mockito) generating test-status reports on every PR

Firebase App Check · Play Integrity · RASP · mTLS

Rolled out Firebase App Check across PAAS's multi-flavor builds — Play Integrity for production, a fixed-UUID debug provider for QC/staging — layered on top of an existing RASP posture (certificate pinning, root/jailbreak detection).

• 🚨 Responded to a real security incident (a leaked private Dart package) by implementing mTLS client-certificate authentication and SSH key-based access controls for the self-hosted CI/CD pipeline
• 🧹 Followed through with full post-incident hygiene across affected infrastructure

Ubuntu · GitHub Actions Runners · Bare-Metal Hardware

Built and operate PAAS's self-hosted CI/CD on dedicated hardware (HP EliteDesk running Ubuntu) rather than relying on hosted runner minutes.

• 🔧 Debugged runner registration failures and OOM crashes under load
• 📦 Pre-installed and pinned the Flutter SDK (3.29.0) and Android SDK without a full Android Studio install
• 🔁 Rewrote the project's quality-gate as a reusable GitHub Actions workflow shared across the monorepo

RooCode · Ollama · OpenRouter · Continue CLI

Built a custom AI-assisted development setup for the PAAS monorepo rather than using default copilot tooling out of the box.

• 🧩 Custom RooCode modes tuned separately for frontend, Flutter/mobile, and DevSecOps workflows
• 🖥️ Self-hosted Ollama on a VPS running qwen2.5-coder and qwen3-coder, wired into Android Studio and VS Code via the Continue CLI

Swift · SwiftUI · macOS · AppKit

A native macOS menu bar utility that polls Jira and triggers GitHub Actions APK builds directly from the desktop — built to cut the friction of jumping between Jira, GitHub, and a terminal just to kick off a build.

• 🛠️ Worked through AppKit integration quirks and Keychain entitlement issues to get secure credential storage working natively

Flutter · Dart · Package Architecture

4 internal Flutter packages enabling code reuse across the app suite, with strict versioned API boundaries between modules.

Node.js · TypeScript · Python · Shell

Production CLI for multi-environment config orchestration with graceful API fallback. Released as v2.0.0.

Flutter · Dart · build_runner

Two open-source Flutter dev tools: build-time model code generation, and compile-time-safe access to UI resources (colors, fonts, assets).

Senior Software Engineer — Lead Mobile Architect
Qara Digital Solutions · Sep 2023 – Present · Cairo, Egypt / Remote (KSA)

Head of Mobile Development
CorporateStack Solutions · Mar 2022 – Sep 2023 · Cairo, Egypt

Full-Stack Developer
Ergasti Digital · Oct 2019 – Mar 2022 · Cairo, Egypt

• 🎓 CS50: Introduction to Computer Science — Harvard University
• 🎓 CS50: Introduction to Programming with Python — Harvard University
• 🏅 Flutter Apprentice — Google

• 🎨 Deepening front-end engineering skills — working a vanilla JS → React roadmap alongside mobile work
• 🔍 CI security scanning tooling (CodeQL, Snyk, Semgrep) and visual regression / PR preview deployment workflows
• 🌿 Git workflow refinement — rebase-first strategies, cherry-pick promotion across environments

• 🇪🇬 Arabic — Native
• 🇬🇧 English — Professional Proficiency
• 🇪🇸 Spanish — Beginner

• 💼 Senior Flutter / Mobile Engineer roles
• 🌍 Remote positions worldwide
• ✈️ Relocation opportunities
• 🧩 Freelance/contract Flutter work — active on Mostaql, with PAAS as a credibility anchor
• 🤝 Open-source collaboration on Flutter packages