Senior Mobile Engineer & Full-Stack Architect | Founder of AnZDevelopers 🚀
Building scalable, offline-first mobile apps, high-concurrency real-time systems, and interactive digital experiences.

Autonomous Senior Mobile Engineer & Full-Stack Architect with 8+ years of total software engineering experience, including 5+ years specializing in cross-platform mobile development (iOS & Android) and high-throughput real-time systems.

• 💼 Current Focus: Working as an Independent Software Consultant, partnering with clients to architect and ship production-ready mobile applications, scalable cloud backends, and low-latency real-time infrastructure.
• 📱 Store Releases: Shipped and maintained enterprise mobile applications on both the Apple App Store and Google Play Store.
• ⚡ Core Strengths: Real-time messaging (WebSockets, Socket.IO, WebRTC), offline-first sync engines with conflict-free reconciliation, push notifications (FCM & APNs), and secure local storage (Keychain / Keystore / Encrypted SQLite).
• 🚀 Founder: Building fun, productive, and innovative digital tools at AnZDevelopers.
• 🎓 Education: Master of Science (M.Sc.) in Mathematics.

Senior Mobile & Systems Consultant
2022 - Present (Current)

• Architect and develop cross-platform mobile applications (Flutter for iOS & Android) connecting to scalable cloud APIs (Node.js, Fastify, ASP.NET Core).
• Design and integrate high-concurrency real-time communication systems (WebSockets, Socket.IO, WebRTC concepts) for live telemetry, chat, and room-based dispatch.
• Implement reliable push notification infrastructure (FCM & APNs) across background, foreground, and terminated states.
• Engineer fault-tolerant offline-first architectures with idempotent event queues, encrypted local storage, and seamless sync-on-reconnect.
• Oversee full App Store lifecycle management (Apple App Store Connect, TestFlight, Google Play Console signing and rollouts).

Senior Unity (C#) Developer & Technical Lead
Sep 2022 - May 2026

• Led technical architecture and development for the core interactive application (~7,000+ LOC in C#, 60+ controllers).
• Designed structured JSON command protocols and bidirectional WebGL JavaScript bridges (.jslib) connecting web front-ends with the Unity engine.
• Built timeline-synchronized multi-channel video/audio engines, dynamic animations, and local caching under strict resource constraints.
• Integrated BLE peripheral sensors (HRV monitors, Muse EEG) with real-time biometric telemetry and ONNX ML inference.
• Authored comprehensive 11-part architecture documentation and developed custom in-engine runtime inspectors to accelerate QA cycles.

Lead Developer & Mobile Engineer (2020 - 2022)
Junior Mobile Developer (2018 - 2020)

• Led cross-functional teams developing hybrid and cross-platform mobile apps (Ionic / Angular / Capacitor) deployed to iOS and Android.
• Built sub-second real-time socket services for multiplayer interactions and chat.
• Led technical modernization efforts, establishing reusable UI component libraries, automated testing, and Git-flow workflows.

A comprehensive workforce and security management platform featuring a real-time web dashboard, high-throughput backend API, and offline-first mobile apps for field personnel.

• 🍏 Apple App Store: Famstrack Employee on App Store
• 🤖 Google Play Store: Famstrack Employee on Google Play
• 🎥 Video Walkthrough: YouTube Demonstration
• 🌐 Live Website: famstrack.com
• Tech Stack: SvelteKit (Svelte 5), Fastify (Node.js 20), TypeScript, PostgreSQL, Redis, Socket.IO, Flutter (Dart), Google Maps
• Key Highlights:
  • Offline-First Sync Engine: Resilient offline queue with UUID idempotency and deduplication; field guards complete tours and capture photo proof offline and auto-sync on reconnect.
  • Real-Time Operations: Live GPS patrol tracking, instant dispatch alerts, and live dashboard monitoring powered by room-based Socket.IO streaming.
  • Enterprise Security: Multi-tenant architecture with three-tier RBAC (Admin, Manager, Guard) and JWT token rotation.

An addictive, high-performance HTML5 and mobile puzzle game with background level synchronization.

• 🌐 Play Online: Connect Line Puzzle
• Tech Stack: Svelte 5, TypeScript, Capacitor (iOS & Android native runtime), HTML5 Canvas, SQLite
• Key Highlights:
  • Custom procedural 2D canvas rendering engine with dynamic glow effects and vector collision algorithms.
  • Bidirectional offline-first sync engine for community-published levels and global leaderboards.
  • State management powered by Svelte 5 runes ($state).

A modern web-based management GUI for MySQL and PostgreSQL databases with AI assistance.

• 💻 GitHub Repository: mmar58/Smart_Database_Manager
• Tech Stack: Svelte 5, TypeScript, Node.js, Express, Socket.IO, Tailwind CSS v4, MySQL, PostgreSQL, Ollama
• Key Highlights:
  • Real-time schema and data management with CodeMirror 6 SQL editor and visual ER diagram generation.
  • Integrated local LLMs (Ollama) for natural language SQL query generation and structural database insights.
  • Server-side paginated data grids with dynamic sorting and live updates via Socket.IO.

Performant, self-hosted media platform featuring automated tagging and timeline navigation.

• 💻 GitHub Repository: mmar58/video-gallery
• Tech Stack: SvelteKit, Node.js, Express, FFmpeg, Ollama, Socket.IO, Tailwind CSS
• Key Highlights:
  • Automated video categorization and tagging powered by local LLMs via Ollama.
  • Background FFmpeg pipeline for animated preview and thumbnail generation.
  • High-performance infinite scroll gallery and persistent, floating smart video player.

Live multiplayer betting system with sub-second resolution and crypto transaction handling.

• Tech Stack: Unity, Node.js, Redis, Socket.IO, MySQL, REST API
• Key Highlights:
  • Low-latency real-time engine delivering live betting rounds, instant bet settlements, and win/loss tracking.
  • Auditable cryptocurrency deposit, withdrawal, and transfer balance ledgers with secure game logic.

• 💼 Current Status: Available for consulting & engineering engagements as an Independent Software Consultant
• 📧 Email: rahmanapu118@gmail.com
• 🌐 Website & Portfolio: anzdevelopers.com
• 💬 Get in Touch: anzdevelopers.com/contact
• 💼 Upwork: Hire me on Upwork
• 💼 Fiverr: Hire me on Fiverr
• 🐙 GitHub: github.com/mmar58