I am a Dhaka-based Full-Stack and Mobile Developer and B.Sc. CSE undergraduate at United International University (UIU), currently serving as Director of Innovation at Prologic Software / Projucti.

Building software since 2019, I specialize in:

• ⚡ Realtime & Multiplayer Architectures: Authoritative state synchronization, Colyseus game rooms, WebRTC, and Mediasoup media routing.
• 📱 Cross-Platform Mobile Engineering: Production-ready Flutter and React Native applications serving enterprise and local ecosystems.
• 🤖 AI-Enabled Multimodal Pipelines: Asynchronous queued workflows, LLM orchestration (Gemini, Ollama), voice synthesis (ElevenLabs), and object storage.
• 🛰️ Hardware & IoT Telemetry: Sensor integration with ESP8266/ESP32, MQTT pub/sub pipelines, and aerospace flight-software integration.
• 🧪 Software Quality & Testing: Rigorous test suites (100–250+ automated unit, integration, and security tests) ensuring robust deployments.

Authoritative Realtime Multiplayer Board Game (3–6 Players)

• Architecture: Server-authoritative state engine using Colyseus and schema-based state sync to guarantee hidden-hand privacy and prevent client-side tampering.
• Client & Audio: Reactive client built with Vite, Tailwind CSS, Framer Motion, and procedural Web Audio effects.
• Verification: Backed by 114 automated tests covering game logic, room state, concurrency, and security rules.
• DevOps: Fully containerized with Docker, Nginx reverse proxy, and automated SSL orchestration.

AI-Driven Narrative-to-Audio-Visual Pipeline

• Asynchronous Pipeline: Converts raw text narratives into illustrated scenes and synchronized audio using background job workers (BullMQ + Redis).
• Multimodal AI: Orchestrates Google Gemini for structured scene extraction and prompting, coupled with ElevenLabs for neural voice narration.
• Resilience: Built with multi-provider failovers, signed upload URLs, and asset persistence on Cloudflare R2.

Realtime Screen-Draw & Media Collaboration Platform

• Dual Client Support: Unified codebase powering both in-browser collaboration and cross-platform desktop experiences via Electron.
• Low-Latency Transport: Utilizes Mediasoup Selective Forwarding Unit (SFU) and WebRTC for high-efficiency audio and video distribution.
• Interactive Canvas: Synchronized vector drawing, live annotations, and collaborative state management across distributed participants.

Interactive 3D/2D Pathfinding & Algorithm Visualizer

• Visual Computing: Interactive visualization of 7 core pathfinding algorithms (A*, Dijkstra, BFS, DFS, etc.) with real-time barrier editing and weight adjustments.
• Quality Assurance: Backed by an extensive 258-test suite verifying algorithmic correctness, edge-case traversals, and coordinate transformations.

Geospatial Hyperlocal Services Marketplace

• Geospatial Discovery: Connects households with local tradespeople and service providers via proximity queries and location-based discovery.
• Dual Portal Architecture: Distinct operational workflows for customers and service providers, encompassing real-time dispatch, booking, and chat.

IoT Environmental & Acoustic Telemetry Station

• Embedded Firmware: Low-power C++ firmware running on ESP8266 microcontrollers to sample environmental and acoustic signals.
• Data Brokerage: Publishes lightweight telemetry payloads over MQTT to a centralized Node.js live dashboard for remote real-time monitoring.

Core Languages
Frontend & Realtime UI
Mobile Frameworks
Backend & Realtime
Data & Cloud
AI & Workflows
Embedded & IoT

Whether you're looking to discuss realtime architectures, cross-platform mobile development, AI workflows, or engineering collaborations, my inbox is always open!

• 🌐 Portfolio & Case Studies: xrayian.is-a.dev
• 💼 LinkedIn: linkedin.com/in/xrayian
• ✉️ Direct Email: rbsmahi@gmail.com
• 🛠️ Devpost: devpost.com/rbsmahi
• 🤝 Contra Freelance Profile: contra.com/rayian_mahi_itccu389
• 🐦 X / Twitter: @xrayian