💻 Software Engineer | Backend Systems | AI & LLM Applications

I design and build scalable backend systems and AI-powered products used in real-world business environments. With 4+ years of experience, I specialize in system design, distributed architectures, and production-grade APIs, with a strong focus on AI-driven automation and performance optimization.

• 🎓 BSc in Computer Science & Engineering (CGPA: 3.86)
• 💼 Software Engineer working on AI-powered and scalable systems
• 🏗️ Strong expertise in System Design & Distributed Architecture
• ⚡ Focused on performance, reliability, and clean code
• 🤖 Hands-on with LLMs, NLP, and intelligent automation systems
• 👨‍🏫 Mentor developers and contribute to engineering excellence

• PHP (Laravel) — REST APIs, Queues, Caching, Job Processing
• Python (Django, FastAPI, Flask) — AI services & scalable systems
• Node.js (Express) — Microservices & lightweight APIs

• LLM Applications (LangChain, RAG systems)
• AI Agents & Workflow Automation
• NLP & Semantic Search
• Deep Learning (CNN models)

• MySQL, SQLite
• Docker, Docker Compose
• AWS, VPS Deployment
• Git, Bitbucket

• React.js, Nuxt.js
• API Integration (Meta, Telegram, Google, third-party services)

• 🔧 Build scalable RESTful APIs & backend systems
• 🏗️ Architect distributed and high-performance systems
• 🤖 Develop AI-powered automation platforms
• 🔗 Integrate complex third-party ecosystems (Meta, messaging APIs)
• 📊 Build data-driven intelligent applications
• ⚙️ Optimize performance, scalability, and reliability

🔗 https://roktokhuji.com/

A technology-driven blood donor platform built to reduce the time required to find emergency blood donors in Bangladesh.

• Enables users to search blood donors by blood group and geographic location
• Supports a complete administrative hierarchy (Division, District, Upazila, Union)
• Built scalable REST APIs and optimized database queries for fast donor discovery
• Provides donor registration, profile management, and location-based filtering
• Designed to improve emergency response through accessible digital infrastructure

Tech: Laravel, MySQL, REST APIs, Bootstrap, Hierarchical Database Design

🔗 https://lilyra.com/

AI-powered automation platform for modern businesses (F-commerce & support systems)

• Built a 24/7 AI automation system for Facebook-based businesses
• Developed intelligent support bots for high-volume interactions
• Implemented brand-aware AI models tailored to business workflows
• Designed scalable backend for real-time messaging & AI processing
• Enabled automated Q&A and customer support workflows

🔗 https://cover-letter-generate.lilyra.com/

• Generates personalized cover letters using AI
• Analyzes job descriptions and resumes
• Produces context-aware professional content

🔗 https://www.fns24.com/

• Production-grade online news platform
• Handles high-frequency publishing & multiple categories
• Optimized backend for performance and scalability

🔗 https://newspaperlist.org/

• Centralized global newspaper directory system
• Structured indexing for fast access
• Aggregates multiple sources in one platform

• Real-time emergency response system
• Location-based rescue coordination
• Fail-safe SMS alert system

• Retrieval-augmented AI system
• Web scraping + semantic search integration
• Context-aware response generation

📄 https://www.mdpi.com/2504-2289/8/7/80

• Deep learning model for medical imaging
• 93% Accuracy | 98.6% AUC | 97% R²

🔗 https://doppar.com/

• Contributed to a high-performance modern PHP framework
• Worked with ORM, architecture, and AI integrations
• Improved understanding of scalable backend systems

• Advanced LLM systems & optimization
• Multi-agent AI architectures
• Scalable AI infrastructure
• Prompt engineering

• ✅ Solved 100+ problems on LeetCode
• 📄 Published research in AI & Deep Learning
• 🚀 Built real-world production systems

• 💼 Backend / Software Engineer roles
• 🌍 Open to Remote (US, Europe, UAE)
• 🇺🇸 Interested in US roles (visa sponsorship)

• 💼 LinkedIn: https://www.linkedin.com/in/arshahin/
• 📺 YouTube: https://www.youtube.com/@arshahin9803
• 📘 Facebook: https://www.facebook.com/arshahin201

⭐️ Building scalable systems, AI products, and automation that create real impact.