Hello World, I amAli Ahsan Mohammad Mojahid
Software Developer with 4+ years of experience delivering full-stack, mobile (Android, iOS), backend, and AI-powered applications. Proven track record building scalable systems, real-time communication platforms, enterprise automation tools, and AI-powered solutions used in production environments. Experienced across the full software development lifecycle, from architecture and infrastructure design to deployment and optimization, with strong expertise in full-stack development, cloud technologies, API design, and AI integration. Recognized for transforming complex requirements into practical, high-quality solutions that drive business value and operational efficiency.
Professional Journey
A interactive timeline of software engineering accomplishments, AI integrations, mobile architectures, and high-performance server administration.
Software Developer
Vice President, Development Wing
Software Developer
Software Developer — Freelance & Open Source
AI/ML Developer — Independent & Freelance Projects
Cloud & Server Administrator — Independent & Freelance Projects
Software Developer
Overview & Scope
Build and maintain Android applications using clean architecture and real-time features. Deliver full-stack features across web and mobile applications, manage CI/CD pipelines, Docker deployments, and system performance on cloud servers, and integrate AI/LLM-based automation into production applications.
Technologies & Stack
Software Developer
Build and maintain Android applications using clean architecture and real-time features. Deliver full-stack features across web and mobile applications, manage CI/CD pipelines, Docker deployments, and system performance on cloud servers, and integrate AI/LLM-based automation into production applications.
Vice President, Development Wing
Lead development initiatives for club projects, overseeing Web and Applications built with clean architecture and real-time features. Guide delivery of full-stack features across club applications.
Software Developer
Built and maintained Android applications with clean architecture and real-time features. Delivered full-stack features using React, Next.js, and Fastify within Agile teams. Managed CI/CD pipelines, Docker deployments, and system performance on cloud servers, and integrated AI/LLM-based automation into production applications.
Software Developer — Freelance & Open Source
Delivered multiple production applications in Java and Kotlin Multiplatform using Jetpack components, published to the Google Play Store and Apple App Store. Implemented real-time SIP/VoIP calling (Linphone SDK, PJSIP), push notifications (Firebase and custom backends), payment integrations (Stripe, bKash, Nagad), and WebSocket live services.
AI/ML Developer — Independent & Freelance Projects
Built AI call assistants and web-based voice systems using OpenAI Whisper (STT), GPT (NLP), and TTS pipelines integrated with FreePBX/PJSIP for real-time SIP call handling with sub-2-second response latency. Developed RAG-based enterprise chatbots using LLaMA, Groq API, and LangChain, enabling document-grounded Q&A with role-based access control for business clients. Created AI agentic systems capable of autonomous multi-step task execution, administrative analytics, and workflow automation for enterprise use cases. Integrated AI/ML features into applications using on-device and cloud-based inference pipelines with Python and OpenAI APIs.
Cloud & Server Administrator — Independent & Freelance Projects
Designed and managed scalable, secure infrastructure on AWS EC2 and Alibaba Cloud, including automated provisioning, load balancing, and SSL termination via Nginx and Cloudflare CDN/DNS. Administered Ubuntu/Debian Linux servers; built Docker containers and maintained high-availability environments for production-grade applications. Hardened server security with SSH key management, UFW firewall rules, fail2ban, and automated backup/disaster recovery procedures.
Skills & Capabilities
// Diagnostic overview of core programming languages, frameworks, AI platforms, cloud architecture, and database engines.
Engineering Exp
Mastered Tools
Core Domains
Production Ready
Languages & App Development
Native Android & iOS, KMP multiplatform, and core programming languages
Backend, APIs & Frontend
Full-stack web engineering, real-time microservices, and modern UI
AI & ML & Real-Time Systems
RAG, AI voice agents, agentic systems, and VoIP telephony
Databases, Cloud & DevOps
Scalable persistence, cloud infrastructure, containers, and deployment automation
// Core_Technology_Stack
Production Tools & ArchitecturesFeatured Projects
Deployments of SaaS systems, interactive client dashboards, and cross-platform native smartphone apps.
Wholesale Plus
Designed and developed a full-featured mobile application with an accompanying e-commerce website; published on the Google Play Store.
Urbane Cleaning
Architected and shipped a booking website for an Australian cleaning service provider.
WholesalePlus BD
Architected and delivered a full-scale dropshipping platform integrated with China's 1688 wholesale marketplace, including a web application, mobile app, and real-time administrative dashboard.
DIU Smart Proctor
Architected and shipped a university-adopted AI-powered proctoring system featuring activity monitoring, Supports Students, and a live admin dashboard. Deployed at Daffodil International University (2024).
AI Voice Call Assistant
Built an end-to-end AI phone call assistant using OpenAI Whisper (STT), GPT (dialogue), TTS, and FreePBX/PJSIP for live SIP telephony, achieving sub-2-second response latency via streaming audio and asynchronous processing.
RAG Knowledge-Base Chatbot
Built an enterprise document chatbot using Retrieval-Augmented Generation (RAG) with LLaMA, Groq API, and LangChain, enabling grounded Q&A over private knowledge bases with role-based access control.
PDF-to-Audio API
Built a Node.js REST API that extracts PDF text and converts it to MP3 using Google TTS; fully open-source and publicly available on GitHub.
Internet Speed Meter
High-performance network speed monitor and statistics tracker for the GNOME Shell top panel. Works on Linux GNOME-based desktops (Ubuntu, Debian, Fedora, and many more).
Copilot Amplify
Extend GitHub Copilot Chat, which provides an extra AI model in the official GitHub Copilot Chat panel.
Lumis — A Mini Compiler
An Educational Compiler & Execution Engine for Compiler Design Course Built in C using Flex (Lexer) and Bison (Parser).