The latest articles on DEV Community by Mohammad Sijan (@mohammadsijan). https://dev.to/mohammadsijan https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3961082%2F9989329a-d7c4-4ee6-a5cf-e21bcdb3a442.png https://dev.to/mohammadsijan en Mohammad Sijan Sun, 31 May 2026 11:19:57 +0000 https://dev.to/mohammadsijan/i-built-an-ai-assistant-for-bangladesh-introducing-rexio-1i8o https://dev.to/mohammadsijan/i-built-an-ai-assistant-for-bangladesh-introducing-rexio-1i8o <p>Most AI assistants are built for English speakers. I wanted to change that.</p> <p>RexiO is a premium AI assistant built specifically for Gen Z users in Bangladesh. It understands Bengali and Banglish naturally, searches the web in real-time, and builds a personal knowledge panel for every user — all in a fast, modern interface.</p> <h2> What RexiO Can Do </h2> <ul> <li> <strong>Real-time Web Search</strong> — RexiO searches the web live and summarizes results directly in the chat</li> <li> <strong>Personal Knowledge Panel</strong> — RexiO builds a persistent knowledge base for each user, learning preferences and context over time to deliver increasingly personalized responses</li> <li> <strong>Voice Chat</strong> — Full real-time voice interaction</li> <li> <strong>Live Weather</strong> — Ask about weather anywhere and get instant results</li> <li> <strong>Image Search</strong> — Ask for images and RexiO finds and displays them inline</li> <li> <strong>Cross-platform</strong> — Available on Android (native app) and as a PWA for desktop and iOS</li> <li> <strong>Scheduled Tasks</strong> <em>(Coming Soon)</em> — Automate recurring tasks and set scheduled prompts directly inside the chat</li> </ul> <h2> The Challenge </h2> <p>Building an AI assistant for Bangladeshi users is not just a translation problem. Users naturally mix Bengali and English in the same sentence — called Banglish. The system has to understand intent, not just language. That required building a custom multi-tier intent classification pipeline from scratch.</p> <p>On top of that, the backend had to handle real-time streaming responses, live web search, personalized memory, and voice — all simultaneously, reliably, on production-grade infrastructure.</p> <h2> Architecture Decisions </h2> <p>The backend is built as a microservice architecture with three isolated services — each chosen for what it does best.</p> <p>The public gateway prioritizes zero-latency streaming with no buffering on SSE connections. The core engine handles all stateful business logic, real-time sessions, authentication, and payments. The AI layer runs as a completely isolated service for agent workflows, web scraping, intent classification, and multi-agent coordination.</p> <p>This separation means each layer can be scaled, updated, or replaced independently without touching the others.</p> <p>The personal knowledge panel runs as an asynchronous background system — it learns from every conversation without adding any latency to the main chat response.</p> <h2> What's Next </h2> <p>RexiO is currently in development and launching soon. The goal is simple — make cutting-edge AI feel native for millions of Bangla-speaking users who deserve better than a translated chatbot.</p> <p>Check it out at <a href="https://rexio.pro.bd" rel="noopener noreferrer">rexio.pro.bd</a></p> <p><em>Built by SpritEX — a Bangladesh-based AI company.</em></p> ai nlp showdev sideprojects