# Full-site text for S M Mahmudul Hasan Canonical site: https://smmahmudulhasan.com.bd This file contains detailed, text-first information from the public homepage and consultancy page. Read the page-specific [Home Markdown](https://smmahmudulhasan.com.bd/index.md) and [Consultancy Markdown](https://smmahmudulhasan.com.bd/consultancy/index.md). This document is generated from the site's published content. ## Home page ### Profile - Name: S M Mahmudul Hasan - Headline: Human | Thinker | Engineer - Position: Builder - Company: Logic51 LLC (https://logic51.com) - Community: Triage at Express.js (https://github.com/expressjs/express) - Location: Dhaka, Bangladesh - Availability: Consultancy, Part-time, and Open-source work ### Introduction Building reliable intelligent systems, developer experiences, and business automations ### About #### Son, Husband and a Friend Before anything else, I’m a son, a husband, and a friend. These are the roles that mean the most to me, even if I don’t always get everything right. I’m someone who’s still figuring things out, learning as I go, and trying to become a little better than I was yesterday. I care about the people around me, the promises I make, and the kind of person I become along the way. I believe being there for someone matters more than having the perfect words to say. Professionally, I’m a software engineer who enjoys building things, solving problems, and understanding how things work. Over the years, I’ve found myself moving beyond writing code into making product decisions, leading teams, and figuring out how to turn ideas into something useful. Lately, I’ve been spending a lot of time exploring AI and building products of my own. There’s something deeply satisfying about starting with an idea and slowly bringing it to life. At the end of the day, I hope I build good things, do right by the people I love, and leave a little good behind wherever life takes me. #### Highlights - Founder: Logic51 LLC - Creator: Jogan Cloud - Builder: SaaS & AI-powered products - Focus: AI, System Design, Software Engineering - Background: Engineering Leadership & Product Development - Community: Express.js Member - Interests: Open Source, Developer Tools, AI Agents - Belief: Build useful things. Keep learning. Stay human. ### Skills AI Engineering, AI Application Development, AI Agents, Agentic Systems, Retrieval-Augmented Generation (RAG), RAG Architecture, LLM Integration, LLM Orchestration, AI Workflow Automation, Context Engineering, Prompt Engineering, Model Evaluation, MCP (Model Context Protocol), Software Architecture, System Design, Distributed Systems, API Design, Backend Architecture, Multi-Tenant SaaS Architecture, Database Design, Cloud Infrastructure, DevOps, Application Security, Secure Software Development, Technical Leadership, Engineering Management, Product Development, MVP Development, SaaS Architecture, Technical Strategy, System Integration, Performance Optimization, Code Review, Software Testing, Developer Tooling, Open Source Development ### Work experience ### Builder at FeedBoss AI 2026-10 to Present · Hybrid Building FeedBoss AI's next AI product, unable to share specifics due to ongoing development. - Information is not disclosed; stay tuned. - Focus: Generative AI, Vector Embedding, Agentic Workflows ### Technical Lead at Agency Handy 2025-04 to 2026-09 · Remote Led the technical team and contributed across engineering, product, analytics, user experience, and customer support while building and operating a SaaS product. - Led the technical team and worked closely with product and management - Balanced technical decisions with customer and business priorities - Built deeper expertise in SaaS operations, product analytics, and customer feedback - Focus: Technical Leadership, SaaS, Product Engineering ### Software Engineer at ZAAG SYSTEMS 2022-03 to 2024-12 · Dhaka, Bangladesh Built scalable systems and led delivery across identity, eCommerce, inventory, and multi-vendor products. - Led development of a scalable queue-based ID generation system - Built single and multi-location inventory and multi-vendor eCommerce systems - Created reusable Node.js backend templates and fine-grained AWS IAM policies - Managed project teams and delivered high-priority work - Focus: Node.js, AWS, eCommerce ### Freelance Consultant at Wabble Web 2022-02 to 2022-02 · Remote Built a client portal for monitoring CDN usage statistics. - Created a portal for clients to log in and monitor CDN usage - Focus: Consulting, Web Development ### Freelance Consultant at Multipurpose Engineering & Industrial Automation (MEIA) 2022-01 to 2022-01 · Gazipur, Bangladesh Created a certificate management portal for issuing, managing, and verifying student certificates. - Built certificate management workflows - Enabled third parties to verify certificates issued to students - Focus: Consulting, Portal Development ### Back-end Developer at Zonash 2020-12 to 2021-12 · Remote Developed and operated backend services with Express, MongoDB, JWT authentication, automated workflows, and API documentation. - Created APIs with Express and handled database operations with MongoDB - Built API authentication with JWT and wrote unit and integration tests with Jest - Automated workflows with GitHub Actions and managed Ubuntu servers - Maintained API documentation, linting, and formatting - Focus: Node.js, MongoDB, Jest ### Open-source work ### Express.js · Member Contributing to the Express.js ecosystem and community efforts. https://github.com/expressjs/express - Community support - Issue triage - Documentation improvements Focus: Node.js, Express, Open Source ### Social profiles and writing - [GitHub](https://github.com/IamLizu) - [LinkedIn](https://www.linkedin.com/in/sm-mahmudul-hasan/) - [Twitter](https://x.com/IamLizu) - [Blog](https://blog.smmahmudulhasan.com.bd) ## Consultancy page ### Consultancy Over the years, I have built RAG, MCP, SaaS products, multi-location-vendor ecommerce, A/B testing platforms, and developmed internal tools for companies to make their work easier. You can talk to me about system reviews, business automation, product ideas, and the next useful step. This is a consultation only, not implementation work. The consultancy page is for discussing a project, technical question, system review, business automation, or product idea. This is a consultation only, not implementation work. Booking a session does not hire or engage S M Mahmudul Hasan to implement a project. The booking fee covers one focused 30-minute conversation only. Any follow-on implementation work, scope, fees, and terms must be discussed and agreed separately; implementation is not included in the consultation booking. - Booking page: https://smmahmudulhasan.com.bd/consultancy - Session length: 30 minutes - Booking fee: 3 USD - Timezone: Asia/Dhaka - Booking availability: Available when time slots are published - Booking process: Select an available slot and provide your name, email address, discussion topic, and context. Payment confirms the slot when online payment is enabled. The meeting invitation is created manually and sent by email after payment. ## More information - [Concise LLM index](https://smmahmudulhasan.com.bd/llms.txt) - [Sitemap](https://smmahmudulhasan.com.bd/sitemap.xml) ## Tipping If my writing or work helped you, feel free to buy me a coffee.