Syed Mehedi Hasan Nirob
Verified Expert in Engineering
React Developer
Patuakhali, Barisal Division, Bangladesh
Toptal member since November 7, 2024
Nirob started his professional journey in 2016 as an app developer and is now managing an engineering team. He is the founding engineer of Retune, an AI chatbot builder. In the last five years, he has been part of the core software engineering team at three YC-funded startups and several other projects. He built core features, contributed to their MVP, and helped them scale up. Web app development in TypeScript and JavaScript libraries and frameworks is his main expertise in the IT industry.
Portfolio
Experience
- TypeScript - 5 years
- React - 5 years
- CSS - 5 years
- MySQL - 4 years
- Tailwind CSS - 4 years
- Next.js - 4 years
- Node.js - 3 years
- React Native - 2 years
Preferred Environment
MacOS, Linux, iOS, Visual Studio Code (VS Code), GitHub
The most amazing...
...thing I developed was an AI chatbot builder with my friends that we launched on AppSumo, which now has 20,000 users.
Work Experience
Vapi Voice Bot Developer
Kad AI
- Implemented end-to-end VAPI order ingestion pipeline (tool/webhook payload handling, schema validation, fallback parsing, idempotency, and secure webhook handling) to reliably capture call-based orders.
- Built a full multi-tenant architecture (organizations, org switching, memberships, and invitation-based onboarding) with proper org-level data isolation for bots, locations, and team access.
- Developed an owner-facing Orders Queue module with filters, pagination, and order detail views, powered by back-end APIs and org authorization checks.
- Delivered production-ready order notifications via Resend (email) and Telnyx (SMS), including recipient resolution, per-org opt-in logic (send_sms_email), and detailed provider-level error logging.
- Stabilized and extended integrations/admin workflows across the portal: multi-bot support, per-location bot assignment, improved test-connection diagnostics, and migration-safe database upgrades for fast iteration in production.
Developer for AI-powered customer service
Henrique Torres
- Designed and implemented a production-grade WhatsApp AI assistant using Twilio, Chatwoot, and n8n, enabling automated customer interactions, order processing, and real-time responses.
- Built an LLM-powered conversational pipeline with intent detection, structured JSON outputs, and dynamic response generation, achieving 95%+ intent classification accuracy and significantly improving automation reliability.
- Developed scalable workflow automation using n8n, orchestrating multi-step processes including product lookup, validation, database operations (PostgreSQL), and external API integrations.
- Implemented human-in-the-loop system architecture, allowing seamless handoff between AI and support agents via Chatwoot inbox, improving customer experience and operational efficiency.
React/Node.js Healthtech Deployment Specialist
Sunnyboy Publishing Ltd
- Built a full-stack healthcare platform from the ground up.
- Implemented authentication, an admin dashboard, AI-driven chatbots, and secure digital storage.
- Helped prepare the product for launch by iterating on the UI and resolving critical bugs.
Developer for Chatbot Application
FRESH TV INC.
- Built an admin dashboard to monitor live YouTube chat messages in real time using the YouTube Live Streaming API.
- Integrated a system to fetch keyword-specific responses from a predefined document for efficient and context-aware replies.
- Enabled real-time response functionality, allowing admins or bots to send customized or predefined replies directly into the live chat.
Founding Engineer
Retune
- Took demo calls for potential users, created a Discord community for product discussion, and gave technical support to the users.
- Developed the retune web app by implementing core features like embedding to train chatbots with data, showing responses using AI models, capturing info, etc. I also worked on both the front and back end.
- Led the engineering team and got 20,000 users for our AI chatbot builder during this process.
Front-end Software Engineer
Gerald (YC W21)
- Redesigned the mobile app UI for both Android and iOS and added a few small features.
- Improved the landing page UI with an updated design and fixed responsiveness on different devices.
- Addressed different product feedback and fixed the issues accordingly.
Software Engineer
Replo (YC S21)
- Joined Replo right after the founders got into YC, and built the MVP for Replo, which is a visual React application builder for Shopify.
- Developed core parts of the application, including visual editor, drag-and-drop features, and CRM integration with Shopify.
- Fixed bugs and helped to scale up this product at the early stage.
App Developer
AnyConnect
- Worked on the app, which was developed in Objective-C and used libraries written in C to stream smart camera data.
- Built the system for UI testing and wrote Unit tests for the iOS app.
- Shared feedback to the back-end engineering team that helped to improve the streaming quality.
Software Engineer
AlgoMatrix
- Developed an iOS content aggregator app from scratch using Swift.
- Fixed bugs and UI issues throughout the app development process and approved the app for the iOS app store.
- Designed and implemented RESTful APIs for projects in JAVA SpringBoot.
Experience
10xlaunch
Thybrid AI
Education
Bachelor's Degree in Computer Science
Shahjalal University of Science and Technology - Sylhet
Skills
Libraries/APIs
React, Node.js, Stripe, OpenAI API, WhatsApp API
Tools
Prisma, n8n, Expo, Slack, Xcode, GitHub, Chatbox, Google Development Tools
Languages
TypeScript, CSS, JavaScript, HTML, SQL, HTML5, Swift, Python, Java, C++, Objective-C, C
Frameworks
Next.js, Tailwind CSS, React Native, LangGraph, Express.js, Laravel, Angular, Django
Paradigms
UI Design, Scalable Application, B2C, Mobile Development, Unit Testing, B2B, Automation
Platforms
iOS, Visual Studio Code (VS Code), Amazon Web Services (AWS), Firebase, LangSmith, Android, Replit, MacOS, Linux, Google Cloud Platform (GCP), Azure, Docker, Vercel, PlanetScale, Twilio, Amazon EC2, Telnyx
Storage
MySQL, PostgreSQL, Databases
Industry Expertise
Web Design, Healthcare
Other
Mobile Apps, Full-stack Development, Web Development, Chatbots, API Integration, OpenAI, Front-end, Full-stack, Back-end, Open-source LLMs, AI Programming, Single-page Applications (SPAs), User Interface (UI), Websites, User Experience (UX), APIs, Payment Gateways, AI-enabled Applications, Debugging, Supabase, Generative Pre-trained Transformers (GPT), AI Agents, AI Engineering, Agentic AI, Prompt Engineering, Workflow Automation & System Integration, Machine Learning, Security, SaaS, Open Banking, AI Voice Agents, Text-to-Speech (TTS), Mobile App Development, Fintech, Mobile Payments, Minimum Viable Product (MVP), Artificial Intelligence (AI), Customer Relationship Management (CRM), LangChain, Retrieval-augmented Generation (RAG), FastAPI, Framer, Competitive Programming, Software Engineering, Discord, Automated UI Testing, AI Chatbots, Landing Pages, Discord Bots, Bots, Payment Processing, Digital Resources, Healthtech, Large Language Models (LLMs), WhatsApp Business, Quality Assurance (QA), Integration, Admin Panels, Voice, POS, Supabase Auth, Webhooks, Resend
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