
H M Naimuzzaman Shuvo
Verified Expert in Engineering
Full-stack Developer
Savar, Dhaka Division, Bangladesh
Toptal member since June 3, 2026
Shuvo is a senior product engineer with 5+ years of experience shipping real-time systems and AI-native products at US and European startups—from real-time dashboards (Datatailr NYC) to open banking and corporate payment infrastructure (Dynt.ai Amsterdam) to offline-capable cross-platform POS systems serving 200+ restaurants (Possier India). Currently, Shuvo is building 3 AI products: a RAG-powered tutor, a voice-based AI interviewer, and an autonomous browser agent workflow.
Portfolio
Experience
- TypeScript - 5 years
- React - 5 years
- WebRTC - 5 years
- WebSockets - 5 years
- Node.js - 5 years
- React Native - 4 years
- NestJS - 3 years
- AI Agents - 2 years
Preferred Environment
TypeScript, Node.js, React, React Native, NestJS, Prisma, Tailwind CSS, PostgreSQL, daisyUI, React Query
The most amazing...
...moment was when a restaurant's internet died mid-service—but the POS just kept running—the offline desktop app I built with embedded Node.js and MariaDB worked.
Work Experience
Lead Front-end Developer
Datatailr
- Architected and built the full React 19 front end for a container orchestration platform (Docker jobs, DAG workflows)—20+ routes, 270+ modules—with type-safe Apollo GraphQL and REST API via codegen and validation with Zod.
- Shipped workflow visualization (DAG graph with React Flow and Dagre, Gantt with Recharts, ANSI log viewer) so users can inspect run topology, timing, and logs in one place.
- Built reusable DataGrid (sort, resize/reorder, context menu, pagination), cursor-based pagination with reset-on-filter, and URL-synced, Zod-validated filters for shareable list URLs.
- Established API-to-UI strong type safety using GraphQL Codegen and Orval for OpenAPI-to-React Query hooks and Zod, reducing runtime errors and accelerating feature development.
- Implemented Role-based access (admin, developer, user), injectable navbar/footer, URL-driven UI action for deep-linkable modals.
- Improved performance with tiered polling, visibility-based polling, exponential backoff for Workspace Connect, and TanStack Query/Apollo defaults with targeted overrides.
Founding Software Engineer
Dynt
- Integrated GoCardless API for open banking services, providing secure accounts data access and payment initiation for customers across 30+ European banks and financial institutions.
- Engineered an automated invoice and bill processing system with OCR, decreasing processing time by 85% with detailed accuracy.
- Created a robust expense management system with real-time approval workflows, enabling efficient management of employee spending, streamlining expense management, and enhancing transparency for businesses.
- Developed a corporate card issuance system, utilizing Stripe's API for seamless generation and management of corporate payment cards.
- Introduced advanced automation workflows for categorization and reconciliation tools to match transactions seamlessly, reducing manual workload by 90%, enhancing efficiency in financial tracking, and ensuring accurate financial records.
Full-stack Engineer
Edlar Business Services Pvt
- Designed and implemented a cross-platform POS management system with real-time data synchronization for 200+ clients single-handedly, enhancing efficiency and customer experience.
- Developed a robust offline ordering desktop app by embedding Node.js and MariaDB into a Windows binary, ensuring uninterrupted service and increasing the system’s reliability by 50%.
- Reduced AWS cloud operation costs by 70% and improved system performance by managing EC2, S3, and Lambda services.
- Integrated Stripe, Google Maps, and Twilio API to facilitate payments, location tracking, and SMS notifications.
Experience
Live AI Tutor
I architected and built end-to-end: a Python back end (FastAPI + Supabase) that orchestrates Pipecat bot subprocesses connected to LiveKit rooms for sub-second voice, with Gemini 3 Flash Preview as the LLM brain and Google Cloud TTS / STT for audio. The mobile app (React Native + Expo, NativeWind v4) renders a live whiteboard on which the bot draws via structured tool calls, with full pause-and-resume across sessions. The bot's LLMContext snapshots persist per turn, allowing seamless rehydration on resume with prior board state.
I designed a chapter-scoped lesson lifecycle and a 2-stage post-session analyzer that runs Gemini structured-output passes to (1) audit each session and (2) maintain rolling per-chapter mastery state used to personalize the next session. I also designed the entire UX—an Apple-Fitness-inspired system spanning Summary, Learn, Practice, and Notes tabs, with bilingual rules (Bangla content, English chrome) baked into a locked design token palette.
AI Voice-interview Research Platform
Real-time Collaborative Coding Platform
AI Demo Agent – Product Walkthrough Generator
Skills
Libraries/APIs
React, daisyUI, React Query, Zod, WebRTC, Node.js, Socket.IO, REST APIs, OpenAPI, React Flow, Stripe API, Gocardless API, Google Maps SDK, Twilio API, Pydantic, Playwright, Python Asyncio, FFmpeg, Stripe
Tools
React Apollo, Prisma, ChatGPT, Claude, Claude Code, Agora, Vitest, RabbitMQ
Languages
GraphQL, TypeScript, HTML5, JavaScript, CSS, HTML, Python, Python 3, SQL
Frameworks
Tailwind CSS, tRPC, React Native, NestJS, Tauri, Next.js, Express.js, Swagger, LangGraph
Paradigms
Real-time Systems, Code Refactoring, Model Context Protocol (MCP), App Development, Microservices Architecture
Platforms
LiveKit, Vertex AI, Android, iOS, Amazon Web Services (AWS), AWS Lambda, Google Cloud Platform (GCP), CrewAI, AWS IoT, Azure
Storage
PostgreSQL, MariaDB, Amazon S3 (AWS S3), MySQL, MongoDB
Other
WebSockets, Gemini API, LLM Integration, Supabase, AI Voice Agents, Full-stack, Full-stack Development, Webhooks, Performance Optimization, SaaS, Real-time Data, Speech-to-Text (STT), Text-to-Speech (TTS), AI Tools, API Integration, Agentic AI, Integration, API Design, APIs, Architecture, Back-end, Command-line Interface (CLI), Analytics, Software Architecture, System Architecture, Authorization, Authentication, Data Visualization, AI Agents, LangChain, Optical Character Recognition (OCR), Expense Management, Cursor AI, ElevenLabs Solutions, Exa.ai, Pgvector, Agent Skills, Video Processing, Project Leadership, Technical Leadership, Low-latency Software, Large Language Models (LLMs), Artificial Intelligence (AI), Prompt Engineering, AI Integration, Open Banking APIs, Swan.io, Yapily API, Workflow Automation, Browserbase, Stagehand, FastAPI, BullMQ, Resend
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