$ whoami

Rashaduzamman
Rian

<▍ />

I build scalable web & AI-powered products. 8+ years of experience shipping SaaS platforms, AI agents, and real-time systems for startups and growing businesses — from Dhaka, Bangladesh.

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01. // who I am

About Me.

Full-stack developer with 8+ years of experience building scalable web and mobile applications. I specialize in Node.js, React, and modern back-end architectures, with strong expertise in APIs, real-time systems, and AI-powered applications. I've developed complex SaaS platforms, automation tools, and AI solutions, delivering high-performance products for startups and growing businesses.

// the most amazing thing I've built

The most amazing thing I've developed is an AI-powered SaaS platform combining intelligent automation, real-time analytics, and scalable systems.

🎓 Bachelor's Degree in Computer Science — University of Asia Pacific, Dhaka, Bangladesh (2014 — 2017)

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Years of Experience

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Projects Delivered

0K+

Daily Users Served

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Years Building AI Systems

02. // my toolbox

Skills.

Node.js ✦React ✦Next.js ✦TypeScript ✦Python ✦AI Agents ✦LangGraph ✦RAG Systems ✦MongoDB ✦PostgreSQL ✦AWS ✦Docker ✦WhatsApp API ✦Twilio ✦Redis ✦Claude ✦OpenAI ✦Node.js ✦React ✦Next.js ✦TypeScript ✦Python ✦AI Agents ✦LangGraph ✦RAG Systems ✦MongoDB ✦PostgreSQL ✦AWS ✦Docker ✦WhatsApp API ✦Twilio ✦Redis ✦Claude ✦OpenAI ✦

> Languages & Core

JavaScriptTypeScriptPythonSQLPHPHTMLCSSGraphQL

> Front End

ReactNext.jsReact NativeVueTailwind CSSExpoElectronVite

> Back End & APIs

Node.jsExpress.jsFastAPIDjangoLaravelREST APIsSocket.IOMicroservicesMessage QueuesWebhooks

> AI & LLMs

AI AgentsAgentic RAGLangChainLangGraphClaude APIOpenAI APIGemini APIAI Voice AgentsPrompt EngineeringMCPVector Databases

> Databases & Storage

MongoDBPostgreSQLMySQLRedisSupabasePrismaPineconeAmazon S3

> Cloud & DevOps

AWSGoogle CloudDockerKubernetesVercelAzureCI/CDDatadog

03. // where I've worked

Experience.

2026 — Present

Senior Full-stack Product Engineer

@ Next Combinator

  • ▸Architected core back-end services for an AI-powered mobile app builder that generates functional apps from natural language prompts using Node.js and AI orchestration pipelines.
  • ▸Designed an AI video generation platform automating script generation, scene planning, and video composition with LLM workflows.
  • ▸Built agentic AI workflows translating user prompts into structured application logic, UI layouts, and back-end configurations.
  • ▸Optimized reliability with modular architecture, async processing pipelines, and efficient database interactions.
Node.jsReact NativeNext.jsAI AgentsMongoDBAWS

2026

AI Integration Developer — WhatsApp API

@ Global Healthcare Company

  • ▸Developed a scalable WhatsApp integration using Meta Cloud API, enabling real-time AI-driven conversations for a SaaS platform.
  • ▸Implemented a webhook-based messaging pipeline with async processing, improving reliability under concurrent load.
  • ▸Built an agent bridge layer connecting AI agents with WhatsApp for message transformation and multi-channel support.
  • ▸Automated check-in workflows and template messaging, ensuring compliance with WhatsApp's 24-hour messaging policies.
WhatsApp APIDjangoAI AgentsWebhooksAmazon Bedrock

2024 — 2026

Senior Back-end Leader

@ Shothik AI

  • ▸Architected production-grade agentic AI systems using LangGraph for complex multi-agent workflows with autonomous decision-making.
  • ▸Developed advanced RAG pipelines with Pinecone and Chroma vector databases, achieving 85% relevance accuracy.
  • ▸Delivered AI solutions for civil engineering, banking, and SaaS platforms, enabling intelligent automation.
LangGraphPythonMongoDBPostgreSQLRAGTypeScript

2023 — 2024

Senior Back-end Developer

@ Skills Growth Academy

  • ▸Developed a scalable online learning management platform with courses, progress tracking, and assessments.
  • ▸Implemented AI-powered content recommendations for personalized learning paths.
  • ▸Built secure video streaming infrastructure with adaptive playback and optimized bandwidth usage.
Node.jsReactMongoDBLangChainKafkaAWS

2018 — 2022

Mid-level Back-end Developer

@ FIFO Tech

  • ▸Built scalable back-end services and APIs powering a high-traffic SaaS ERP platform serving 500,000+ daily users.
  • ▸Developed full-stack web applications using React, Node.js, and modern JavaScript frameworks for enterprise and startup clients.
  • ▸Improved API response performance across high-traffic web applications with Node.js and MongoDB.
Node.jsMongoDBPostgreSQLReactSocket.IODocker

04. // things I've built

Featured Projects.

Real-time multi-agent voice AI↗

Hellokit — AI Call Center Automation

AI-powered call center platform with intelligent IVR, custom SIP infrastructure, and adaptive CRM. Multi-agent LangGraph workflows handle real-time call routing, sentiment analysis, and automated responses, with Whisper-powered live transcription and call summarization.

LangGraphTwilioSIPWhisperWebSocketsNode.js
Evidence-backed healthcare answers↗

Infection Control IQ

AI-powered infection prevention intelligence platform for healthcare professionals. Semantic retrieval over thousands of IPAC guidelines delivers precise, evidence-backed answers in seconds, with source-backed responses, regulatory updates, and policy-building tools.

RAG PipelinesSemantic SearchNode.jsHealthcare AI
Design-to-BOQ automation↗

Edapro — Construction Intelligence

AI platform for civil engineering firms that converts architectural designs into structured bills of quantities, generates AI-assisted inception reports, and provides agentic chat for project analysis and regulatory guidance.

Node.jsRAGAI AgentsDocument AI
Autonomous campaign optimization

Meta Marketing Automation Platform

AI-driven marketing automation integrating Meta APIs to manage and optimize ad campaigns at scale — analyzing performance data, generating recommendations, and automating creative updates, budget adjustments, and pausing underperforming ads.

Meta APIsNode.jsAI AutomationData Pipelines
One brain, every channel

Omnichannel AI Chatbot Platform

Multi-channel AI chatbot platform spanning WhatsApp Business, Instagram, Messenger, and web chat. LLM-based agents handle conversations, detect intent, and trigger back-end workflows like lead generation, CRM updates, and support automation.

WhatsApp APILLM AgentsNode.jsWebhooksCRM
AI medical report analysis↗

My Doctor — Digital Healthcare

Scalable AI-powered healthcare platform for Bangladesh offering telemedicine, diagnostics, and emergency services — including an AI medical report analysis engine that turns diagnostic reports into structured insights and risk indicators.

Node.jsAI AnalysisTelemedicineHealthcare

05. //what's next

Let's build something amazing.

I'm currently open to new opportunities and interesting projects — SaaS platforms, AI agents, or anything ambitious. Whether you have a question or just want to say hi, my inbox is always open.

Hire Me on ToptalSay Hello 👋

rian.mern@gmail.com · Dhaka, Bangladesh