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Shariyer Shazan
Backend Engineer (Node.js, NestJS, Microservices)
I design & build
I am a Backend Engineer focused on designing production-minded server architectures. I specialize in building scalable backend systems and distributed microservices using NestJS, Node.js, gRPC, Kafka, PostgreSQL, MongoDB, Redis, and Docker, alongside integrating advanced AI/LLM solutions via OpenAI API, LangChain, and the Model Context Protocol (MCP). Through development of enterprise platforms like Waave, I have engineered event-driven workflows, secure Double Ratchet-based E2EE chat, and autonomous AI agents designed to execute tasks across multi-service APIs cleanly and reliably.
01.Technical Arsenal
Backend & Databases
DevOps & Cloud
AI & LLM Integration
Architecture & Design
Core Languages
Frontend
Payments
Tools & Platforms
Interpersonal Skills
02.Experience
Full Stack Developer (Backend-Focused) @ Betopia
AUG 2025 – PRESENT | DHAKA, BANGLADESH
Engineered the backend for a health & weight-management platform covering 5+ body metrics, subscription-gated provider access, and secure payment processing.
Delivered an AI meal-recommendation engine (3 input modes: text, voice, image) generating 3 daily targets — calorie, protein, water — plus a provider marketplace and admin panel driving 2 revenue streams.
Shipped 3 production full-stack applications (Node.js, NestJS, PostgreSQL, MongoDB) with Socket.IO and Stripe, and streamlined CI/CD (Docker + GitHub Actions) on AWS across all projects.
03.Featured Projects
Waave — Enterprise Microservices Social Platform
Engineered a high-performance, production-minded NestJS microservices platform. Implemented synchronous gRPC service communication and decoupled asynchronous domain events (OTP validation, signup flows, feeds rebuilding) via Apache Kafka. Designed 10 distributed services including a Double Ratchet end-to-end encrypted (E2EE) chat service and an autonomous AI Agent integration using the Model Context Protocol (MCP) standards. Managed multi-tier isolated Redis caches, PostgreSQL/Prisma SQL replication, and MongoDB/Mongoose NoSQL replica sets.
Key Highlights:
AI-Powered Health & Weight Management
Established user profiles based on 5+ health metrics with subscription-tiered access to certified providers. Created an AI meal-recognition engine accepting text, voice, and image input to auto-generate 3 daily nutrition targets.
Key Highlights:
Finn — Real-Time Auction & Classified Ads Marketplace
A premium, NestJS-based monolithic auction and classified marketplace platform. Built with a full-featured bidding system, real-time messaging, map-based geospatial ad search, and Stripe Connect integration for automated platform fee splitting.
Key Highlights:
04.Education
B.Sc. in Computer Science and Engineering
Southeast University
Higher Secondary Certificate (HSC)
BAF Shaheen College
05.Get In Touch
Let's engineer something great.
Whether you have an enterprise system to build, backend pipelines to optimize, or are looking to expand your engineering team, my inbox is always open.
