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mhasan-cmt/README.md

mhasancmt

A S M Mahmudul Hasan

Backend & Cloud Engineer Β· Java Β· Spring Boot Β· AWS

Building AI voice, automation, and cloud systems in production. Doing applied ML research on the side.

LinkedIn

ORCID Location


πŸ‘¨β€πŸ’» About Me

I build backend systems for voice, automation, and cloud infrastructure. For the past three-plus years at VoiceCradle I've designed and shipped the systems behind an AI-powered customer communication platform: Amazon Connect IVR call flows, Amazon Lex and LLM-backed chatbot layers, Lambda and DynamoDB services, and the real-time dashboards the team uses to run it.

Before that, at USAHomeBid, I worked on API performance and database optimization for a real-estate platform, using query optimization and caching to significantly cut page load times.

I'm most interested in event-driven architecture, distributed systems, and running AI in production. My stack is Java/Spring Boot on AWS, plus Python and Docker. On the research side, I work on transfer learning for medical image classification.

  • πŸ”­ Currently: AI voice & IVR automation on Amazon Connect Β· cloud-native backend systems
  • ☁️ AWS Certified: Solutions Architect – Associate, Cloud Practitioner
  • πŸ“Š Research interests: transfer learning, medical image classification, data leakage in ML evaluation, speech processing
  • 🐳 DevOps: Docker, Nginx, Linux, CI/CD, observability (OpenSearch / ELK)
  • πŸŽ“ Education: B.Sc. in Computer Science & Engineering, BUBT (expected Dec 2026)

πŸ† Certifications

AWS Certified Solutions Architect – Associate AWS Certified Cloud Practitioner Odoo 19 Certified Functional


πŸ“š Research & Publications

  1. Analyzing Regional Variations in Bangla Speech: A Voice Classification using MFCCs International Conference on Artificial Intelligence for Sustainable Engineering and Innovation (ICAISEI), 2026 Β· ResearchGate District-level Bangla voice classification (Dhaka vs. Chittagong) from MFCC features, comparing classical ML models.

πŸ› οΈ Tech Stack

Backend

Java Spring Boot Spring Security Python

Cloud & DevOps

AWS Amazon Connect AWS Lambda Docker Nginx Linux OpenSearch

Databases

PostgreSQL MySQL DynamoDB

ML & Automation

TensorFlow Scikit--learn Pandas n8n


πŸš€ Featured Projects

Project Description Stack
Personal Finance Tracker Finance tracking API with JWT auth, email OTP verification, and Flyway migrations, plus an Android client Spring Boot PostgreSQL Docker
url-shortener Bit.ly-style URL shortener with custom slugs, click tracking, and redirection Java Spring Boot PostgreSQL
OLK-Stack OpenSearch, Logstash & Kibana observability stack, containerized Docker OpenSearch Logstash
Spring-Data-Specification Dynamic query building with Spring Data JPA Specifications Java Spring Boot JPA
Pustok-Online-book-shop Android app for buying and reading books, with a separate admin panel Java Android

πŸ“Š GitHub Stats

GitHub Streak


πŸ”— Connect

Happy to talk about Amazon Connect, AWS architecture, backend design, or ML in production.

LinkedIn Email ORCID

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  1. url-shortener url-shortener Public

    Developed a RESTful application to shorten long URLs (similar to Bit.ly) with features like custom slugs, click tracking, and redirection, built using Spring Boot, Spring Data JPA, and PostgreSQL.

    Java

  2. spring-shell-randomjoke spring-shell-randomjoke Public

    Java

  3. OLK-Stack OLK-Stack Public

    Opensearch, Logstash and Opensearch dashboards(Kibana) demo

  4. Attendence_Management Attendence_Management Public

    Java

  5. Spring-Data-Specification Spring-Data-Specification Public

    Java

  6. Pustok-Online-book-shop Pustok-Online-book-shop Public

    An Android app to buy and read books. Has a separate admin app for the owner.

    Java 1