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Mahmudul Hassan

Mahmudul Hassan

Software Engineer

Dhaka, BD
+8801630811624

Background


About

About

Results-driven Software Engineer with over 5 years of professional experience building and scaling backend systems for fintech, e-commerce, and SaaS platforms. Skilled in Python, FastAPI, Django, AWS, and distributed architectures. Adept at designing clean, maintainable solutions, modernizing legacy systems, and leading small technical teams to deliver reliable, high-performance applications. Passionate about system design, automation, and data-driven engineering.

Work Experience

Work Experience

  • Software EngineerGold Kinen Technology

    Dec, 2022 - Present

    Modernized Bangladesh’s first certified gold trading platform by migrating a legacy Oracle system to FastAPI + PostgreSQL architecture.

    • Modernized Bangladesh’s first certified gold trading platform by migrating a legacy Oracle system to a scalable FastAPI + PostgreSQL architecture.

    • Designed and implemented high-performance REST APIs, event-driven workflows using AWS (Lambda, SQS, EventBridge), and background job pipelines using Celery.

    • Applied Redis for caching, distributed locking, and rate limiting to ensure high availability and performance.

    • Built automated data migration pipelines ensuring smooth Oracle to PostgreSQL transition with zero data loss.

    • Implemented centralized logging and observability using MongoDB to streamline monitoring and debugging.

    • Developed comprehensive testing frameworks (unit and integration) with Pytest to enhance reliability and CI/CD efficiency.

    • Led a cross-functional engineering team, responsible for technical direction, requirement gathering, sprint planning, and communication with management to ensure timely and high-quality delivery.

  • Software EngineerArbree Solutions

    Oct, 2021 - Nov, 20221 year 1 month

    Developed and maintained microservice-based architectures for OTA management, CRM, and e-commerce systems using Django and FastAPI.

    • Developed and maintained microservice-based architectures for OTA management, CRM, and e-commerce systems using Django and FastAPI.

    • Implemented asynchronous background processing with Celery and Redis for notification and billing systems.

    • Integrated multiple payment gateways including Bkash, Nagad, Stripe, and PayPal.

    • Designed scalable REST APIs and optimized SQL queries for improved performance and reliability.

  • Software EngineerHeavy Task LLC

    May, 2021 - Sep, 20214 months

    Developed and optimized backend APIs and infrastructure automation for enterprise SaaS products.

    • Developed and optimized backend APIs and infrastructure automation for enterprise SaaS products.

    • Worked with AWS cloud stack and Dockerized applications to improve deployment consistency.

    • Collaborated closely with international teams to ensure delivery across time zones in agile environments.

  • Software EngineerSoftware Global Consultancy

    Mar, 2020 - Apr, 20211 year 1 month

    Developed RESTful APIs for government and private organizations including online admission, training, and employee management systems.

    • Developed RESTful APIs for government and private organizations including online admission, training, and employee management systems.

    • Worked with Django, PostgreSQL, and Docker to deploy production-ready solutions.

    • Supported frontend and DevOps workflows, ensuring complete delivery lifecycle coverage.

Projects Experience

Projects Experience

  • FastApi Tenant

    Jan, 2023 - Present

    FastAPI Tenant — A multi-tenant FastAPI framework with middleware-based tenant detection, schema-scoped SQLAlchemy sessions, and Alembic migrations for shared and tenant databases — built for scalable SaaS applications.

  • InsightPro

    Jan, 2022 - Present

    Migrated a legacy Node.js (LoopBack v3) + MongoDB system to FastAPI + PostgreSQL. Implemented caching, async workflows, and automated migration ensuring zero downtime and full data integrity.

  • Instant Job Hub LMS

    Jan, 2021 - Present

    Led backend team of 5 developers to design and build a scalable Learning Management System for online courses and exams using Django REST Framework and Redis caching.

  • Secret Sauce

    Jun, 2021 - Present

    Developed backend for a campaign management and influencer marketing platform integrating Instagram and TikTok APIs for analytics and engagement tracking.

  • Stayverz

    Sep, 2020 - Present

    Built a short-term rental booking system with real-time chat using Django, FastAPI, WebSockets, MongoDB, and Redis.

Skills

Skills

  • Programming Languages

    Python

    JavaScript

  • Frameworks & Libraries

    FastAPI

    Django

    Django REST Framework

    Celery

    BeautifulSoup

    Scrapy

  • Databases & Caching

    PostgreSQL

    MySQL

    MongoDB

    Redis

  • Cloud & DevOps

    AWS (Lambda, S3, SQS, EventBridge, Cognito)

    Docker

    Nginx

    Gunicorn

    CI/CD

    Linux

  • Third-Party Integrations & APIs

    Payment Gateways

    QuickBooks

    Google API

    Facebook API

    Instagram API

    TikTok API

  • Core Competencies

    System Design

    OOP

    Algorithms

    Data Structures

    Team Leadership

    Agile Development

Education

Education

  • Computer Science and Engineering, B.Sc., Daffodil International University

    Jan, 2015 - Jan, 2019

    Graduated with distinction (CGPA 3.98/4.00)

    Focused on software engineering, data structures, algorithms, and distributed systems

Interests

Interests

  • Technology & Programming

    Software EngineeringSystem DesignAutomationOpen Source