S M Mahmudul Hasan

Builder · Logic51 LLC · Triage @ Express.js

Building reliable smart systems, developer experiences and business automations

About

Son, Husband and a Friend

Before anything else, I’m a son, a husband, and a friend. These are the roles that mean the most to me, even if I don’t always get everything right.

I’m someone who’s still figuring things out, learning as I go, and trying to become a little better than I was yesterday. I care about the people around me, the promises I make, and the kind of person I become along the way. I believe being there for someone matters more than having the perfect words to say.

Professionally, I’m a software engineer who enjoys building things, solving problems, and understanding how things work. Over the years, I’ve found myself moving beyond writing code into making product decisions, leading teams, and figuring out how to turn ideas into something useful. Lately, I’ve been spending a lot of time exploring AI and building products of my own. There’s something deeply satisfying about starting with an idea and slowly bringing it to life.

At the end of the day, I hope I build good things, do right by the people I love, and leave a little good behind wherever life takes me.

Founder
Logic51 LLC
Creator
Jogan Cloud
Builder
SaaS & AI-powered products
Focus
AI, System Design, Software Engineering
Background
Engineering Leadership & Product Development
Community
Express.js Member
Interests
Open Source, Developer Tools, AI Agents
Belief
Build useful things. Keep learning. Stay human.

Experience

Work Experience

Technical Lead

Agency Handy · Remote

2025-04 — 2026-09

Led the technical team and contributed across engineering, product, analytics, user experience, and customer support while building and operating a SaaS product.

  • Led the technical team and worked closely with product and management
  • Balanced technical decisions with customer and business priorities
  • Built deeper expertise in SaaS operations, product analytics, and customer feedback

Tools: Technical Leadership · SaaS · Product Engineering

Software Engineer

ZAAG SYSTEMS · Dhaka, Bangladesh

2022-03 — 2024-12

Built scalable systems and led delivery across identity, eCommerce, inventory, and multi-vendor products.

  • Led development of a scalable queue-based ID generation system
  • Built single and multi-location inventory and multi-vendor eCommerce systems
  • Created reusable Node.js backend templates and fine-grained AWS IAM policies
  • Managed project teams and delivered high-priority work

Tools: Node.js · AWS · eCommerce

Freelance Consultant

Wabble Web · Remote

2022-02 — 2022-02

Built a client portal for monitoring CDN usage statistics.

  • Created a portal for clients to log in and monitor CDN usage

Tools: Consulting · Web Development

Freelance Consultant

Multipurpose Engineering & Industrial Automation (MEIA) · Gazipur, Bangladesh

2022-01 — 2022-01

Created a certificate management portal for issuing, managing, and verifying student certificates.

  • Built certificate management workflows
  • Enabled third parties to verify certificates issued to students

Tools: Consulting · Portal Development

Back-end Developer

Zonash · Remote

2020-12 — 2021-12

Developed and operated backend services with Express, MongoDB, JWT authentication, automated workflows, and API documentation.

  • Created APIs with Express and handled database operations with MongoDB
  • Built API authentication with JWT and wrote unit and integration tests with Jest
  • Automated workflows with GitHub Actions and managed Ubuntu servers
  • Maintained API documentation, linting, and formatting

Tools: Node.js · MongoDB · Jest

Community

Open Source

Express.js

Member

View project

Contributing to the Express.js ecosystem and community efforts.

  • Community support
  • Issue triage
  • Documentation improvements

Focus: Node.js · Express · Open Source

Consultancy

Consultancy

Over the years, I have built RAG, MCP, SaaS products, multi-location-vendor ecommerce, A/B testing platforms, and developmed internal tools for companies to make their work easier. You can talk to me about system reviews, business automation, product ideas, and the next useful step. This is a consultation only, not implementation work.

Format
One focused 30-minute discussion
Booking fee
3 USD for the conversation, not implementation
Timezone
Asia/Dhaka
Choose a time

After payment, the meeting invitation is sent manually by email.

Support

Tipping

If my writing or work helped you, feel free to buy me a coffee.

A small contribution helps keep useful writing, experiments, and open-source work moving.

Choose an amount

The default is $5. You can change it below.

You will pay $5.00 securely with Stripe.