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Black and white portrait of Zahid Hasan Mozumder, senior full stack software engineer, standing with arms folded

Zahid Hasan Mozumder — Software Engineer

Crafting digital experiences through elegant code.

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01. Profile — about Zahid Hasan Mozumder

I believe software should be as evocative as a great film.

Focused on exploring how each system works together and connecting the dots.

Strengths

Architecting resilient distributed systems and cloud-native infrastructures that prioritize high availability, fault tolerance, and low-latency data flow at scale.

Tech Stack

  • React | NextJS
  • JavaScript | TypeScript
  • Node.js | Express.js | NestJS
  • AI | LLM
  • DevOps | Cloud

Vision

Want to create a life so creative that people will remember my name for centuries after I’m gone. Also, want to travel the world, chase adventure, live freely, party hard, and enjoy a chill and happy life full of endless thrills and unforgettable moments.

02. Works — selected software projects

Curated Projects 2024-26

Comicing Studio — Crafting Real Character & Stories into Comics, screen 1
Comicing Studio — Crafting Real Character & Stories into Comics, screen 2
Comicing Studio — Crafting Real Character & Stories into Comics, screen 3
Comicing Studio — Crafting Real Character & Stories into Comics, screen 4
Comicing Studio — Crafting Real Character & Stories into Comics, screen 5

Comicing Studio

Crafting Real Character & Stories into Comics

An AI-powered comic generation platform that collects real character, stories, memories, or imagination from the user to craft comics.

  • Generates high-quality comics, storyboards, and AI illustrations from simple text prompts
  • Automated workflow combining script generation, AI art creation, and layout processing
  • Integrated photo-to-image engine for consistent character and asset generation
  • Supports professional publishing workflows with print-ready PDF outputs
  • Integrated payment gateway for secure fund collection
  • Next.js
  • NestJS
  • OpenAI
  • TypeScript
  • PostgreSQL
Read full case study
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 1
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 2
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 3
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 4
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 5
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 6
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 7
Buzfi V2 | Selaqi — E-Commerce for Customers, Dropshippers & Sellers, screen 8

Buzfi V2 | Selaqi

E-Commerce for Customers, Dropshippers & Sellers

Platform designed to connect customers, sellers, and dropshippers within a unified digital marketplace. It streamlines product management, order processing, vendor onboarding, and commission-based selling.

  • Multi-vendor marketplace with dedicated seller and dropshipper management
  • Centralized product catalog, inventory, and order management system
  • Vendor onboarding and commission-based selling workflow
  • Integrated payment processing and streamlined order fulfillment operations
  • Support for dropshipping operations with automated workflow handling
  • Customer engagement features with simplified buying and selling experience
  • Next.js
  • NestJS
  • PostgreSQL
  • Microservices
  • Stripe
Read full case study
Portfolio — Personal branding and project showcase platform, screen 1
Portfolio — Personal branding and project showcase platform, screen 2
Portfolio — Personal branding and project showcase platform, screen 3
Portfolio — Personal branding and project showcase platform, screen 4

Portfolio

Personal branding and project showcase platform

A modern personal portfolio website built to present my skills, projects, and professional journey in a clear, structured, and visually engaging way.

  • Clean and responsive user interface
  • Project-focused case study presentation
  • Dedicated sections for skills, experience, and achievements
  • Designed to strengthen personal branding and online presence
  • Built for continuous updates and long-term professional use
  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • MongoDB
Read full case study
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 1
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 2
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 3
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 4
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 5
MedWorkforce — A healthcare automation and clinic ERP platform website, screen 6

MedWorkforce

A healthcare automation and clinic ERP platform website

A modern product website built to present an AI-powered healthcare platform that helps clinics streamline patient management, appointments, billing, EMR workflows, reporting, and operational efficiency

  • Product-focused SaaS website for a healthcare automation platform
  • Clear messaging around clinic operations, EMR, billing, and analytics
  • Structured sections for trust, product features, positioning, and CTA flow
  • Designed to support brand credibility and demo conversion
  • Built around a modern healthcare-tech visual style and business
  • NestJS
  • OCR
  • HealthTech
  • HIPAA
  • RAG
  • LangChain
Read full case study
Pengine — A print-on-demand production platform, screen 1
Pengine — A print-on-demand production platform, screen 2
Pengine — A print-on-demand production platform, screen 3

Pengine

A print-on-demand production platform

A production-grade print-on-demand system built to handle real orders, real files, and real operational complexity.

  • Multi-tenant SaaS architecture
  • Automated order, artwork, and fulfillment workflows
  • High-volume mockup generation and asset handling
  • Built and operated by Genesys
  • Actively evolving in production
  • NestJS
  • Shopify
  • AWS EC2
  • AWS S3
  • Docker
  • Multi-tenant SaaS
Read full case study
Buzfi — Multi-Vendor E-Commerce Platform, screen 1
Buzfi — Multi-Vendor E-Commerce Platform, screen 2
Buzfi — Multi-Vendor E-Commerce Platform, screen 3

Buzfi

Multi-Vendor E-Commerce Platform

A scalable system for marketplace operations. A multi-vendor e-commerce platform built to support multiple sellers, dropshippers, customers, product management, order processing, and secure marketplace operations in a single system.

  • Multi-vendor architecture with vendor-specific management
  • Product, order, and customer workflow handling
  • Secure authentication and role-based access control
  • Secure payment processing and order fulfillment
  • Built to support real business operations and future expansion
  • Next.js
  • NestJS
  • MongoDB
  • RBAC
  • Payments
Read full case study
BoostUGC — A video-based review and content collection system, screen 1
BoostUGC — A video-based review and content collection system, screen 2
BoostUGC — A video-based review and content collection system, screen 3
BoostUGC — A video-based review and content collection system, screen 4
BoostUGC — A video-based review and content collection system, screen 5
BoostUGC — A video-based review and content collection system, screen 6

BoostUGC

A video-based review and content collection system

A platform that helps brands collect, manage, and reuse authentic customer video testimonials.

  • Secure video upload and media handling
  • Brand-level isolation and access control
  • Moderation and content management workflows
  • Built and operated by Genesys
  • Actively evolving in production
  • NestJS
  • AWS S3
  • MongoDB
  • Video Processing
Read full case study

03. Journey — work experience

Sr. Full Stack Developer @ Get Levrg

Optimized HubSpot-based lead conversion workflows, improving landing-page conversion rates by 20% and generating 150+ qualified leads through 6+ landing pages. Implemented Google Tag Manager with 15+ conversion events, achieving 90%+ lead-source attribution through CRM and analytics integrations. Improved WordPress website performance by 30%, enhancing SEO and user experience, while reducing manual lead-management effort by 35% through workflow automation.

  • SEO & GEO
  • WordPress
  • Agentic Development
  • Python
  • JavaScript & TypeScript

Software Engineer II @ Buzfi LLC

Driving the development of HIPAA-aligned HealthTech and SaaS backend systems, architecting secure APIs and scalable microservices with NestJS, PostgreSQL, MongoDB, and gRPC. Orchestrating real-time request lifecycles, asynchronous workflows, and resilient infrastructure with RabbitMQ, Kafka, Docker, Nginx, and SSL, while collaborating closely with clients and stakeholders to deliver reliable, high-uptime platforms on schedule.

  • NextJS
  • NestJS
  • Microservices
  • OpenAI

Software Engineer @ Genesys Softwares LLC

Built high-performance backend systems with NestJS, architected RESTful and GraphQL APIs that improved response latency by 35%, and designed hybrid data layers with PostgreSQL, Prisma, and MongoDB for efficient storage and retrieval. Integrated platforms such as Shopify, Stripe, NetSuite, Routific, and Amazon SP-API to automate 80% of workflows, strengthened production reliability through Cypress-based E2E and API testing, accelerated media delivery with AWS S3, and maintained scalable deployments with Docker, GitHub Actions, AWS EC2, Route 53, and Nginx for high availability.

  • NextJS
  • NestJS
  • Docker
  • AWS

Software Engineer Intern @ Battery Low Interactive Ltd.

Developed full-stack web applications with a strong focus on backend systems using NestJS, PostgreSQL, and Prisma ORM, while implementing secure JWT and RBAC authentication to prevent unauthorized access. Built modular and maintainable React components with Redux and integrated React Router DOM to enable seamless client-side navigation and improved user experience. Optimized database queries, indexing, and caching strategies to significantly reduce server load and enhance API response times. Collaborated closely with designers, QA engineers, and product managers in Agile workflows to deliver scalable, production-ready features efficiently.

  • React
  • TypeScript
  • NestJS

Data Annotator @ Scale AI

Annotated and reviewed diverse datasets including images, text, audio, and video to support machine learning model training and evaluation. Followed detailed annotation guidelines and labeling taxonomies to ensure high-quality, consistent, and accurate annotations. Performed quality checks and resolved edge cases to maintain dataset integrity. Collaborated with project leads to understand requirements, provide feedback, and improve annotation processes. Managed large volumes of tasks efficiently while meeting strict accuracy and turnaround time targets.

  • Data Annotation
  • Machine Learning
  • Quality Assurance

04. Answers — frequently asked questions

Who is Zahid Hasan Mozumder?

Zahid Hasan Mozumder is a senior full stack software engineer based in Bangladesh who builds scalable web platforms, AI-powered products, and cloud-native backend systems. He currently works as a Senior Full Stack Developer at Get Levrg and has previously engineered marketplace, healthcare, and SaaS platforms at Buzfi LLC and Genesys Softwares LLC.

What technologies does Zahid work with?

His core stack is TypeScript and JavaScript across React and Next.js on the frontend, and Node.js with NestJS and Express.js on the backend. He designs data layers with PostgreSQL, MongoDB, and Prisma, builds distributed systems with REST, GraphQL, gRPC, RabbitMQ, and Kafka, and ships them with Docker, GitHub Actions, Nginx, and AWS. He also builds LLM-powered application features.

What kind of projects has Zahid built?

He has built Comicing Studio, an AI comic generation platform; Buzfi and Buzfi V2 (Selaqi), multi-vendor e-commerce marketplaces supporting sellers and dropshippers; MedWorkforce, a healthcare automation and clinic ERP platform; Pengine, a multi-tenant print-on-demand production system; and BoostUGC, a video testimonial collection platform for brands.

Is Zahid available for freelance or contract work?

Yes. He takes on selected full stack engineering, backend architecture, and AI integration engagements. The fastest way to reach him is by email at [email protected], or through LinkedIn and GitHub.

What is Zahid's engineering focus?

He focuses on architecting resilient distributed systems and cloud-native infrastructure that prioritise high availability, fault tolerance, and low-latency data flow at scale, while keeping the product experience fast and considered end to end.

Fragments of Memory

An Archival Composition

Zahid Hasan Mozumder with his university team in front of the 2022 ICPC Asia Dhaka Regional Contest banner at Green University of BangladeshZahid Hasan Mozumder pointing at the champion prize board of the Green University Department Programming Contest, Spring 2023Tandem paragliding flight over the green hills and valley of Pokhara, NepalZahid Hasan Mozumder on a red motorcycle on a forest road in the Nepalese hillsBungee jump above a river, photographed from the jump platform at The Cliff, NepalZahid Hasan Mozumder in full riding gear and a carbon helmet, mounted on a motorcycle before a rideZahid Hasan Mozumder standing with arms outstretched on a ridge above a snow-streaked mountain valleyZahid Hasan Mozumder looking up at a tall waterfall falling down a sheer rock cliff faceZahid Hasan Mozumder in a rain jacket watching a distant storm roll across forested hills
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