Kamrul Hasan Bhuiyan — self-taught, polyglot engineer with 6+ years building web apps,
browser extensions, and Google Workspace automations for clients across the US, UK, UAE,
and Spain.
6+ years of experience590+ freelance orders5.0★ Upwork ratingClients in US · UK · UAE · ES
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Solo freelance practice on Fiverr (590+ orders, 4.9★) spanning web apps, browser automations, Google Workspace integrations, and AI tooling
Migrated a 13-form Google Apps Script awards-submission system to a custom Cloudflare-hosted web app with PDF generation, folder organization, and email automation
Built a GitHub Actions + CLASP CI/CD pipeline for automated Apps Script deployment
Google Apps ScriptCloudflare WorkersCI/CDPDF AutomationEmail Automation
Full-Stack Software Engineer
CyberProtection Services
May 2023 – Sep 2024Maryland, USA (Remote)
Built and maintained full-stack features for a US-based security client
Developed across front-end frameworks and backend services
Collaborated with an international remote team
Full-stackFrontendBackendRemote Development
Full-Stack Software Engineer
Micole
May 2023 – Sep 2023Madrid, Spain (Remote)
Delivered full-stack development for a Spain-based product team
Contributed across the product development lifecycle in a remote-first environment
Full-stackProduct DevelopmentRemote Work
Junior Back-End Engineer
Leaping Logic
Jan 2023 – Mar 2023Dhaka, Bangladesh
Contributed backend development on internal systems and client-facing services
BackendAPI DevelopmentDatabase
Software Engineer II
Tappware Solutions Ltd.
Aug 2020 – Dec 2022Dhaka, Bangladesh
Full-stack development across Accounting ERP and management systems
Worked with Vue.js, React, Ant Design, jQuery, CakePHP, Laravel, and .NET
Vue.jsReactCakePHPLaravel.NETERP Systems
Selected builds
ABBBAs Awards System Migration
GAS · Cloudflare · PDF automation
Migrated a 13-form Apps Script submission system to a custom web app with automated PDF generation, folder organization, and email workflows.
Restaurant Management System
CakePHP · jQuery · Axios
Menu, ordering, and advanced payment flows, including a token-based bill payment system.
Job Portal Web Application
Laravel · MySQL · Tailwind
End-to-end recruitment flow — job posting, search, shortlisting, and rating.