Hey, my name is
Mohammad Hossein Karimi
Full-Stack Developer specializing in Next.js, Node.js and PostgreSQL.
Front-end
TypeScript
React
Next.js
Tailwind CSS
Back-end
Node.js
Express
REST API
GraphQL
Database
MongoDB
PostgreSQL
MySQL
Redis
DevOps
Docker
Git
GitHub Actions
Linux
Cloudflare
Libraries & tools
React Query
Zod
Framer motion
shadcn/ui
Front-End Developer & Platform Maintainer
October 2025 – PresentIranian Chemical Science and Technology Association
Built and launched a production-ready Next.js platform in 2 months, restoring 560 existing users and supporting 60+ new registrations.
Rebuilt the legacy WordPress/PHP platform as a modern Next.js application, achieving Lighthouse scores of 93 (mobile) and 100 (desktop).
Developed a bilingual digital membership-card system with a data re-verification workflow, resolving legacy Persian encoding issues.
Front-End Developer
March 2025 – January 2026Behrank
Built and customized 20+ responsive pages with Elementor, HTML5, and CSS3 across multiple breakpoints.
Customized CSS, page sections, and plugin behavior to overcome Elementor template limitations.
Front-End Developer / Full-Stack Contributor
November 2023 – September 2025Hydrogenous
Migrated a legacy PHP platform to React/Next.js in 6 months, improving maintainability, deployment, and UX.
Built a production e-commerce/admin platform with 4 role-based dashboards, JWT auth, PostgreSQL, and Docker deployment.
Rebuilt the purchase and address workflow, improving ordering reliability for nearly 100 early users.
IranCSTA Platform
IranCSTA is the official digital platform of the Iranian Chemical Science and Technology Association. I redeveloped the platform with a modern Next.js interface and maintained key membership-related workflows for academic users.
Problem
The previous WordPress/PHP-based website had been inaccessible for more than a year, leaving existing members unable to properly access services and making the platform difficult to maintain or extend.
Solution
I delivered the initial production version of the new Next.js platform, restored access for existing users, supported new registrations, and built a bilingual digital membership-card workflow that allows users to view and download Persian and English membership cards.
PrivateKernel Platform
PrivateKernel is an AI-assisted blogging and content-management platform built to support structured content creation, publishing workflows, authentication, and platform administration through a modern Next.js-based system.
Problem
Managing AI-generated content at scale required more than a simple blog interface. The platform needed structured publishing workflows, admin controls, reusable UI components, database integration, and an SEO-aware content delivery structure.
Solution
I developed the front-end dashboard and publishing workflow using Next.js, React.js, Tailwind CSS, shadcn/ui, PostgreSQL, JWT, and custom backend endpoints. The platform supported authentication, admin workflows, content management, and publishing for more than 110 AI-generated posts.
Hydrogenous Platform
Hydrogenous is a production e-commerce and admin platform for a hydrogen-enriched beverage startup. I migrated the system from a legacy PHP-based platform to a modern React/Next.js application, improving maintainability, deployment workflow, and user experience.
Problem
The previous PHP-based platform had an outdated structure, limited maintainability, address-loading issues, and an inefficient purchase workflow that affected ordering reliability.
Solution
I rebuilt the platform with Next.js, PostgreSQL, JWT authentication, Zustand, Tailwind CSS, and Docker-based deployment. The new system included role-based dashboards, improved purchase and customer-address workflows, and a cleaner foundation for future product and admin features.
Available for full-time, part-time, hybrid, and freelance collaborations