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Bargan Mihai

@barganmihai

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Full-stack engineer (React, Next.js, Node) with 9+ years of experience, now building AI products solo.

Romania

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Full-stack developer with 9+ years of experience, focused on React, Next.js and TypeScript, with Node.js and backend work on top. I like turning messy codebases into clean, scalable ones: at Grid Dynamics I restructured a front-end codebase (Vite, Tailwind component system, Storybook, TanStack, tests with Cypress), and at Backstage I led a monorepo-to-Turborepo migration with domain-based packages.

I'm currently building HAP, a mobile app for hybrid athletes, on my own: React Native, Next.js, Supabase, Vercel and Stripe, with Claude powering the AI coaching. I use Claude and Cursor daily and enjoy making them part of a reliable workflow. I've also led development and support teams earlier in my career.

Based in Europe (EU citizen, moving to Spain in 2027) and looking for a remote role on a product-focused team.

Experience

Work history, roles, and key accomplishments

Current

Founder & Full Stack Developer

Current

HAP - Hybrid Athlete Planner

Apr 2026 - Present (6 months)

Building a mobile app solo that creates dynamic weekly training plans for hybrid athletes, adjusting them based on fatigue and recovery. The stack includes React Native, Next.js, Supabase, Vercel, and Stripe, with Claude powering AI coaching logic.

React Native Next.js TypeScript Supabase Vercel EAS Stripe REST APIs Claude AI Cursor Unit Testing

Front-End React Developer

Grid Dynamics

Nov 2024 - Jun 2026 (1 year 7 months)

Restructured a disorganized front-end codebase into a scalable architecture, migrating build tooling to Vite and rewriting the front-end in Tailwind. Integrated Storybook and TanStack, and collaborated with stakeholders to align business and technical requirements.

React Preact Next.js JavaScript TypeScript Vite Tailwind Storybook TanStack Cypress GraphQL Unit Testing

React Developer

Backstage

Dec 2021 - Aug 2024 (2 years 8 months)

Led migration from a monorepo to Turborepo using Vite, splitting the codebase into domain packages. Built a scalable UI library with React, integrated GraphQL APIs with Apollo Client, and managed WordPress infrastructure on AWS and Heroku deployment.

React Tailwind Stitches TurboRepo GraphQL Apollo AWS Heroku Vite Cypress Storybook Unit Testing

WordPress & React Developer

Best4you International

May 2021 - Dec 2021 (7 months)

Created and maintained WordPress sites using Gutenberg, developed custom themes and blocks with React, and optimized for SEO and performance. Implemented custom APIs and managed NGINX configurations for multiple environments.

WordPress React Gutenberg Elementor Visual Composer SEO Wordfence Sucuri

Technical Support Engineer

Extole

Sep 2019 - Mar 2021 (1 year 6 months)

Implemented client flows, managed customer profiles, and customized UI components within the admin platform. Collaborated with internal teams to address UI issues, created pull requests for new features, and used Kibana for data debugging.

JavaScript HTML SCSS Unit Testing Kibana

Technical Support Team Lead

FloThemes

Aug 2016 - Sep 2019 (3 years 1 month)

Led the technical support team, handling sales inquiries and providing live issue troubleshooting. Responsible for troubleshooting WordPress themes, implementing new features, and optimizing site performance, including plugin development and API integrations.

JavaScript HTML SCSS PHP Laravel jQuery SASS Webpack Figma Sketch

Web Developer & Team Lead

Cherry Digital Agency

Feb 2016 - Jul 2016 (5 months)

As the first recruit, built the project development team and participated in hiring. Led the development and design team, managed WordPress projects, and developed websites from scratch.

JavaScript HTML SCSS WordPress jQuery Figma Sketch

Technical Support Engineer

CosmoThemes

Jan 2015 - Dec 2015 (11 months)

Provided direct client support, troubleshooting website issues and crashes. Assisted customers in implementing custom functionalities, managed order processing, and guided users through hosting setup and site optimizations.

JavaScript HTML SCSS WordPress jQuery