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Hi! I'm Samyar Koei, a frontend-focused Full-Stack Developer with over 4 years of experience building high-performance web applications using React, Next.js, and TypeScript. I specialize in the modern JavaScript ecosystem and am passionate about developer experience, user experience, and scalable design systems. I enjoy working collaboratively with backend, frontend, and UI/UX teams to create clean, efficient, and user-friendly applications. I am also experienced in setting up CI/CD pipelines and working with blockchain technologies on the TON network.…Hi! I'm Samyar Koei, a frontend-focused Full-Stack Developer with over 4 years of experience building high-performance web applications using React, Next.js, and TypeScript. I specialize in the modern JavaScript ecosystem and am passionate about developer experience, user experience, and scalable design systems. I enjoy working collaboratively with backend, frontend, and UI/UX teams to create clean, efficient, and user-friendly applications. I am also experienced in setting up CI/CD pipelines and working with blockchain technologies on the TON network.

Samyarkd

Full Stack Developer, Web Developer, Developer, +3

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Hi! I'm Samyar Koei, a frontend-focused Full-Stack Developer with over 4 years of experience building high-performance web applications using React, Next.js, and TypeScript. I specialize in the modern JavaScript ecosystem and am passionate about developer experience, user experience, and scalable design systems. I enjoy working collaboratively with backend, frontend, and UI/UX teams to create clean, efficient, and user-friendly applications. I am also experienced in setting up CI/CD pipelines and working with blockchain technologies on the TON network.…Hi! I'm Samyar Koei, a frontend-focused Full-Stack Developer with over 4 years of experience building high-performance web applications using React, Next.js, and TypeScript. I specialize in the modern JavaScript ecosystem and am passionate about developer experience, user experience, and scalable design systems. I enjoy working collaboratively with backend, frontend, and UI/UX teams to create clean, efficient, and user-friendly applications. I am also experienced in setting up CI/CD pipelines and working with blockchain technologies on the TON network.

Available to hire

Hi! I’m Samyar Koei, a frontend-focused Full-Stack Developer with over 4 years of experience building high-performance web applications using React, Next.js, and TypeScript. I specialize in the modern JavaScript ecosystem and am passionate about developer experience, user experience, and scalable design systems.

I enjoy working collaboratively with backend, frontend, and UI/UX teams to create clean, efficient, and user-friendly applications. I am also experienced in setting up CI/CD pipelines and working with blockchain technologies on the TON network.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Kurdish

Fluent

Persian

Fluent

German

Beginner

Work Experience

Full Stack Developer at ONTON Team (Remote) Finland (Remote from Iran, Pomegroup)

March 1, 2024 - Present

Revamped TRPC client authentication by integrating middleware, reducing code by hundreds of lines and decreasing bugs significantly. Optimized API calls by changing data fetching intervals to user-event-based revalidation, reducing 4xx errors by 80%. Refactored an old codebase involving Go, Python, and TypeScript using Next.js. Set up new projects for optimized codebases with fast development and CI/CD pipelines. Collaborated with DevOps engineer on CI/CD setup. Supported Backend, Frontend, and UI/UX teams in line with project plans. Integrated native Telegram Mini-App APIs and improved user experience by refactoring legacy code using community feedback and designer collaboration.

Full Stack Developer at Challenquiz Finland (Remote from Iran, Pomegroup)

March 1, 2024 - July 31, 2025

Collaborated on UI/UX decisions with designers. Set up unit and integration tests with Jest. Established frontend codebase quality through linting and formatting. Implemented CI/CD via GitHub Actions to deploy frontend on Ubuntu server in preview mode for PRs. Enabled real-time quiz updates using socketIo and developed Telegram Web Application. Managed development and production servers, database migrations with Prisma and MySQL. Improved user experience by 60% through redesign, increasing conversion rates. Engaged in blockchain development on TON blockchain and NFT minting. Managed Nginx configurations for quiz and socket apps.

Frontend Engineer at Pomegroup Iran (Remote, Pomegroup)

March 1, 2023 - July 31, 2025

Restructured codebase migrating React.js to Next.js and created role-based dashboards. Contributed to API design, developer experience, and user experience. Established frontend codebase standards including linting and formatting. Reviewed code and implemented a contract editor with commenting features. Built and maintained a custom admin portal. Configured Nginx for website routing to WordPress blog. Participated in hiring and onboarding. Implemented interactive MapBox.js-based map for solar panel cost estimations. Advocated and succeeded in migrating MVP from JavaScript to TypeScript. Participated in UI/UX decisions and continually learned modern frontend technologies.

Full Stack Developer at ONTON Team

March 1, 2024 - Present

Revamped non-standard TRPC client authentication by integrating middleware, reducing code significantly and decreasing bugs. Optimized API calls by implementing user-event-based revalidation, reducing 4xx errors by 80%. Refactored legacy codebase involving Go, Python, and TypeScript with Next.js framework. Set up new projects for clean and optimized codebase enabling fast development and CI/CD pipelines. Collaborated with DevOps engineers for efficient CI/CD practices. Assisted Backend, Frontend, and UI/UX teams to follow plans. Integrated Telegram Mini-App APIs natively. Refactored legacy code and improved user experience by incorporating community feedback and designer insights.

Full Stack Developer at Challenquiz

March 1, 2024 - July 31, 2025

Participated in UI/UX decisions with the design team. Set up and wrote unit and integration tests using Jest. Implemented linting and formatting on the Frontend codebase. Established CI/CD pipelines using GitHub Actions to deploy frontend code on Ubuntu servers in preview mode for pull requests. Developed real-time user updates using socketIo for quiz matches and question updates. Developed a Telegram Web Application. Managed development and production servers and database migrations with Prisma and MySQL. Redesigned user experience to improve conversion rates by 60%. Worked on blockchain development on TON network via Node.js SDK including minting soulbond NFTs. Managed Nginx configurations for quiz and socket applications.

Frontend Engineer at Pomegroup

March 1, 2023 - July 31, 2025

Restructured codebase and migrated from React.js to Next.js. Developed role-based dashboards. Contributed to API specifications, developer experience, and user experience enhancements. Set up frontend codebase with linting and formatting. Reviewed code of team developers. Implemented a contract editor with commenting features. Built and maintained a custom admin portal. Created an Nginx config to redirect users to a WordPress blog. Participated in hiring and onboarding processes. Developed interactive maps using MapBox.js to estimate solar panel costs. Authored documentation and advocated for migration from JavaScript to TypeScript for improved type safety. Participated in UI/UX decisions and expanded skills in React, TypeScript, and TailwindCSS.