Open to opportunities

Samyar Koei

@samyarkoei

Message

Senior Frontend developer focused on end-to-end TypeScript safety and AI integration.

Iran

Message

What I'm looking for

I'm seeking a senior frontend role where I can apply end-to-end TypeScript safety, integrate AI to boost productivity, craft pixel-perfect UIs with design teams, and work on modern web3/Next.js products—preferably remote or hybrid.

I am a Senior Frontend developer who prioritizes end-to-end type safety and pixel-perfect implementations. I focus on building reliable user experiences and integrating AI to optimize developer productivity and product workflows.

At recent roles I made data flows type-safe with TypeScript, integrated middleware to stabilize tRPC authentication, and improved UX by monitoring issues with Sentry and collaborating with design. I’ve implemented web3 payment processing, NFT/SBT workflows, and Mapbox-based mapping tools for real projects.

I have led frontend development across Next.js and React projects, migrated codebases from JavaScript to TypeScript, handled deployments and containerization with Docker, and routinely work with modern stacks like Zod, Drizzle, Zustand, and Metabase to deliver scalable, maintainable web applications.

Experience

Work history, roles, and key accomplishments

Senior Frontend Developer

Onton

Jan 2024 - Jan 2025 (1 year)

Implemented end-to-end type-safe data flow using TypeScript and Zod and redesigned the tRPC client authentication middleware to significantly reduce bugs. Integrated web3 wallet payment processing and drove Sentry-informed UX improvements with the design team.

TypeScript Next.js tRPC Zod Zustand Web3 Sentry Metabase

Frontend Developer

PomeGroup

Jan 2022 - Jan 2024 (2 years)

Led frontend development using TypeScript and React/Next.js, built a Mapbox-based rooftop solar area calculator that improved installation accuracy, and managed deployments with Docker and logging to increase reliability. Delivered optimized landing pages with cross-browser compatibility to enhance UX.

TypeScript React Next.js Mapbox Docker CI CD HTML CSS Logging

Junior Frontend Developer

Tafarda

Jan 2021 - Jan 2022 (1 year)

Migrated a JavaScript codebase to TypeScript to improve maintainability and developed a cross-browser shareholder portal for tracking shares and financial milestones. Performed unit testing and troubleshooting to ensure application stability and performance.