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I'm Mark Emdin, a Frontend Engineer based in Berlin, Germany, with 5+ years of production experience delivering web and mobile applications using React, Next.js and TypeScript. I've built and shipped features for a B2B event platform serving 500,000+ users, focusing on real-time ticketing, payments integration, and end-to-end delivery in a startup environment. I'm a former professional chess player with a 2250 FIDE rating and a background in applied mathematics. I bring a structured, analytical approach to software engineering, emphasizing performance, reliability, and user experience. I also coach chess and enjoy applying disciplined problem solving to development challenges.…I'm Mark Emdin, a Frontend Engineer based in Berlin, Germany, with 5+ years of production experience delivering web and mobile applications using React, Next.js and TypeScript. I've built and shipped features for a B2B event platform serving 500,000+ users, focusing on real-time ticketing, payments integration, and end-to-end delivery in a startup environment. I'm a former professional chess player with a 2250 FIDE rating and a background in applied mathematics. I bring a structured, analytical approach to software engineering, emphasizing performance, reliability, and user experience. I also coach chess and enjoy applying disciplined problem solving to development challenges.

Mark Emdin

Front-End Developer, Full Stack Developer, Web Developer, +2

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I'm Mark Emdin, a Frontend Engineer based in Berlin, Germany, with 5+ years of production experience delivering web and mobile applications using React, Next.js and TypeScript. I've built and shipped features for a B2B event platform serving 500,000+ users, focusing on real-time ticketing, payments integration, and end-to-end delivery in a startup environment. I'm a former professional chess player with a 2250 FIDE rating and a background in applied mathematics. I bring a structured, analytical approach to software engineering, emphasizing performance, reliability, and user experience. I also coach chess and enjoy applying disciplined problem solving to development challenges.…I'm Mark Emdin, a Frontend Engineer based in Berlin, Germany, with 5+ years of production experience delivering web and mobile applications using React, Next.js and TypeScript. I've built and shipped features for a B2B event platform serving 500,000+ users, focusing on real-time ticketing, payments integration, and end-to-end delivery in a startup environment. I'm a former professional chess player with a 2250 FIDE rating and a background in applied mathematics. I bring a structured, analytical approach to software engineering, emphasizing performance, reliability, and user experience. I also coach chess and enjoy applying disciplined problem solving to development challenges.

Available to hire

I’m Mark Emdin, a Frontend Engineer based in Berlin, Germany, with 5+ years of production experience delivering web and mobile applications using React, Next.js and TypeScript. I’ve built and shipped features for a B2B event platform serving 500,000+ users, focusing on real-time ticketing, payments integration, and end-to-end delivery in a startup environment.

I’m a former professional chess player with a 2250 FIDE rating and a background in applied mathematics. I bring a structured, analytical approach to software engineering, emphasizing performance, reliability, and user experience. I also coach chess and enjoy applying disciplined problem solving to development challenges.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Russian

Fluent

French

Intermediate

Hebrew (modern)

Beginner

Work Experience

Frontend Developer at Vibez

January 1, 2023 - Present

Built and shipped production frontends in React / Next.js / TypeScript on web and React Native (Expo) on iOS/Android, serving 500,000+ users. Implemented real-time QR and NFC ticket validation with sub-200ms latency. Integrated Zooz and BridgerPay for cashless/tap-to-pay event experiences. Shipped internationalization across 6 languages with RTL/LTR support. Rolled out Sentry monitoring to reduce frontend errors by ~40%. Improved page performance (LCP from ~4s to ~2s) via caching and data-fetching optimizations. Achieved ~90% frontend test coverage (Jest, RTL). Owned features end-to-end from design hand-off to release and monitoring.

Full Stack Developer at Personal Project - E-Commerce Platform

August 1, 2022 - January 1, 2023

Built frontend components in React and integrated third-party APIs; developed backend services with Node.js/Express and PostgreSQL; deployed on AWS (EC2, RDS); handled end-to-end data flow between frontend and backend.

Professional Chess Player & Coach at Self-employed

January 1, 2018 - January 1, 2022

Maintained 2250 FIDE rating; European champion; trained students with structured learning approaches; performed in international competitions (Maccabiah Games).

Full Stack Developer at Personal Project (E-Commerce Platform)

August 1, 2022 - January 1, 2023

Built a full-stack e-commerce marketplace enabling users to browse products and complete transactions. Implemented frontend components in React, integrated third-party APIs, and developed back-end services with Node.js and Express, using PostgreSQL for data storage. Deployed on AWS (EC2, RDS) and coordinated end-to-end data flow between frontend and backend via REST APIs.

Professional Chess Player & Coach at Independent

January 1, 2018 - January 1, 2022

Competed in European and international tournaments (including Maccabiah Games) and achieved 2250 FIDE rating. Worked as a certified chess coach, delivering structured training programs and mentoring students to develop strategic thinking and performance skills.