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Serhii M. — Senior Frontend Developer from Germany

Serhii M.

Senior Frontend Developer

Germany 6+ years
Open to offersNew to Platform
Languages
EnglishGermanRussianUkrainian
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Portfolios

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About

Serhii M. is a seasoned Senior Fullstack/Product Engineer and Team Lead with over six years of specialized experience in developing React-based applications for responsive web platforms. Based in Altena, Germany, he has helmed projects at TapMy.Store, spearheading the creation of a user-friendly SaaS website-builder employing a Monorepo architecture for enhanced development speed. As the Frontend Developer Team Lead at Tailbook.me, he guided a team of ten developers, focusing on frontend architecture using React and modern frameworks to ensure seamless software integration. His freelancing ventures on platforms like UpWork have seen him craft more than 20 responsive websites while integrating robust SEO practices and code optimization for scalability. With a rich toolkit that includes languages and technologies such as TypeScript, Next.js, REST APIs, Docker, and testing frameworks, Serhii is committed to delivering top-tier, scalable web solutions. He has a Master of Science from Yaroslav the Wise National University and is fluent in Ukrainian, Russian, and English, with ongoing improvements in German.

Experience

  • Senior Full Stack Developer (Part-time)

    https://tapmy.store · 2025 — 2026
    Focused on creating an intuitive website builder for content creators utilizing a Monorepo architecture (Turbo). Developed a visual editor featuring drag-and-drop capabilities (@dnd-kit) and adaptive component systems. Migrated the project from SCSS to CSS Modules with a centralized Design System using CSS Variables, enhancing build performance and efficiency. Integrated payment processing through Stripe and Google Calendar OAuth for booking functionalities, while also establishing global State Management with Zustand to enable real-time page previews. Ensured code reliability through 100% type safety using TypeScript and conducted Unit and Integration tests with Jest.

  • Team Lead Frontend Developer

    https://tailbook.me · 2024 — Present
    Oversaw a team of 10 developers, emphasizing goal alignment and maintaining code quality. Built complex UI components using React alongside modern frameworks while integrating various software subsystems into the web platform. Developed technical documentation and thoroughly analyzed components for improved clarity. Ensured on-time project delivery under tight deadlines, employing technologies like React, TypeScript, REST APIs, and Component Architecture.

  • Full-Stack Developer (Freelance)

    UpWork & Freelancehunt · 2022 — 2024
    Delivered over 20 responsive websites through React and Next.js, transforming design concepts into functional user interfaces. Enhanced website performance by implementing SEO practices and executing code refactoring for improved scalability. Conducted Unit and Integration tests to validate web interface functionality and established connections with various APIs and backend services. Compiled technical documentation for all created components.

  • IT Consultant

    Ukraine · 2019 — 2022
    Provided customized web solutions and consulting services to clients across diverse industries. Leveraged modern CMS platforms, such as WordPress and Contentful, to create effective tailored solutions.

Skills & Expertise

German (Fluent)Blockchain DeveloperFrontend DeveloperFull Stack Developer

Education

  • Master of Science
    Yaroslav the Wise National University · 2008 — 2013