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Oleksii K.

Middle Front-End Developer

1 year of experience

Ukraine 🇺🇦
English (B1)

Short bio

Front-end developer with 10+ years of experience in HTML, CSS, JavaScript, and TypeScript, delivering responsive, cross-browser compatible web and mobile solutions. Experienced in FinTech, healthcare, and international projects, with strong skills in UI/UX, performance optimization, and team collaboration. Passionate about clean code, scalable interfaces, and mentoring junior developers.

Tech stack

Main technologies
HTMLCSSJavaScriptjQueryTypeScriptPHPSQLCypressXMLXPathlikeBootstraporFoundationpreprocessorsSassLessGit or SVNWebpackGrunt or Gulp
Roles
Front-EndBack-End

Work experience

  • HTML/CSS DeveloperJune 2021 – April 20232 y.

    Worked on a multi-tier platform for clinical trials that included a web-based client application for configuration and administration, as well as desktop (Windows) and mobile (Android) applications. Focused on building responsive, cross-browser compatible interfaces and supporting complex UI flows for data-driven healthcare solutions.

    Responsibilities:
    • Developed responsive UI components for the client configuration and administration platform.
    • Ensured cross-browser compatibility and adherence to responsive design principles across web interfaces.
    • Collaborated with cross-functional teams to support integration with desktop and mobile applications.
    • Optimized layouts and styles for performance, accessibility, and usability in a data-intensive environment.
    • Maintained and improved existing front-end codebase, ensuring clean structure and scalability.
    • Participated in UI testing and validation to ensure stable and consistent user experience.
  • Frontend Basic Course TeacherSeptember 2021 – April 20227 m.

    Delivered foundational frontend education focused on HTML and CSS, teaching two student groups and guiding them through core web development concepts, layout techniques, and responsive design practices.

    Responsibilities:
    • Prepared and delivered structured lessons based on the provided curriculum.
    • Taught HTML, CSS, and basic responsive design principles.
    • Reviewed, graded, and provided detailed feedback on student assignments and homework.
    • Assisted students in understanding UI fundamentals and best coding practices.
    • Mentored beginner developers and supported their learning progress.
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