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  1. Freelancers

Serhii Lytvynenko

Offer Serhii work on your next project.

Ukraine Chernigov, Ukraine
2 months 25 days back
Available for hire available for hire
on the service 2 months 26 days
Freelancer Serhii L. — Ukraine, Chernigov. Core skill — Web Programming, System & Network Administration

Rating

Successful projects
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Average rating
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Rating
216
Web Programming 1
2741 place out of 6423
System & Network Administration
155 place out of 588

Language proficiency level

Русский Русский: advanced
Українська Українська: upper-intermediate
English English: pre-intermediate

Skills and abilities

Programming

Design & art

Services


Photo, Audio & Video

Architecture

Administration


Writing

Portfolio


  • LISTENER

    PHP
    LISTENER — example of freelancer's portfolio work in category PHP
    Status: Active service store.

    Technologies: OpenCart, PHP, Twig, native JavaScript, Bootstrap5, CSS3

    … Feature: OpenCart (customization), JSON-LD microdata for local SEO (Chernihiv), responsive layout.

  • Qboard

    Web Programming
    Qboard — example of freelancer's portfolio work in category Web Programming
    Status: Corporate portal.

    Technologies: Pure PHP, MySQL, native JavaScript, Bootstrap5, CSS3.

    … Feature: Focus on security and performance, responsive layout. Implemented hidden entry points to the admin panel, server-level authorization, and protection of system files. The project demonstrates lightweight and fast solutions without unnecessary heavy frameworks. A custom game engine for chess and checkers has been separately implemented in native JavaScript — showcasing logic and high performance of the code without external libraries.