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Serhii Onopriienko

@serhiionopriienko

Frontend Engineer at Gambling Solutions who built a landing page constructor that cut developer involvement by 90%.

Romania
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At Gambling Solutions, I built a React drag-and-drop landing page constructor with reusable templates and live WebSocket previews. It lets non-technical managers launch promotion pages in under two minutes, with 90% less developer involvement.

I’ve also delivered Next.js and Strapi CMS platforms, multilingual projects integrated with REST APIs, and lightweight landing pages. I improved a production app’s performance score from 55 to 92 and its accessibility score from 83 to 100, while keeping layouts responsive across devices.

Experience

Work history, roles, and key accomplishments

IN

Freelance Frontend Engineer

Independent

Apr 2023 - May 2024 (1 year 1 month)

Delivered 5+ commercial, SEO-focused Next.js projects for confidential clients. Shipped mobile-first interfaces with clean, maintainable codebases.

BU

Frontend Engineer

Baza Trainee Ukraine

Feb 2023 - May 2023 (3 months)

Developed frontend features with React, Redux and REST API integrations.

Education

Degrees, certifications, and relevant coursework

HS

Hillel IT School

Frontend development, Frontend Development

Completed frontend development courses.

IT

ITEA

Frontend development, Frontend Development

Completed frontend development courses.

Coursera logoCO

Coursera

Frontend development, Frontend Development

Completed frontend development courses.

Udemy logoUD

Udemy

Frontend development, Frontend Development

Completed frontend development courses.

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