Skip to main content
Sergii BondarenkoSB
Open to opportunities

Sergii Bondarenko

@sergiibondarenko

I lead React and TypeScript platforms, replacing legacy dependencies with maintainable design systems and faster delivery.

Germany
Message

At EPAM, I own frontend architecture across 20 repositories and 14 shared libraries for a B2B/B2C platform. I replaced Material-UI with an in-house design system and migrated the platform from Node.js 12/npm 6 to Node.js 20/npm 10 without a production outage.

I've delivered frontend and full-stack products across PropTech, FinTech, data intelligence, and e-commerce. My UI experimentation at Resident increased storefront conversion from 0.27% to 1.64%, while performance work reduced page loads across 15+ sites from 8 seconds to under 1.5 seconds.

I build reusable component systems, CMS tools, testing practices, and cloud environments that help teams ship independently. I also mentor engineers through my own web-development curriculum; 11 mentees now work in the industry.

Experience

Work history, roles, and key accomplishments

RN

Senior Full-Stack JavaScript Developer

Real-estate tokenisation platform (NDA)

Mar 2024 - Nov 2024 (8 months)

Built a reusable component and template layer that cut feature development time by 20%. Designed and shipped a mini-CMS and admin interface to move routine work from engineers to operations.

IN

Senior Frontend Engineer

InventorSoft

Jul 2022 - Dec 2023 (1 year 5 months)

Delivered the frontend of the Dimension MVP, a real-time operational-insight platform. Built a custom canvas-based image annotation tool and established a private npm registry with Storybook documentation.

TL

Senior Frontend Engineer

Titanium Labs

Mar 2020 - Jun 2022 (2 years 3 months)

Ran A/B tests and funnel analysis that raised conversion from 0.27% to 1.64%. Optimized feature-flag system and delivery workflow, cutting development time by 60% for a four-engineer team.

TL

Senior Full-Stack JavaScript Developer

Titanium Labs

Dec 2018 - Feb 2020 (1 year 2 months)

Designed and implemented an AWS environment serving 300,000 users, cutting infrastructure spend. Migrated ~10 WordPress properties with no data loss and introduced TDD, reducing regression bugs by 15%.

TR

Full-Stack JavaScript Developer

Triare

Jan 2017 - Aug 2019 (2 years 7 months)

Built 10 web applications end to end for startup and SMB clients. Cut average page load on 15+ sites from 8 seconds to under 1.5 seconds through caching, asset minification, and image optimization.

Education

Degrees, certifications, and relevant coursework

KA

Kyiv State Maritime Academy

Navigation

2011 - 2013

Studied Navigation at Kyiv State Maritime Academy from 2011 to 2013.

Get matched with your dream remote job

Sign up now and join over 250,000+ remote workers who receive personalized job alerts, curated job matches, and more for free!

Sign up
Himalayas profile for an example user named Frankie Sullivan