Viacheslav

CONTACT VIACHESLAV MATVIEIEV
FRONTEND ENGINEER
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LinkedIn PROFILE
Portfolio
Frontend Engineer with 3 years building production‑grade web
SKILLS apps across sports, fintech, IoT, and e‑commerce. Shipped
features as sole frontend developer on real‑time streaming
FRONT-END TECHNOLOGIES systems; contributed to enterprise‑scale component libraries
serving major UK clients. Comfortable owning work end‑to‑end
JAVASCRIPT
‑ from architecture decisions to deployment. Looking for
TYPESCRIPT remote contract or short-term roles with US/EU product teams.
REACT
WORK EXPERIENCE
NEXT.JS

VUE.JS
WEB DEVELOPER — FREELANCE
NOVEMBER 2022 – AUGUST 2023
HTML5
FEBRUARY 2026 – PRESENT

CSS3
Delivered 7 production landing pages across industries ‑
SASS pixel‑perfect, responsive, accessible, and cross‑browser,
BEM built with React, Next.js, Bootstrap, and Tailwind CSS
Acted as a consultant beyond pure development ‑
BOOTSTRAP
proactively proposed design improvements that were
TAILWIND CSS adopted into final deliverables
REDUX Extended scope beyond frontend when needed: built
custom REST APIs with NestJS/Node.js, integrated
MOBX
third‑party APIs, and configured Gmail SMTP
ZUSTAND
FRONTEND ENGINEER — WHITETECH
I18NEXT JULY 2025 – OCTOBER 2025

STORYBOOK - WEB APPLICATION BUILDER PLATFORM
ZOD Joined a no‑code web application builder platform at
pre‑MVP stage ‑ contributed 10+ UI components to the
REST API
React/Next.js (SSR) codebase and integrated them into the
JWT Storybook library with Jest test coverage
WEBSOCKET Improved overall product quality by systematically
resolving visual, logical, cross‑browser, and accessibility
TESTING
issues inherited from the prototyping phase
JEST
Reassigned prior to MVP release to a higher‑priority
REACT TESTING LIBRARY production project ‑ a recognition of capacity and reliability
DEV TOOLS & COLLABORATION rather than a project end

NX - DIGITAL KEY MARKETPLACE
GIT Sole frontend developer on a major new feature ‑ a
real‑time messaging system for customers and sellers built
BITBUCKET
with Vue 3 and WebSocket
FIGMA Integrated the messenger seamlessly into a legacy
JIRA JavaScript/jQuery/PHP codebase with no disruption to
existing functionality
KANBAN
Managed a complex local development environment
SCRUM independently using Ubuntu VM with Docker
Delivered end-to-end within a 3‑week deadline
LANGUAGES SOFTWARE ENGINEER — GLOBALLOGIC
AUGUST 2023 – AUGUST 2025

ENGLISH PROFESSIONAL - UK MAJOR SPORTS CLUB
Worked as part of a 30+ person international Agile team
UKRAINIAN NATIVE
maintaining and extending a suite of applications for a
RUSSIAN NATIVE major UK sports club
Contributed 20+ reusable components to the internal
EDUCATION Storybook library, used across 3 production applications
Replaced 6 third‑party UI components with custom React
SEPTEMBER 2020 – JUNE 2024
implementations, improving Lighthouse score by ~15
points and eliminating ~200KB from the production bundle
BACHELOR'S DEGREE IN
Implemented REST API integrations across the application
COMPUTER ENGINEERING
suite, handling data transformation and normalization for
PETRO MOHYLA BLACK SEA
NATIONAL UNIVERSITY centralized state management
Resolved a critical auth flow bug on a legacy iOS version ‑
traced an endless redirect loop and incorrect token
handling, restoring login functionality for all affected users
Promoted mid‑engagement to carry frontend on a new
product division ‑ bootstrapped a Next.js app from zero to
demo in 4 weeks, including Jest/RTL testing infrastructure,
SSR/SSG architecture, and a product‑specific design token
framework

- UKRAINIAN VIDEO & TELEMETRY STREAMING
APPLICATION
Sole developer (frontend + tooling) on an internal IoT
dashboard ‑ owned the full lifecycle from architecture
design to remote deployment via SSH, delivering in 3 weeks
Built a real‑time telemetry visualization interface in React,
consuming live data streams with sub‑second latency
Developed a Python data emulator from scratch to
generate and transmit telemetry signals, enabling frontend
development and testing without physical hardware at
early stage
Implemented HLS video streaming alongside the telemetry
dashboard, delivering a unified real‑time monitoring
interface

- US FUND SERVICE
Delivered new features and legacy improvements across a
multi‑app fintech platform serving US‑based financial
services clients, working across both modern React and
jQuery codebases
Wrote comprehensive Jest test coverage for existing
functionality, improving codebase stability ahead of new
feature rollout
Integrated backend API endpoints to enable feature
coordination across multiple client‑facing applications,
collaborating directly with backend developers