Denys Kozak

Frontend Engineer

Nazaré, Leiria, Portugal9 yrs 6 mos experience

Most Likely To Switch

Key Highlights

Designed micro-frontend architecture for 10M+ users.
Led frontend development for multiple high-impact projects.
Expert in React and micro-frontends with extensive experience.

Stackforce AI infers this person is a Frontend Architect specializing in E-commerce and Fintech with a focus on scalable web applications.

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Skills

Core Skills

ReactMicro-frontendsFrontend Development

Other Skills

System DesignUser-interface libraryMemory optimizationUser interface simplificationUser interface designReact.jsUser-interface solutionsAngular.jsUI/UX optimizationJavaScriptZend FrameworkNode.jsEnd-to-end TestingMERNThree.js

About

Frontend Architect with 12+ years experience building scalable web applications (up to 10M+ monthly users). Specialized in React, SSR micro-frontends and high-load interfaces. Focused on improving scalability, reliability, maintainability and developer experience Tech Stack - React | Typescript | NextJS | Astro | Micro-frontends | SEO | SSR | System Design Domains: E-commerce, Med-tech, Fin-tech, Startups, CRM Github: 2700+ year commits NPM packages: over 10k downloads

Experience

Autodoc

Engineering Front-end Lead

Jan 2024 – Present · 2 yrs 2 mos · Portugal · Remote

E-commerce - autodoc.de
Europe
designed and implemented micro-frontend architecture serving 10M+ users
deliver front-end infrastructure libraries for over 30 developers
lead a team, build personal growth plans, task decomposition
introduced observability → detected memory leaks → improved stability

ReactMicro-frontendsSystem Design

Concentrix tigerspike

Senior Frontend Developer

Jun 2021 – Nov 2023 · 2 yrs 5 mos · Greater London, England, United Kingdom · Remote

Fin-tech (Digital Assets Market) - rain.com
Middle East oriented
craft a user-interface library for 120 developers
keep responsibilities for deposit / withdraw features
close working with memory optimisation in browser
Backed by: Coinbase, Paradigm, Dubai Internation Center

User-interface libraryMemory optimizationReact

Codemotion ninjas

Senior/Lead Frontend Developer

Jan 2018 – Dec 2020 · 2 yrs 11 mos · Kyiv, Ukraine · Remote

Fin-tech (Digital Assets, Startup) - swipelux.com
Czech Republic - Remote
Growth and lead frontend side from scratch for integrable digital assets exchange widget/sdk/api startup
lead startup frontend from scratch to production
bump up conversation rate x3 by simplify interface
obtain feedback-loop between customers and designers
Trusted by 100+ companies and top-tier investors: Polygon, DeFi Kingdoms, Biconomy and others

Frontend developmentUser interface simplificationFrontend Development