Denys

Denys Malko
Location: Chernihiv, Ukraine
Email: [open contact info](look above in the "contact info" section)
Teams: malko.denis
Frontend Engineer | React | Next | Shopify | eCommerce Tel.: [open contact info](look above in the "contact info" section)
Telegram: @Denys_Malko | LinkedIn
Frontend Engineer with 10+ years of experience building scalable eCommerce
platforms and high-performance web applications. Skills

Specialized in Shopify and modern frontend technologies (React, Next.js, eCommerce Platforms
TypeScript), with deep expertise in performance optimization, API integrations
(GraphQL/REST), and component-driven architecture. ● Shopify
● Salesforce Commerce
Proven track record of delivering conversion-focused features, building ● Cloud (Demandware, SFRA,
complex UI systems (product configurators, dynamic storefronts), and PWA Kit)
optimizing Core Web Vitals in production environments across Shopify, ● Magento 1, 2
Salesforce Commerce Cloud, Magento, and headless architectures. ● Wordpress

Core Skills
Experience
● JavaScript / TypeScript
Speroteck, Ukraine, USA — Frontend Developer ● React / Vue (hooks, state
SEP 2014 - Present management, performance
optimization)
● Delivered high-performance eCommerce storefronts across Shopify, ● Next.js / Nuxt (SSR, SSG, App
SFCC, and Magento, supporting high-traffic eCommerce platforms. Router basics)
● Rebuilt SFRA architecture improving maintainability and reducing ● HTML (HTML5)
technical debt. ● CSS, Tailwind, Bootstrap, Chakra
● Optimized site performance using Lighthouse audits (LCP, CLS, TTI), UI, Less, Sass
improving page load speed and Core Web Vitals. ● GraphQL/REST API
● Developed a complex product configurator enabling dynamic pricing and ● Component Architecture
customization logic. ● Client/Server rendering patterns
● Built advanced UI components (Quick View, product gallery with zoom), ● Responsive designs
improving product discovery experience. ● State Management Concepts
● Reusable UI systems
● Improved conversion flow by optimizing PDP/PLP interactions and UX
● Core Web Vitals (LCP, CLS, INP)
patterns.
● Collaborated with cross-functional teams to deliver scalable frontend
eCommerce Expertise
architecture aligned with business requirements.
● Owned frontend delivery for multiple eCommerce projects as the primary ● Shopify Theme Development
frontend engineer, taking responsibility for architecture decisions, ● Liquid Templates
estimations, implementation, and production releases. ● Metafields
● Storefront API
Speroteck (Client: CQL), USA — Shopify Developer ● Searchspring Integration
SEP 2024 - MAR 2026 ● PLP / PDP / CLP Development
● Performance optimization
● Built and extended Shopify storefronts using Liquid + React
● Product personalization
(Searchspring, Propel Search UI).
● Headless integrations
● Integrated Searchspring, enabling advanced filtering, personalization,
and recommendation systems. Leadership & Delivery
● Developed a complex delivery selection system based on store location,
reducing checkout friction and improving user experience. ● Frontend Ownership
● Optimized storefront performance (lazy loading, script optimization, ● Technical Planning & Estimation
Liquid loops), improving Core Web Vitals and page load speed. ● Code Reviews

● Implemented dynamic product listing experiences using API-driven UI ● Mentoring Developers
updates. ● Client Communication
● Built reusable Shopify sections and blocks, enabling non-technical
merchants to manage content. Building & Automation Tools
● Developed "Buy Now" and Quick Add flows improving conversion rate.
● Customized Searchspring UI (facets, pagination, product tiles, ● Turbopack
recommendations). ● Vite
● Integrated Storefront GraphQL API for dynamic product data fetching. ● Webpack
● Improved product discovery and filtering UX through Searchspring ● Gulp/Grunt
customization. ● CI/CD (GitHub Actions)
● Acted as the primary frontend engineer on several Shopify projects, ● Docker
leading frontend implementation, technical decision-making, estimations,
and delivery. AI Tools

Media Works 7, Ukraine, USA, Netherlands — Full Stack Developer ● AI tools (Codex, AI-assisted
SEP 2009 - SEP 2014 coding)
● Prompt engineering for
● Created new layouts and designs to enhance the user interface. development workflows and
● Updated designs according to new mockups and design specifications, debugging
ensuring a visually appealing and cohesive user interface.
● Developed and customized WordPress themes to meet client-specific Project Management Tools
requirements.
● Created custom plugins to enhance website functionality and features. ● Atlassian products (JIRA,
Ensured responsive design and optimized user interface for Confluence, Bitbucket)
cross-device compatibility. ● Redmine, Fieldglass, Clockify
● Provided ongoing support and improvements for existing WordPress
projects.
Design Tools
● Developed and customized Magento themes to align with client
requirements and branding guidelines.
● Figma, Zeplin
● Built and optimized custom Magento modules to extend core
● Adobe Photoshop
functionality and meet unique business needs.
● Sketch
● Worked on frontend customization, including responsive design
implementation and optimizing user experience for mobile and desktop
devices. Education
● Collaborated with backend developers to implement complex
ecommerce workflows, including custom checkout processes and Systems Programming, Chernihiv
inventory management systems. State Technological University

Certifications

● Liquid Storefronts for Theme
Developers
● Shopify Foundations Certification
● Salesforce Certified B2C
Commerce Developer
● M2 Professional Developer

Languages

● Ukrainian (native)
● English (B2 - Upper-Intermediate)
● Russian (native)