Сергій

SERHII KABAK
Senior Frontend Engineer
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SUMMARY
Senior Frontend Engineer with 9 years of professional experience building
complex e-commerce platforms and enterprise web applications.
Strong expertise in React, TypeScript, JavaScript, Next.js, GraphQL, and
frontend architecture, with hands-on experience designing and implementing
applications with complex business logic, data-intensive workflows, and high-
volume integrations.
Experienced in frontend architecture, legacy platform migrations, SSR/SEO,
performance optimization, client-side data management, API integration, and
production incident analysis. Actively use AI-assisted development with Kiro,
ChatGPT, and Claude, including multi-agent development workflows.
Worked extensively with large e-commerce platforms and enterprise
applications, including MAUDAU, Ringoo, and Golden Record Article.
Comfortable owning frontend features and technical solutions from initial
design and implementation through production.

TECHNICAL SKILLS

Core Languages: JavaScript (ES6+), TypeScript, HTML5, CSS3/Sass/SCSS
Frameworks & Libraries: React, Next.js (SSR/RSC), Vue.js,
State & Data Management: Zustand, Redux Toolkit, xState Machine, React
Query (TanStack Query), GraphQL (Apollo), RESTful APIs, Web Socket
Styling & UI: Tailwind CSS, CSS Modules, Styled Components, Material-UI,
Hero UI, Chakra UI, Design Systems
Performance & Optimization: Core Web Vitals (INP, LCP, CLS), Code Splitting,
Lazy Loading, Webpack, Vite, Redis, Cloudflare
Testing & Monitoring: Playwright, Jest, React Testing Library, Lighthouse CI,
Sentry, Grafana
Tools & Environment: Git, GitHub Actions, Docker (basics), AWS S3/
CloudFront, Figma (for developer handoff)
SEO & Analytics: Technical SEO, Structured Data, Google Analytics, Google
Tag Manager
Architecture & Concepts: Micro-Frontends, Web Accessibility (WCAG 2.1),
Responsive/Mobile-First Design, CI/CD

PROFESSIONAL EXPERIENCE

TEMABIT SOFTWARE DEVELOPMENT
Senior Frontend Engineer · Aug 2020 – Sep 2026
Worked on multiple large-scale e-commerce and enterprise products, including
MAUDAU, ringoo.ua, and Golden Record
Article.

GOLDEN RECORD ARTICLE — Enterprise Product
– Owned the frontend architecture and end-to-end implementation of an
enterprise article-management product.
– Built the application as part of a larger Module Federation ecosystem.
– Designed and implemented complex registries for articles, logistics
data, barcodes, sales units, business rules, and other domain-specific
data.
– Designed data-intensive frontend workflows handling large datasets
and high-volume business operations.
– Built client-side data processing and storage flows using IndexedDB,
including mass import/export, editing, validation, request queuing, and
error handling.
– Designed cache invalidation and data-fetching strategies to support
large-scale data processing and reliable integration with backend
services.
– Worked with React, TypeScript, Vite, GraphQL, Apollo Client, TanStack
Query, Zustand, Redux, XState, React Hook Form, and XLSX.
– Integrated enterprise authentication and authorization using Azure
SSO and ABAC.

MAUDAU — E-commerce Marketplace
– Developed complex marketplace functionality across catalog, product
pages, checkout, payments, delivery, promotions, business logic, SEO,
and analytics.
– Drove the complete migration from Vue Storefront to React,
addressing architectural limitations of the existing platform.
– Designed and implemented frontend solutions for complex business
requirements and integrations.
– Improved application performance through bundle optimization,
request optimization, page/data caching, Redis, and Cloudflare.
– Implemented SSR and technical SEO, including structured data,
redirects, and a dedicated redirect management service.
– Used analytics and application metrics to identify performance and
production issues.
– Led critical production incident response, including rollback, log and
metric analysis, root-cause investigation, and postmortem preparation.
– Contributed to technical direction and frontend delivery through code
reviews, technical discussions, task decomposition, estimation,
mentoring, onboarding, and technical interviews.
– Worked as a Team Lead for one of the frontend teams, helping
coordinate technical priorities and sprint goals.

RINGOO — E-commerce Marketplace
– Developed a large e-commerce marketplace using Vue.js and Vue

–
Storefront.
– Worked across the platform, including homepage, catalog, product
pages, filters, checkout, delivery, payments, promotions, SEO,
analytics, and business logic.
– Extended and customized Vue Storefront to support complex product
requirements.
– Redesigned the filtering approach and URL structure to address SEO
requirements.
– Implemented complex checkout functionality including delivery
methods, payments, and promo codes.
– Integrated the frontend with Magento 2, ElasticSearch, REST APIs.
– Worked with SSR, SEO, performance optimization, and third-party
integrations.

WEBCAPITAN
Frontend Developer · Oct 2017 – Aug 2020
– Developed landing pages, startup products, and web applications
using JavaScript, HTML/CSS, and Vue.js 2.
– Built products including a taxi service, email-generation tools, and a
media-sharing platform integrated with Google and OneDrive.
– Implemented responsive interfaces, reusable components, business
logic, and API integrations.
– Worked across multiple projects with different business requirements
and technical constraints.
– Mentored less experienced developers.

AI-ASSISTED DEVELOPMENT
– Use Kiro, ChatGPT, and Claude as part of the software development
workflow.
– Use Kiro's multi-agent orchestration with specialized Developer,
Reviewer, and QA agents.
– Define dedicated skills and responsibilities for agents to support
implementation, code review, testing, debugging, and technical
exploration.
– Use AI tools for code generation, refactoring, debugging, technical
research, code review, and development workflow automation.
– Maintain developer ownership of architecture, technical decisions, and
final implementation.

Education
Master of Science in Information Systems and Technologies
Vinnytsia National Technical University, Vinnytsia, Ukraine | 2017 – 2019

Bachelor of Science in Automation and Computer-Integrated Technologies
Vinnytsia National Technical University, Vinnytsia, Ukraine | 2013 – 2017