Open to opportunities

Сергей Шабалин

@0003492

I’m a frontend developer who builds fast, well-tested React applications with strong architecture and real-time features.

Serbia

Message

What I'm looking for

I’m looking for a frontend role where I can own React architecture, build high-performance UI, and ship real production impact—working closely with design and backend teams, using modern tooling and strong CI/CD and testing.

I’m a frontend developer at Sber, where I design application architecture and configure modern build tools like Webpack, Vite, and Next.js. I keep code quality high with ESLint and Prettier, and I focus on maintainable standards through code reviews and refactors.

In my current role, I implement complex business logic: virtualized lists, multilingual support with i18next, dashboards with Chart.js, and form validation using React Hook Form with Zod and Yup. I also work with Redux Toolkit and RTK-Query, set up real-time event processing with KafkaJS, and optimize performance with React Core Web Vitals (including code splitting, memoization, and caching).

Before Sber, I developed as a Junior+ frontend developer, building and redesigning UI components, fixing bugs, and writing unit/UI tests with Jest and Cypress. I also supported Scrum processes (including Scrum Master responsibilities), collaborated with designers and backend developers, and helped refactor legacy code. Earlier, I worked on two small-business projects at Encoders, including an admin panel and a CRM system with authentication and clean UI structure.

Experience

Work history, roles, and key accomplishments

Current

Middle+ Frontend Developer

Current

Sber

Nov 2024 - Present (1 year 8 months)

Designed application architecture and build tooling (Webpack/Vite/Next.js) with code-quality configuration (ESLint/Prettier). Implemented business logic with Redux Toolkit, RTK-Query, React Hook Form, Zod, dashboards (Chart.js), multilingual support (i18next), KafkaJS real-time processing, and performance/accessibility optimizations (reduced page load time by 32%).

Junior+ Frontend Developer

Sber

Sep 2023 - Nov 2024 (1 year 2 months)

Developed new features and component layouts, redesigned UI, and participated in code reviews and bug fixing. Wrote unit/UI tests (Jest, Cypress), optimized React components, implemented interaction metrics tracking, supported Scrum activities, and refactored legacy code to improve maintainability and accessibility.

JavaScript Webpack Vite Jest Cypress ESLint Prettier Git Bitbucket Pipelines Scrum Scrum Master OpenShift ArgoCD I18next React Web Accessibility UI Testing Metrics

Junior Frontend Developer

Encoders Project

Jul 2022 - Sep 2023 (1 year 2 months)

Participated in development of two small-business projects (medical center admin panel and CRM for task management). Fixed bugs, added features, decomposed tasks, implemented user logic, laid out UI blocks, and configured authentication.