Sergei Vinogorov — Senior Frontend Engineer

Expertise in Front-End Web (7.0 yr.), React Developer (6.0 yr.).

Last verified on April, 2026

Core Skills

GraphQL

2 yr.

Redux-Saga

Bio Summary

Over 6 years of experience in frontend engineering with expertise in React, TypeScript, GraphQL, and state management libraries like Redux and Zustand.
Proven track record in optimizing performance (up to 40%) and reducing load and deployment times through modular architecture and build pipeline enhancements using Webpack and Vite.
Strong background in scalable UI architecture, CI/CD, accessibility (WCAG).
Hands-on experience leading teams and improving development workflows with structured Git-flow and PR rules, enhancing code quality and delivery speed.
Skilled in integrating third-party APIs, micro frontends, and real-time communication via WebSockets.

Technical Skills

Programming Languages	JavaScript, TypeScript
JavaScript Frameworks	Node.js, React, Vue.js
JavaScript Libraries and Tools	Redux-Saga, Vite, Webpack, Zustand
UI Frameworks, Libraries, and Browsers	Material UI, Tailwind CSS
Deployment, CI/CD & Administration	CI/CD
Virtualization, Containers and Orchestration	Docker
Version Control	Git
SDK / API and Integrations	GraphQL
QA, Test Automation, Security	Jest, React Testing Library
Web/App Servers, Middleware	SPA
Methodologies, Paradigms and Patterns	WCAG
Mail / Network Protocols / Data transfer	WebSockets
Other Technical Skills	Micro-frontends, Performance Optimization

Work Experience

Middle Frontend Engineer (Team Lead) - Sberbank CIB (Scalable UI Architecture for Fintech Applications)

Duration: April 2024 - Present

Summary:

Development of scalable and high-performance fintech applications using modern frontend technologies
The project focuses on creating a modular and maintainable UI architecture to support rapid feature delivery in the financial sector

Responsibilities:

Led the design and implementation of scalable UI architecture using React, TypeScript, and GraphQL.
Implemented modular architecture to accelerate feature delivery.
Developed validation and data fetching solutions with Yup and Apollo GraphQL.
Improved Git workflow by establishing structured pull request rules to enhance code review efficiency and reduce deployment errors.

Technologies: React, TypeScript, GraphQL, Apollo GraphQL, WebSockets, Modular Architecture, CI/CD, Accessibility, Git

Middle Frontend Developer - Right Line (Large-scale SaaS Frontend Refactoring and Feature Delivery)

Duration: March 2022 - March 2024

Summary:

Refactoring and optimization of a large-scale SaaS frontend application to improve performance and reduce load times
The project involved close collaboration with cross-functional teams to align UI/UX with business requirements and deliver major features efficiently

Responsibilities:

Refactored frontend architecture to improve application performance and reduce load times.
Delivered over 10 major features while optimizing build pipelines.
Collaborated with product owners, designers, and backend teams to ensure smooth delivery and alignment with business needs.

Technologies: React, Next.js, TypeScript, GraphQL, Node.js, Webpack, Vite, Performance Optimization, Nest.js, Material UI, MobX

Frontend Developer - Right&Above (High-load Platform Document Export and Identity Verification Features)

Duration: July 2021 - February 2022

Summary:

Development of document export and QR-code features for a high-load platform with over 1,000 daily users
Integration of third-party identity verification APIs to automate processes and improve efficiency

Responsibilities:

Developed document export and QR-code functionalities.
Integrated SumSub API for identity verification, reducing manual processing time.
Set up Docker-based development environments to streamline onboarding.

Technologies: JavaScript, React, TypeScript, Node.js, REST APIs, WebSockets, Jest, Docker, Modularization Development

Frontend Developer - Digital Sector (Data Visualization Dashboards and COVID-19 Widget)

Duration: May 2020 - June 2021

Summary:

Creation of data visualization dashboards and a widely used COVID-19 information widget
The project aimed to enhance data presentation and user engagement through reusable components and modular state management

Responsibilities:

Developed Vue.js dashboards and analytics to boost data visualization performance.
Built a React-based COVID-19 widget serving over 100,000 daily users.
Introduced reusable Vue components and modularized state handling to speed up UI feature delivery.

Technologies: Vue.js, React, TypeScript, Tailwind, Webpack, Modularization Development

Frontend Engineer - UniqTrip (Browser Extension and Interactive Map Integration)

Duration: December 2019 - April 2020

Summary: Development of a browser extension and integration of interactive Google Maps features to enhance user engagement and retention for a travel-related platform.

Responsibilities:

Proposed and developed a browser extension to increase user retention.
Integrated Google Maps with interactive features to improve engagement and reduce bounce rate.

Technologies: React, TypeScript, REST APIs, Tailwind, CI/CD

Frontend Engineer - Self-Employed (Freelance Frontend Projects)

Duration: May 2019 - November 2019

Summary:

Delivered multiple end-to-end frontend projects including design, development, and production hosting
Focused on improving SEO and performance through modern build tools and optimization techniques

Responsibilities:

Managed full project lifecycle from design to production deployment.
Enhanced SEO and performance by implementing Webpack optimizations and code-splitting.

Technologies: React, TypeScript, REST APIs, Webpack, Git

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