Maksim Riazantsev | Frontend Engineer

About

Frontend Engineer with 6 years of commercial experience and 2 years of team leadership, working in teams from 2 to 30 members. Proven ability to design, develop and optimize high-performance web applications, delivering seamless user experiences through scalable, well-architected frontend systems. Experienced in full development cycles, from gathering requirements to automating releases with high test coverage, detailed analytics and CI/CD pipelines. Improved code quality by replacing spaghetti code with modular, well-documented and reusable components. Implemented design systems, component-based architectures and state management solutions to enhance scalability and maintainability.

Beyond frontend development, I stay up to date with emerging trends in robotics and artificial intelligence, exploring their influence on web technologies. Committed to continuous learning and innovation.

Experience

Brex | Frontend Engineer

Aug 2023 - Present

Optimized rendering performance, reducing transaction reconciliation time from 3 days to 4 hours.
Developed a real-time financial analytics dashboard, improving data visualization and reducing corporate expense management costs by 35.4%.
Decreased fraudulent transactions by 25.8% through an automated monitoring system.
Increased financial department efficiency, cutting report preparation time by 48.6%.

Retool | Frontend Engineer

May 2021 - Jul 2023

Designed and implemented a dynamic no-code form builder, reducing customer development costs by 34.2%.
Optimized UI state management, reducing user input time by 58.6%.
Led frontend development for product expansion, increasing the active user base by 25.3%.
Managed and mentored a team of 5 frontend engineers, improving release efficiency by 41.7% and cutting production bugs by 30.9% through robust testing and CI/CD integration.

ServiceNow | Frontend Engineer

Jan 2019 - Apr 2021

Reduced IT support workload by 38.7% by developing a self-service portal for automated request handling.
Improved internal business processes, reducing average task completion time by 29.5%.
Increased employee satisfaction, raising the IT support CSI score from 3.8 to 4.4.
Optimized the frontend’s performance and load efficiency, lowering IT infrastructure costs by 24.8%.

Skills

JavaScript

TypeScript

React.js

Next.js

Redux

Zustand

React Query

Tailwind CSS

ShadCN

Webpack

Vite

Chart.js

REST APIs

WebSocket

GraphQL

Docker

GitLab CI/CD

GitHub Actions

Vitest

Jest

Playwright

Projects

Professional Landing

Developed a React app with Vite and custom server-side rendering for SEO and performance optimization, including a theme with SSR support.

Clock

Built a clock application with React, featuring alarm, timer, time zones, and stopwatch functionality, with a strong focus on date manipulation and handling.

Auth Form

Created a custom authentication form using React and CSS, building all components from scratch without relying on external libraries, ensuring high performance and reusability.

Articles

Building Production-Ready SSR React Applications Advanced React SSR Techniques with Streaming and Dynamic Data Setting Up Themes in SSR React Applications Top Tools for React Server-Side Rendering Applications

Contact

riazantsev.maksim.work@gmail.com