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Frontend Developer with over 10 years of experience building scalable Single-Page Applications (SPA) and high-performance Server-Side Rendering (SSR) systems. I excel at refactoring complex legacy systems and delivering modern frontend architecture across large codebases, including microservices and monorepos.…

Aleksei Chernov

Front-End Developer, Web Developer, Developer

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Frontend Developer with over 10 years of experience building scalable Single-Page Applications (SPA) and high-performance Server-Side Rendering (SSR) systems. I excel at refactoring complex legacy systems and delivering modern frontend architecture across large codebases, including microservices and monorepos.…

Available to hire

Frontend Developer with over 10 years of experience building scalable Single-Page Applications (SPA) and high-performance Server-Side Rendering (SSR) systems. I excel at refactoring complex legacy systems and delivering modern frontend architecture across large codebases, including microservices and monorepos.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Russian

Fluent

Work Experience

Senior Frontend Developer at BALANCY

May 1, 2024 - Present

Led frontend development for a liveops and monetization platform for games and game designers. Delivered key features including Roles & Permissions and a Git-like Save & Revert workflow using React 18, Redux RTK, Chakra UI, Webpack, and TypeScript. Improved UI quality and prevented regressions by integrating Storybook & Loki with unit/integration/e2e testing standards (Jest, Enzyme, React Testing Library). Performed system-wide architecture and technical-debt audits and prioritized a stability roadmap with staged refactoring. Optimized performance to improve SEO-critical metrics (LCP: 5.8s → 1.9s, CLS: 0.25 → 0.05), contributing to client retention. Coordinated with CTO, CEO, Backend, DevOps, and Product to align engineering delivery with product goals; led estimation and task decomposition for complex projects.

Senior Frontend Developer at THEAPPS.CLOUD

April 1, 2023 - February 1, 2024

Built multiple SaaS applications from scratch for the Semrush ecosystem (Plagiarism Checker, Website Speed Test, Email Verifier). Implemented a clean Simple Modular Architecture using Atomic Design and the Intergalactic UI kit to ensure reusable, scalable UI across projects. Established frontend code standards and modern testing practices, achieving full test coverage for new products by integrating Storybook & Loki and using Jest & React Testing Library. Projects were delivered in an average of ~2.5 months each.

Lead Frontend Developer at BIGANTO

October 1, 2020 - September 1, 2022

Architected a complex refactor of a micro-services monorepo for a real-estate virtual tours and 3D camera solution. Applied Feature-Slicing Design (FSD) and modern frontend patterns to increase stability and performance. Improved page load performance (LCP: 3.2s → 1.1s, CLS: 0.2 → 0) and increased system reliability. Implemented a quality-first approach with Storybook & Loki (visual regression), e2e/integration testing, and Jest & Enzyme unit testing (up to ~90% coverage), along with standardized architectural design patterns. Reduced post-release defects by introducing a pair code-review process and CI/CD automation (linting and auto-tests approvals) in collaboration with DevOps.

Senior Frontend Developer at INKTECH

October 1, 2016 - May 1, 2020

Developed multiple versions of a main website and subdomains with mobile-first focus across SSG (Gulp), SPA (React + Webpack), and GraphQL (Apollo). Implemented reusable component architecture emphasizing performance, accessibility, cross-browser compatibility, and maintainable styling. Collaborated with CTO/backend teams on API design and backend support (PHP, Symfony, Twig). Delivered product features including in-platform games built with PixiJS (4 games in ~6 months), adaptable WebSocket chat, lazy loading and endless scroll, animated landing experiences, and complex data views (tables/articles). Maintained ~99.9% uptime using proactive legacy refactoring, BackstopJS visual regression, and Jest/Enzyme unit tests. Ensured accessibility via semantic HTML, keyboard navigation, form/media validation, and ARIA roles.