# Aleksandr Efremovtsev

Aleksandr Efremovtsev is a remote worker on Himalayas, Senior Frontend Engineer at ROGII Europe, based in Serbia.

Source: https://himalayas.app/@aleksandrefremovtsev

```text
Senior Frontend Developer at ROGII Europe who improved AI-assisted development workflows by ~30%.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Serbia |
| Authorized to work in | Serbia |
| Salary expectations | 30k+ USD |
| Job categories | Front End Developer |
| Skills | Frontend Development, React, TypeScript, JavaScript, Next.js, Redux, SPA Development, Web Application Development, Real Time Rendering, WebSockets, WebWorkers, WebGL, NodeJS, PostgreSQL, Drizzle ORM |
| GitHub | https://github.com/Efremovtsev |

## What I'm looking for

```text
I’m open to remote work offers in APAC and European time zones (GMT+7).
```

## About

```text
At ROGII Europe, I developed complex monitoring systems designed to render heavy streams of real-time data. I also rebuilt the development workflow with Claude Code and Cursor, reducing time spent writing code and tests and on code review by about 30%.

Earlier, at Performance Lab, I turned a partially working UXCrowd project with bugs and legacy code into a working product and developed services including interview transcripts and a First Click test. I’ve also developed React portals and SaaS platforms, and mentored UI developers.
```

## Experience

### Senior Frontend Engineer

ROGII Europe. Nov 2022 - Aug 2026

```text
Developed high-performance monitoring systems with a focus on rendering performance under real-time data streams. Reduced time spent on coding, testing, and code review by ~30% through AI-driven development with Claude Code and Cursor.
```

Skills: React, TypeScript, Redux, WebSockets, WebWorkers, WebGL, AI-Tools, Claude-Code, Cursor

### Frontend Developer

Flow Health, Inc. Feb 2022 - Nov 2022

```text
Developed the company's SPA portals using React, TypeScript, and Redux. Brought two portals for different business roles to release and extended the in-house UI kit of React components.
```

Skills: React, TypeScript, Redux, Redux-Saga, React-Hook-Form, JSS, styled-components, Webpack, AWS, GitHub

### Senior Frontend Developer

Performance Lab. Feb 2020 - Feb 2022

```text
Developed the SPA for the UXCrowd project, turning a partially working project with bugs and legacy code into a working one and updating the stack. Developed new services such as interview transcripts, a First Click test, and a prescreener.
```

Skills: React, Redux, Redux-Saga, React-Hook-Form, Angular, Webpack, Gulp, Gitlab, Jenkins, Chrome-Extension-development, Mentorship

### Senior Frontend Developer

National Financial System JSC. Sep 2019 - Feb 2020

```text
Developed a SaaS platform with direct connection to acquiring banks for cashless settlement in the metallurgical industry. The project was shut down after 5 months for financial reasons.
```

Skills: React, React-Hooks, Redux, Redux-Saga, Material-UI, React-Final-Form, DevExtreme, Material-Table, WebSockets, JWT, Webpack, Git, Jira, Confluence, Bitbucket

### Frontend Developer

Banki.ru. Jan 2017 - Aug 2019

```text
Developed modules in native JavaScript, ES6-7, and jQuery, a component library in React, and applications with Redux, Redux Form, Flux, and Material UI. Worked on HTML/CSS markup and project builds using Gulp and Webpack.
```

Skills: JavaScript, ES6, Babel, TypeScript, React, Redux, Redux-Form, AMD, CommonJS, BEM, Stylus, Twig, AngularJS, Pug, Gulp, Webpack, jQuery, PHP, Vue.Js, SASS-LESS, Angular-UI-Bootstrap, Git

## Education

### English for IT

Certificate, English

```text
Completed the English for IT course at B1-B2 level in 2024.
```

### React Native 2020. Mobile applications in JavaScript

Certificate, Mobile Development

```text
Completed the React Native 2020 course on mobile applications in JavaScript in 2020.
```

### Moscow Institute of Physics and Technology (MIPT)

Bachelor's degree, Applied Physics and Mathematics

```text
Studied Applied Physics and Mathematics at the Moscow Institute of Physics and Technology, graduating in 2012.
```

## Tech stack

- GitHub
- GitLab
- Bitbucket
- Jenkins
- React Native
- Sass
- Less
- Stylus
- PostgreSQL
- Node.js
- Next.js
- Twig
- Material-UI
- BEM
- Jira
- Babel
- styled-components
- React
- jQuery
- AngularJS
- WebGL
- Flux
- Webpack
- gulp
- JavaScript
- HTML5
- PHP
- Confluence
- Redux
- redux-saga
- TypeScript
- Pug
- Git
- Drizzle ORM
- Cursor
- React Hook Form
- Claude Code

To contact Aleksandr, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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