Yuriy Breivo
Verified Expert in Engineering
Full-stack Developer
Warsaw, Poland
Toptal member since August 4, 2020
Yuriy is a seasoned software engineer and team leader with 7+ years of experience in full-stack development, specializing in JavaScript/TypeScript, Angular, and cloud technologies. With a proven track record of leading cross-functional teams, optimizing system performance, and delivering scalable solutions for global clients, he's an expert in reducing development cycles, improving user experience through innovative engineering practices, streamlining workflows, and driving technical excellence.
Portfolio
Experience
- MongoDB - 7 years
- Express.js - 7 years
- Node.js - 7 years
- JavaScript - 7 years
- TypeScript - 6 years
- Angular - 5 years
- Ionic - 3 years
- React - 2 years
Preferred Environment
MongoDB, JavaScript, Angular, Telegram Bots, Website Data Scraping, Node.js, RabbitMQ, Kubernetes, Proxies, Scraping
The most amazing...
...thing I've developed was a monitoring system with alerts in a Telegram bot. It allowed me to spot changes on scraped websites and add bypasses immediately.
Work Experience
Software and R&D Engineer
Bright Data
- Increased Google Ads display rate from approximately 25% to 70% per request, achieving the best industry-known result.
- Reduced parsing time for Google pages (e.g., search, shopping) from 4 seconds to 300 milliseconds through caching and tailored regular expressions.
- Decreased form submission time for a Brazilian government system from 17 seconds/request to 2 seconds/request by bypassing browser limitations.
- Built an AI-based tool to detect markup changes, reducing parsing ticket resolution time by 3x (from 12 to 4 hours).
- Designed specialized parsers for Google Lens and Google Hotels, enhancing product functionality.
- Researched web security bypasses. Focused on cookie/headers management, TLS fingerprinting, browser fingerprinting, IP rotation, etc., to unblock web resources.
Lead Front-end Engineer and Head of FE Department
Fintuity
- Designed and implemented a UIkit based on Angular Material, reducing bug tickets by 50% through a dedicated testing sandbox.
- Reduced bundle size from 8MB to 3.6MB by extracting common modules into shared libraries.
- Improved build and deployment time from 30 to 13 minutes by caching untouched modules.
- Removed 30% of project dependencies, improving codebase maintainability and team efficiency.
- Mentored and upskilled team members, promoting three junior developers to mid-level and one senior developer to team lead.
- Led the development of back office and front office products, ensuring high-quality UI/UX and performance.
- Established strong working relationships with clients through exceptional communication skills, fostering trust and collaboration.
Chief Programmer
Luxoft
- Worked with a team of three front-end and two back-end developers and accomplished a huge initiative to refresh outdated Dojo web applications to the latest Angular with a clear structure and easy debug process.
- Wrote unit and end-to-end tests to cover critical business cases, including around 40% of the critical project parts.
- Wrote a plugin for NgRx to reduce the amount of boilerplate.
Full-stack Software Developer and Team Lead
Bekitzur LLC
- Developed a marketing platform for configuring, tracking, and analyzing user activity based on tap experience of NFC tags.
- Migrated all native iOS and Android applications to an Angular/Ionic stack.
- Configured the CI/CD process for building and deploying iOS applications.
- Created and documented (in Swagger) a REST API for the main platform, based on the Nest framework.
- Led a hybrid mobile development team. Worked with project managers on Spring scope, task decomposition, and estimations.
- Served as a team leader and participated in client demos and roadmap discussions. Documented the feature delivery (versioning) process.
Front-end Developer and Team Lead
ENDYlab
- Created the front end for corporate websites, brand pages, and events using HTML5, CSS3, JavaScript, Webpack, Gulp, Pug, Twig, and PHP.
- Led the team that integrated front ends with Bitrix CMS, a top Russian content management system, and client-side analytical systems.
- Interviewed candidates, helped new hires adapt to the company culture, monitored performance, and helped with setting goals during trial periods.
Experience
Inpol Booking System
Under the hood, the app solves many challenges related to bypassing anti-bot protection, monitoring system changes, and other important metrics.
Analytical Platform for Thinfilm Electronics
Uteki
Nuxt.js. As a full-stack developer, I implemented the REST API service and developed the front-end. I also created the site administration UI based on the Strapi package.
Skills
Libraries/APIs
Node.js, NgRx, REST APIs, RxJS, Vue 2, Lodash, Ramda, jQuery, React, Vue 3
Tools
Angular CLI, Mongoose, Jira, IntelliJ IDEA, Slack, Postman, Xcode, Jenkins, CVS, RabbitMQ, Grafana, ChatGPT, Shell, Nx
Languages
JavaScript, HTML, SCSS, TypeScript, HTML5, CSS, Sass, Java, Swift, PHP, GraphQL
Frameworks
Angular, Vanilla JS, Ionic, Express.js, Angular Material, Redux, NestJS, Nuxt.js, Next.js, Material UI, Spring, Flutter, Tailwind CSS
Paradigms
Functional Reactive Programming, Object-oriented Programming (OOP), Declarative Programming
Storage
MongoDB, MySQL, PostgreSQL
Platforms
MacOS, Oracle Database, Docker, 1C Bitrix, Google Cloud Platform (GCP), Kubernetes, Firebase, Heroku
Other
Front-end Development, Front-end, Front-end Architecture, APIs, Full-stack, Full-stack Development, CSS Animations, Cordova, Telegram Bots, Website Data Scraping, Proxies, Scraping, Storybook
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