Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Aleh Siarhey, a full-stack developer based in Białystok, Poland. I specialize in building robust web apps using React, Node.js, Angular, and Vue.js, with a focus on clean architecture and scalable UI. With 7+ years of experience and a track record of high-traffic projects (including apps with 800k+ monthly users), I’m a quick learner who thrives in collaborative teams and stays up-to-date with the latest industry trends.…Hi, I’m Aleh Siarhey, a full-stack developer based in Białystok, Poland. I specialize in building robust web apps using React, Node.js, Angular, and Vue.js, with a focus on clean architecture and scalable UI. With 7+ years of experience and a track record of high-traffic projects (including apps with 800k+ monthly users), I’m a quick learner who thrives in collaborative teams and stays up-to-date with the latest industry trends.

Aleh Siarhey

Full Stack Developer, Front-End Developer, Back-End Developer, +3





Hi, I’m Aleh Siarhey, a full-stack developer based in Białystok, Poland. I specialize in building robust web apps using React, Node.js, Angular, and Vue.js, with a focus on clean architecture and scalable UI. With 7+ years of experience and a track record of high-traffic projects (including apps with 800k+ monthly users), I’m a quick learner who thrives in collaborative teams and stays up-to-date with the latest industry trends.…Hi, I’m Aleh Siarhey, a full-stack developer based in Białystok, Poland. I specialize in building robust web apps using React, Node.js, Angular, and Vue.js, with a focus on clean architecture and scalable UI. With 7+ years of experience and a track record of high-traffic projects (including apps with 800k+ monthly users), I’m a quick learner who thrives in collaborative teams and stays up-to-date with the latest industry trends.

Available to hire

Hi, I’m Aleh Siarhey, a full-stack developer based in Białystok, Poland. I specialize in building robust web apps using React, Node.js, Angular, and Vue.js, with a focus on clean architecture and scalable UI.

With 7+ years of experience and a track record of high-traffic projects (including apps with 800k+ monthly users), I’m a quick learner who thrives in collaborative teams and stays up-to-date with the latest industry trends.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Polish

Beginner

Russian

Fluent

Belarusian

Advanced

Work Experience

Front-end developer at IdeaSite

May 1, 2019 - October 2, 2025

Developed responsive web interfaces and features using React and related tools; collaborated with design and backend teams; implemented UI components and state management; ensured cross-browser compatibility.

Front-end developer at Techvice LLC

January 1, 2020 - October 2, 2025

Enhanced UI/UX, migrated legacy code to modern frameworks, built reusable components, and integrated with REST APIs and real-time features.

Front-end developer at INTEXSOFT

July 1, 2020 - October 2, 2025

Worked on ReactJS + Node.js project; implemented front-end modules, optimized performance, integrated with API, and participated in code reviews.

Front-end developer at SoftTeco

August 1, 2020 - Present

Developed features and UI components for multiple projects, improved performance, and collaborated with cross-functional teams.

Full-stack developer at SoftTeco

December 1, 2024 - Present

Contributed to backend and frontend tasks, implemented APIs and front-end integrations; participated in architecture discussions.

Full-stack developer at SeatMaps

October 1, 2024 - Present

Developed seat map features and UI integrations for a high-traffic travel platform; collaborated with design and product teams.

Front-end developer at IdeaSite

May 1, 2019 - October 2, 2025

Developed and maintained frontend features for a high-traffic platform, implementing responsive UI with React, JavaScript, HTML/CSS; collaborated with UX and backend teams.

Front-end developer at Techvice LLC

January 1, 2020 - October 2, 2025

Built customer-facing UI components and features using modern JS frameworks; optimized performance and accessibility.

Front-end developer at INTEXSOFT

July 1, 2020 - October 2, 2025

Implemented UI features and integrations with backend services, contributing to scalable web apps.

Front-end developer at SoftTeco

August 1, 2020 - Present

Led frontend development for multiple projects, implemented components, state management, and testing strategies.

Full-stack developer at SoftTeco

December 1, 2024 - Present

Expanded responsibilities to full-stack work, building client and server-side features, APIs, and data flows.

Full-stack developer at SeatMaps

October 1, 2024 - Present

Developed seat map UI library and related tools to enable embedding in React apps; contributed to large-scale travel platform used by hundreds of thousands monthly.

Front-end developer at IdeaSite

May 1, 2019 - October 2, 2025

Developed and maintained modern web applications using React, Angular, and Vue.js; implemented responsive UI with CSS/SASS; collaborated with backend and design teams to deliver high-quality features.

Front-end developer at Techvice LLC

January 1, 2020 - October 2, 2025

Built scalable front-end solutions, integrated RESTful services, and implemented reusable components to speed up development cycles across multiple products.

Front-end developer at INTEXSOFT

July 1, 2020 - October 2, 2025

Contributed to client projects with modern JS frameworks, implemented UI/UX improvements, and collaborated with design teams to ensure pixel-perfect interfaces.

Front-end developer at SoftTeco

November 30, 2024 - October 2, 2025

Delivered feature-rich front-end solutions, optimized performance, and mentored junior developers across several applications.

Full-stack developer at SoftTeco

December 1, 2024 - Present

Expanded responsibilities to include back-end work, implementing API endpoints with Node.js/Express, and integrating front-end with server-side logic.

Full-stack developer at SeatMaps

October 1, 2024 - Present

Developed and maintained a React/Node-based seat map platform, focusing on performance, accessibility, and seamless UX for large-scale user traffic.