Olga S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I am a Front-End Developer with over 6 years of experience in React.js development. During my career, I’ve acquired not only UI development skills, but also implemented complex logic and functionality in JavaScript. I follow SOLID and DRY principles in my work and focus on usability, performance, and up-to-date practices. Invite me for an interview if you feel like I’m the right person to turn your ideas into reality. TECH STACK ✅ PROGRAMMING LANGUAGES: JavaScript, TypeScript, HTML/CSS ✅ FRAMEWORKS/LIBRARIES: React.js (hooks, Router, reselect), Redux, Bootstrap ✅ PREPROCESSORS: Sass (SCSS), Pug, Styled-component ✅ TESTING TOOLS: Jest ✅ OTHER: AJAX, BEM, pixel perfect, Webpack, Babel PORTFOLIO ✅ Project: Business website Description: Business website for personal development. Duties: - Implementation of logic in Next.js and styled-components - Translation of UI/UX design wireframes to actual code in reusable components - Writing Jest tests - Creating UIs from scratch, according to the Figma designs. - Integration of the applications with the back-end. - Development of CSS styling and animations. - Implementation of interactive user interfaces and business logic. Tech stack: Next.js, Redux, React Router v.5, Redux-thunk. ✅ Business websites on Pug: Business websites for B2B companies with news pages, pages for promotions, polls, chats, etc. ✅ Website for the association of museums: Website with non-standard scrolling behavior, effects, and visitors` routes of movement. LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency specializing in FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, Medical Insurance and Healthcare, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. INVITE ME FOR AN INTERVIEW If you feel I’m a good fit for your project, let's discuss how I can help streamline your business’s growth! 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, EV Charging, Automotive, Logistics, Delivery, Food Ordering, FinTech, Banking, Healthcare, Insurance, Betting, Gambling, Data Scraping, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, Selenium, UI/UX Design, User Interface (UI), User Experience (UX), Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, REST API, FastAPI, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).