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CSS Frontend Development HTML5 JavaScript Mobile App Development
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Oleh D.

@olehd6

5,0
4

2,0

2,0

75%

🏆 Senior Full Stack Developer 🏆

$35 USD / hora

・

Bandeira do(a)

Poland (7:51 AM)

・

Entrou em agosto 12, 2025

$35 USD / hora

・

⭐ React ⭐ Next.js ⭐ Python ⭐ AI ⭐ Web Scraping ⭐ Automation (Make, Zapier, n8n) ⭐ 👋 Hi, I am a Senior Full Stack Developer with over 15 years of experience building powerful, scalable, and intelligent applications. My work blends modern frontend engineering, robust backend systems, advanced automation workflows, and AI integration to create fully optimized digital solutions. I help businesses build fast, smart, and automated systems that save time, reduce manual work, and scale effortlessly. 🏆 Technical Expertise 🏆 🔔 Frontend Development - React.js • Next.js (App Router + Pages Router) - TypeScript • JavaScript - Tailwind CSS • Shadcn • Material UI - Component-driven architecture - Pixel-perfect UI 🔔 Backend & API Development - Python (FastAPI, Django, Flask) - Node.js (Express, NestJS if needed) - Scalable REST APIs & GraphQL - Authentication (JWT, OAuth2, roles/permissions) - Background jobs (Celery, Redis, Cron) 🔔 AI Automation & Integrations - AI agents / chatbots (OpenAI, Gemini, Llama) - Document processing (OCR, image-to-text, PDF parsing) - Intelligent workflow automation - Data classification & smart pipelines 🔔 Workflow Automation (No-Code + Low-Code) I build end-to-end automation systems that save hours of manual work. Platforms I Specialize In: - [login to view URL] (Integromat) - Zapier - n8n (self-hosted or cloud) - Webhooks, API integrations, custom modules - CRM automations (HubSpot, Zoho, Pipedrive) - Email, SMS, WhatsApp, Slack automations - Google Workspace automation (Sheets, Docs, Gmail) - Multi-step workflows with conditions and branching Automation + AI + custom APIs = complete intelligent systems. 🔔 Web Scraping & Data Extraction - Selenium • Playwright • Scrapy • BeautifulSoup - Bypass protections, rotating proxies - E-commerce, directory, job boards scraping - Data cleaning & structuring (CSV, JSON, SQL) - Real-time scrapers & scheduled jobs - Integration with automation tools (Zapier/Make/n8n) 🔔 Database Engineering - PostgreSQL • MySQL • MongoDB - Database modeling, optimization, indexing - Large-scale schema design If you're looking for a developer who can deliver frontend, backend, AI, automation, and scraping all in one place, I’m ready to help.

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No prazo

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No orçamento

100%

Índice de aceitação

83%

Freelancer Javascript Developers Poland
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Portfólio

Portfólio

13612342
I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

13612326
Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

13612298
I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

13612221
I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

13612342
I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

I worked as a Frontend Developer at Minami.ai, leading the development of a modern, high-performance, and responsive web application. My goal was to create a seamless user experience while ensuring the platform was optimized for speed, accessibility, and scalability. The frontend was built using Astro, leveraging its island architecture to deliver optimized loading times by rendering static HTML and selectively hydrating interactive components, improving performance and SEO. I used Tailwind CSS to implement utility-first, responsive designs and maintainable code, ensuring consistency across devices and screen sizes. For interactive components, I integrated Headless UI, allowing fully accessible, customizable elements styled with Tailwind CSS. This improved usability and adherence to accessibility standards, including keyboard navigation and screen readers. Key contributions: - Developed a high-performance, SEO-friendly frontend with Astro. - Built responsive, mobile-first layouts us

Frontend Developer – Minami.ai

13612326
Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

Worked as a Frontend Developer at Descript, building a fast, responsive web app using Next.js, with Builder.io for dynamic content management and Emotion for styling. Deployed and optimized with Nginx for performance and reliability. This project showcases modern frontend development, headless CMS integration, and production-ready web applications.

Frontend Developer at Descript

13612298
I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

I built GetEndlss, an influencer marketing platform designed to make campaign management effortless for brands and agencies. I handled the full-stack development, creating a sleek, fast, and responsive frontend using Next.js, paired with Sanity CMS for flexible, dynamic content management. The platform enables users to discover influencers, manage campaigns, track performance, and scale collaborations efficiently. I focused on delivering high performance, seamless UX, and scalable architecture, ensuring the app runs smoothly and is easy to maintain. This project demonstrates my ability to combine modern web technologies and CMS integration to create practical, real-world solutions that meet business needs.

Full-Stack Web Developer – GetEndlss

13612221
I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

I built Image.art, a web app that lets users create high-quality images using AI. I handled the entire project, from design and development to deployment and optimization. For the frontend, I used Next.js and Tailwind CSS to make the site fast, responsive, and visually appealing. Users can easily enter prompts and get unique AI-generated images almost instantly. On the backend, I used Node.js to connect the app with AI services, ensuring smooth performance and reliable results. Highlights of my work: - Developed the full-stack platform from scratch. - Integrated AI for real-time, high-quality image creation. - Built an intuitive, user-friendly interface. - Optimized the app for performance, scalability, and maintainability. This project shows my ability to combine modern web development with AI technology, delivering a platform that’s both innovative and easy to use.

Lead Developer – AI Image Generation

5.0 · 4 Avaliações
Avaliações
Avatar do Usuário

MS Power App for Visitor Management Systm, storing data in Sharepont List - Need this done today if possible. Only apply if you have done this project before - no time wasters. • £100 GBP

The project is not completed according to the dispute

Claire F.

@blenki101

•

Bandeira do(a)

Barnard Castle, United Kingdom

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há 3 meses

Compartilhar

Avatar do Usuário

Next.js Sidebar Bug Fix • $30 USD

Great work! Delivered fast and exactly what I needed. Clean code, good communication, and very professional. Will hire again!

Jason B.

@jasonb441

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Bandeira do(a)

New York, United States

•

há 4 meses

Compartilhar

X

Android Drop Claim Automator • $1 USD

fast work, will work again

Pavlo S.

@Xhebwvwzuzbbwbwb

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Bandeira do(a)

Sheptytskyi, Ukraine

•

há 5 meses

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Custom Card Swiper in SolidJS (with MotionOne Animations) • $65 USD

Working with Oleh was a great experience! He built the custom card swiper exactly how I wanted — smooth, responsive, and beautifully animated. Communication was easy, and he delivered everything on time. I’d definitely love to work with him again on future projects!

Lefteris G.

@eleftdg

•

Bandeira do(a)

Kings County, United States

•

há 5 meses

Compartilhar

Educação

Bachelor's degree in Computer Science and Information Systems

2002 - 2006

•

4 anos

Bandeira do(a)

Poland

2002 - 2006

•

4 anos

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