Hire the Best Proto.io Specialists
in Ukraine

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Olha V.

Kyiv, Ukraine

$40/hr
5.0
32 jobs

Shipped UI is the part of a product users interact with directly — and one broken state or rushed implementation can undermine trust faster than a missing nice-to-have feature. I’m a Frontend Developer with 10+ years of experience and strong design fluency: comfortable prototyping directly in code and understanding what makes an interface not only functional, but intuitive and polished for the people using it. I turn designs, prototypes, ideas, and already-live-but-messy interfaces into production-ready UI that holds up under real complexity. I typically work with clients in two ways: 🔧 Working With an Existing Interface Auditing, fixing, and evolving what’s already live — inconsistent components, broken edge cases, accessibility gaps, and scalability issues, resolved and shipped, not just reported. This also covers redesigns, template customization, and extending an existing product with new features without breaking what’s already there. 🏗️ Building an Interface From Scratch Turning a Figma file or prototype into production-ready UI, or working directly from a rough brief when there’s no formal design, filling the gaps as I go. Includes complex, data-heavy, and AI-driven product workflows. 💼 Why it matters for the business • Maintain live quality: Ship fixes and updates cleanly without breaking existing layouts or creating UI technical debt. • Keep momentum: Build and launch new features even when detailed design specs aren’t available yet. • Fewer support issues: Build intuitive UI flows that reduce user confusion and customer support overhead. • End-to-end execution: Turn anything from an early product idea or rough brief to a Figma design into production-ready frontend UI. 🛠️ I can also help with • Design Systems & Tokens: Customizing and extending existing component libraries to fit your product’s specific needs. • UX Edge Cases: Designing loading, empty, error, and partial-data states upfront, so the app handles real-world data gracefully. • AI-Generated UI Code: Reviewing and refactoring AI-generated frontend code for maintainability, consistency, and production use. • Responsiveness: Implementing UI that scales naturally across mobile, tablet, and desktop breakpoints. ⚙️ Technical expertise React • TypeScript • JavaScript • HTML • CSS Material UI / MUI X • Component Libraries • Design Systems • Design Tokens Webpack • Vite • REST APIs • GraphQL Zustand • React Context • Redux Responsive UI • Accessibility • Complex Multi-step Flows • Data-heavy Interfaces Git • GitHub • Figma 🚀 Let’s work together I work independently or embedded in product/design/engineering teams, using AI tools to move faster but without cutting corners on quality. If you’re building a complex web product, improving an existing UI/UX, or need someone who can own the bridge between design intent and final user-facing quality — feel free to reach out 🤝

  • React
  • TypeScript
  • Front-End Development
  • JavaScript
  • Responsive Design
  • CSS
  • HTML
  • Material UI
  • Figma
  • Design-to-Code
  • UX & UI
  • Performance Optimization
  • Code Refactoring
  • REST API
  • SCSS
  • User Interface Design
  • Web Design
  • Web Accessibility
  • SaaS
  • Dashboard
Alina N.

Kyiv, Ukraine

$60/hr
5.0
15 jobs

I’m a Startup Partner combining product strategy, UX/UI design, and AI-powered workflows. 🤝 Clients from USA 🇺🇸, Canada 🇨🇦, UK 🇬🇧 and Europe 🇭🇷🇺🇦 👩🏻‍💻 7+ years in design & development 🥇TOP RATED PLUS FREELANCER 💎 100% Job Success MY TOOLS & AI WORKFLOW: 🎨 Figma, Figma AI, Claude Design — UI/UX design, design systems, interactive prototypes 🤖 Claude Code — frontend implementation, code generation, technical validation 🧠 ChatGPT — product research, UX ideation, feature planning, copywriting, brainstorming ⚛️ React, HTML, CSS, JavaScript, TypeScript 🧩 Material UI, Ant Design, HeroUI PRODUCT EXPERIENCE: 🔸 AI-powered products 🔸 SaaS platforms 🔸 Cybersecurity 🔸 Fintech & trading 🔸 Insurance 🔸 Education HOW I HELP: 🔹 Product discovery & idea validation 🔹 UX research, wireframing 🔹 SaaS platforms & AI product design 🔹 Web & mobile application design 🔹 Landing pages 🔹 Design systems & developer-ready Figma files 🔹 Frontend development (React) when needed

 🚀 Need a full product team? I also run A.sential, a startup-focused agency combining product design, development, DevOps, and business analysis. As your product grows, we can support the entire journey If you're looking for a partner who thinks beyond UI and helps shape better products, I'd love to hear about your idea. 🤝 Let's build something great together! ---------------------------------------- Keywords: Startup Partner, Product Design, Product Strategy, UI/UX Design, UX Design, UI Design, SaaS Design, AI Products, AI Design, Dashboard Design, Web Application Design, Mobile App Design, Landing Page Design, Design Systems, Figma, Figma AI, User Experience, User Interface, UX Research, Wireframing, Prototyping, Product Discovery, MVP Design, Startup, B2B SaaS, AI UX, React, Frontend Development, Material UI, Ant Design, HeroUI, HTML, CSS, JavaScript, TypeScript, Responsive Design, Product Thinking, Web Design, Mobile Design

  • Figma
  • Web Design
  • Startup Company
  • UX & UI
  • UX & UI Design
  • Landing Page
  • SaaS
  • SaaS Development
  • React
  • TypeScript
  • JavaScript
  • Web & Mobile Design Consultation
  • Web Application
  • Web Development
  • Mobile UI Design
  • Design Mockup
Kostiantyn Z.

Kyiv, Ukraine

$100/hr
5.0
1 jobs

Senior AI Builder | Lead Fullstack Architect | Technical Founder with 12+ years of experience building high-load SaaS ecosystems, AI-augmented development, and rapid product scaling. I bridge the gap between complex engineering and business profitability. My "Builder Mindset" is defined by full-cycle ownership: from zero-to-one architectural vision to high-velocity AI-driven delivery. I leverage agentic workflows (Cursor, Claude Code) and automation (n8n) to deliver production-grade software at double the industry standard pace. I don't just write code; I engineer competitive advantages. CORE COMPETENCIES ● Engineering Strategy: High-load Architecture, Microservices, Zero-to-one design, CI/CD, Cloud Infrastructure. ● AI-Native Execution: AI-assisted development (Cursor, Claude Code, v0), Prompt Engineering, Workflow automation via n8n. ● Product & Ownership: Founder-level agency, Stakeholder communication, Unit economy optimization, Crisis intervention. ● Fullstack Mastery: React/Next.js (App Router), TypeScript (Advanced), Node.js, Real-time systems, Mobile bridges.

  • Product Management
  • Artificial Intelligence
  • Microservice
  • CI/CD
  • Cloud Engineering Consultation
  • n8n
  • Full-Stack Development
  • React
  • Next.js
  • TypeScript
  • Node.js
  • Real-Time Computing
  • SaaS Development
  • CircleCI
  • Claude
Serhii K.

Zaporizhzhya, Ukraine

$45/hr
5.0
6 jobs

👋 Hi Upworkers, Welcome to my profile page. With over a decade of project management experience in various domains, I specialize in propelling both greenfield and brownfield software projects, ensuring they are innovative, responsive, and secure, irrespective of their complexity. 🎯 My project management strengths: - Collaborative scope & goal definition with stakeholders. - Resource allocation – including personnel, budget, and equipment. - Risk management with effective mitigation strategies. - Continuous progress monitoring & status communication. - Ensuring timely delivery while upholding quality standards. - Proficiency in Agile and Waterfall methodologies and strict adherence to relevant regulations. 🌍 Our team: Our seasoned and carefully vetted experts hail from Ukraine and Eastern Europe, upholding the highest standards in software development. 🔍 Our team's core expertise: 📌Web Backend: Node.js, NextJS, Express, Python, C++, .NET Core, Blazor, ASP.NET Core, PHP, WordPress, Go, Java, Kotlin 📌Web Frontend: Angular, React, Vue, Vuetify, Nuxt, Blazor 📌Mobile Development: Xamarin, Swift, Objective-C, C++, Kotlin, Java, Flutter, React Native, 📌Desktop Development: C#/.NET, Xamarin, C++, wxWidgets, Qt 📌UI/UX: User Interface Research, User Scenarios, User Interface Design, Usability Testing, Wireframing, Prototyping, UX Research, UX Writing, App design, web design, Visual Communication, UI/UX audit 📌Branding: logo design, brand book, custom graphics, brand identity 📌AR/VR: Unity, AR Foundation, AR Kit, AR Core, Kinect, Computer Vision 📌3D Modeling, Animation, Video Montage: Blender, Metahuman, Cinema 4D, Speedtree, DaVinci Resolve, Marmoset 📌Blockchain: Web3.js, Solidity, C++, Go, Rust 📌Embedded: C, C++, Python: 📌Cloud Platforms: AWS, Google Cloud, Azure, Heroku, Docker, DigitalOcean. Feel free to contact me with any questions or need additional information.

  • Web Design
  • Node.js
  • Angular
  • React
  • Unity
  • AR & VR Development
  • Web Development
  • Mobile App Development
  • iOS
  • Android
  • API
  • UX & UI
  • Mobile App Design
  • Next.js
  • NestJS
  • 3D Modeling
  • SaaS Development
  • IT Consultation
Olena T.

Kharkiv, Ukraine

$50/hr
5.0
210 jobs

I’m a Senior Product Designer focused on mobile apps, AI-powered products, and complex SaaS interfaces. I’ve completed more than 190 projects on Upwork. Much of my work involves existing products: untangling difficult workflows, improving usability, and preparing clear Figma files for development. My work includes: • Mobile app design and redesign • UX for AI assistants and agent-based products • SaaS dashboards and data-heavy interfaces • User flows and interactive prototypes • Design systems and reusable components • Close collaboration with developers during implementation For AI products, I focus on practical questions: what the agent is doing, what the user can control, when confirmation is required, and what happens when something goes wrong. Send me your current product, prototype, or requirements. I’ll help you identify what needs to be improved.

  • Figma
  • Mobile App Design
  • SaaS
  • User Interface Design
  • Mobile UI Design
  • UX & UI
  • Prototype Design
  • UX Wireframe
  • Mobile App Redesign
  • iOS
  • Artificial Intelligence
  • Conversational User Interface
  • Chatbot Flow Design
  • Conversational AI
Anton B.

Kropyvnytskyy, Ukraine

$50/hr
5.0
10 jobs

Hi there 👋 I am glad to present the ONIX team - open-minded and innovation-oriented developers and designers👨‍💻 Do you want to create an app or have a cool idea for digital service? Our developers and designers are open to cooperating - to turn your idea into a profitable and innovative app, site, or platform. Our team made many great projects run successfully for hundreds of clients and you can be the next lucky guy. 😎 ᴏᴜʀ ᴛᴇᴀᴍ ᴇxᴘᴇʀᴛɪꜱᴇ ɪꜱ ɪɴ: ✔️ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Python, Java, Ruby, PHP ✔️ 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: JavaScript, React, Angular, Vue.js, ✔️ 𝐌𝐨𝐛𝐢𝐥𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Swift, Objective-C, Kotlin, Java, Flutter, React Native ✔️ 𝐔𝐈/𝐔𝐗 𝐃𝐞𝐬𝐢𝐠𝐧: wireframes; prototypes; icon, logo, and theme design ✔️ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞: PostgreSQL, MongoDB, AWS DynamoDB, MariaDB ✔️ 𝐂𝐥𝐨𝐮𝐝 𝐬𝐭𝐨𝐫𝐚𝐠𝐞: AWS, Azure, GCP (Google Cloud Platform), Heroku, DigitalOcean ✔️ 𝐂𝐌𝐒: WordPress, Shopify, WooCommerce, Elementor, Webflow, Strapi, Moodle ✔️ 𝐕𝐑\𝐀𝐑: Unity, Oculus Integration, EasyAr, Maxst, Xzimg, Agora, Zenject, Wowza, LipSync, AVPro, Nakama, Mailerlite, Headjack, Pico VR, Hurricane VR, AVPro Video, ARCore ✔️ 𝟑𝐃: Blender. Maya, Houdini, Zbrush, Substance Painter, Render ᴡʜʏ ᴅᴏ ʏᴏᴜ ᴡɪɴ ɪꜰ ᴄʜᴏᴏꜱᴇ ᴛʜᴇ ᴏɴɪx ᴛᴇᴀᴍ: 🔰 Professional expertise 🔰 Quick and easy start 🔰 Deep expertise in 20+ domains 🔰 Individual approach to each project 🔰 Quality Assurance 🔰 Project accompaniment and development after deploy 🔰 Open mind and out-of-the-box approach for the highest results You are welcome to text me :) We can discuss your project, and I'll do my best to make our cooperation fruitful and successful. Don't hesitate to text me - I'll gladly answer any of your questions: developing process, estimation budget or timeline, our approach, and benefits, etc. Looking forward to hearing from you!

  • React
  • React Native
  • JavaScript
  • Python
  • Objective-C
  • Swift
  • Kotlin
  • Web Development
  • UI/UX Prototyping
  • Vue.js
  • WordPress
  • Front-End Development
  • AR & VR Development
  • Back-End Development
  • Shopify

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