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Vadym K.
$35/hr
100% Job Success
$1M+ earned
Available now
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I am a .NET full stack developer and software architect with 8+ years of experience building scalable web applications using ASP.NET Core, Angular, C#, TypeScript, Microsoft SQL Server, Azure, and modern cloud technologies. Across 35+ projects in defence, renewable energy, fintech, e-commerce, and enterprise SaaS development I have delivered systems that handle real production load, not just demo traffic. What I build as a .NET full stack developer My deepest work is in ASP.NET Core back-end development. I spent years as the lead .NET full stack developer on a platform managing thousands of wind and solar energy installations globally, processing massive volumes of real-time data, building microservices on .NET Core and Azure, and reducing critical downtime incidents by over 40% through improved monitoring and analytics. On another project I built a Loan Origination System in ASP.NET Core that automated the entire loan lifecycle from lead capture to loan issuance, integrating with HubSpot, external CRMs, and RESTful APIs on Microsoft Azure. The client went from manual processing to a fully automated fintech pipeline handling 550+ active applications, cutting processing time by 60%. ASP.NET developer work across enterprise and defence Some of my most complex work as an ASP.NET developer has been in defence and industrial sectors. I modernized a legacy web platform for a company managing 36 high-uptime naval fleet assets, warships that cannot afford downtime. The ASP.NET MVC rebuild reduced manual reporting time by 70% and enabled real-time asset tracking, secure document storage, and streamlined access to sensitive operational data. On another engagement I took over a large workplace management SaaS development project built by a single developer who had left, no documentation, weekly outages, daily hotfixes. I stabilized the ASP.NET Core back-end, eliminated the performance bottlenecks, and reduced unplanned incidents from weekly to zero within two months. ASP.NET Zero and enterprise acceleration ASP.NET Zero is my go-to when enterprise clients need multi-tenancy, role-based permissions, and audit logging without spending the first three sprints on boilerplate. I have used it to accelerate SaaS development on projects in pharma automation, workplace management software, and industrial IoT, cutting initial setup time by 3+ weeks and letting the team focus on actual business logic from day one. On average my clients ship their first production release 30% faster on ASP.NET Zero compared to building from scratch. Full-stack web development across the whole system As a .NET full stack developer I own the entire delivery, ASP.NET Core back-end, Angular or React front-end with clean web design, Microsoft SQL Server and PostgreSQL database design, and Azure infrastructure. I built a Shopify fulfillment tool in ASP.NET Core and React that reduced packing mistakes to zero and cut order processing time by 35%, integrating barcode scanning, inventory management, and connections to 8+ shipping providers. I delivered a fleet management system in .NET Core and Angular handling 1,250+ assets and 845 active rentals simultaneously, with automated reporting that saved operations teams 10+ hours per week. On the front end I work with Angular, React, TypeScript, JavaScript, Next.js, HTML, CSS, Bootstrap, and RESTful API integration, connecting them cleanly to .NET back-ends without creating maintenance nightmares six months later. C# and .NET developer engineering that goes deep Back-end development across 8 years as a .NET developer means I have seen what breaks under real load. I cut a US e-commerce platform's page load time from 8 seconds to 2, directly contributing to a 2x increase in sales. I optimize Microsoft SQL Server and PostgreSQL queries, regularly reducing query execution times by 60-80%, design database schemas that support complex reporting, and build API integration layers connecting .NET systems to CRMs, ERPs, payment gateways, and third-party platforms. I work with Node.js for event-driven services, TypeScript to keep large codebases maintainable, and Python or PHP when projects need scripting layers alongside the core .NET stack. For web development infrastructure I use Microsoft Azure and Amazon Web Services, Docker containers, microservices architecture, and CI/CD pipelines that reduced deployment time by 50% for several enterprise clients. Why clients come back I have worked with clients in Germany, the USA, Australia, the UK, Norway, Denmark, and the Netherlands across renewable energy, defence, fintech, e-commerce, and industrial IoT. What stays the same: I ask the right questions before writing the first line of code, flag problems early, and deliver .NET full stack applications that work in production, not just in development. If you are scaling a SaaS product, modernizing a legacy system, or need a .NET full stack developer your team can build on, let us talk.
Vadym K. has worked .
Eastoner
Associated with
Eastoner
$500K+
earned
Michael S.
$20/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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🏆 Top 1% of Experts on Upwork – Top Rated Plus 💎 10+ years of experience as Full Stack Developer | React Node.js Developer | Python Full Stack Developer ⭐ Experienced in building scalable web applications, SaaS, MVPs, any custom and AI-powered solutions. ⭐⭐⭐⭐⭐ "Working with Mykhailo and Admiral Studios was an outstanding experience. They developed our MVP for launch and exceeded expectations in every way. Their technical depth, communication, and ability to execute complex ideas made the process smooth and highly effective." — Alex D. | CEO With 10+ years of experience as a full stack developer and React Node.js developer, I've delivered 50+ projects helping businesses launch reliable products and improve existing systems. As a JavaScript developer and React Node.js engineer, my focus is scalability, maintainable code, fast performance, responsive design, and secure product delivery. I'm a full stack developer specializing in scalable web applications, SaaS platforms, MVPs, API integration, and AI-powered digital products - combining strong front-end development with secure back-end development. Whether you need a software developer for custom product builds, AI integration, or a complete platform upgrade, I deliver end-to-end solutions designed for performance and growth 🚀 🔹 What I Do Best ✅ Full-Stack Development - React Node.js | React Node.js developer | React Next.js - JavaScript, TypeScript, HTML, CSS, CSS 3, Bootstrap, Tailwind CSS ✅ React Node.js Development - SaaS platforms, admin panels, dashboards, portals, and business systems | fullstack developer Node.js | backend Node.js ✅ API Development & API Integration - REST API, GraphQL, authentication, payments, Twilio API, Facebook Conversion API, Twitter API, third-party integrations | API developer ✅ AI Developer Services - AI integration, AI chatbot systems, AI model integration, NLP workflows, machine learning, intelligent automation ✅ MERN Stack Developer - MongoDB, ExpressJS, React Node.js, Node.js | MERN | React Native MERN | MEAN stack developer ✅ Mobile App Development - React Native | React Native mobile apps with scalable API architecture ✅ Front-End Development - React developer | React JavaScript | Vue.js | Next.js | Supabase | Redux ✅ Cloud & DevOps - AWS, Docker, Kubernetes, Git | Software development workflows ✅ UI/UX Design - Figma, web design, responsive design 🚀 Industries Covered E-commerce · SaaS · Real Estate · Healthcare · Education · FinTech · AdTech · LegalTech · EdTech · Travel · Logistics · Retail · Marketplaces · Startups · Enterprise · Media · HR & Recruitment · Insurance · Gaming 💡 Projects I'm Proud Of 🔹 AI SaaS Platform - Full Stack Developer React Node.js Delivery ✔ Built scalable SaaS product using React Node.js, Express.js, PostgreSQL, GraphQL as full-stack developer ✔ Added AI integration: analytics automation and machine learning features ✔ Increased engagement by 45% 🔹 E-commerce Platform - Full Stack Web Developer Solution ✔ Developed storefront with React Node.js, MongoDB, API integration as MERN stack developer ✔ Improved load speed by 40% ✔ Delivered secure checkout and inventory systems 🔹 Analytics Dashboard & Admin panel - Full Stack Node.js Developer Project ✔ Built dashboard using Python, Django, React, Redux | Python backend + front-end development ✔ Integrated AI developer features: AI chatbot and data scientist-grade analytics ✔ Reduced API response time by 35% 🚀 Why Work With Me? ✔ 10+ years as full stack developer and React Node.js engineer ✔ 50+ projects as fullstack developer across web developer and software developer roles ✔ Strong front-end development + back-end development ownership ✔ Full-stack developer specializing in AI developer services and AI integration ✔ Long-term support: MVP to scaling - full-stack development at every stage ✔ Available as backend developer | Node.js developer | React developer | JavaScript developer | frontend developer 🔹 Tech Stack JavaScript · TypeScript · React · React.js · React Native · Node.js · ExpressJS · Next.js · Vue.js · FastAPI Redux · MongoDB · PostgreSQL · MySQL · SQL · GraphQL · Supabase · REST API · HTML · CSS · CSS 3 · Bootstrap · Tailwind CSS · Figma · AWS · Docker · Kubernetes · Git · MERN Stack 📩 Ready to build your next web application, SaaS, or AI-powered product? As your dedicated full-stack developer, I'm here to deliver. Send me an invite or message me directly - let's get started! 🚀 📆 Last Updated: 30/06/26
Michael S. has worked .
Admiral Studios 🏆 Award-Winning Dev & Design & SEO Agency
Associated with
Admiral Studios 🏆 Award-Winning Dev & Design & SEO Agency
$500K+
earned
Yuri N.
$55/hr
100% Job Success
$400K+ earned
Available now
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👋 My name is Yuri — I'm Upwork's #1 iOS developer in Ukraine. I'm the founder and lead engineer at Helicon, an award-winning mobile development team. Together, we bring decades of experience in building software with a mission of delivering exceptional results at an impressive pace. Are you looking to create an app and need an expert developer who speaks fluent English? I specialize in: — iOS development (UIKit, SwiftUI) — macOS development (Cocoa, SwiftUI) — Vision Pro, Apple Watch, and Apple TV apps — Product management & expert advice for software projects. At Helicon, we are skilled in most of the well-known Swift frameworks as well as third-parties. See the full list below: — UI Frameworks: SwiftUI, UIKit, Combine, RxSwift, The Composable Architecture (TCA) — Backend & Auth SDKs: Firebase, AWS Amplify, Supabase Swift, Auth0, Appwrite — 3D Frameworks: RealityKit, ARKit, SceneKit, Model I/O, Quick Look — Networking Libraries: URLSession, Alamofire, Moya, Apollo iOS, gRPC — Image & Animation Libraries: Kingfisher, SDWebImage, Nuke, Lottie, AVFoundation — Data Persistence Libraries: SwiftData, Core Data, Realm, GRDB, KeychainAccess — Analytics & Monitoring Tools: Firebase Analytics, Mixpanel, Amplitude, Sentry, Branch — Payments & Subscription SDKs: StoreKit, RevenueCat, Adapty, Stripe, Paddle — Developer Tools & Dependency Managers: Swift Package Manager, CocoaPods, Carthage, SwiftLint, SnapKit — Device & Platform Frameworks: CoreLocation, MapKit, HealthKit, CoreBluetooth, WidgetKit I can also assist you with app distribution, marketing, and launch using: — App Store Connect — Apple Developer Platform — Apple Search Ads — Meta Ads Manager (f.k.a. Facebook Ads Manager) My team has first-hand expertise in applying AI models like Claude Opus and GPT-5 to the mobile development workflow, allowing us to offer a great turnaround time for your project without ever sacrificing the human touch. Advanced English proficiency is a requirement for every developer working at Helicon. We also communicate freely, Ukrainian, Polish, and Russian. Don’t hesitate to send me a quick message and we will go over your idea in detail over a video call or through Upwork chat!
Yuri N. has worked .
Helicon
Associated with
Helicon
$100K+
earned
$50/hr
100% Job Success
$40K+ earned
Offers consultations
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🥇 𝗧𝗢𝗣 𝟭𝟬% 𝗪𝗲𝗯𝗗𝗲𝘃 🕒 𝟮𝟭𝟬𝟬+ 𝗛𝗼𝘂𝗿𝘀 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 ✅ 𝟭𝟬+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗶𝗻 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀 | 𝗦𝗵𝗼𝗽𝗶𝗳𝘆 | 𝗔𝗣𝗜 | 𝗲𝗖𝗼𝗺𝗺𝗲𝗿𝗰𝗲 | 𝗟𝗮𝗻𝗱𝗶𝗻𝗴 𝗽𝗮𝗴𝗲 ✅ 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝟱𝟬𝟬+ 𝗙𝗮𝘀𝘁 & 𝗛𝗶𝗴𝗵 𝗰𝗼𝗻𝘃𝗲𝗿𝘀𝗶𝗼𝗻 𝘄𝗲𝗯𝘀𝗶𝘁𝗲𝘀 ⭐𝗥𝗮𝘁𝗲𝗱 𝟱/𝟱 | 💯 𝗙𝗿𝗲𝗲 𝗯𝘂𝗴 𝗳𝗶𝘅 | ❤️ 𝗣𝗼𝘀𝘁-𝗹𝗮𝘂𝗻𝗰𝗵 𝘀𝘂𝗽𝗽𝗼𝗿𝘁 I help companies build and scale e-commerce stores, corporate sites, and custom web solutions that increase sales and save time. What I can do for you: - Full Shopify store setup & customizations (themes, apps, API) - WordPress & WooCommerce development (speed, security, SEO) - Laravel & API integrations (Stripe, Wallee, custom automations) - Performance optimization (Core Web Vitals, fast loading) - Total custom solutions - Ongoing support and audits Why work with me? - AI-driven workflow saving 50% costs and doubling speed. - Free bug fix. - Post-launch support. - 10+ years of experience in web development. - 50+ successful projects for clients in the US, UK, and EU. - Always on time, transparent communication, long-term reliability. Let’s talk about your project — I’ll help you launch or improve your website so it brings measurable results.
BinarGear
Associated with
BinarGear
$600+
earned
Yevhen T.
$30/hr
100% Job Success
$70K+ earned
Available now
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Hi 👋🏻 I'm a Senior Full Stack Developer with over 10 years of experience building SaaS platforms, AI-powered applications, custom web applications, MVPs, automation systems, REST APIs, and scalable cloud-based software solutions. I help startups, founders, and businesses turn ideas into reliable products that scale. Whether you need a new SaaS platform, AI integration, custom backend development, API architecture, or modernization of an existing application, I can take ownership from planning to deployment. What I can help you with💻 ✅ SaaS Development & MVP Development ✅ Custom Web Application Development ✅ AI Integration & AI-Powered Applications ✅ Backend Development (PHP, Laravel, Node.js) ✅ Frontend Development (React, Next.js, Vue.js) ✅ REST API Development & Third-Party Integrations ✅ Automation Systems & Business Process Automation ✅ Performance Optimization & Application Scaling ✅ Cloud Deployment & DevOps Core Tech Stack🛠️ ▪️Backend: PHP, Laravel, Node.js, NestJS, CodeIgniter ▪️Frontend: React, Next.js, Vue.js, Nuxt.js, JavaScript, TypeScript ▪️Markup & Styling: Tailwind CSS, Bootstrap, Bulma, HTML5, CSS ▪️Databases: PostgreSQL, MySQL, Redis, MongoDB, SQLite ▪️AI & Automation: OpenAI API, Claude API, AI Agents, RAG Systems, LLM Integrations, Workflow Automation ▪️Cloud & DevOps: AWS, Docker, CI/CD, GitHub Actions, DigitalOcean, Vercel, NGINX Why clients work with me🫱🏻‍🫲🏽 ✔ Clean, maintainable, scalable code ✔ Strong software architecture and problem-solving skills ✔ Fast communication and transparent progress updates ✔ Business-oriented approach focused on outcomes ✔ Ownership mindset – I care about the success of your product, not just completing tasks Strategic Consultation🎁 Need help validating an idea, planning architecture, choosing a tech stack, scaling infrastructure, or implementing AI solutions? I provide practical guidance that helps reduce technical risks and avoid costly mistakes before development begins. 📩 Feel free to invite me to your project. I usually respond quickly. If you're looking for a developer who combines strong engineering skills with product thinking and business understanding, let's talk!
Yevhen T. has worked .
Yurii K.
$40/hr
100% Job Success
$100K+ earned
Offers consultations
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Reliable .NET Full Stack Developer for Scalable Web Solutions I’m a .NET Full Stack Developer who delivers production-ready features on time, keeps development cost-efficient, and builds scalable web solutions that grow with your business. As a Senior .NET Full Stack Developer, I design and develop secure, high-performance applications using .NET and Angular, focusing on clean architecture, scalability, and long-term maintainability. I’m a .NET Developer who aligns technical decisions with business goals. Every solution I deliver as a .NET Full Stack Developer is production-ready, reliable, and built for real users. Experience & Credentials Certified Senior .NET Full Stack Developer 8+ years of commercial experience as a .NET Developer and Tech Lead 30+ completed projects on Upwork 100+ delivered projects with my Intelvision team (last 5 years) 100% Job Success | 1900+ hours | $100K+ earned Trusted .NET Developer for Visoplan, ING+, Jincom, Kiflo, and more When clients need a reliable .NET Full Stack Developer, they come back. Core Role: .NET Full Stack Developer As a .NET Full Stack Developer, I handle frontend, backend, APIs, databases, cloud infrastructure, and DevOps. As a .NET Developer, I ensure security, performance, and scalability from day one. I work as: .NET Full Stack Developer for SaaS platforms .NET Full Stack Developer for enterprise systems .NET Full Stack Developer for MVP and startup products .NET Developer for long-term system growth Core Technologies (.NET Full Stack) .NET Full Stack .NET Developer (ASP NET Core, Web API, SignalR) Angular (enterprise SPA, NgRx, RxJS) Node.js (for hybrid architectures when needed) Every project is led by a .NET Full Stack Developer, not a generalist. Backend & Architecture (.NET Developer Expertise) As a .NET Developer, I build backend systems using: RabbitMQ, Docker, Kubernetes, Redis, GraphQL, SignalR, Elasticsearch, Hangfire, MediatR, Quartz NET, Akka NET, Autofac, Dapper, NHibernate, Swagger, FluentValidation, Serilog, NLog This is what separates a .NET Full Stack Developer from a basic coder. Frontend Development (Angular) As a .NET Full Stack Developer, I pair backend power with modern UI development: Angular, TypeScript, SPA, PWA, NgRx, RxJS, Angular Universal, NG-ZORRO, Tailwind CSS, MUI, Ant Design, Lighthouse optimization A strong .NET Developer always delivers a strong frontend. Cloud, DevOps & CI/CD (.NET Full Stack) Azure, AWS, Docker, Kubernetes, GitHub Actions, GitLab CI, Azure DevOps A real .NET Full Stack Developer owns deployment, scaling, and monitoring. Security & Authentication (.NET Developer Focus) Auth0, IdentityServer4, Azure AD B2C, OAuth 2.0, JWT, Azure Key Vault, AWS IAM Security is mandatory for any .NET Full Stack Developer. Business & API Integrations Stripe, Xero, QuickBooks, Microsoft Graph API, Salesforce, SAP, Dynamics As a .NET Developer, I build systems that integrate with real business tools. Testing & Quality xUnit, NUnit, Moq, MSTest, Karma, Jest A professional .NET Full Stack Developer ships tested code. Industry Experience as .NET Full Stack Developer SaaS platforms FinTech systems PropTech and ConTech Logistics and supply chain Custom enterprise solutions Each domain was delivered by a .NET Full Stack Developer with real production experience. Why Clients Choose Me as a .NET Full Stack Developer Deep backend expertise as a .NET Developer Strong Angular frontend delivery Clean architecture and scalability Business-oriented mindset Long-term partnership approach Whether you need an MVP, SaaS, PoC, or enterprise system, you need a .NET Full Stack Developer, not just a coder. Let’s Build Your Product If you’re looking for a reliable .NET Full Stack Developer, an experienced .NET Developer, and a partner who delivers on time, let’s talk. Your product deserves a .NET Full Stack Developer who understands scale, security, and growth.
Yurii K. has worked .
Intelvision
Associated with
Intelvision
$100K+
earned
$35/hr
100% Job Success
$300K+ earned
Available now
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❗️Available for new projects❗️ I’m a Top Rated Full Stack Developer on Upwork with 100% Job Success, focused on React, Node.js, Next.js, TypeScript, SaaS platforms, admin dashboards, APIs, databases, integrations, and production-ready web and mobile products. As a Full Stack Developer, I help startups, product teams, clients like Rand McNally, Magna, Sharpen CX, HÖRMANN Intralogistics turn complex ideas into reliable software. I specialize in fleet management, logistics, location-based SaaS. I work with the Volpis team, a software development company with 9+ years of experience and 100+ completed projects across logistics, fleet, HealthTech, EdTech, marketplaces, SaaS, and enterprise tools. What I bring to your product as a Full Stack Developer: As a Full Stack Developer, I can own the product end to end: architecture, frontend, backend, database structure, API design, integrations, deployment, and long-term scaling. As a React Developer, I build web apps, SaaS dashboards, admin panels, customer portals, CRM systems, booking platforms, and data-heavy interfaces that are clean, fast, and easy to extend. As a Node.js Developer, I design backend systems with stable APIs, authentication, roles, permissions, real-time features, payment flows, notifications, background jobs, and third-party integrations. As a Backend Developer, I focus on business logic, database design, performance, security, data consistency, and maintainable architecture. As a SaaS Developer, I help build MVPs, internal tools, subscription platforms, marketplaces, dashboards, and scalable web applications from idea to production. Selected results from my development work: 100+ completed mobile and web projects Products used by thousands of active users Real-time GPS and location-based systems used in daily operations Mobile apps launched and supported on App Store and Google Play SaaS dashboards that replaced manual workflows Backend systems for maps, tracking, booking, payments, subscriptions, and notifications Enterprise experience where uptime, data consistency, and scalability matter My approach as a Full Stack Developer: Understand product goals, business logic, and technical constraints Choose architecture for current scope and future scaling Build frontend structure with reusable components and predictable state Design backend logic, APIs, database models, and integrations Keep performance, security, maintainability, and testing in mind Prepare the product for deployment, monitoring, release, and future iterations Tools and technologies: Frontend: React, Next.js, TypeScript, JavaScript, HTML, CSS, Tailwind CSS, responsive web design, component architecture, reusable UI components, state management, dashboards, admin panels, SaaS interfaces, customer portals, web apps, and performance-focused frontend development. Backend: Node.js, Express.js, NestJS, REST API, GraphQL API, WebSockets, authentication, authorization, roles, permissions, business logic, background jobs, notifications, payment systems, subscriptions, custom API development, API integration, and real-time functionality. Databases: PostgreSQL, MySQL, MongoDB, Redis, Prisma, relational database design, document-based data models, caching, indexing, data synchronization, reporting logic, and scalable data structure. Cloud and infrastructure: AWS, Heroku, Google Cloud, Firebase, Docker, CI/CD, deployment, server configuration, monitoring, app releases, production support, and performance optimization. Mobile and cross-platform: iOS, Android, Flutter, Kotlin Multiplatform, mobile backend integration, push notifications, offline-first behavior, background location, maps, GPS tracking, and shared business logic. Integrations: Stripe, Apple Pay, Payfort, Firebase, Google Maps, Mapbox, HERE, TomTom, analytics tools, CRM systems, email services, chat, payment gateways, and custom third-party APIs. Clients usually hire me as a Full Stack Developer, Full Stack Web Developer, React Developer, Node.js Developer, Backend Developer, Web App Developer, API Developer, SaaS Developer, or MERN Stack Developer when they need reliable product ownership. I’m useful when your product has complex logic, multiple user roles, dashboards, real-time data, maps, payments, subscriptions, booking flows, integrations, or backend-heavy features. Why hire me as your Full Stack Developer? 9+ years of product development experience through the Volpis team 100+ completed digital product projects Top Rated profile with 100% Job Success on Upwork Strong React, Node.js, Next.js, TypeScript, SaaS, API, and mobile backend experience Experience with logistics, fleet, healthcare, marketplaces, SaaS, and enterprise products Clear ownership and engineering decisions focused on long-term product quality If you’re looking for a Full Stack Developer who can build reliable software, improve existing systems, and turn complex requirements into a scalable product, send me a message or invite me to your project.
Volpis - Mobile and Web Development | UX/UI Design
Associated with
Volpis - Mobile and Web Development | UX/UI Design
$700K+
earned
Vitalii A.
$39/hr
100% Job Success
$900K+ earned
Available now
Offers consultations
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🌟8+ Years Experience | 50+ Projects | 20,000+ Hours | $900K+ Earned | Upwork Top Performer | Flutter Developer | Mobile App Developer I’m a Flutter developer, mobile app developer, full stack developer, and web developer with 8+ years of experience building, fixing, and scaling mobile products for startups and growing companies. My work spans mobile app development, web development, and backend-connected product work, with a strong focus on clean architecture, smooth user experience, reliable delivery, and scalable app development. I’ve worked across Flutter, Flutter Dart, Flutter Firebase, React, React Native, Xamarin developer projects, Xamarin Forms, Xamarin.Forms, .NET MAUI developer builds, Swift developer work, SwiftUI, iOS, Android, iOS developer tasks, iOS Swift, Android developer tasks, Android Kotlin, Kotlin, native app developer projects, AI app development, MVP development, API integration, and cross platform mobile app architecture. I also support teams that need a practical full stack developer who can connect mobile apps with APIs, dashboards, cloud services, and web systems without slowing the project down. That mix of mobile app development and web development lets me work across the full product, not just one part of it. On Upwork, I’ve delivered 50+ projects, earned $800K+, and worked 20,000+ hours helping clients launch MVPs, modernize old apps, fix unstable codebases, and move products into production. That experience taught me how to balance speed with quality, especially when a project needs to ship quickly but still be stable enough for real users. It also taught me how to work with different teams, different product stages, and different technical constraints without losing momentum. For new products, I help with MVP development from concept to launch. For existing products, I step in to improve architecture, refactor weak areas, and make the app easier to maintain and scale. If you’re building a cross platform mobile app, I can help choose the right direction between Flutter, React Native, .NET MAUI, Xamarin migration, or native app development depending on the product goals, timeline, and long-term plan. I focus on making those choices practical, not trendy, so the app can grow without becoming harder to manage. I’m also a strong fit for AI app development projects where the product needs more than a basic interface. That might mean smart workflows, automated actions, backend logic, or API integration that connects the app to real business systems. In those projects, I pay close attention to stability, data flow, security, and the user experience, because a useful feature only matters if it works reliably in production. 💡 Areas I specialize in - SaaS and startup MVP development - from idea to production-ready MVP. - Cross platform mobile app architecture - Flutter, React Native, and .NET MAUI. - App modernization and legacy migration - Xamarin to .NET MAUI, Flutter, or React Native. - API integration and backend connectivity - for apps that need stable data flow and real-time features. - AI app development and product automation - for teams that want smarter app experiences. - Continuous delivery, refactoring, and codebase optimization - to keep existing products moving forward. - Mobile app development for iOS and Android - with a focus on stability, performance, and usability. - Full stack developer support - when mobile work needs web, API, or backend coordination. - Native app developer support - when the project needs platform-specific quality and performance. - React Native developer support - for teams already working in JavaScript-based mobile stacks. - Swift developer and iOS developer support - for polished Apple ecosystem apps. - Android developer support with Kotlin - for strong native Android performance. - Flutter developer support - for fast cross platform mobile app delivery. - Xamarin developer support - for legacy apps that need modernization or migration. - .NET MAUI developer support - for teams moving toward a modern Microsoft stack. - Cross platform mobile app delivery - when one codebase needs to support iOS and Android efficiently. I’m a good fit when you need a mobile developer who can think beyond screens and help shape the full product. Whether the goal is a fresh MVP, a native app for iOS or native Android or a cross platform mobile app that can grow over time, I focus on code quality, maintainability, and practical results. I also make sure the work stays aligned with product goals, so the app is not just built well, but built in a way that supports growth and future updates. 🚀 If you need a Flutter developer, React Native developer, Xamarin developer, .NET MAUI developer, Swift developer, iOS developer, Android developer, Kotlin developer, mobile app developer, web developer, MVP development specialist, API integration expert, or full stack developer who can bring structure to a complex build and get it shipped, I’m ready to help.
Vitalii A. has worked .
DevsX
Associated with
DevsX
$1M+
earned
Hanna B.
$35/hr
100% Job Success
$20K+ earned
Available now
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Hi! 💫Living the Shopify ecosystem daily. I am not interested in just building or optimizing Shopify stores and Shopify apps - I breathe life into them with my proactive approach, transforming your digital presence into a high-converting masterpiece. I am a Shopify developer who actually cares if your store sells, not just if it looks nice. Shopify app developer who's been through Shopify's strict review process enough times to write clean code from the start - there will be no bloated JS and no surprises. What I’ve achieved as a Shopify developer so far: 🟢 developed 57 Shopify stores, including 28 custom Shopify store setup, 20 on them are on Shopify Plus | 20 stores built where I was converting Figma designs into Shopify pages. My clients, who are fashion, supplement, lifestyle, pet supplies and other brands, earned around 50M$ after my Shopify development assistance. 🟢 developed 45+ Shopify apps. Being a certified Shopify app developer, I build public and custom apps that pass the strictest "Built for Shopify" standards with my extensive skill in Shopify APIs. 🟢 mastered the art of Shopify migration. I’ve completed 27 Shopify migrations - from Wordpress WooCommerce, Magento, and WordPress to Shopify. As your Shopify developer, I guarantee a seamless move where your SEO authority and customer data remain untouched. 🟢 developed high-performance solutions. As a Shopify developer liquid is the only framework I always use to customize a Shopify store. For a real Shopify expert, it’s a foundation of their work. In my 7 years as a Shopify developer, I’ve seen too many entrepreneurs waste money fixing "cheap" mistakes. Whether you’re just starting with Shopify Basic/Advanced or scaling to Shopify Plus, I make sure your tech setup is an asset from day one, not a constant drain on your wallet. As a Shopify developer, I’ve learned that the difference between a storefront and a powerhouse lies in the architecture. Over the last 5 years, I’ve seen how many businesses hit a "glass ceiling" because of poor technical execution. My mission is to ensure that your Shopify store ecosystem is a driver of growth, not a bottleneck. Core services delivered by me as a Shopify expert: ☑️ Enterprise Shopify Plus Builds: Full-cycle execution for high-scale brands needing custom logic and API integrations (ERP, CRM, SaaS). ☑️ Public & Custom Shopify App Development: From private integrations to apps listed on the Shopify app Store using the latest React Router stacks. ☑️ Bespoke Shopify Theme Development: Converting Figma design into high-converting Shopify theme. A Shopify developer must ensure every pixel serves the conversion - like a proper Shopify designer. ☑️ Shopify developer - Performance and Audit: Deep-dive technical audits and "trouble-shooting." As a Shopify developer, I regularly boost conversion rate metrics by up to 120% through advanced performance tuning and tech debt fixing. ☑️ Shopify developer - Headless Experience: Within Shopify hydrogen theme stack, I am specialized in modern stacks for brands that want to push the boundaries of the Shopify ecosystem. Why trust your brand to me as a seasoned Shopify developer? 1 Strategic Thinking. I don't just "fix bugs" - I look at your store through the lens of a Shopify developer expert who understands Shopify CRO, Shopify SEO, and user psychology. 2 No Technical Debt. Many Shopify developers build for today; as a Shopify web developer, I build for your future. I use Git-based workflows and scalable processes so your site can grow with you. 3 Always Transparent Communication. You won't hear "dev-speak" from me. I communicate as a business partner and a Shopify expert who focuses on what actually moves the needle for your ROI. My Tech Stack (Mastered by a Shopify developer seo marketing): Shopify Plus | Shopify expert | Marketplace specialist | Shopify App Development | Headless Shopify | Shopify SEO | Shopify designer | Liquid developer | React | Shopify Theme Development | Shopify 2.0 | GraphQL | Node.js | Shopify Migration | Shopify Redesign | Figma to Shopify | Shopify expert | Tailwind | Shopify CRO | Wordpress to Shopify migration | Shopify marketing | Migration to Shopify | Shopify custom coding Shopify web development | Shopify cro | Shopify developer cro | Kajabi | HTML to Shopify | Liquid | Shopify web developer I know you are looking for a partner who takes as much pride in your Shopify store / app stability as you do in its growth. Let’s talk. My goal as a Shopify designer and Shopify developer is to strip away the technical noise so you can focus entirely on your vision. Send me a message with your challenges, and we’ll build the high-performance foundation your brand deserves. Just elite execution.
DevIT
Associated with
DevIT
$6M+
earned
Dmytro K.
$30/hr
100% Job Success
$9K+ earned
Available now
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Stop losing users to clunky, slow-loading interfaces, research shows 53% of users will abandon a web app if it takes more than three seconds to load! 🚀 I am a Senior full stack developer and Senior Engineer with 8 years of experience building elite, high-performing web apps. As a full stack developer and specifically a full stack developer react node, I architect scalable SaaS platforms. When you need a full stack developer react node, you get a versatile web developer, skilled front-end developer, and robust back-end developer. Here is how my full stack developer react node expertise ensures your website and web app succeed: Reduced page loads by 42% for a flagship saas product as lead full stack developer, bridging the gap between a ux designer and a front end developer react. Scaled a react and node.js web app for 100k+ users, proving the value of a dedicated full stack developer react node utilizing the mern stack. Boosted retention by 30% by overhauling website ia, showing exactly why your MVP needs a reliable full stack developer react node. 💻 Architecture & Front-End Excellence 💡 As a dedicated full stack developer, I leverage mern architecture, next.js, and react to build robust solutions. A top-tier full stack developer react node combines the vision of a ux designer and a designer to ensure exceptional ia. I am a react developer and front-end developer integrating a high-converting exaplainer video or demo video to boost saas sales and saas marketing. A successful web developer and full stack developer masters the MERN stack, javascript, vue.js, and angular for comprehensive saas platforms. Every web app I build as a full stack developer react node relies on node.js, nestJS, react, and next.js to deliver an ai-powered experience. A full stack developer react node knows react is the key to scalable ui. As a full stack developer I guarantee every saas mvp is flawlessly executed by a true full stack developer react node,. 📱 Mobile App Development & Full Stack Power ⚙️ As a mobile app developer and full stack developer react node, I create every native app with precision. Using react native and react native mobile, your mobile app is seamless. A full stack developer knows a react native mobile deployment requires a strong back-end developer managing firebase and supabase. As a react developer and full stack developer react node, every native app and web app I build integrates flawlessly with node.jss and next.js. Hire a full stack developer react node and get a react developer who masters supabase to firebase, ensuring your react ecosystem thrives. Every saas business needs a full stack developer react node who is both ui-focused and backend-focused. 📈 E-commerce, Backend & Niches 🔥 Building a custom shopify storefront, shopify website, or shopify platform? A full stack developer react node brings essential php and laravel skills. As a back-end developer and full stack developer, I leverage laravel, python, and php, ensuring advanced laravel routing for complex b2b software. A full stack developer react node excels in e-commerce, integrating woocommerce and shopify. My full stack developer react node experience covers everything from a landing page to a healthcare app, clinic saas, and fitness saas using rest api and postgresql. As an ai workflow engineer and front-end layout engineer, I engineered a security automation platform, cold email software, and live commerce saas. 🚀 Next-Level Web Solutions 🌐 As a full stack developer, I deliver a cost-controlled MVP using webflow customization / react integration and aws. My skills build a robust business management app and scalable MVP management system. Whether creating a browser extension, deterministic fsm intake system, or live basketball betting dashboard, I am the full stack developer react node for you. Deploying a multi-dealer inventory marketplace and web-based casino game utilizing redis, websocket, and java spring proved my wordpress developer capabilities. My webflow customization / integration drives social integration and onboarding flow enhancement. I build an ai-powered / ai-savvy mvp with css grid, ai, and next.js. Need a full stack developer react node to scale? My expertise as a full stack developer react node and full stack developer is unmatched. A web developer mastering ia, mern, and webflow ensures your demo video, woocommerce exaplainer video, and webflow perfectly boost mvp sales and SaaS marketing. When you hire a full stack developer, you need an engineer who breathes react and SaaS. My journey as a full stack developer react node guarantees that whether we are scaling a SaaS platform or a bespoke web app, your react architecture remains pristine. A dedicated full stack developer react node is the ultimate asset for your SaaS. As a Full Stack Developer React Node, I empower your business to thrive. Hire a full stack developer react node to scale your SaaS, MERN web app, and react native mobile app today!
Dmytro K. has worked .