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Viktor R.
$30/hr
100% Job Success
$100K+ earned
Available now
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Full Stack Developer with 10 years of experience and Team Lead - your trusted long-term development and solution architecture partner The code is invisible; the outcome is not WIth me: - Autobound grew from one engineer to a 10-person team through 5+ years of our cooperation, and raised more than $4M in funding along the way. - DriverHRIS evolved from a slow 1000-screen system into a fully rebuilt product, backed by a 12-person dev team, over 4+ years. - Augmento expanded from a prototype to an 8-person dev team in 2 years, powering AR experiences for global brands and securing $2.5M in investment. At Wawibox (Germany, dental-industry SaaS), I've led the engineering team for 6+ years — owning the full rewrite of the legacy Vue 2 platform into a modern Vue 3 / Nuxt 3 / Node.js / TypeScript / PostgreSQL stack without a single day of downtime for paying clinics I'm also an early and heavy Claude power-user — AI-assisted development is part of how I ship, not a novelty bolted on. Cursor, Claude Code, agentic workflows, LLM integrations in production — I've been living in this stack since the day it existed. Got a product to build, scale, or rescue? Whether it's a new build, a team extension, or a legacy system that's slowing you down — message me and let's find a solution that actually fits your situation. The first 30 minutes are on me, and you'll walk away with a clear next step either way. 🚀 SEO Section What I do as a Full Stack Developer - and how to find me: I take on full stack developer SaaS builds, full stack developer fintech , Stripe usually , full stack developer ecommerce and full stack developer healthcare projects. I scope full stack developer marketplace platforms, full stack developer CRM integrations, full stack developer LLM features for AI layers OpenAI ChatGPT Claude Code, and full stack developer AI prototypes I've shipped as a web developer, a React developer, a WordPress developer, and a mobile app developer. Products rarely fit one box, so a web developer who's also a React developer, a WordPress developer, and a mobile app developer shipping React Native, iOS, Android Swift, and Flutter builds just moves faster and argues less. Stack I'm fluent in: JavaScript, Node.js, React, Python, Vue.js, API Integration, CSS3, CSS 3, HTML5, Laravel, MySQL, WordPress, Web Application, Web Design, Full-Stack Development, Software Development, Git, Tailwind CSS, Bootstrap, jQuery, Front-End Development Frameworks, Back-End Development Frameworks, Angular, and whatever Front-End Development Framework the team has standardized on. On the server, Node.js and Express for most new work, PHP with Laravel — full stack developer Laravel projects are common for me — and CodeIgniter for careful legacy migrations. Back-End Development Framework choices are tools, not religion. Python full stack developer engagements are some of my favorites: Python full stack developer Flask for lightweight services, Python full stack developer Django when a team wants batteries included. I also take on .NET full stack developer migrations when clients modernize off older stacks. Data and infrastructure: SQL, MySQL, PostgreSQL, MongoDB, Database Architecture thinking from day one, Firebase and Supabase for fast product iteration, AWS for production, REST and GraphQL API design, API Integration across third-party services. I work deeply in WordPress and Shopify — full stack developer Shopify builds ranging from theme work to full custom, plus full stack developer Webflow engagements, full stack developer Supabase projects, and full stack developer Twilio integrations. Web Design details get the same attention as the code. Adobe Photoshop when brand polish matters. JavaScript stays the connective tissue. I ship Web Application, Desktop Application, and Standalone Application as full stack web developer Software Design, Software Architecture & Design written down before the first line of code so Full-Stack Development stays coherent. Software Testing, Software Debugging before ship. Application Improvement and Software Consultation on live products. Agile Software Development with daily Git commits. Software Development I`m the most suitable developer for this role Every Full Stack Developer engagement I take on starts with review, whether you need a web developer, a React developer, a WordPress developer, or a mobile app developer I work as a full stack developer shopify and c# full stack developer .NET backend developer and web developer. Also as a mobile app developer and wordpress developer fullstack I am full stack developer react delivering as Full Stack Developer | React developer | Web developer fullstackdeveloper wordpressfullstack fullstackweb developer seniorfullstackdeveloper javascriptfullstack web developer full stack mobile app developer and web app developer node.js developer asp.net developer c# backend developer So all that makes me a Full-Stack Developer and Software developer + web developer
Softonix
Associated with
Softonix
$1M+
earned
Illia F.
$35/hr
100% Job Success
$200K+ earned
Offers consultations
Start of list.
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Full Stack Developer | 5M software End-Users Impacted | $200K+ Total Earnings | Expert-Vetted (Top 1% Upwork) | 26 Projects | 100% Job Success | 12+ Years on Upwork | 5339+ Hours Worked | TOP RATED PLUS – Top 3% of companies | 15+ Countries Covered 🙈 “Can we just quickly fix this?” 🙊 “It’s probably just a small change.” 🙉 “Let’s ship first and think later.” I am a CEO and Business Manager at Peppernode. I help create systems where architecture matters, decisions matter, and the cost of mistakes is higher than the cost of doing it right. Call me Illia. ✅ Full Stack Developer React ✅ React Developer ✅ React Native Developer ✅ React Native Mobile Developer ✅ Python Developer ✅ Front end Developer ✅ Mobile App Developer ✅ SaaS Developer With 12+ years of experience, I specialize in building scalable SaaS platforms, high-performance mobile applications, and production systems designed for long-term growth. I work as a React Full Stack Developer, React Native App Developer, React Developer, and Python Developer helping startups and established businesses transform ideas into reliable products that scale. I combine web development, Mobile App Developer, and business analysis to connect business goals with technical execution. My react native full stack background helps align product strategy, architecture, and delivery. 🏆 Why Clients Choose Me As a Full Stack Developer React with 31 successful projects delivered across 15+ countries, I've helped build products now serving more than 5 million end-users worldwide. With 100% Job Success, $200K+ earned, and 5,339+ hours worked on Upwork, I bring proven experience designing scalable applications, validating product strategies, and helping businesses make the right technical decisions from day one. 🚀 SaaS Product Development I build modern SaaS platforms as a Full Stack Developer React using React, Python, Firebase, scalable architecture built to scale. I work as a React Developer Firebase specialist delivering connected experiences across frontend and backend systems. My experience includes architecture planning, MVP development, frontend/backend implementation, payment integrations, and product evolution. 📱 React Native App Development As a React Native Developer and React Native App Developer, I build cross-platform applications delivering consistent experiences across iOS and Android. As a React Developer and Mobile App Developer, I deliver React Native Mobile solutions built for reliability and performance. As a react native developer expo specialist, I move products from MVP to production while maintaining a high-quality user experience. My experience includes mobile app development react native projects for startups and businesses requiring speed, flexibility, and long-term scalability. My work includes React Native and Expo development, feature delivery as a full stack developer react native, mobile MVPs and enterprise applications, API integrations, App Store and Google Play releases, performance optimization, product support. I have experience as a node js react native mobile developer building connected mobile ecosystems powered by scalable backend services. 🍽 Restaurant Ordering Systems I have experience developing restaurant ordering solutions serving thousands of daily users, with a strong focus on reliability, operational efficiency, and seamless customer experiences. Several included React Native Mobile experiences for customers and operational teams. These systems require solid architecture and stable integrations. 📌 Existing Product Modernization Many teams come to me after moving too fast. As a Front End Developer React and Full Stack Developer React, I improve existing applications through refactoring unstable codebases, optimizing performance bottlenecks, introducing scalable architecture, reducing technical debt, and expanding functionality without sacrificing maintainability. 🤖 AI Integrations & Automation I work as a Full Stack Developer AI building solutions with OpenAI API, Gemini, LangChain, Copilot, and modern AI workflows to create intelligent product experiences, including AI-powered features, chat interfaces, workflow automation, knowledge retrieval, and productivity enhancements. 🔧 Workflow & Tech Stack Discovery and planning begin with business analysis, technical discovery, architecture decisions, and product strategy. Frontend technologies include React, React Native, Expo, TypeScript, JS, HTML5, CSS. Backend development is built with Python, FastAPI, Django, Node.js, REST APIs, GraphQL, PostgreSQL, MySQL, Firebase, Stripe integrations. As a Python Full Stack Developer Flask specialist, I focus on maintainable systems, integrations, and architectures designed for long-term evolution. 🚀 Need a Web Developer, React Developer, React Native Developer, Full Stack Developer React Node or Python Full Stack Developer who thinks beyond code and builds products designed to scale? Let’s talk.
Illia F. has worked .
Peppernode
Associated with
Peppernode
$500K+
earned
Ihor A.
$40/hr
100% Job Success
$100K+ earned
Available now
Offers consultations
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🧠 Backend That Drives Business 🔥 Senior Backend Developer | Node.js/Nest.js | AWS | JavaScript | TypeScript | 🚀 Top Rated Plus on Upwork (Top 3%) 💻 5+ Years of Scalable Backend Engineering 🚀 $1M+ monthly revenue processed through my solutions 🌐 4000+ hours on Upwork | ⭐ Top Rated Plus (Top 3%) 📊 Built platforms used by millions of users globally 💡 Industries Served 🏦 Fintech | 🧠 AI & SaaS | 📱 B2B Tools | 🛍 E-commerce | 🧑‍💼 Enterprise Platforms 📊 MVPs | Real-Time Systems | Scalable Startups | Secure Web Apps As a Backend Developer, I’ve built and maintained real-time APIs, modular microservices, CI/CD pipelines, and cloud-based infrastructures that support millions of users. ✅ Why Clients Choose Me as Their Backend Developer: Proven record on Upwork:   → 100% Job Success Score | Top Rated Plus ✔Deep expertise in Node.js backend development as a Backend Developer ✔Strong knowledge of API architecture, microservices, and performance optimization from a Backend Developer perspective ✔Hands-on experience in building cloud infrastructure for backend systems as a Back-End Developer ✔Proven ability to handle backend scaling, security, and stability as a senior Backend Developer ✔Focused on business logic, product growth, and long-term maintainability as a Backend Developer 🛠️ Backend Developer Tech Stack: ✔ Programming & Frameworks: Node.js, NestJS, Express.js, Fastify, TypeScript, JavaScript — all applied by me as a Backend Developer ✔ Databases & Queries: PostgreSQL, MySQL, MongoDB, Redis, Knex.js, advanced SQL optimization managed as a Back-End Developer ✔ API Development: RESTful API development, GraphQL, JWT, OAuth 2.0, versioning, error handling, caching — core Backend Developer skills ✔ Cloud & DevOps for Backend: AWS (EC2, S3, RDS, Lambda, VPC, IAM, CloudFront), Terraform, Docker, Heroku, GitHub Actions, GitLab CI/CD used extensively in my Backend Developer role ✔ Testing & Quality: Mocha, Chai, unit testing, integration testing, coverage tracking, test strategy documentation — implemented as a professional Backend Developer ✔ Tools & Integrations: Google APIs, Twilio, Segment, Paddle, Crisp, WebSockets, Socket.IO, CI/CD tooling, monitoring & logging (Sentry, CloudWatch) handled by me as a Backend Developer 🚀 What I Bring as a Node.js Backend Developer: ✔As a Node.js Backend Developer, I deliver: ✔Scalable and secure backend APIs and microservices ✔Real-time Node.js backend features (chat, notifications, live updates) built by a skilled Backend Developer ✔End-to-end authentication and authorization logic with role-based access designed by a Backend Developer ✔Infrastructure automation using Terraform and Docker, managed by me as a Back-End Developer ✔API integrations with third-party services via secure backend logic from a Backend Developer ✔Custom DevOps pipelines for fast and reliable deployment created as a Backend Developer ✔Modular backend systems based on clean architecture principles, engineered by a Backend Developer 🧩 Real-World Solutions I've Built as a Backend Developer: 🔐 Login Security System Built a credential-stuffing–resistant login system using Redis, JWT, and NestJS — now protecting millions of logins across global brands, developed as a Backend Developer. ⚙️ Dynamic Pricing Logic Created a backend module that calculates personalized pricing using user segments, membership tiers, entry source, and active promotions — deployed as a Node.js Lambda service by a Backend Developer. 📡 Real-Time Messaging API Developed a live messaging backend using Node.js, WebSockets, and Twilio for a B2B dashboard — supporting secure, encrypted communications between users, engineered as a Backend Developer. 📈 Internal Data Dashboards Architected backend for a dashboard tool used by 100+ engineers to monitor productivity, tasks, and release cycles — built with clean REST APIs, PostgreSQL, and RBAC by a Backend Developer. 🤖 AI-Powered Backend Integration Integrated machine learning services into the Node.js backend to summarize product reviews and push personalized insights into frontend apps as a Backend Developer. 🧵 Group Workflow Automation Developed a backend system to automate embroidered logo placement and approval flows via SMB protocol — reducing human intervention and saving operational costs, delivered by a Backend Developer. 🔍 Ideal Backend Developer Projects: ✔️SaaS platforms scaling up and needing robust Node.js backends ✔️MVPs requiring fast, modular backend delivery with clean code by a Backend Developer ✔️Real-time apps (chat, analytics dashboards, live notifications) built by a Backend Developer ✔️Backend system migration from legacy monoliths to modern microservices led by a Backend Developer 📩 If you're looking for a skilled and committed Backend Developer, I’d love to hear about your project. Let’s build something powerful. 💬 Let’s Work Together
Seedium
Associated with
Seedium
$2M+
earned
Oleh K.
$35/hr
100% Job Success
$100K+ earned
Available now
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🔥Your Webflow website shouldn’t just look good - it should convert. I build 𝗵𝗶𝗴𝗵-𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗶𝗻𝗴 𝗪𝗲𝗯𝗳𝗹𝗼𝘄 𝘄𝗲𝗯𝘀𝗶𝘁𝗲𝘀, that help startups, SaaS, and businesses turn visitors into clients. 𝗪𝗶𝘁𝗵 𝗮 𝟳 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗮𝗻𝗱 𝘀𝘁𝗿𝗼𝗻𝗴 𝗺𝗶𝘅 𝗼𝗳 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗮𝗻𝗱 𝗨𝗜/𝗨𝗫 𝘁𝗵𝗶𝗻𝗸𝗶𝗻𝗴, I create websites that not only look professional, but also make content easier to manage, improve user experience, and support real business goals. 𝗠𝗬 𝗪𝗘𝗕𝗙𝗟𝗢𝗪 𝗦𝗘𝗥𝗩𝗜𝗖𝗘𝗦: ✅ Custom Webflow websites (from scratch) ✅ Figma to Webflow (pixel-perfect) ✅Webflow template customization ✅ Webflow CMS setup & structure ✅ Landing pages that convert ✅ Website redesigns (modern & clean) ✅ Responsive & mobile-first development ✅ Performance & UX optimization ✅ Ongoing Webflow support 💎𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗧𝗡𝗦 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘 - I help founders, startups, and growing businesses design and build websites that attract, engage, and convert users. - My focus is high-performance websites built with Webflow, powered by strategic UI/UX design, clean CMS architecture, and conversion-focused layouts. - I combine design thinking + no-code development + SEO-ready structure to turn underperforming websites into scalable business assets. 🎯𝗪𝗛𝗢 𝗜 𝗪𝗢𝗥𝗞 𝗪𝗜𝗧𝗛 • Startups building MVPs & investor-ready Webflow websites • Founders & solopreneurs launching personal brands & landing pages • SaaS companies improving conversion & user experience • Agencies outsourcing Webflow development • Growing businesses redesigning or scaling their Webflow sites 💼𝗔𝗕𝗢𝗨𝗧 𝗠𝗘 🌍 400+ websites designed & developed 🎨 7+ years in UI/UX & web design 🧩 Webflow, WordPress & Framer expert 📐 Figma-first design workflow 📈 Average +35–90% conversion lift after redesigns 👥 Clients across US, EU, UK, Canada & Australia ⚡ Fast, clean, scalable CMS builds 🕒 Clear communication & on-time delivery 💡𝗣𝗥𝗢𝗖𝗘𝗦𝗦 1️⃣ UX research & project goals alignment 2️⃣ Wireframes & UI design in Figma 3️⃣ Conversion-focused layout & content structure 4️⃣ Clean, scalable Webflow development 5️⃣ CMS setup, SEO basics & performance optimization 6️⃣ Launch & ongoing support 𝗘𝘃𝗲𝗿𝘆 𝘀𝘁𝗲𝗽 𝗶𝘀 𝗯𝘂𝗶𝗹𝘁 𝘁𝗼 𝘀𝘂𝗽𝗽𝗼𝗿𝘁 𝗿𝗲𝗮𝗹 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗼𝘂𝘁𝗰𝗼𝗺𝗲𝘀, 𝗻𝗼𝘁 𝗷𝘂𝘀𝘁 𝘃𝗶𝘀𝘂𝗮𝗹𝘀. 🚀𝗟𝗘𝗧'𝗦 𝗕𝗨𝗜𝗟𝗗 𝗔 𝗪𝗘𝗕𝗦𝗜𝗧𝗘 𝗧𝗛𝗔𝗧 𝗪𝗢𝗥𝗞𝗦 Message me to discuss your project I help businesses launch faster, convert better, and scale confidently Limited slots available — quality over quantity ⚡If you're looking for a reliable Webflow developer who focuses on results — feel free to reach out. 𝗟𝗲𝘁’𝘀 𝗯𝘂𝗶𝗹𝗱 𝘀𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝘁𝗵𝗮𝘁 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝘄𝗼𝗿𝗸𝘀. 📚𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 & 𝗞𝗘𝗬𝗪𝗢𝗥𝗗𝗦 Webflow Developer, Webflow CMS, Figma to Webflow, Landing Pages, Website Redesign, Responsive Web Design, CMS Development, Webflow Animations, Interaction Design, Conversion-Focused Design, SEO-Friendly Websites, Performance Optimization, No-Code Development, Front-End Development
Oleh K. has worked .
Roman Z.
$24/hr
100% Job Success
$3K+ earned
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If you’re looking for someone who can design, build, optimize, and support web applications — from the first line of code to production launch — you’re in the right place. I have Full-Stack JavaScript/TypeScript engineers who can take over both the client and server side: implement new features, refactor legacy parts, enhance performance, fix complex bugs, integrate APIs, and guide your project through the entire development cycle. I collaborate with other engineers and designers when needed, offering a full range of services across web & mobile development. We are a team of engineers who design, develop, and scale modern digital products. From building new products from scratch to modernizing existing systems, we handle every stage of the development cycle — implementing features, refactoring legacy code, optimizing performance, fixing complex bugs, integrating APIs, and ensuring scalable, maintainable solutions. Together, we deliver high-quality digital products tailored to your business needs. Our specialists include frontend, backend, and full-stack developers, as well as mobile engineers and UI/UX designers. Together, we deliver robust, maintainable, and user-focused solutions. 🏆 Industries & Product Expertise Our team has experience working across a wide range of product types and verticals: 🏠 Real Estate platforms & booking systems 💬 Social media tools, community apps, messaging features 💸 SaaS products & subscription platforms 🏥 Healthcare & MedTech solutions 🤖 AI-powered services, chatbots & automation tools 🏋️ Fitness, wellness & activity tracking apps 📚 EdTech platforms, LMS, interactive learning tools 📌 What we do We create: 🚀 Custom Web Applications 📱 Cross-platform Mobile Apps 🧩 Complex System Integrations ♻️ Refactoring & Architecture Redesign 🛠️ Feature Development & Continuous Support 🧪 Automated Testing & QA ⚙️ DevOps, CI/CD, infrastructure setup 🖥️ FRONTEND DEVELOPMENT We build fast, scalable, and visually polished interfaces using modern technologies: JavaScript / TypeScript React, Next.js Angular, Vue.js Material UI, Ant Design, Shadcn UI, TailwindCSS, styled-components Data Visualization (Chart.js, Recharts, D3, ApexCharts, Highcharts) WebSockets, Socket.io HTML5, CSS3, SCSS ⚙️ BACKEND DEVELOPMENT Our backend engineers create secure, scalable, and maintainable systems: Node.js, Express.js NestJS PostgreSQL, MongoDB Firebase, Supabase AWS (Amplify, Lambda, Cognito, S3, EC2, API Gateway) Docker, CI/CD pipelines GraphQL Auth0, OAuth, JWT MQ systems: RabbitMQ, Kafka Elasticsearch Stripe payments, Twilio SMS/WhatsApp, SendGrid emails API integrations of any complexity Automated Testing (Jest, Mocha) OpenAI & ChatGPT API integrations 👥 Who we are We are an INCODE development team focused on building high-quality web and mobile applications. Our goal is to deliver seamless, intuitive digital experiences across all platforms. From the first draft of your idea to a fully deployed product, we support every step of the process while staying aligned with your deadlines and business objectives. Our core expertise includes Front-End and Back-End development, UI/UX design, and mobile application engineering. We rely on modern JavaScript and TypeScript ecosystems to help your product grow and transform your concept into a reliable, scalable solution. ☎️Our mission is simple: turn your vision into a polished, dependable digital product. Whether you're starting from a blank page or improving an existing system, we're ready to take on the challenge and deliver real value. Let’s create something exceptional together.
Valerii C.
$45/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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🚀 The Top 3% of 𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 Node.js & Full-Stack Talent on Upwork 🤖 Modern 𝐀𝐈 𝐒𝐭𝐚𝐜𝐤: Cursor, Lovable, Claude Code, GitHub Copilot, GPT-4/GPT-4o, Claude Sonnet/Opus ⚡ 10+ Years of Professional Experience ⚡ 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬, 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 ⚡ 30–40% Faster Delivery Through 𝐀𝐈-𝐀𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 Welcome! 👋 I'm a Senior Node.js Developer, Node.js Backend Developer, and Full-Stack Developer specializing in scalable, secure, and high-performance backend systems. For 10+ years, I've helped companies architect, build, optimize, and modernize SaaS platforms, enterprise applications, fintech products, healthcare solutions, CRM/ERP systems, and marketplace platforms. From Startup MVPs to enterprise ecosystems, I deliver software designed to scale with business growth. 🔥 WHAT YOU GET ✔ High-Performance Backend systems engineered to process millions of requests with 99.99% uptime. ✔ Production-ready features delivered 30–40% faster using AI-assisted development and AI-generated code workflows. ✔ End-to-End Development—from MVP Development and Product Development to long-term Backend Support and Application Maintenance. ✔ A Dedicated Developer and Technical Lead focused on measurable business outcomes. 🤖 AI-ASSISTED ENGINEERING STACK ✔ 5+ years leveraging Cursor, GitHub Copilot, Claude Code, OpenAI ChatGPT, GPT-4, and GPT-4o to accelerate prototyping, debugging, testing, and implementation by 30–40%. ✔ While AI accelerates delivery, critical architecture decisions, scalability planning, and Technical Lead responsibilities remain grounded in 10+ years of engineering experience. 🚚 WHERE I DELIVER As a Senior Node.js Developer and Backend Engineer, I build REST API and GraphQL API ecosystems using Node.js, Express.js, NestJS, Fastify, Koa.js, JavaScript, TypeScript, WebSocket, Socket, Microservices, and Event-Driven Architecture. As an API Developer and REST API Developer, I deliver API Development, API Integration, Third-Party API Integration, Authentication, Authorization, JWT, OAuth, SSO, Swagger, OpenAPI, and API Documentation for secure enterprise environments. As a Full Stack Developer, I create Web Applications, Ecommerce Websites, Website Redesign projects, Browser Extensions, Google Chrome Extensions, Desktop Applications, Platform Plugins, Headless CMS, CMS Integration, Odoo Development solutions, and End-to-End Development initiatives. As an AI engineering partner, I help companies implement AI Development through AI Agent Development, AI App Development, AI Bots, Chatbots, ChatGPT Integration, OpenAI API integrations, OpenAI Codex Prompt workflows, AI Model Integration, and AI-generated code strategies that improve team productivity by 30–40%. 💳 INTEGRATIONS & AUTOMATION ✔ 10+ years integrating Stripe Integration, PayPal Integration, Twilio Integration, SendGrid, shipping providers, Payment Integration services, Webhooks, and System Integration workflows. ✔ Built asynchronous architectures using RabbitMQ, Kafka, BullMQ, Queue Management, and Message Queues to improve throughput and reliability. ✔ Automated Data Processing and ETL pipelines that reduce manual effort and support real-time decision-making. ⚒️ TECHNOLOGY ECOSYSTEM ✔ 10+ years of Backend Development using Node.js, Express.js, NestJS, Fastify, JavaScript, TypeScript, Python, PHP, Java, Kotlin, Scala, Ruby, C#, ASP.NET, Django, and modern Software Architecture practices. ✔ 8+ years delivering Full-Stack Development with React, Angular, AngularJS, Vue.js, HTML5, CSS3, Bootstrap, jQuery, Google Analytics, Adobe Photoshop, and Website Optimization strategies. ✔ 10+ years designing Database Development and Database Architecture solutions using MongoDB, PostgreSQL, MySQL, Redis, DynamoDB, Firebase, Supabase, Prisma, TypeORM, Sequelize, Mongoose, Microsoft SQL Server, MariaDB, Oracle, Neo4j, and Azure Cosmos DB. ✔ 7+ years deploying cloud-native applications with Amazon Web Services (AWS), Lambda, EC2, S3, Azure, Google Cloud Platform, Docker, Kubernetes, DevOps, Serverless Architecture, GitHub Actions, Jenkins, Git, and CI/CD pipelines. 🏆 RESULTS & IMPACT ✔ Delivered SaaS Development initiatives, ecommerce solutions, enterprise applications, and real-time systems serving thousands of users worldwide. ✔ Improved API performance by up to 50% through Backend Optimization, Redis caching, and Database Architecture improvements. ✔ Accelerated release cycles by 30–40% using AI-native engineering practices without sacrificing maintainability. ✔ Built Scalable Backend infrastructures capable of supporting millions of transactions and sustained business growth. Whether you need a Node.js Developer, Node.js Backend Developer, Backend Engineer, Full-Stack Developer, API specialist, AI integration partner or Technical Lead I'd be happy to discuss your architecture, roadmap, and next steps.
Onix-Systems, LLC
Associated with
Onix-Systems, LLC
$20M+
earned
Volodymyr H.
$45/hr
100% Job Success
$200K+ earned
Available now
Offers consultations
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🚀 Upwork Certified PHP, SaaS & 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 Developer with 10+ years of development. 🤖 Most 𝐀𝐈 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 fail after the demo. We specialize in getting them to production. 🏆 $200K+ Total Earnings ⚡ 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬, 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 & 𝐋𝐋𝐌 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 ⚡ 30–40% Faster Delivery Through AI-Assisted Engineering 👀 Click Hire or Invite Senior PHP Developer, Backend Architect & AI Product Engineer 🤖 AI-NATIVE BACKEND ENGINEERING ✔ 5+ years leveraging AI-assisted development, AI-native engineering, and intelligent automation workflows. ✔ OpenAI integrations, AI chatbots, AI agents, prompt engineering, and AI-powered backend services. ✔ AI-assisted testing, AI-enhanced code review, AI-powered debugging, and automated development workflows accelerating delivery by 30–40%. ✔ AI Stack: Cursor, Claude Code, GPT-4/GPT-4o, Claude Sonnet & GitHub Copilot 🚚 WHERE I DELIVER ✔ As a PHP Developer and Laravel Developer — 10+ years, 50+ backend systems, and 1M+ daily requests processed using Laravel, Symfony, Yii2, CodeIgniter, and CakePHP. ✔ As a Senior PHP Backend Developer — 300K+ async jobs processed daily using Redis, RabbitMQ, queues, event-driven architecture, and scalable API ecosystems. ✔ As a Full Stack PHP Developer — 30+ frontend integrations using Vue.js, React, Angular, Livewire, Inertia.js, and Tailwind CSS with up to 40% faster delivery cycles. ✔ As a WordPress Developer and PHP WordPress Expert — 20+ CMS platforms, custom plugins, WooCommerce solutions, and content-driven websites launched for growing businesses. ✔ As a Web Developer and Backend Architect — 100+ third-party integrations including Stripe, PayPal, AWS SES, Firebase, SendGrid, and enterprise APIs. ✔ As a Python Developer and Node.js collaborator — 15+ automation projects, AI workflows, backend services, and intelligent integrations. 🏆 INDUSTRY IMPACT ✔ Ecommerce Platforms — 2,423+ completed orders, 489+ registered customers, and 34% faster order processing through backend optimization. ✔ Healthcare Systems — 10,000+ users supported through HIPAA-compliant workflows and secure patient management solutions. ✔ SaaS Platforms — 20+ products delivered with subscription billing, CRM systems, ERP functionality, and multi-tenant architecture. ✔ Logistics Platforms — 30% faster reporting, automated workflows, and thousands of transactions processed monthly. ✔ Insurance Platforms — 40% lower operational overhead through document automation and workflow optimization. ✔ AI-Powered Products — 5+ AI solutions, OpenAI integrations, AI Agents, AI Chatbots, and RAG-powered systems reducing manual tasks by up to 40%. ✔ Marketplace Solutions — 1,666+ catalog items managed, 4-role permission systems, and 2.7x operational capacity improvements. ✔ Startup MVPs — 5–8 weeks faster launch cycles and up to 35% fewer production issues through scalable architecture and AI-assisted engineering. ⚒ HOW I BUILD ✔ 10+ years with PHP, Laravel, Symfony, Yii2, CodeIgniter, CakePHP, and enterprise backend architecture. ✔ 8+ years with MySQL, PostgreSQL, MongoDB, Redis, RabbitMQ, caching layers, and high-load optimization. ✔ 7+ years with AWS, S3, MinIO, Nginx, Apache, Docker, CI/CD, and cloud infrastructure management. ✔ 5+ years leveraging AI-assisted development, OpenAI APIs, AI automation, AI testing, and AI-powered debugging workflows. ✔ 50+ delivered applications, 1M+ daily requests handled, and 300K+ asynchronous tasks processed through scalable backend ecosystems 🏆 ACHIEVEMENTS ✔ 10+ years, $200K+ earnings, and dozens of successful long-term client partnerships. ✔ 1M+ requests per day and 300K+ async jobs daily processed through high-load PHP, Laravel, Redis, and RabbitMQ infrastructures. ✔ Up to 40% faster delivery and 50% lower infrastructure costs through architecture optimization, caching, and AI-assisted development. 🤝 WHY CLIENTS CHOOSE ME ✔ 10+ years of PHP, Laravel, Backend, and Full Stack expertise. ✔ $200K+ earned delivering scalable products from MVPs to enterprise platforms. ✔ Proven experience with 1M+ daily requests, high-load systems, and cloud-native architectures. ✔ AI-enhanced engineering delivering projects 30–40% faster without compromising quality. ✔ Long-term technical partner focused on scalability, performance, and ROI. 🚀 Have a SaaS platform, Ecommerce business, AI product, or custom web application that needs to scale? With 10+ years of PHP expertise, $200K+ earned, and experience building systems processing 1M+ requests per day, I can help turn your requirements into a secure, scalable, production-ready solution. Send an invite and let's explore the best technical approach for your project.
Volodymyr H. has worked .
Onix-Systems, LLC
Associated with
Onix-Systems, LLC
$20M+
earned
Andrii B.
$55/hr
100% Job Success
$500K+ earned
Offers consultations
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$540K+ earned. 190 projects delivered. 100% Job Success Score. Most automation freelancers take your brief, build what you described, and hand it off. I work differently. I embed into your operations (your CRM, your content pipeline, your lead flow, your intake process) and find what's actually costing you time and money. Then I build the system that fixes it. Not a template. Not a Zapier zap. A production-grade workflow with AI where it matters. What this looks like in practice: A marketing agency was manually posting content across 6 channels, spending 15+ hours/week on scheduling and reformatting. I built an AI content factory: one input, auto-adapted for each platform, scheduled and published through n8n. They got their week back. A construction company was losing 325+ hours/year on manual estimation in Google Sheets. I sat in on their process, built an AI estimation tool inside n8n, and cut it from 20 minutes to under 3. Live in 2 weeks. A Medicare insurance brokerage had 1,600+ contacts scattered across spreadsheets with 13 relationship types nobody could track. I built a relational CRM mesh in GoHighLevel. Proof of concept delivered in 1 day. What I build: → AI agents: lead qualification, document parsing, smart routing, customer-facing chatbots, voice agents (Vapi) → Workflow automation: n8n, Make, Zapier. Connecting CRMs, marketing platforms, ERPs, and internal tools into one system → CRM buildouts and migrations: GoHighLevel, HubSpot, ClickUp, Pipedrive. Clean data, working automations, zero downtime → AI content systems: multi-channel publishing pipelines, outreach sequences, ad attribution → Zapier/Make → self-hosted n8n migration: 80% cost reduction, unlimited workflows Stack: n8n, Supabase, PostgreSQL, Python, Node.js, Docker, OpenAI API, Claude API, Vapi, HubSpot, GoHighLevel, Pipedrive, Airtable, Google Sheets, LangChain, Slack, Telegram, AWS, DigitalOcean How I work: Every project starts with a systems audit. I map your process as it actually runs (not how you think it runs), identify the 2-3 bottlenecks that cost the most, and build a working proof of concept in days. If the PoC proves value, we go to production. Typical deployment: 2-5 weeks. I manage 180+ production workflows on self-hosted infrastructure right now. Who I work best with: → Businesses doing $1M+ revenue who need operations to scale without hiring more people → Teams drowning in manual processes across 5+ tools that don't talk to each other → Companies in construction, healthcare, real estate, and marketing agencies. I know these verticals → Clients ready to invest $2,000+ in automation that pays for itself within weeks Who I'm NOT a fit for: ✗ One-off tasks under $1000. I build systems, not quick fixes ✗ "Just connect two Zaps" requests. You don't need a senior engineer for that ✗ Projects without a clear business problem. If you can't explain what's broken, we're not ready ✗ Clients who want the cheapest option. My rate reflects 190 production deployments Background: Before automation, I ran a web development agency for 10 years. 1,500+ projects delivered, clients included Fortune 500 companies, government agencies, and global nonprofits. Scaled to 25 people, trained 100+ developers. Three years ago I started automating our own processes with n8n. The results changed my direction. If your team spends hours on work that follows the same pattern every time, I can automate it. Send me your project details.
Andrii B. has worked .
GLIVERA-TEAM - WordPress, ReactJS, Front end development Agency
Associated with
GLIVERA-TEAM - WordPress, ReactJS, Front end development Agency
$400K+
earned
Vadym S.
$35/hr
100% Job Success
$100K+ earned
Offers consultations
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Node.js and React is my love but React Native is my passion Hi there! I'm a senior Full Stack Developer React Node.js with 7+ years building web and mobile apps end to end, from the database up to pixel-perfect interfaces. I live in the JavaScript and TypeScript ecosystem and pair a React and Next.js frontend with a Node.js backend to ship scalable web applications and SaaS platforms. Most of my web app development and mobile app development work involves heavy third-party API integration. I've delivered everything from data-heavy dashboards to cross-platform React Native apps. 🏆 7+ years as a Full Stack Developer React Node.js & React Native Mobile Developer 🏆 $100K+ earned on Upwork as Full Stack developer at 100% Job Success Score with Top Rated status 🏆 3,000+ hours as a full stack web developer & React Native mobile developer across 10+ delivered projects 🏆 10+ web app development and mobile app development projects delivered as a Full Stack Developer I'M USUALLY BROUGHT INTO PROJECTS THAT NEED: - a Full Stack Developer who can take a feature from the database all the way to the UI without handing it off - a Backend Developer or Backend Engineer who has kept real production systems running, not just demos - a React Native Mobile Developer to ship a single codebase to both iOS and Android with proper cross-platform mobile app development - a Front End Developer or React developer who gets the React and Next.js UI pixel-perfect - a SaaS Developer who builds for the version you'll have in two years, not just launch day - an MVP developer whose MVPs are made to grow into real SaaS products - a web app developer for web applications where the workflows and business rules are the hard part BACKEND IS WHERE I SPEND MOST OF MY TIME. AS A BACKEND DEVELOPER AND NODE.JS DEVELOPER, THAT MEANS: - designing and shipping backend services in Node.js and TypeScript with Nest.js and Express, the full stack developer react node engine behind most of my progressive web applications - owning data in PostgreSQL end to end, from schema to migrations, plus Redis, MongoDB and DynamoDB where they fit - treating API integration as core work, the kind of api developer territory that covers REST APIs IN A REACT NATIVE MOBILE DEVELOPER ROLE, I CAN TAKE CARE OF: - shipping a single React Native codebase to iOS and Android, real cross-platform mobile app development instead of two separate native teams - setting up React Native with Expo, navigation, push notifications and React Native Firebase for auth, storage and messaging - adding real-time features such as chat and calls with React Native WebRTC, plus offline support and clean mobile app design MY STRONG SKILLS INCLUDE: - Programming Languages: Javascript (ES5+) Typescript C# Solidity - Technologies: Node.js HTML5/CSS3 React React Native Smart Contracts (Ethereum) Ether.js - Frameworks: Express.js Nest.js Next.js Koa.js .NET Core React Native (Expo) - Libraries: Bootstrap Moment.js RxJs Nodemailer Redux Redux-toolkit Axios Sequelize TypeORM Prisma Dapper Entity Framework AutoMapper luxon SocketIO JsonWebToken Storybook - DBMS: MySQL PostgreSQL MongoDB FireBase SQlite3 DynamoDB Redis CosmoDB Neo4j - AI Tools I can use: Cursor GitHub Copilot Codex Claude A note on honesty, because it saves everyone time. I'm not your python developer, php javascript or java backend hire. I won't claim full stack developer php, python full stack developer, ruby on rails, wordpress full stack work as my own. A dedicated wordpress developer, shopify developer or flutter developer is the better call. I'm always open to new challenges, whether you need a full stack developer, a react native developer or just an extra senior pair of hands on a web app or mobile app development project. ☎️ Feel free to contact me here anytime. ---------------------------------------------------------------------------------------------------------------------- Tech Tags: Redshift Knex Playwright SQS Kinesis Puppeteer MinIO Server Sent Events NATS Meilisearch Microservices architecture CockroachDB JWT Passport.js Apollo Server Firebase TypeORM Mongoose MemoryDB Cache-Manager SendGrid AWS S3 CloudFront RESTful APIs Linter Gateway AWS AJW (validation) SMTP nodemailer Axios Slack API .NET 7 Core C#11 RabbitMQ.client Automapper classNames Redux-toolkit RTK Query AWS SES Xstate ERC-1155 stack developer react html css javascript react developer full stack developer web developer can't do wordpress developer mobile app developer full stack developer python developer full stack developer net full stack wordpress full stack full stack developer react full stake developer Full Stack web developer full stack web developer front end web developer web developer wordpress web app developer shopify web developer full stack web developer back end developer node.js full stack developer react node developer react
Vadym S. has worked .
BandaPixels, LLC
Associated with
BandaPixels, LLC
$1M+
earned
Bogdan T.
$35/hr
98% Job Success
$900K+ earned
Available now
Offers consultations
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🚀 I’m Bogdan, a Python developer with strong experience building backend systems, web applications, automation tools, APIs, integrations, and data-driven solutions for startups, product companies, and growing businesses. As a Python developer, I help clients create reliable software, improve existing systems, automate manual processes, and build scalable products that support real business needs. 💡 My main stack includes Python, Django, Flask, FastAPI, REST API, PostgreSQL, MySQL, MongoDB, Redis, Docker, Celery, Git, AWS, and modern backend development workflows. As a Python developer, I can build clean backend architecture, develop secure APIs, connect databases, integrate third-party services, and create features that are easy to maintain and scale. 🧩 My skills: • Golang • Python • Django • Web Application • SQL • PostgreSQL • MongoDB • ChatGPT • HTML5 • PHP • jQuery • RESTful API • API • WordPress • Vue.js • CSS • JavaScript • React • API Development ⚙️ I have experience as a Python developer working on SaaS platforms, admin panels, dashboards, CRM systems, automation scripts, booking systems, eCommerce solutions, internal tools, and custom web applications. My work as a Python developer includes backend logic, database design, API development, authentication systems, payment integrations, performance optimization, bug fixing, and long-term technical support. 🔧 As a Python developer, I focus on writing clean, readable, and maintainable code. I understand that good software should not only work today but also be easy to extend in the future. A Python developer should be able to think about performance, security, scalability, and product goals at the same time, and this is the approach I bring to every project. 🚀 I can work as a Python developer on new product development, MVP builds, backend refactoring, API integrations, automation tasks, data processing, web scraping, database improvements, and cloud deployment. I also have experience with background tasks, scheduled jobs, file processing, email systems, reporting tools, and business workflow automation. 📈 Clients hire me as a Python developer when they need someone reliable who can understand requirements, suggest practical solutions, and deliver solid technical results. I can join an existing team, take ownership of backend features, support scaling efforts, or help stabilize and improve an existing project. 🛠️ My services as a Python developer include Django development, Flask development, FastAPI development, REST API development, database design, backend architecture, automation scripts, web scraping, third-party API integration, bug fixing, performance optimization, Docker setup, deployment support, and ongoing maintenance. 🤝 Beyond coding, I contribute as a Python developer who understands communication, planning, and product delivery. I have experience with Git workflows, code reviews, task estimation, debugging, technical documentation, and working with both technical and non-technical clients. In some projects, I work only as a Python developer. In others, I also help with architecture decisions, backend planning, and improving development workflows. 🔍 As a Python developer, I value clear communication, attention to detail, and practical problem-solving. I always try to understand the business goal behind each task, not just the technical requirement. This helps me build solutions that are useful, stable, and aligned with the client’s needs. 🎯 If you need a Python developer who can build, improve, automate, and support modern software products, I’m ready to help. Whether you need a Python developer for a new backend system, API development, automation, bug fixing, database work, or long-term product support, I can provide reliable technical execution and a responsible approach to your project. Best regards, Bogdan
Bogdan T. has worked .
Join.To.IT - Top Rated Plus Agency 🏅
Associated with
Join.To.IT - Top Rated Plus Agency 🏅
$9M+
earned