I help startups and growing businesses build fast, scalable web and mobile applications using Next.js, Supabase, React, and React Native. As a full-stack developer, I take products from idea to production with clean, maintainable code and predictable delivery. I specialize in building SaaS platforms, marketplaces, and custom business tools with a strong focus on performance, user experience, and long-term scalability. Whether you need a modern web app with a polished UI or a cross-platform mobile app for iOS and Android, I can handle both end-to-end. I work hands-on in development while thinking like a product owner — helping you make the right technical decisions, avoid costly mistakes, and ship faster. My goal is simple: deliver solutions that work now and scale as your business grows, with clear communication at every step. Also, I am founder of Impactful Apps with 15+ years of experience in technical product management. My passion is building platforms that improve how businesses operate and how users interact with services, from MVPs to complex, multi-user SaaS systems. What I Can Help You Build - SaaS Platforms - MVP development for startups - Subscription platforms - Dashboards and internal SaaS tools - Marketplaces & Platforms - Two-sided marketplaces Listing platforms - Recruitment and matching systems - Business Applications - CRMs and internal tools - Operational dashboards - Workflow automation systems My Approach 1. Understand your product and business goals 2. Architect scalable and maintainable solutions 3. Develop the platform hands-on (frontend & backend) 4. Launch and iterate based on real usage I combine full-stack development skills with product thinking, so you get not just a developer, but a technical partner who can bring your idea from concept to launch. Typical Clients - Startup founders building their first SaaS product - Companies creating digital platforms or marketplaces - Businesses needing custom internal tools or automation If you’re planning to build a SaaS platform, marketplace, or complex web application, let’s talk — I can code it and lead the product development. Skills - Full-Stack Development (React, Next.js, Node.js) - AI Agentic Workspaces - SaaS Development - Marketplace & Platform Development - Product Architecture - API Development - UX/UI Collaboration - LowCode

👋 Hey everybody and welcome to my Upwork space! I’m a high skilled Full-Stack web developer with experience in creating top-notch progressive web applications using the MERN tech stack, so it's an easy choice for you. I’m strong in creating complex database (SQL, NoSQL) structures, implementing code in Java, JavaScript, React.js, Nuxt.js frameworks, jQuery library. Worked on server-side rendering app using Next.js, GraphQL/Apollo/Relay. Previously I worked in complex and high-scale projects developing entire UI, backend, widgets and frameworks from scratch. Also worked with serverless cloud services like AWS, Firebase, Supabase. Proficient in Google Cloud, AI integrations. Performance and quality are the most important aspects of great web applications, alongside code quality and in-time delivery, which I do in my work. You will get your source code in the Git or Bitbucket repository. Using the latest technologies and tools in coding I will strive to build you a great web application. Just send me an invitation and let's discuss the project🚀

I’m a full-stack developer with 8+ years of experience in Java, Spring Boot, Angular, and FlutterFlow, building scalable web and mobile applications. I focus on crafting clean backend architectures, intuitive user interfaces, and reliable solutions that perform under real-world demands. Over the years, I’ve delivered projects across different industries, helping teams improve efficiency and create better user experiences. If you’re looking for someone who can turn your ideas into high-quality, future-ready software, let’s connect.

I’m a Senior Python Engineer and Full Stack Developer with 8+ years of experience building web scraping infrastructure, automation platforms, backend systems, and scalable data engineering solutions for startups, SaaS products, trading companies, and data-driven businesses. Clients usually contact me for projects related to Python development, Full Stack development, backend development, backend APIs, web scraping, data extraction, browser automation, Playwright automation, Selenium automation, Scrapy development, ETL pipelines, workflow automation, automation systems, API integrations, real-time data processing, AI automation, OpenAI integrations, scalable backend systems, sportsbook software, betting systems, odds aggregation, analytics platforms, SaaS products, and high-load real-time data systems. Why clients work with me ✔ 8+ years of Python engineering experience ✔ 6+ years of Full-Stack engineering experience ✔ $400K+ earned on Upwork ✔ Top Rated Plus freelancer ✔ Production-grade scalable architectures ✔ Strong communication and reliable delivery ✔ Experience with high-load real-time systems ✔ Long-term technical partnership mindset My main stack includes: Python • FastAPI • Django • Flask • AsyncIO • REST APIs • GraphQL • Playwright • Selenium • Scrapy • WebSockets • Microservices • Celery • SQLAlchemy • Backend Architecture - Web Scraping & Data Engineering Playwright • Selenium • Scrapy • BeautifulSoup • Requests • Browser Automation • Data Extraction • Web Scraping • Data Mining • ETL Pipelines • Proxy Management • Pandas • NumPy • Dask • Scikit-learn • TensorFlow • PyTorch • XGBoost • OpenCV - Advanced Scraping Infrastructure Cloudflare • DataDome • Akamai Bot Manager • PerimeterX • reCAPTCHA • hCaptcha • Residential & Mobile Proxies • Session Management • Authentication Workflows • Browser Fingerprinting - Full Stack Development React • Next.js • TypeScript • JavaScript • HTML5 • CSS3 • Tailwind CSS • Admin Dashboards • SaaS Applications • Analytics Dashboards - Cloud, DevOps & Infrastructure Docker • Kubernetes • AWS • Google Cloud • Azure • GitHub Actions • GitLab CI/CD • Terraform • Ansible • Nginx • Linux AI & LLM Development OpenAI API • GPT-4 • Claude • Llama • AI Agents • RAG • Prompt Engineering • AI Automation • LLM Integrations • As a Full Stack Developer and backend developer, I build backend systems, APIs, automation platforms, web applications, analytics dashboards, browser automation workflows, admin panels, and scalable real-time data products designed for production environments. Web Scraping & Automation As a Python developer specializing in web scraping and automation systems, I build scalable scraping infrastructure for dynamic websites, protected platforms, APIs, marketplaces, SaaS products, and analytics systems. Scraping and automation projects include: • Large-scale web scraping systems • Data extraction pipelines • Browser automation with Playwright and Selenium • Scrapy-based scraping infrastructure • API reverse engineering and API integrations • Proxy management and anti-bot workflows • Marketplace and e-commerce data collection Backend Development & Automation Systems As a Full Stack Developer and backend developer, I also build scalable backend systems, backend APIs, automation infrastructure, workflow automation platforms, web applications, and real-time backend services. Typical backend and automation projects include: • Backend API development • Workflow automation systems • Real-time automation platforms • Monitoring and reporting systems • Data synchronization systems • Internal business automation tools • Web applications and admin dashboards • Cloud-based backend infrastructure Clients hire me as a Python developer and Full Stack Developer when they need scalable backend systems, automation workflows, real-time data processing, or production-grade infrastructure that can support long-term product growth. Sportsbook & Betting Systems I have strong hands-on experience building sportsbook software, betting systems, odds aggregation platforms, sportsbook data systems, and real-time betting infrastructure running in production environments. • Real-time sportsbook odds aggregation systems • Arbitrage and positive EV analytics platforms • Betting automation and execution systems • Historical odds databases and backtesting engines • Sports analytics dashboards and reporting systems • Odds monitoring and alerting systems AI Automation & Data Infrastructure • AI data collection pipelines • OpenAI API integrations • AI automation workflows • RAG and knowledge base infrastructure • AI enrichment and structured data processing If you need a Python developer, Full Stack Developer, backend developer, or automation developer who can build scalable backend systems, automation infrastructure, web applications, sportsbook systems, or real-time data products, feel free to reach out.

Ruby on Rails and Vue.js full-stack developer with 8+ years of experience building SaaS platforms, marketplaces, CRM systems, and healthcare applications from scratch. I’ve shipped production systems handling 1M+ monthly transactions, built a pharma analytics platform used by enterprise B2B clients for over 6 years, and delivered Vue.js and Node.js applications for clients across the US, EU, and UK. 🧠 Backend: Ruby on Rails, Ruby, REST APIs, GraphQL, PostgreSQL, MySQL, Redis, Sidekiq, Apache Kafka, JWT, OAuth2, RSpec (90%+ test coverage), Capybara, Swagger 🎨 Frontend: Vue.js, Vue 3, Nuxt.js, Vuex, Pinia, Vue Router, JavaScript, TypeScript, Tailwind CSS, Hotwire, Stimulus, WebSockets, Stripe integrations ⚙️ Infrastructure: Docker, GitHub Actions, AWS S3, Azure, Heroku, Nginx, Capistrano, CI/CD pipelines What this looks like in practice: → Built and maintained REST and GraphQL APIs consumed by Vue.js SPAs with clean architecture, versioning, and full documentation → Optimized complex PostgreSQL queries, improving performance in systems with 1M+ monthly transactions → Migrated CI/CD pipelines from CircleCI to GitHub Actions, reducing costs while maintaining production stability → Implemented Kafka-based event streaming and optimized data flows in microservice-based systems → Integrated Stripe payments and real-time WebSocket features in Vue.js and Node.js / NestJS applications → Refactored and extended legacy Ruby on Rails systems without breaking existing functionality → Maintained 90%+ test coverage using RSpec and Capybara in production-grade systems How I work: I communicate clearly from day one, define scope before development starts, identify risks early, and keep progress transparent throughout the project. I’ve worked both independently on full-stack products and in distributed teams with async workflows. Looking for a Ruby on Rails or Vue.js developer who delivers reliable production systems, not just code commits? Let’s talk.

Want to actually make money from your game and turn your idea into something that brings real value, not just another app that gets ignored? That’s exactly what this is about! Games built here consistently reach 100K+ to 500K+ downloads and generate real revenue for clients, because the focus is not just on development, but on gameplay, retention, and monetization from day one. Most games technically “work” but fail at gameplay, player experience, and long-term engagement. The focus here is simple, not just mobile game development or video game development, but building a game that people enjoy playing and keep coming back to. Everything starts with how the game feels. Before scaling, the core gameplay is shaped - how players interact with the game - how levels are structured - how progression works - and why someone would continue playing after the first session Once that is clear, the game is built in Unity with a strong balance between game design and game development, making sure mechanics, UI/UX, animation, and overall flow work together as one system. From there, the focus shifts to what actually drives growth - performance across Android and iOS devices - smooth gameplay and responsiveness - and systems like rewards, leaderboards, and monetization that support long-term engagement This naturally includes working with Unity, C#, mobile game systems, gameplay mechanics, 2D and 3D environments, animation, UI/UX, and optimization, but always with the goal of building a complete product, not just features. Because in the end - a successful game is not just about launching it’s about - players staying - coming back - and spending time (and money) inside the game If you want to build a game that actually performs - message me, and let’s turn your idea into a real money making machine!

𝗦𝗲𝗻𝗶𝗼𝗿 .𝗡𝗘𝗧 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗖# | 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲 | 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗠𝗩𝗖 I am a Senior .NET Developer with extensive experience building enterprise applications, SaaS platforms, Web APIs, business systems, and scalable backend solutions using C#, ASP.NET Core, ASP.NET MVC, ASP.NET Web API, SQL Server, React, Angular, JavaScript, Node.js, and .NET Framework. 𝗖# 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 * C# Developer * C# Development * C# Backend Development * C# Software Development * C# Enterprise Applications * C# REST APIs * C# Business Applications * C# Architecture * C# API Development * C# Database Integration 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲 * ASP.NET Core Developer * ASP.NET Core Development * ASP.NET Core APIs * ASP.NET Core Web Applications * ASP.NET Core Microservices * ASP.NET Core Backend Development * ASP.NET Core REST APIs * ASP.NET Core Enterprise Systems * ASP.NET Core SaaS Platforms * ASP.NET Core Architecture 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗠𝗩𝗖 * ASP.NET MVC Developer * ASP.NET MVC Development * ASP.NET MVC Applications * ASP.NET MVC Solutions * ASP.NET MVC Enterprise Development * ASP.NET MVC Web Applications * ASP.NET MVC Architecture * ASP.NET MVC Business Systems * ASP.NET MVC Backend Development * ASP.NET MVC Maintenance 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗪𝗲𝗯 𝗔𝗣𝗜 * ASP.NET Web API Development * ASP.NET Web API Services * ASP.NET Web API Integration * ASP.NET Web API Architecture * ASP.NET Web API Backend Systems * ASP.NET Web API Development * ASP.NET Web API Development * ASP.NET Web API Development * ASP.NET Web API Development * ASP.NET Web API Development .𝗡𝗘𝗧 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 * .NET Framework Development * .NET Framework Applications * .NET Framework Maintenance * .NET Framework Integration * .NET Framework Modernization * .NET Framework Enterprise Systems * .NET Framework Architecture * .NET Framework APIs * .NET Framework Backend Development * .NET Framework Solutions 𝗦𝗤𝗟 * SQL Development * SQL Database Design * SQL Optimization * SQL Queries * SQL Performance Tuning * SQL Stored Procedures * SQL Data Modeling * SQL Reporting * SQL Integration * SQL Architecture 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗦𝗤𝗟 𝗦𝗲𝗿𝘃𝗲𝗿 * Microsoft SQL Server Development * Microsoft SQL Server Database Design * Microsoft SQL Server Optimization * Microsoft SQL Server Administration * Microsoft SQL Server Performance Tuning * Microsoft SQL Server Reporting * Microsoft SQL Server Integration * Microsoft SQL Server Data Management * Microsoft SQL Server Enterprise Applications * Microsoft SQL Server Architecture 𝗥𝗲𝗮𝗰𝘁 * React Developer * React Development * React Applications * React Frontend Development * React UI Development * React SPA Development * React Integration * React Dashboard Development * React Enterprise Applications * React Web Applications 𝗔𝗻𝗴𝘂𝗹𝗮𝗿 * Angular Developer * Angular Development * Angular Applications * Angular Frontend Development * Angular Enterprise Applications * Angular UI Development * Angular Integration * Angular SPA Development * Angular Web Applications * Angular Dashboard Development 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 * JavaScript Developer * JavaScript Development * JavaScript Applications * JavaScript Frontend Development * JavaScript Backend Development * JavaScript APIs * JavaScript Integration * JavaScript Web Applications * JavaScript Architecture * JavaScript Development Services 𝗡𝗼𝗱𝗲.𝗷𝘀 * Node.js Developer * Node.js Development * Node.js APIs * Node.js Backend Development * Node.js Services * Node.js Integration * Node.js Applications * Node.js REST APIs * Node.js Enterprise Development * Node.js Architecture 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗗𝗲𝘀𝗶𝗴𝗻 * Software Design * Software Design Architecture * Software Design Patterns * Software Design for Enterprise Applications * Software Design and Development * Software Design and Integration * Software Design Best Practices * Software Design for SaaS Platforms * Software Design for APIs * Software Design for Scalable Systems 𝗢𝘁𝗵𝗲𝗿 𝗦𝗸𝗶𝗹𝗹𝘀 Desktop Application Development, Desktop Application Architecture, Desktop Software Development, Git, Git Workflow Management, Git Version Control, HTML Development, HTML Responsive Design, Bootstrap Development, Bootstrap Responsive UI, Bootstrap Frontend Development. I build scalable SaaS platforms, enterprise software, ASP.NET Core applications, ASP.NET MVC systems, ASP.NET Web APIs, SQL Server databases, React applications, Angular applications, Node.js backends, and high-performance business solutions using C#, .NET Framework, SQL, JavaScript, and modern software architecture principles.

Odoo Development & Support | Custom B2B, B2C, C2C Solutions | Odoo silver partner I'm a Managing Partner at SmartTek Solutions Inc., a custom software development provider specializing in Web Development, Mobile Development, Odoo implementation and certified in delivering complex Odoo consulting services, implementation, and integrations. Core services: ✅ Web Development - HTML, CSS, JavaScript (AngularJS, Ajax, Node.js), PHP, Perl, Python, .NET - MS SQL, MySQL/MariaDB, MongoDB ✅ Mobile Development - ReactJS, ReactNative, native, hybrid, cross-platform (Android, iOS) ✅ Odoo Consulting, Implementation & Development ✔️With us, you can easily hire Odoo developer & Odoo ERP Consultants with 8 years of expertise; ✔️Smoothly launch complex integrations & custom APIs; ✔️Perform advanced migrations, including upgrades to Odoo 18; ✔️Create a customized Odoo Manufacturing MRP with a partner with the strongest expertise in the domain. Odoo modules we excel at: + Accounting + CRM / Sales / Purchases / Inventory/ POS + HR / Recruitment + Odoo website development / eCommerce / Odoo & Shopify integration + Operations & Expenses + Odoo manufacturing … and much more – let us know your needs! ✅ E-commerce Development - Magento, WP WooCommerce, Odoo website development ✅ UI/UX Services - UI wireframing, UX analysis, user experience consulting ✅DevOps & Cybersecurity Services 📌 How experienced am I? I've been serving businesses globally for over 10 years, delivering successful custom solutions since 2015. 📌Which industries do we serve? Our customers operate across diverse industries, including E-Commerce, Digital Marketing, Real Estate, E-learning, Healthcare, Fintech, Fashion, Telecom, and particularly Manufacturing. 📌Who are our customers? We partner with businesses of all sizes: from one-person SMBs to Fortune 500 companies. Clear communication and understanding your requirements are always our top priority. 📌Hourly or fixed-price? Hourly. 📌References Definitely. We worked with 10+ countries. If you're from North America, Europe, Australia, Saudi Arabia, UAE, then I could provide you with a reference from your country or check on smarttek dot solutions. As your tech partner, I prioritize your business success. Me & my team's goal is to transform your vision into reality, enhancing performance and scalability. We offer extensive expertise in software development, from creating simple websites to sophisticated industrial ERPs and e-commerce platforms. Our extensive portfolio demonstrates our proven expertise across multiple industries and technologies. Contact me directly via Upwork to discuss your idea and receive references from satisfied clients worldwide. Let's turn your idea into an exceptional digital solution!

I am an ambitious professional modern WEB and SPA developer with expertise in React and Node.js. So can develop both front-end and back-end. I`m highly involved, add my special touch to everything I do, though my customers' desires are a priority #1. I have worked on a huge amount of projects, with a lot of companies. Now I decided to discover UpWork. I hope that you will look at the experience and skills, but not for the current account creation date or working hours. I keep developing every day and looking for incredible projects and ideas to bring them to life. Also, I have launched a few startups and know not only business needs, but UX/UI too. Looking forward to making a great job!

Full stack web developer delivering investor-ready products with 85% test coverage, low bug density and controlled technical debt ⚡️ 47+ delivered projects across 31 industries ⚡️Products helped raise $141M+ in investments ⚡️85% test coverage, low bug density (0.5 / 1k LOC) ⚡️100% design-to-code accuracy ⚡️Two-week sprints with regular demos ⚡️Regular refactoring and controlled technical debt 💰 Clients raise $3-4M with me as I work with B2B software and SaaS platforms (as React SaaS developer), including legacy systems, helping teams across the US, Canada, UK, Benelux, and Scandinavia redesign products to fix user complaints, improve scalability, and boost productivity. I don’t just write code, I build tools that transform ideas into scalable, secure products that impress users and deliver real business value. My expertise covers the full development cycle - from UX/UI design (web design) to building Web application as a Full stack Web developer, React Web developer, Backend development, Mobile app, to no-code solutions, working as a full stack developer react node on complex SaaS and B2B products. 🔥 My expertise as a React Web Developer and Full Stack web developer includes: I’m a Full Stack Developer specializing in React.js Node.js and the MERN stack (MongoDB, Express, React, Node.js), as a full stack developer react node building scalable SaaS and B2B platforms. I work as a front end developer / react developer, creating seamless, high-performance web applications. Frontend React: I create fast, responsive, and user-friendly interfaces for dashboards, CRMs, and web apps. As a react developer, I ensure tight integration with backend systems. My expertise also includes react js website development, react saas, and react twilio integration for advanced real-time features. Backend Node.js developer: I design scalable architectures, RESTful APIs and server solutions. As a node.js developer and backend engineer, I deliver reliable, production-ready products with clean technical documentation, high performance and maintainable code. My work covers node.js back-end and full react js node js implementation production-ready and reliable. Alongside my core work as a Full Stack Developer React Node / SaaS Web Developer, I also understand how UX design, Laravel Vue, Ruby on Rails and Bubble-based products connect within broader product development workflows. 🔥 Additional Web Development and Mobile Development Skills 💎JavaScript development across front end and fullstack projects, specializing as a Javascript developer ( React Web developer ) 💎Mobile app development using React Native, Flutter and react native for cross-platform solutions. 💎Python backend development, including python developer and python rest api developer, analytics and integrations. 💎Webflow and modern website creation. 💎Full stack javascript solutions covering front end React, backend Node.js and database integration as a MERN stack developer. 💎Payment and third-party integrations using Stripe. 💎Enterprise-level React nodejs applications ensuring security, scalability, and usability. 💎Experienced senior front end developer and java react projects for SaaS and web platforms. 💥I am an experienced React frontend developer I specializing in building responsive, high-performance web applications. As a full stack developer React Node, I combine seamless react frontend interfaces with robust backend engineer solutions, creating scalable, efficient, and user-friendly products, as a full stack developer react node focused on long-term scalability. I understand where a wordpress developer approach makes sense, but for products that need scalable architecture, custom logic, and long-term flexibility, I can also offer a more robust solution with React and Node.js. Guarantee stability, scalability and competitiveness of your products. With support from a full stack web developer, your product can stay aligned with both technical standards and business goals. If you're searching for a senior backend developer node.js or React Web developer, who can help you scale efficiently while aligning with business goals, I’m here to help. 📞 Ready to build a game-changing product? Contact me to discuss your SaaS or Web App and bring your ideas to life efficiently.