I am a JavaScript Fullstack Developer and Senior Software Engineer with strong, real-world experience building modern web applications and SaaS platforms. I work as a Frontend React Developer, and Node.js Developer on end-to-end web projects. I also work with AWS for scalable deployments when needed. I have strong experience as a Full Stack Developer and a proven track record as a Software Engineer for web-based SaaS applications. I build clean and reliable frontend systems as a React Developer and scalable backend systems as a Node.js Developer. I also work with Next.js for modern, fast applications and have deep experience developing dashboards, SaaS products, and internal tools where the frontend, backend, and APIs work together smoothly. Send me your project details and I will review your scope.

I'm a Full Stack JavaScript Developer with 8+ years of experience, and I've shipped 40+ production web apps that cut client time-to-market by up to 3x. My AI API Integration work has plugged intelligence into 30+ live products, and my AI Web Scraping pipelines pull clean data from 500+ sources for startups, agencies, and growing businesses - turning ideas into reliable, scalable systems that keep working under real traffic. As a Full Stack JavaScript Developer I've delivered 100+ projects across web, SaaS, AI API Integration, and AI Web Scraping, including 20+ production web applications and 15+ multi-tenant platforms that scaled from day one. I bring the complete package - React, Node.js, Python, and modern front-end skills, everything needed to launch and grow your product. WHY CHOOSE ME Hiring a senior Full Stack JavaScript Developer means development cycles up to 3x faster than typical timelines. My AI API Integration experience has connected LLMs, third-party APIs, and automation into products that were never designed for them, shipping 25+ such features into production. My AI Web Scraping systems collect 1M+ records a day while cutting manual data work by up to 90%, and on the sites I've optimized I've cut load times by up to 60%. My roots go wider than one stack: as a full stack java developer I shipped 10+ enterprise backends, and as a wordpress developer I've built and rescued 50+ WordPress sites hitting 90+ PageSpeed scores. FRONTEND ENGINEERING As a Full Stack JavaScript Developer I've built 200+ reusable components that keep interfaces fast and consistent. Users love them, and my front ends render up to 2x faster than the versions they replaced. • React, Next.js, TypeScript, Redux - dynamic UIs with 2x faster rendering • Component-based architecture - 200+ reusable components • Mobile-first, conversion-focused web design BACKEND ENGINEERING As a Full Stack JavaScript Developer I've built APIs that hold 99.9% uptime under real load. My AI API Integration work keeps response times under 200ms even with LLM calls in the loop, and I've delivered 100+ api integrations across payment, CRM, and data providers. • Node.js, Express.js, Python - APIs with 99.9% uptime • MongoDB, PostgreSQL, MySQL - sub-50ms query times • Prisma, Sequelize, Knex.js AI AND INTELLIGENT FEATURES As a Full Stack JavaScript Developer I've wired AI into 30+ existing products with no rebuild required. My AI API Integration work covers the full stack of intelligent features, with 50+ AI API Integration builds shipped to production. As a no code developer I've also automated 60+ workflows in Zapier and Make, saving clients 20+ hours a week. • LLM integration - OpenAI, Anthropic, and open-source models • Natural language processing and chat interfaces • Machine learning pipelines in production • RAG, embeddings, and vector search DATA AND AI WEB SCRAPING My AI Web Scraping stack has powered 40+ data projects with 99% extraction accuracy. My AI Web Scraping pipelines adapt to layout changes and bypass 95% of anti-bot blocks, so they keep running when others break. • Playwright, Puppeteer, and Scrapy at scale - 1M+ pages crawled per run • Structured extraction, deduplication, and scheduled refresh • Anti-bot handling with 95%+ success on protected targets SAAS AND INFRASTRUCTURE My AI Web Scraping workloads run on schedule and process 10M+ records a month without downtime. I bring the same scale-ready infrastructure to every build: • Docker and Kubernetes - 75% faster deployment • CI/CD pipelines - catching 90% of issues early • AWS, Vercel, DigitalOcean expertise • Multi-tenant systems handling 10,000+ accounts without a drop in performance ADVANCED FEATURES • WebSockets - real-time updates within 100ms • Redis caching - 30x faster response times • Stripe integration, OAuth2, JWT authentication WHAT YOU GET • 2-hour response time during working hours • 100% client satisfaction across 100+ completed projects • A developer fully invested in your outcome LET'S BUILD SOMETHING GREAT As a Full Stack JavaScript Developer I've helped 50+ clients ship products that grow, my AI API Integration work has added measurable value to 30+ of them, and my AI Web Scraping systems have saved teams 1,000+ hours of manual research. I'd love to discuss your project.

I'm a Full Stack developer with over five years experience in JavaScript and its frameworks like ReactJS, NextJS, AngularJS, Web-flow, Svelte, etc. I also have experience in back-end technologies like node JS, MongoDB and SQL. I quickly adapt to new technologies. Challenging work excites me, thus anything new and challenging, I am up for it. I have expertise in these libraries too JointJS, React-flow, fabricJS, Canvas, and PWA(Progress Web Applications). ~ If you are looking to build a website, build complex projects, or anything JS, I will get it done for you ! ~ I will be in regular touch with you from taking the brief of the project to it's completion. ~ I am always up for revision and will pay utmost attention to any feedback.

I am an experienced Full-Stack PHP Developer with over 15 years in web development, specializing in PHP, MySQL, JavaScript, OOJS, jQuery, Git, and WordPress. I have extensive experience in developing and maintaining small to mid-sized web applications, as well as troubleshooting and customizing existing solutions. My passion lies in problem-solving, debugging, and delivering high-quality, scalable solutions in both JavaScript and PHP. I hold a science degree along with a three-year diploma in software development. Over the past 10+ years, I have successfully worked as part of distributed teams across multiple locations, collaborating seamlessly in remote work environments. My professional expertise includes: • Version Control & Collaboration: Proficient in Git (GitHub, Bitbucket) for code versioning and collaboration. • Project Management: Experienced in Jira for agile workflow management. • PHP Development: Skilled in PHP (5-8.3)—both core/custom development and frameworks like CakePHP, CodeIgniter, and Laravel. • JavaScript & Frontend Development: Strong knowledge of vanilla JavaScript, jQuery, and Vue.js, with a keen interest in exploring new frameworks. • Team Management: Experienced in leading small teams (2-5 developers), mentoring junior programmers, and ensuring project success. I thrive in remote work environments and am confident that my technical expertise, problem-solving skills, and ability to collaborate across time zones will make me a valuable addition to your team. I would love the opportunity to discuss how I can contribute to your projects. Working Hours / Availability: IST: 10:30 AM - 7:30 AM & 10:30 PM - 2:30 AM For long term contracts can adjust according to requirement. I am also available for free demo tasks, so you can verify my skills. Best regards, Anil Nautiyal

Hey all! Thanks for checking out my profile! Before I get into more about who I am and what I do, I'd like to share a little about the types of clients I'm looking for. I have this dream for what the world could be in the near, and long-term future... and it requires a lot of people working together, being innovative, to turn the world on it's head. To build and create something new and refreshing. To build out tools that improve how we live our every day lives. To generate apps and analytics, and ai tools to improve the mental health epidemic in the United States. The very core of my business, whether through the types of projects I take on, or through the income I make from projects, is to give back as much as I can into different communities to see real change happen... to help develop world changing leaders... to prevent even just 1 suicide... to show young people that there truly is a life worth living - a life of giving back. With that said, here are just a few of my skills... - Over a decade of programming / development work - I'm a TRUE expert in Python & Javascript (My preferred tech-stack for web dev is Django/React) - I'm engineer minded - I can build complex architectures and projects which are very scalable, very quickly and efficiently. - Python (I'm an expert at just about anything Python related) - Javascript - Postgres - AWS - Digital Ocean - Web Dev - Mobile App Dev - AI / Machine Learning - Project Management - Project Engineering - Database Architecture Services I provide: - Tutoring / Mentoring (any age. just about anything related to my skillset above) - Web App Development - Mobile App Development (and PWA's) - Consulting (Database or systems architecture, scalability, etc) Recent Projects: - NFT Crypto Buying/Renting Platform (built form the ground up) - Online Voting Platform (Took on as an existing project. Working to add features and redevelop the architecture of the project) - Youtube Downloader website - Secret Santa mobile app (search "The Secret Santa") - QR Code CRM tool for real estate (search "QRealtor" in the app store) - Web Scraping tools - Lease tracking mobile app (search "MyLeaseBuddy") - Facebook and Google ads automated builder for real estate - Facebook and Google ads automated analytics / real time adjustments for marketing company - Curriculum for a school in Cambodia - Wrote a "getting started with python" book (search "From Zero to Something: Getting Started With Python" on Amazon. 2nd updated edition coming soon). - Converted a voting social media site from Python2 to Python3 - Consulted with a Finance startup on their application and features they needed built out. - Built a multi-merchant purchasing platform with dashboard for sales management. - (Trust me, there's a lot more, but these are the most significant) Feel free to reach out with questions or consideration! - Kyle Volner

As a Senior JavaScript Developer with 12+ years of professional experience, I design and build scalable, high-performance applications that solve real business problems. My expertise spans both front-end engineering and full-stack development, giving me the ability to take projects from concept to deployment with precision and speed. 💡 What I Bring to the Table: • Front-End Excellence: Advanced proficiency in React, Next.js, and TypeScript, delivering clean, responsive, and user-focused interfaces. • Full-Stack Development: Strong backend engineering with Node.js, Express, GraphQL, and REST APIs, including database design and integration (MongoDB, PostgreSQL, MySQL). • Specialized Expertise: Deep knowledge of WebGL, Three.js, WebRTC, and ImageMagick, enabling me to build interactive 3D tools, real-time applications, streaming solutions, and dynamic image-based configurators. • Modern Practices: Experience with CI/CD pipelines, cloud deployments (AWS, Azure, GCP), and containerized environments (Docker). 🚀 Technologies I Work With: JavaScript (ES6+), TypeScript, React, Next.js, Node.js, Express, GraphQL, REST, Three.js, WebGL, WebRTC, ImageMagick, Electron.js, Tailwind, MongoDB, PostgreSQL, MySQL, AWS, Azure, GCP, Docker. 🔹 Over the years, I’ve delivered projects ranging from interactive product configurators and real-time platforms to advanced streaming solutions and large-scale enterprise web applications. Clients value me for being reliable, autonomous, and highly collaborative, someone who can own the full lifecycle of a project and ensure it’s built right, the first time. If you’re looking for a Senior JavaScript Developer who can bridge the gap between sleek UI and robust backend systems, while also bringing advanced 3D, media, and image-processing expertise, let’s connect.

With a Master's degree in Computer Science from Omsk State Technical University (Class of 2012), I bring over 13 years of full-stack web development expertise to the table. My experience spans both front-end and back-end development, with a particular emphasis on Javascript and TypeScript. My foundational understanding of software design, programming principles, design patterns, algorithms, data structures, databases, network protocols, and security empowers me to build applications that are not only fast and efficient but also scalable, maintainable, and secure. Here's a snapshot of the skills I bring to your project: ⚫ SOLID / DRY / KISS / YAGNI ⚫ Javascript / TypeScript ⚫ React / Next.js / Vue / Nuxt.js ⚫ Redux / Thunk / Saga / Redux Toolkit ⚫ Material UI / Tailwind ⚫ Three.js / D3 / chart.js ⚫ HTML5 / CSS3 ⚫ SASS / LESS / Stylus ⚫ Node / Express / Nest.js ⚫ RESTful API / GraphQL ⚫ MySQL / PostgreSQL / MongoDB / Elastic Search / Redis / Firebase / Supabase ⚫ Apache Kafka, RabitMQ ⚫ Webpack / Vite ⚫ Docker / Docker compose ⚫ Git ⚫ Stripe / Snipcart ⚫ AWS / Lambda / S3 / EC2 ⚫ Vercel / Heroku / Digital Ocean ⚫ Agile / Scrum / Kanban A bit more about me: ⚫ I'm proactive and take the initiative to get things done. ⚫ I thrive in a team environment and can comfortably lead when needed. ⚫ I am responsible, reliable, and hold myself accountable. ⚫ I understand the importance of availability and accessibility for clients, and strive to maintain this regardless of my location. My goal is to forge long-term partnerships, ensuring that I consistently deliver high-quality results. I am meticulous in my work on every project, aiming to exceed expectations and ensure client satisfaction. Thank you for considering my profile. I look forward to the potential of working together! 🤘

I have been a professional Senior Full Stack Developer since 2013. During that time, I have coded complex software systems, ranging from booking platform, news aggregator, reporting system, marketplace and keep up to date on the latest practices in coding in Webflow, JavaScript, React.js, HTML, CSS, Bootstrap, Node.js, Nest.js, WordPress, and WooCommerce. I am a part of the Polcode team, a Polish software development company established in 2006 with over 150 developers, designers, project managers, DevOps and QA specialists onboard. This means that besides my programming skills you always have access to a full-stack product design & development team. My technical expertise: - Code quality: Design Patterns, Test Driven Development (Rspec) - Version control system: GIT - Issue trackers: Redmine, Trello, JIRA, Asana My technology stack: - Backend: Webflow, Node.js, Nest.js, PHP 5/7, MySql, WordPress, WooCommerce, MVC - Frontend: Webflow,React.js, Twitter Bootstrap, CSS, HTML, SASS, LESS, JavaScript, React.js, Gatsby.js AJAX - Database Designs and programming: MySQL, PostrgreSQL, GraphQL, MongoDB My approach: - reliability and solidity, - efficiency and speed in problem-solving, - communication and optimal organization of work, - creativity and good advice More about Polcode Polcode provides customized software solutions for startups, SaaS companies, eCommerce stores, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open source technologies and platforms to bring innovation in an agile fashion. Our team excels in PHP, Symfony, Laravel, Magento, Go, React Native, React.js, Vue.js, Ruby on Rails and Angular. With over 150 people, Polcode has either empowered client teams or delivered end-to-end development projects for brands from fintech, manufacturing, consulting, eCommerce, marketing or eLearning industries and is recognized as Top Developer in Poland by Clutch. Looking forward to our cooperation! Konrad, Polcode Dev Team

I'm a full stack JavaScript developer. I have experience working with ReactJS and NodeJS. I'm familiar with the WebExtensions API and I've created a lot of browser extensions. I'm also a Java developer and I'm familiar with the Android SDK.

Hi everyone 👋 I'm a high-skilled (7+ years) Full-Stack Developer. I have 8,000+ hours of a proven track record and 16 completed jobs here on Upwork. Through many projects, I have mastered problem-solving skills and just fell in love with what I'm doing. Creating new products is what brings me much more joy than anything else. I especially like small and big projects that require uncommon approaches and use of the most efficient methods. My skills: — JavaScript/ES6; — Typescript; — Cursor, Claude Code; — Node.js, Express.js; — React.js/Next.js; — Redux/Redux Toolkit/Tanstack-Query/Zustand/React Context; — HTML5, CSS3 and LESS (SASS); — React-Native IOS/Android, Expo; — Material UI, Ant Design, styled-components, Tailwind; — Agile: Jira, Trello, Notion, Linear and Slack; Other: Webpack, REST APIs, Git, Docker, GitHub Actions (CI/CD pipeline). Databases: MongoDB, Mongoose, Firebase/Firestore, Planescale, Supabase, ClickHouse Familiar with: AWS, Electron, Inngest, Redis. I'm open to both part-time and full-time positions, so feel free to send me an invitation any time! You'll be rewarded once we work together :)