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Based on 147 client reviews
Seif Eddine A.

Valencia, Spain

$12/hr
5.0
2 jobs

I am a software engineer with extensive experience in mobile application development. I have worked with a variety of technologies including Flutter, React Native, Ionic, and React, and I am skilled in backend development, utilizing Firebase (including Firebase Authentication, Firestore, Cloud Messaging, Firebase Functions, and more), as well as Node.js with Express. I am also experienced in deploying mobile applications to both the Apple App Store and Google Play Console.

  • React Native
  • JavaScript
  • iOS
  • Flutter
  • MongoDB
  • Node.js
  • Android
  • Mobile App Development
  • Git
  • Ionic Framework
  • Firebase
Oksana K.

Torrevieja, Spain

$35/hr
5.0
7 jobs

๐ŸšจAre you looking for a seasoned Full Stack Developer ๐ŸŒŸ who can transform your vision into a high-performance digital productโ“Look no furtherโ—๏ธWith over ๐Ÿต ๐˜†๐—ฒ๐—ฎ๐—ฟ๐˜€ ๐—ผ๐—ณ ๐—ต๐—ฎ๐—ป๐—ฑ๐˜€-๐—ผ๐—ป ๐—ฒ๐˜…๐—ฝ๐—ฒ๐—ฟ๐—ถ๐—ฒ๐—ป๐—ฐ๐—ฒ ๐Ÿ† I specialize in building robust ๐Ÿฆพ scalable ๐Ÿš€ and intuitive web applications using the latest technologies like ๐—ฅ๐—ฒ๐—ฎ๐—ฐ๐˜.๐—ท๐˜€, ๐—”๐—ป๐—ด๐˜‚๐—น๐—ฎ๐—ฟ, ๐—ฎ๐—ป๐—ฑ ๐—ก๐—ผ๐—ฑ๐—ฒ.๐—ท๐˜€ ๐Ÿ”ฅ๐Ÿ”ฅ๐Ÿ”ฅ โ›‘ ๐—ช๐—›๐—ฌ ๐—ช๐—ข๐—ฅ๐—ž ๐—ช๐—œ๐—ง๐—› ๐— ๐—˜? ๐Ÿš€ ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐˜๐—ถ๐˜€๐—ฒ ๐—”๐—ฐ๐—ฟ๐—ผ๐˜€๐˜€ ๐˜๐—ต๐—ฒ ๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ: Whether it's front-end magic with ๐—ฅ๐—ฒ๐—ฎ๐—ฐ๐˜.๐—ท๐˜€/๐—”๐—ป๐—ด๐˜‚๐—น๐—ฎ๐—ฟ or back-end power with ๐—ก๐—ผ๐—ฑ๐—ฒ.๐—ท๐˜€, I've mastered the full stack. I ensure seamless integration, clean code, and efficient solutions that meet your business goals ๐Ÿ† ๐ŸŒŸ ๐—ง๐—ฎ๐—ถ๐—น๐—ผ๐—ฟ๐—ฒ๐—ฑ ๐—ฆ๐—ผ๐—น๐˜‚๐˜๐—ถ๐—ผ๐—ป๐˜€: I believe in a user-centric approach, tailoring every project to meet your unique needs. From dynamic single-page applications to complex enterprise systems, I deliver solutions that drive success ๐Ÿ‘‘ ๐Ÿ’ช ๐—”๐—ด๐—ถ๐—น๐—ฒ ๐—ฎ๐—ป๐—ฑ ๐—–๐—ผ๐—น๐—น๐—ฎ๐—ฏ๐—ผ๐—ฟ๐—ฎ๐˜๐—ถ๐˜ƒ๐—ฒ: I thrive in agile environments, working closely with clients to ensure their vision is realized at every stage. Transparent communication, iterative progress, and on-time delivery are my top priorities โฑ โ›‘ ๐—ฃ๐—ฒ๐—ฟ๐—ณ๐—ผ๐—ฟ๐—บ๐—ฎ๐—ป๐—ฐ๐—ฒ ๐—ฎ๐—ป๐—ฑ ๐—ฆ๐—ฐ๐—ฎ๐—น๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜†: I build with the future in mind, ensuring your applications are not only fast and responsive but also scalable and maintainable. I'm committed to delivering quality that stands the test of time ๐Ÿ„โ€โ™€๏ธ ๐Ÿ†• ๐—–๐˜‚๐˜๐˜๐—ถ๐—ป๐—ด-๐—˜๐—ฑ๐—ด๐—ฒ ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐—ถ๐—ฒ๐˜€: Staying updated with the latest trends and technologies is key. I constantly refine my skills to leverage the best tools and practices in the industry, including TypeScript, Express, MongoDB, AWS, and more โšœ๏ธ ๐Ÿ† ๐— ๐˜† ๐—ž๐—ฒ๐˜† ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐˜€ ๐—œ๐—ป๐—ฐ๐—น๐˜‚๐—ฑ๐—ฒ: ๐Ÿ† โœ… ๐—™๐—ฟ๐—ผ๐—ป๐˜-๐—˜๐—ป๐—ฑ: React.js, Angular, Redux, HTML5, CSS3, SASS, Bootstrap, Material UI โœ… ๐—•๐—ฎ๐—ฐ๐—ธ-๐—˜๐—ป๐—ฑ: Node.js, Express.js, RESTful APIs, GraphQL โœ… ๐——๐—ฎ๐˜๐—ฎ๐—ฏ๐—ฎ๐˜€๐—ฒ: MongoDB, MySQL, PostgreSQL โœ… ๐——๐—ฒ๐˜ƒ๐—ข๐—ฝ๐˜€: Docker, Kubernetes, CI/CD Pipelines, AWS, Azure โœ… ๐—ง๐—ฒ๐˜€๐˜๐—ถ๐—ป๐—ด: Jest, Mocha, Chai, Cypress ๐Ÿ’ซ ๐•Ž๐•™๐•’๐•ฅ ๐•„๐•ช โ„‚๐•๐•š๐•–๐•Ÿ๐•ฅ๐•ค ๐•Š๐•’๐•ช: ๐Ÿ’ซ ๐Ÿ’ฌ "๐˜ˆ๐˜ฏ ๐˜ฆ๐˜น๐˜ค๐˜ฆ๐˜ฑ๐˜ต๐˜ช๐˜ฐ๐˜ฏ๐˜ข๐˜ญ ๐˜ฅ๐˜ฆ๐˜ท๐˜ฆ๐˜ญ๐˜ฐ๐˜ฑ๐˜ฆ๐˜ณ ๐˜ธ๐˜ฉ๐˜ฐ ๐˜ค๐˜ฐ๐˜ฏ๐˜ด๐˜ช๐˜ด๐˜ต๐˜ฆ๐˜ฏ๐˜ต๐˜ญ๐˜บ ๐˜ฅ๐˜ฆ๐˜ญ๐˜ช๐˜ท๐˜ฆ๐˜ณ๐˜ด ๐˜ฉ๐˜ช๐˜จ๐˜ฉ-๐˜ฒ๐˜ถ๐˜ข๐˜ญ๐˜ช๐˜ต๐˜บ ๐˜ธ๐˜ฐ๐˜ณ๐˜ฌ. ๐˜๐˜ช๐˜ด ๐˜ข๐˜ฃ๐˜ช๐˜ญ๐˜ช๐˜ต๐˜บ ๐˜ต๐˜ฐ ๐˜ฉ๐˜ข๐˜ฏ๐˜ฅ๐˜ญ๐˜ฆ ๐˜ค๐˜ฐ๐˜ฎ๐˜ฑ๐˜ญ๐˜ฆ๐˜น ๐˜ต๐˜ข๐˜ด๐˜ฌ๐˜ด ๐˜ธ๐˜ช๐˜ต๐˜ฉ ๐˜ฆ๐˜ข๐˜ด๐˜ฆ ๐˜ช๐˜ด ๐˜ช๐˜ฎ๐˜ฑ๐˜ณ๐˜ฆ๐˜ด๐˜ด๐˜ช๐˜ท๐˜ฆ." ๐Ÿ’ฌ "๐˜Œ๐˜ง๐˜ง๐˜ช๐˜ค๐˜ช๐˜ฆ๐˜ฏ๐˜ต, ๐˜ณ๐˜ฆ๐˜ญ๐˜ช๐˜ข๐˜ฃ๐˜ญ๐˜ฆ, ๐˜ข๐˜ฏ๐˜ฅ ๐˜ข ๐˜ต๐˜ณ๐˜ถ๐˜ฆ ๐˜ฆ๐˜น๐˜ฑ๐˜ฆ๐˜ณ๐˜ต ๐˜ช๐˜ฏ ๐˜ง๐˜ถ๐˜ญ๐˜ญ-๐˜ด๐˜ต๐˜ข๐˜ค๐˜ฌ ๐˜ฅ๐˜ฆ๐˜ท๐˜ฆ๐˜ญ๐˜ฐ๐˜ฑ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต. ๐˜›๐˜ฉ๐˜ฆ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ซ๐˜ฆ๐˜ค๐˜ต ๐˜ฆ๐˜น๐˜ค๐˜ฆ๐˜ฆ๐˜ฅ๐˜ฆ๐˜ฅ ๐˜ฐ๐˜ถ๐˜ณ ๐˜ฆ๐˜น๐˜ฑ๐˜ฆ๐˜ค๐˜ต๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ๐˜ด." ๐Ÿš€ ๐—ฅ๐—ฒ๐—ฎ๐—ฑ๐˜† ๐˜๐—ผ ๐—•๐—ฟ๐—ถ๐—ป๐—ด ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—ฃ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜ ๐˜๐—ผ ๐—Ÿ๐—ถ๐—ณ๐—ฒ? ๐Ÿš€ Letโ€™s collaborate to build something extraordinary! Whether you need a new web application, a feature upgrade, or technical consultation, I'm here to help. Drop me a message, and let's discuss how we can achieve your goals together ๐Ÿš€๐Ÿš€๐Ÿš€ KEYWORDS: Full-stack development | fullstack developer | web development | React.js | Angular | Node.js | JavaScript | HTML5 | CSS3 | TypeScript | front-end development | frontend developer | back-end development | backend developer | MongoDB | MySQL | PostgreSQL | Express.js | RESTful APIs | GraphQL | Bootstrap | Material UI | SASS | LESS | Redux | Docker | Kubernetes | CI/CD pipelines | AWS | Azure | Firebase | Git | GitHub | Bitbucket | DevOps | Agile development | Scrum | responsive design | single-page applications | SPAs | web apps | cross-browser compatibility | performance optimization | web security | authentication | authorization | JWT | OAuth | JSON | AJAX | WebSockets | API integration | microservices | serverless architecture | cloud computing | MVC architecture | database design | NoSQL | SQL | data modeling | TDD | unit testing | integration testing | Jest | Mocha | Chai | Cypress | Selenium | continuous integration | continuous deployment | code review | code quality | design patterns | MVC | MVVM | version control | object-oriented programming | OOP | functional programming | ES6+ | npm | yarn | package management | web components | PWA | progressive web apps | mobile-first design | UI/UX design | wireframing | prototyping | REST architecture | SOAP | XML | Redux-Saga | Next.js | Nuxt.js | Angular CLI | React Router | server-side rendering | SSR | client-side rendering | CSR | SEO optimization | Webpack | Babel | Gulp | Grunt | software architecture | system design | debugging | troubleshooting | web accessibility | ADA compliance | node js developer | react js node js | node js angular | mongodb node js | backend nodejs | backend nodejs | nodejs developer | react nodejs | nodejs mongodb | typescript nodejs | node.js developer | react.js node.js | backend node.js | node.js aws | vue.js node.js | backend nodejs | react | react developer | react native | react native mobile | react typescript | beta reader | reactjs | reactjs redux | reactjs developer | reactjs typescript | react.js | react.js node.js | react.js developer

  • React
  • JavaScript
  • PHP
  • TypeScript
  • API
  • API Integration
  • Python
  • MySQL
  • Web Development
  • HTML
  • Web Application
  • Web Design
  • CSS
  • HTML5
  • Node.js
Anton C.

Barcelona, Spain

$35/hr
4.9
78 jobs

โญ๏ธ ๐—ฆ๐—ฝ๐—ฒ๐—ฒ๐—ฑ ๐˜„๐—ถ๐˜๐—ต๐—ผ๐˜‚๐˜ ๐—ฐ๐˜‚๐˜๐˜๐—ถ๐—ป๐—ด ๐—ฐ๐—ผ๐—ฟ๐—ป๐—ฒ๐—ฟ๐˜€: working code on time, every time โญ๏ธ ๐—•๐˜‚๐—ฑ๐—ด๐—ฒ๐˜ ๐—ฑ๐—ถ๐˜€๐—ฐ๐—ถ๐—ฝ๐—น๐—ถ๐—ป๐—ฒ: every billed hour is justified โ€” no filler tasks โญ๏ธ ๐—•๐˜‚๐˜€๐—ถ๐—ป๐—ฒ๐˜€๐˜€-๐—ณ๐—ถ๐—ฟ๐˜€๐˜ ๐˜๐—ต๐—ถ๐—ป๐—ธ๐—ถ๐—ป๐—ด: I understand the problem before I write code, so your budget goes into the product, not experiments ๐Ÿš€ React Developer, Full Stack Developer React, Frontend React Developer โ€” specializing in production-ready SaaS platforms, multi-tenant B2B systems, and AI-powered web applications. โญ Top Rated Plus โ€ข 6+ years as a React Developer โ€ข 70+ projects delivered as a Full Stack Developer React Next.js โ€ข 5,000+ Upwork hours as a React Native Developer โ€ข ~70% returning clients as a Frontend React Developer WHY HIRE ME ๐Ÿ“… 6+ years and ๐Ÿ“ฆ 70+ projects mark my work as a Full Stack Developer React Node, building SaaS Platform, MVP, and AI-Powered Web Application solutions. ๐Ÿ” ~70% of clients return โ€” a track record built as a React Developer through partnerships lasting months to years, working as a Frontend React Developer and Full Stack React Developer. โฑ๏ธ 5,000+ Upwork hours logged as a React.js Developer, Node.js Developer, and React Native Developer. โญ Top Rated Plus status reflects steady delivery as a Front End Developer and Nextjs Developer, with a track record of on-time launches. WHERE I DELIVER Working as a Full Stack Developer React Node, I built a multi-tenant B2B SaaS platform with React, Next.js, and Node.js โ€” OWASP-compliant authentication, role-based access control, custom workflow logic, and full Stripe billing (Subscriptions and Connect), backed by PostgreSQL via Prisma with REST and GraphQL APIs on AWS. Building as a React Developer with the OpenAI and Anthropic APIs, I developed an AI-powered SaaS product with React, Next.js, Node.js, and Supabase โ€” RAG pipelines, embeddings, semantic search, real-time streaming, Stripe Checkout billing, and an offline-ready PWA on Vercel. My work as a Frontend React Developer covers two-sided marketplaces, e-commerce platforms, booking and scheduling systems, real-time chat, analytics dashboards, and internal tools. Complex features like authentication flows, payment processing, real-time data, and third-party integrations fall under my Front End Developer work. Deep App Router, Server Components, SSR, SSG, and ISR experience comes from my time as a React Next.js Developer and Node.js Developer, plus API routes and middleware. Core Web Vitals, accessibility, and responsive, cross-browser interfaces are where my Full Stack React Developer background shows. The same product extends to iOS and Android through my React Native Developer work with React Native and Expo. Production-ready code from MVP to scale is what I deliver as a Web App Developer React and React App Developer. REST and GraphQL APIs, authentication flows, and background jobs for high-traffic products come out of my Node js Developer and Full Stack Developer React Node experience. SEO-friendly, fast-loading storefronts and marketing sites come from my React Web Developer and Nextjs Developer work. TECH STACK On the frontend, I build with React, Next.js, and TypeScript, styling with Tailwind CSS and Shadcn/ui and handling state with Redux or Zustand โ€” whatever keeps the codebase easy to hand off. The backend runs on Node.js, usually via Express or NestJS, talking to PostgreSQL through Prisma, or to Supabase and Firebase when a project needs managed auth and real-time out of the box, exposed through REST or GraphQL APIs. I deploy to AWS or Vercel with GitHub Actions running CI/CD, so every push ships cleanly. When a project calls for OAuth, webhooks, transactional email via SendGrid, or automation through Zapier, that comes built into the stack, not bolted on later. MIXED-STACK SUPPORT Python, PHP, Laravel, MySQL, MongoDB, Redis, WordPress, Java, FastAPI, jQuery, and Web3 round out a broader Python Developer, Wordpress Developer, and React Web Developer skill set โ€” and as a Mobile App Developer, I pick up inherited code and mixed stacks quickly. INDUSTRIES SaaS & B2B, AI Startups, Marketplaces & E-commerce, Fintech, Healthtech, Ed-tech, and Real estate โ€” where my React Developer and Full Stack Developer React Node work has landed. WHAT CLIENTS HIRE ME FOR Scalable web applications, secure REST and GraphQL APIs, high-performance Next.js front-ends, and reliable, production-ready SaaS โ€” that's what clients bring me on for as a React Developer, Full Stack Developer React Node, and Frontend React Developer, backed by ๐Ÿ“ฆ 70+ projects, ๐Ÿ“… 6+ years, and ๐Ÿ” ~70% returning clients. Building, scaling, or improving a product? I work as a React Developer, Full Stack Developer React Node, Frontend React Developer, React Native Developer, and Nextjs Developer โ€” let's talk on a quick call. ๐Ÿ‘‡

  • Responsive Design
  • React Native
  • React
  • JavaScript
  • Node.js
  • CSS
  • MongoDB
  • Front-End Development
  • TypeScript
  • Bootstrap
  • HTML
  • PHP
  • Vue.js
  • Web Design
  • Redux
  • CSS 3
  • Python
  • jQuery
  • HTML5
  • WordPress
Mariya S.

Platja d'Aro, Spain

$35/hr
4.6
220 jobs

$1M+ earned on Upwork. 25+ years, 700+ projects, and deep JavaScript/TypeScript expertise across React, Next.js, Node.js & NestJS. I build and scale SaaS, web apps, automation, APIs, and complex platforms from architecture to production. ๐Ÿ‘‹ Iโ€™m a veteran Senior Full-Stack JavaScript/TypeScript Engineer, Full Stack JavaScript Developer, React Developer, Node.js Developer, and Web Developer with 25+ years of experience building scalable web applications, SaaS platforms, automation systems, browser extensions, and enterprise-grade JavaScript products. I work across the full product lifecycle - from architecture and UI development to backend APIs, cloud infrastructure, integrations, performance optimization, and production support. My core stack includes React, React.js, Next.js, Node.js, NestJS, TypeScript, Vue.js, Angular, PostgreSQL, MongoDB, Redis, AWS, Docker, and serverless technologies. Over the years, Iโ€™ve delivered 700+ projects across SaaS, eCommerce, Fintech, Web-to-Print, EdTech, Healthcare, CRM, AI automation, marketplaces, analytics, and enterprise platforms. ๐Ÿ† RESULTS & EXPERIENCE โœ” 25+ years in full stack development and web engineering โœ” 700+ web, SaaS, React, Node.js, and automation projects delivered โœ” Systems handling 10M+ API requests per month โœ” 30+ applications scoring 90โ€“100 in Lighthouse audits โœ” Backend performance improvements of up to 50% โœ” Production experience with startups, scaling products, and enterprise systems โœ” Advanced AWS serverless, event-driven, and real-time architecture โœ” CI/CD and monorepo workflows that accelerate delivery and simplify maintenance โšก FRONTEND / REACT DEVELOPMENT As a Senior React Developer and Frontend Developer, I build fast, maintainable interfaces for SaaS platforms, dashboards, marketplaces, internal tools, and customer-facing applications. My frontend expertise includes: โ€ข React 18, React.js, Next.js 14+, Vue.js, Angular, TypeScript โ€ข SPA, SSR, ISR, PWA, and responsive web application development โ€ข Tailwind CSS, Material UI, SCSS, Bootstrap, and reusable UI systems โ€ข Complex dashboards, analytics interfaces, charts, and data visualization โ€ข Storybook, design systems, reusable component libraries, and UI architecture โ€ข Nx, Turborepo, Module Federation, and micro frontend architecture โ€ข Core Web Vitals, Lighthouse optimization, bundle reduction, and frontend performance โ€ข Mobile-first development and React Native integrations โ€ข Chrome extensions, browser extensions, content scripts, background services, and extension APIs โ€ข Puppeteer, Playwright, browser automation, scraping workflows, and automated testing ๐Ÿ”Œ NODE.JS / BACKEND DEVELOPMENT As a Node.js Developer and Backend Developer, I design scalable APIs and backend systems that support complex business logic, real-time workflows, automation, and high-volume applications. โ€ข Node.js, NestJS, Express, Koa, Hapi โ€ข REST API and GraphQL development โ€ข PostgreSQL, MongoDB, MySQL, DynamoDB, Firebase, Redis โ€ข Prisma, Sequelize, TypeORM, Mongoose โ€ข JWT, OAuth, RBAC, secure authentication, and permissions โ€ข WebSockets, SocketIO, Redis, Kafka, and real-time infrastructure โ€ข BullMQ, AWS SQS, queues, workers, and background processing โ€ข Microservices and event-driven architecture โ€ข AWS Lambda, EventBridge, Step Functions, and serverless systems โ€ข ETL pipelines, analytics processing, and data aggregation โ€ข OpenAI API, Dialogflow, AI integrations, and automation workflows โ˜๏ธ CLOUD, DEVOPS & DELIVERY I build production-ready systems with reliable deployment, monitoring, and scaling workflows. โ€ข AWS, Docker, CloudFront, S3, Vercel, Firebase โ€ข GitHub Actions, GitLab CI/CD, Bitbucket Pipelines โ€ข AWS CDK and infrastructure as code โ€ข Sentry, Datadog, ELK Stack, logging, and monitoring โ€ข Redis caching, database optimization, and cloud cost reduction โ€ข Monorepos with Nx and Turborepo โ€ข Secure deployment and environment management ๐ŸŒ PRODUCTS I BUILD โ€ข SaaS platforms and startup MVPs โ€ข AI-powered products and automation systems โ€ข eCommerce and marketplace platforms โ€ข CRM, ERP, and internal business tools โ€ข Fintech and analytics applications โ€ข Healthcare and EdTech platforms โ€ข Real-time dashboards and reporting systems โ€ข Browser extensions and browser automation tools โ€ข API integrations and workflow automation โ€ข Legacy platform modernization โš™๏ธ CORE TECHNOLOGIES JavaScript, TypeScript, React, React.js, Next.js, Vue.js, Angular, Node.js, NestJS, Express, PostgreSQL, MongoDB, MySQL, Redis, AWS, Docker, Firebase, Vercel, GraphQL, WebSockets, Puppeteer, Playwright, Stripe, OpenAI API, SendGrid, PandaDoc. โœ… LETโ€™S BUILD A PRODUCT THAT CAN SCALE Message me If you need a Senior Full Stack Developer, Full Stack JavaScript Developer, React Developer, Next.js Developer, Node.js Developer, Backend Developer, or Web Developer who can take ownership of both architecture and delivery, Iโ€™d be glad to help.

  • React Native
  • React
  • JavaScript
  • Node.js
  • TypeScript
  • ExpressJS
  • MongoDB
  • Web Application
  • CSS
  • GraphQL
  • Front-End Development
  • Full-Stack Development
  • Redux
  • Next.js
  • PostgreSQL
  • REST API
  • API Integration
  • Python
  • HTML5
  • Vue.js
Joaquin F.

Barcelona, Spain

$27/hr
5.0
1 jobs

๐Ÿš€ Transforming Ideas into Scalable Web Solutions ๐Ÿš€ Hello! Iโ€™m a full-stack web developer with a passion for creating high-performance, scalable, and user-friendly web applications. With extensive experience in Next.js, Vue.js, Node.js, and AWS, I specialize in building everything from responsive landing pages to complex APIs and custom dashboards. My mission is to help startups, small businesses, and marketing teams achieve their goals through innovative, reliable, and efficient web solutions. ๐Ÿ”ง Services I Offer: 1. MVP Development for Startups 2. Landing Page Development Whether itโ€™s for a marketing campaign or your startupโ€™s launch, I create high-converting, responsive landing pages using Next.js/Vue.js. My focus is on driving user engagement and maximizing your ROI. 3. Custom CMS & API Development Need a content management system or custom API? I develop tailored CMS solutions with Next.js & Supabase and robust APIs with Node.js & Express that integrate seamlessly with your existing systems. 4. Dashboard Development Transform your data into actionable insights with custom dashboards built using Vue.js/React.js. I design intuitive, real-time dashboards that empower your team to make data-driven decisions. 5. Performance Optimization & Bug Fixing If your website is running into issues, I offer bug fixing and performance optimization services for Next.js/Vue.js applications, ensuring your site runs smoothly and efficiently. 6. AI and Automation Integration Leverage the power of AI and automation! I develop custom AI chatbots using the OpenAI API and design automated workflows with Zapier/Make, helping you enhance customer engagement and streamline operations. 7. SEO-Optimized Website Development Boost your online presence with SEO-optimized static websites that load quickly and rank high on search engines. Perfect for marketing campaigns that demand visibility and speed. ๐ŸŒŸ Why Work With Me? โ€ข Proven Expertise: I bring years of experience working with cutting-edge technologies like Next.js, Vue.js, Node.js, AWS, and more. โ€ข Startup-Friendly: I understand the challenges of launching a startup and offer flexible, scalable solutions tailored to your needs. โ€ข Results-Oriented: My focus is on delivering high-quality solutions that solve your problems, drive growth, and generate results. โ€ข Communication: I believe in transparent communication and provide regular updates to keep you informed throughout the project. Iโ€™m excited to partner with you to turn your vision into reality. Letโ€™s build something amazing together! ๐ŸŒ Contact me today to discuss your project.

  • React
  • JavaScript
  • Angular
  • Next.js
  • Node.js
  • PHP
  • Tailwind CSS
  • MySQL
  • Vue.js
  • API Integration
  • Artificial Intelligence
  • API
  • Database
  • Supabase
  • Web Development
Aniol C.

Barcelona, Spain

$38/hr
5.0
1 jobs

๐—œ ๐—ต๐—ฒ๐—น๐—ฝ ๐—ฐ๐—ผ๐—บ๐—ฝ๐—ฎ๐—ป๐—ถ๐—ฒ๐˜€ & ๐—ฒ๐—ป๐˜๐—ฟ๐—ฒ๐—ฝ๐—ฟ๐—ฒ๐—ป๐—ฒ๐˜‚๐—ฟ๐˜€ ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ ๐˜๐—ต๐—ฒ ๐—ฏ๐—ฒ๐˜€๐˜ ๐—ช๐—ฒ๐—ฏ๐Ÿฏ ๐—ฝ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜๐˜€ ๐—ฎ๐—ป๐—ฑ ๐—•๐—น๐—ผ๐—ฐ๐—ธ๐—ฐ๐—ต๐—ฎ๐—ถ๐—ป ๐—ฏ๐—ฟ๐—ฎ๐—ป๐—ฑ๐˜€ ๐Ÿ“ˆ ๐˜๐—ต๐—ฟ๐—ผ๐˜‚๐—ด๐—ต ๐—ฆ๐—–๐—”๐—Ÿ๐—”๐—•๐—Ÿ๐—˜ ๐—ฑ๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ ๐—ฎ๐—ป๐—ฑ ๐—ฆ๐—ง๐—ฅ๐—”๐—ง๐—˜๐—š๐—œ๐—– ๐—ฐ๐—ผ๐—ป๐˜€๐˜‚๐—น๐˜๐—ถ๐—ป๐—ด ๐Ÿ”ฅ +175 projects, +20M in revenue, +3M in funds raised ๐—”๐—น๐—น ๐—ผ๐—ณ ๐˜๐—ต๐—ฒ๐—บ ๐˜๐—ฎ๐—ธ๐—ฒ๐—ป ๐˜๐—ต๐—ฟ๐—ผ๐˜‚๐—ด๐—ต ๐—บ๐˜† ๐—”-๐—ญ ๐—ฝ๐—ฟ๐—ผ๐—ฐ๐—ฒ๐˜€๐˜€ ๐˜๐—ผ ๐—ฐ๐—ฟ๐—ฒ๐—ฎ๐˜๐—ฒ ๐˜๐—ต๐—ฒ ๐—ฏ๐—ฒ๐˜€๐˜ ๐˜๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐˜† ๐—ฎ๐—ป๐—ฑ ๐—ถ๐—ป๐—ณ๐—ฟ๐—ฎ๐˜€๐˜๐—ฟ๐˜‚๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ ๐—ฒ๐—ป๐˜€๐˜‚๐—ฟ๐—ถ๐—ป๐—ด ๐˜€๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐˜๐˜† & ๐—ฒ๐—ณ๐—ณ๐—ถ๐—ฐ๐—ถ๐—ฒ๐—ป๐—ฐ๐˜†. ๐ŸŽฏ "๐™‰๐™ค ๐™ฆ๐™ช๐™š๐™จ๐™ฉ๐™ž๐™ค๐™ฃ๐™จ ๐™–๐™จ๐™ ๐™š๐™™, ๐™ฉ๐™๐™ž๐™จ ๐™œ๐™ช๐™ฎ ๐™ž๐™จ ๐™ฉ๐™๐™š ๐™—๐™š๐™จ๐™ฉ ๐™ค๐™› ๐™ฉ๐™๐™š ๐™—๐™š๐™จ๐™ฉ. ๐™„ ๐™๐™–๐™ซ๐™š ๐™™๐™ค๐™ฃ๐™š ๐™– ๐™ซ๐™š๐™ง๐™ฎ ๐™ฉ๐™๐™ค๐™ง๐™ค๐™ช๐™œ๐™ ๐™ง๐™š๐™จ๐™š๐™–๐™ง๐™˜๐™ (๐™›๐™ค๐™ง ๐™ฌ๐™š๐™š๐™ ๐™จ!) ๐™ฉ๐™ค ๐™›๐™ž๐™ฃ๐™™ ๐™– ๐™ง๐™š๐™–๐™ก๐™ก๐™ฎ ๐™œ๐™ค๐™ค๐™™ ๐™—๐™ก๐™ค๐™˜๐™ ๐™˜๐™๐™–๐™ž๐™ฃ ๐™™๐™š๐™ซ๐™š๐™ก๐™ค๐™ฅ๐™ฅ๐™š๐™ง, ๐™–๐™ฃ๐™™ ๐™๐™š ๐™š๐™ญ๐™˜๐™š๐™š๐™™๐™š๐™™ ๐™ข๐™ฎ ๐™š๐™ญ๐™ฅ๐™š๐™˜๐™ฉ๐™–๐™ฉ๐™ž๐™ค๐™ฃ๐™จ 1000%. ๐™‰๐™ค๐™ฉ ๐™ค๐™ฃ๐™ก๐™ฎ ๐™๐™š ๐™ž๐™จ ๐™ซ๐™š๐™ง๐™ฎ ๐™ฅ๐™ง๐™ค๐™›๐™š๐™จ๐™จ๐™ž๐™ค๐™ฃ๐™–๐™ก ๐™–๐™ฃ๐™™ ๐™จ๐™ ๐™ž๐™ก๐™ก๐™š๐™™ ๐™ฌ๐™๐™š๐™ฃ ๐™ž๐™ฉ ๐™˜๐™ค๐™ข๐™š๐™จ ๐™ฉ๐™ค ๐™˜๐™ช๐™จ๐™ฉ๐™ค๐™ข๐™ž๐™ฏ๐™š ๐™จ๐™ข๐™–๐™ง๐™ฉ ๐™˜๐™ค๐™ฃ๐™ฉ๐™ง๐™–๐™˜๐™ฉ๐™จ, ๐™ข๐™ž๐™ฃ๐™ฉ๐™ž๐™ฃ๐™œ ๐™ฌ๐™š๐™—๐™จ๐™ž๐™ฉ๐™š๐™จ, ๐™—๐™ช๐™ก๐™  ๐™ช๐™ฅ๐™ก๐™ค๐™–๐™™๐™จ ๐™ฉ๐™ค ๐™ค๐™ฅ๐™š๐™ฃ๐™จ๐™š๐™–, ๐™จ๐™š๐™ฉ๐™ฉ๐™ž๐™ฃ๐™œ ๐™จ๐™š๐™ง๐™ซ๐™š๐™ง๐™จ ๐™š๐™ฉ๐™˜, ๐™—๐™ช๐™ฉ ๐™๐™š ๐™ž๐™จ ๐™–๐™ก๐™จ๐™ค ๐™ซ๐™š๐™ง๐™ฎ ๐™ฃ๐™ž๐™˜๐™š, ๐™ฅ๐™–๐™ฉ๐™ž๐™š๐™ฃ๐™ฉ, ๐™–๐™ฃ๐™™ ๐™๐™š๐™ก๐™ฅ๐™จ/๐™›๐™ž๐™ญ๐™š๐™จ/๐™–๐™™๐™Ÿ๐™ช๐™จ๐™ฉ๐™จ ๐™™๐™ช๐™ง๐™ž๐™ฃ๐™œ ๐™ฉ๐™๐™š ๐™ฌ๐™๐™ค๐™ก๐™š ๐™ฅ๐™ง๐™ค๐™˜๐™š๐™จ๐™จ. ๐™„ ๐™๐™ž๐™ง๐™š๐™™ ๐™– ๐™™๐™ค๐™ฏ๐™š๐™ฃ ๐™ฅ๐™š๐™ค๐™ฅ๐™ก๐™š ๐™›๐™ค๐™ง ๐™ข๐™ฎ ๐™‰๐™๐™ ๐™ฅ๐™ง๐™ค๐™›๐™š๐™˜๐™ฉ, ๐™–๐™ฃ๐™™ ๐™ฉ๐™๐™ž๐™จ ๐™ฌ๐™–๐™จ ๐™—๐™ฎ ๐™›๐™–๐™ง ๐™ข๐™ฎ ๐™œ๐™ง๐™š๐™–๐™ฉ๐™š๐™จ๐™ฉ ๐™š๐™ญ๐™ฅ๐™š๐™ง๐™ž๐™š๐™ฃ๐™˜๐™š. ๐™๐™๐™–๐™ฃ๐™ ๐™จ ๐™– ๐™ก๐™ค๐™ฉ ๐˜ผ๐™ฃ๐™ž๐™ค๐™ก ๐Ÿ˜€" โญ๏ธโญ๏ธโญ๏ธโญ๏ธโญ๏ธ ๐Ÿ—ฃ Tom Olssen - Vengeaful Beasts ๐Ÿ—ฃ ๐—Ÿ๐—ถ๐—ธ๐—ฒ ๐˜„๐—ต๐—ฎ๐˜ ๐˜†๐—ผ๐˜‚โ€™๐—ฟ๐—ฒ ๐—ต๐—ฒ๐—ฎ๐—ฟ๐—ถ๐—ป๐—ด? ๐—œ๐—ป๐˜ƒ๐—ถ๐˜๐—ฒ ๐—บ๐—ฒ ๐˜๐—ผ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ท๐—ผ๐—ฏ ๐—ผ๐—ป ๐—จ๐—ฝ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜๐—ผ ๐˜€๐—ฐ๐—ต๐—ฒ๐—ฑ๐˜‚๐—น๐—ฒ ๐—ฎ ๐—™๐—ฅ๐—˜๐—˜ ๐—ฑ๐—ถ๐˜€๐—ฐ๐—ผ๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—ฐ๐—ฎ๐—น๐—น ๐˜๐—ผ ๐—ณ๐—ถ๐—ป๐—ฑ ๐—ผ๐˜‚๐˜ ๐—ถ๐—ณ ๐˜„๐—ฒ ๐—ฐ๐—ฎ๐—ป ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ ๐˜€๐—ผ๐—บ๐—ฒ๐˜๐—ต๐—ถ๐—ป๐—ด ๐—ฎ๐—บ๐—ฎ๐˜‡๐—ถ๐—ป๐—ด ๐˜๐—ผ๐—ด๐—ฒ๐˜๐—ต๐—ฒ๐—ฟ. ๐Ÿ”Ž ๐—›๐—ฒ๐—ฟ๐—ฒโ€™๐˜€ ๐˜„๐—ต๐—ฎ๐˜ ๐˜€๐—ฒ๐˜๐˜€ ๐—บ๐—ฒ ๐—ฎ๐—ฝ๐—ฎ๐—ฟ๐˜ ๐—ณ๐—ฟ๐—ผ๐—บ ๐—ฎ๐—ป๐˜†๐—ผ๐—ป๐—ฒ ๐—ฒ๐—น๐˜€๐—ฒ ๐˜†๐—ผ๐˜‚ ๐—ฐ๐—ผ๐˜‚๐—น๐—ฑ ๐—ต๐—ถ๐—ฟ๐—ฒ ๐˜๐—ผ ๐—ต๐—ฒ๐—น๐—ฝ ๐˜†๐—ผ๐˜‚: ๐Ÿ”ธ I deliver exceptional results from the start. Many clients reach out to me after trying less experienced talent or in-house solutions that didnโ€™t meet their expectations. By choosing me, youโ€™re securing a product that will make you proud and run smoothly for years to come. ๐Ÿ”ธ Youโ€™re never reliant on me to stay in control! My development approach emphasizes clear, ongoing communication and transparency. I ensure that you have full ownership and understanding of everything built. ๐Ÿ”ธ Working closely with Blockchain companies has allowed me to establish exclusive partnerships with some of the most prominent names in the Web3 industry. From Marketing, PR, Go-to-Market Strategy, and Tokenomics to NFT Strategy, Legal Structure Setup, VC Fundraising, and KOL, I offer comprehensive expertise. ๐Ÿ”ธ Security is never compromised. Too many times in the Web3 world we see projects getting shattered - funds stolen, servers crashing, trust from users lost. Thatโ€™s why I include thorough quality assurance testing at every stage, with final checks before your product is delivered. ๐—œ๐—ป๐˜ƒ๐—ถ๐˜๐—ฒ ๐—บ๐—ฒ ๐˜๐—ผ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ท๐—ผ๐—ฏ ๐—ผ๐—ป ๐—จ๐—ฝ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜๐—ผ ๐˜€๐—ฐ๐—ต๐—ฒ๐—ฑ๐˜‚๐—น๐—ฒ ๐—ฎ ๐—™๐—ฅ๐—˜๐—˜ ๐—ฑ๐—ถ๐˜€๐—ฐ๐—ผ๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—ฐ๐—ฎ๐—น๐—น ๐˜๐—ผ ๐—ณ๐—ถ๐—ป๐—ฑ ๐—ผ๐˜‚๐˜ ๐—ถ๐—ณ ๐˜„๐—ฒ ๐—ฐ๐—ฎ๐—ป ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ ๐˜€๐—ผ๐—บ๐—ฒ๐˜๐—ต๐—ถ๐—ป๐—ด ๐—ฎ๐—บ๐—ฎ๐˜‡๐—ถ๐—ป๐—ด ๐˜๐—ผ๐—ด๐—ฒ๐˜๐—ต๐—ฒ๐—ฟ. ๐Ÿ”Ž ๐—ฆ๐—˜๐—ฅ๐—ฉ๐—œ๐—–๐—˜๐—ฆ & ๐—ฆ๐—ข๐—Ÿ๐—จ๐—ง๐—œ๐—ข๐—ก๐—ฆ: โœ… Ethereum / Solana / BSC / Polygon (EVM) Customized Smart Contract Development โœ… Blockchain & Web3 Consultation (Smart Contract Ecosystem Design, Tokenomics, Whitepaper) โœ… EVM Smart Contract Audits (Automated Testing, Security Breach Search, Gas Efficiency, etc.) โœ… NFT Collection (ERC721 / ERC721A / ERC1155) creation (Whitelist, Shareholder Dividends, Burn mechanism, Reveal/Unreveal, Access Control, etc.) โœ… NFT Minting Dapps โœ… NFT Staking Contracts + Staking Dapps โœ… ERC20 Tokens (Basic Tokenomics, Staking Features, Buy Limits, Fees, etc.) + ICOs / IDOs โœ… DAOs โœ… NFT Marketplace โœ… Decentralized Exchange (Uniswap / Pancakeswap) โœ… Launchpad (Seedify) โœ… Yield Farming + DeFi Protocol โœ… Image & Metadata Generation Algorithm for NFT Artwork + IPFS Upload โœ… Solana NFT Smart Contract + Minting Dapp (Candymachine, Metaplex) โœ… 2D & 3D Graphic Design, Animations, and Promo Teaser Videos ๐—ง๐—˜๐—–๐—› ๐—ฆ๐—ง๐—”๐—–๐—ž: โœ… Solidity, Hardhat / Truffle / Remix, Slither, Ethereum / Binance / Polygon / Avalanche / Optimism / Solana โœ… React.JS + Next.JS (Web3.JS, ethersJS), AngularJS, HTML, CSS & JavaScript (jquery, Bootstrap) โœ… Node.js, NestJS, ExpressJS, Docker, Python, Amazon AWS, MongoDB, MySQL โœ… Figma, AdobeXD, PSD โœ… Github / Gitlab / Bitbucket, Slack, Trello / Notion / Clickup / Jira ๐—œ๐—ป๐˜ƒ๐—ถ๐˜๐—ฒ ๐—บ๐—ฒ ๐˜๐—ผ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ท๐—ผ๐—ฏ ๐—ผ๐—ป ๐—จ๐—ฝ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜๐—ผ ๐˜€๐—ฐ๐—ต๐—ฒ๐—ฑ๐˜‚๐—น๐—ฒ ๐—ฎ ๐—™๐—ฅ๐—˜๐—˜ ๐—ฑ๐—ถ๐˜€๐—ฐ๐—ผ๐˜ƒ๐—ฒ๐—ฟ๐˜† ๐—ฐ๐—ฎ๐—น๐—น ๐˜๐—ผ ๐—ณ๐—ถ๐—ป๐—ฑ ๐—ผ๐˜‚๐˜ ๐—ถ๐—ณ ๐˜„๐—ฒ ๐—ฐ๐—ฎ๐—ป ๐—ฏ๐˜‚๐—ถ๐—น๐—ฑ ๐˜€๐—ผ๐—บ๐—ฒ๐˜๐—ต๐—ถ๐—ป๐—ด ๐—ฎ๐—บ๐—ฎ๐˜‡๐—ถ๐—ป๐—ด ๐˜๐—ผ๐—ด๐—ฒ๐˜๐—ต๐—ฒ๐—ฟ. ๐Ÿ”Ž

  • React
  • JavaScript
  • Blockchain
  • Blockchain Development
  • Next.js
  • Cryptocurrency
  • Node.js
  • Ethereum
  • Smart Contract
  • Python
  • Solana
  • Solidity
  • NFT
  • API
  • Blockchain Architecture

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