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Rating is 4.7 out of 5.
4.7/5
Based on 704 client reviews
John Willie D.

Fort Lauderdale, Florida

$25/hr
5.0
5 jobs

I'm a Full Stack Developer with extensive experience building web applications, SaaS platforms, eCommerce stores, business automation systems, APIs, and mobile applications for startups, agencies, and growing businesses. Over the years, I have worked with companies across multiple industries, helping them launch new products, improve existing platforms, automate workflows, integrate third-party services, and scale their digital presence. Whether you need a complete application built from scratch, additional functionality added to an existing platform, or a technical partner who can guide your project from concept to launch, I can help. I enjoy working on projects where technology solves real business problems. From custom dashboards and SaaS products to WordPress websites and Shopify stores, I bring both technical expertise and practical problem-solving to every project. What I Can Help You Build: Custom web applications designed for scalability, performance, and long-term growth. React.js / Next.js / Node.js / Express.js MongoDB / MySQL / PostgreSQL REST API Development Authentication Systems Admin Dashboards / Business Portals CRM / ERP Systems Custom Software Solutions I help founders and businesses build SaaS products from idea to production. Multi-tenant SaaS Platforms Subscription Systems Stripe Integrations User Management Systems Analytics Dashboards Workflow Automation Customer Portals Custom Business Logic MVP Development Modern businesses rely on software integrations, and I have extensive experience connecting systems together. Third Party API Integrations Custom API Development QuickBooks / Stripe / Payment Gateway Integrations CRM Integrations Webhook Development Data Synchronization Backend Services Cross-platform mobile applications that deliver a seamless user experience. React Native Flutter iOS Applications Android Applications Firebase Push Notifications API Integrations Business Apps Customer-Facing Apps AI-powered applications and automation that bring intelligence to your workflows. Custom AI Chatbots (OpenAI, Claude, Gemini) LLM Integration and Prompt Engineering AI Agent Development Workflow Automation with n8n, Make, or custom solutions Voice AI and Voice Assistant Integration AI-Powered Customer Support and Lead Qualification Document Processing and Summarization AI Content Generation and Categorization Smart Form Fill and Data Extraction Automated Email and Messaging Campaigns Powered by AI Why Clients Enjoy Working With Me: Clear and professional communication Reliable project delivery Strong attention to detail Ability to understand business requirements quickly Clean and maintainable code Problem-solving mindset Long-term partnership approach Fast response times Transparent development process Commitment to quality and performance I understand that hiring a developer is about more than technical skills. Clients want someone they can trust, someone who communicates clearly, takes ownership of the work, and consistently delivers results. That's exactly what I strive to provide on every project. Let's discuss your project and explore the best solution for your business. Keywords Full Stack Developer, Full Stack Development, MERN Stack Developer, MERN Developer, React Developer, React.js Developer, Next.js Developer, Node.js Developer, Express.js Developer, JavaScript Developer, TypeScript Developer, SaaS Developer, SaaS Development, Web Application Development, Custom Software Development, API Development, REST API Development, API Integration, QuickBooks Integration, Stripe Integration, Dashboard Development, CRM Development, ERP Development, Business Automation, Mobile App Developer, React Native Developer, Flutter Developer, Firebase Developer, MongoDB Developer, PostgreSQL Developer, MySQL Developer, Custom Web Applications, Startup Development, MVP Development, eCommerce Development, Full Stack Engineer, Software Engineer, Frontend Developer, Backend Developer, Website Development, Web Development, SaaS Applications, Custom Business Software, AI Chatbot Development, AI Agent Development, AI Automation, n8n Workflow Automation, OpenAI Integration, Claude API Integration, LLM Integration, Voice AI Integration, Conversational AI, Workflow Automation Developer, AI-Powered Automation, Intelligent Document Processing, Smart Data Extraction, AI Lead Qualification, Automated Workflows

  • Node.js
  • MERN Stack
  • React Native
  • Web Application
  • Mobile App
  • Flutter
  • RESTful API
  • AI Chatbot
  • Automation
  • Web Design
  • API Integration
  • Web Development
  • Next.js
  • Payment Gateway Integration
  • WordPress
  • Webflow
  • Shopify
  • Wix
  • Full-Stack Development
  • Ecommerce Website
Abdul B.

East Islip, New York

$60/hr
4.9
177 jobs

Iโ€™m a senior full stack developer with 15,000+ Upwork hours, 150+ completed jobs, Top Rated Plus status, and a strong track record building web apps, SaaS platforms, mobile apps, dashboards, APIs, and business automation systems. My strongest advantage is that I can build both the product and the automation layer around it. That means your project does not get stuck between separate frontend, backend, database, AI, API, and automation freelancers. ๐—”๐—œ ๐—”๐—ด๐—ฒ๐—ป๐˜๐˜€ & ๐—Ÿ๐—Ÿ๐—  ๐—”๐—ฝ๐—ฝ๐˜€ โ†’ AI agents for customer support, internal operations, sales workflows, lead qualification, research, reporting, and document-based tasks โ†’ AI chatbots and assistants built with OpenAI API, Anthropic Claude, LangChain, Retrieval-Augmented Generation, embeddings, vector databases, and custom backend logic โ†’ RAG systems that search company documents, knowledge bases, PDFs, internal data, and structured content with source-aware answers โ†’ LLM-powered features inside SaaS platforms, dashboards, portals, Slack workflows, admin panels, and internal tools โ†’ AI workflows that connect model outputs with CRMs, databases, emails, dashboards, APIs, and business systems ๐—ฆ๐—ฎ๐—ฎ๐—ฆ ๐—ฃ๐—น๐—ฎ๐˜๐—ณ๐—ผ๐—ฟ๐—บ๐˜€ & ๐—™๐˜‚๐—น๐—น-๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ ๐—”๐—ฝ๐—ฝ๐˜€ โ†’ Custom SaaS applications, MVPs, marketplaces, admin dashboards, customer portals, staff portals, booking systems, and reporting platforms โ†’ Frontend and backend development using React, Next.js, Node.js, TypeScript, JavaScript, Python, REST APIs, PostgreSQL, Supabase, Firebase, MongoDB, and cloud-based deployment โ†’ Role-based access, user accounts, dashboards, subscriptions, payment flows, notifications, data management, and admin workflows โ†’ Mobile app backends and cross-platform application systems where web, mobile, database, APIs, and operations need to work together โ†’ Scalable application architecture for products that need to move beyond prototypes and operate reliably in production ๐—ช๐—ผ๐—ฟ๐—ธ๐—ณ๐—น๐—ผ๐˜„ ๐—”๐˜‚๐˜๐—ผ๐—บ๐—ฎ๐˜๐—ถ๐—ผ๐—ป & ๐—”๐—ฃ๐—œ ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€ โ†’ Business process automation using n8n, Zapier, Make, custom APIs, webhooks, scheduled jobs, and backend workflow systems โ†’ CRM automation, lead management workflows, email/SMS automation, reporting automation, data synchronization, and approval workflows โ†’ API integrations with CRMs, ERPs, Stripe, payment gateways, Slack, Google services, email tools, SMS tools, databases, third-party platforms, and custom portals โ†’ Automation layers that reduce manual copy-paste work, remove duplicate data entry, and keep business systems connected โ†’ Internal tools that help teams manage operations, customers, sales, documents, tasks, reports, and workflows from one place ๐—•๐˜‚๐˜€๐—ถ๐—ป๐—ฒ๐˜€๐˜€ ๐—ฆ๐˜†๐˜€๐˜๐—ฒ๐—บ๐˜€ & ๐—œ๐—ป๐˜๐—ฒ๐—ฟ๐—ป๐—ฎ๐—น ๐—ง๐—ผ๐—ผ๐—น๐˜€ โ†’ Operations dashboards, analytics dashboards, admin panels, staff portals, client portals, approval systems, document processing tools, and workflow management platforms โ†’ Systems for teams working across disconnected tools, manual approvals, spreadsheets, shared inboxes, outdated portals, or fragmented reporting โ†’ AI-enabled dashboards and internal systems that help teams see what is happening, act faster, and reduce manual coordination โ†’ Custom business software for healthcare, legal-tech, real estate, travel, e-commerce, education, manufacturing, construction, and service-based companies ๐—˜๐˜…๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ๐˜€ ๐—ผ๐—ณ ๐—ฆ๐˜†๐˜€๐˜๐—ฒ๐—บ๐˜€ ๐—œ ๐—•๐˜‚๐—ถ๐—น๐—ฑ - AI customer support agent connected with your knowledge base, CRM, and internal workflows - SaaS platform with subscriptions, dashboards, user roles, admin tools, and reporting - RAG system for searching documents, PDFs, internal data, and company knowledge - CRM automation that routes leads, updates records, triggers follow-ups, and syncs data across tools - Internal operations dashboard connected to APIs, databases, spreadsheets, and business systems - AI-powered document processing tool for extracting, summarizing, and organizing business information - Booking, marketplace, portal, or mobile backend system with payments, notifications, and admin controls - n8n, Zapier, or Make automation connected with custom backend logic when no-code alone is not enough ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐˜† ๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ React ยท Next.js ยท Node.js ยท TypeScript ยท JavaScript ยท Python ยท PostgreSQL ยท Supabase ยท Firebase ยท MongoDB ยท REST APIs ยท OpenAI API ยท Anthropic Claude ยท LangChain ยท Retrieval-Augmented Generation ยท Vector Databases ยท Embeddings ยท AI Chatbots ยท AI Agents ยท n8n ยท Zapier ยท Make ยท Webhooks ยท Stripe ยท API Integration ยท Workflow Automation ยท SaaS Development ยท Full-Stack Development Iโ€™m a strong fit if you are building a SaaS platform, AI-powered application, AI agent, AI chatbot, RAG system, workflow automation, API integration, CRM automation, internal dashboard, mobile app backend, or custom business system. If you need someone who can think through the architecture, build the product, integrate the tools, add the AI layer, automate the workflow, and take the system from idea to launch, I can help.

  • JavaScript
  • Node.js
  • Full-Stack Development
  • SaaS Development
  • AI Implementation
  • AI Agent Development
  • Generative AI
  • OpenAI API
  • Claude
  • LangChain
  • Retrieval Augmented Generation
  • Chatbot Development
  • Automation
  • API Integration
  • n8n
  • Zapier
  • Make.com
  • React
  • Next.js
  • Python
Hassan Ali K.

Edison, New Jersey

$12/hr
5.0
9 jobs

I am a Full-stack developer having more than 10+ years of experience in building websites and web applications. I have worked to build sites from scratch OR to create additional features for existing ones. I am always on the lookout for exciting projects to work on and smart people to collaborate with! Here you can see the following services I can provide you: ๐Ÿ› ๏ธ Tech Stack Mastery: ๐Ÿ‘‰ Front-end:: --โœ… React.js --โœ… Next Js --โœ… Vue Js --โœ… Tailwind CSS / Bootstrap --โœ… HTML5 --โœ… CSS3 --โœ… SCSS/Less ๐Ÿ‘‰ AI:: --โœ… Open AI --โœ… ChatGPT --โœ… GPT-3 --โœ… AI ๐Ÿ‘‰ Back-end:: --โœ… PHP / Laravel / Livewire --โœ… Node Js --โœ… Express JS --โœ… GraphQL --โœ… JQuery / Javascript ๐Ÿ‘‰ Database Skills:: --โœ… Mysql --โœ… Postgresql --โœ… MongoDB ๐Ÿ‘‰ VCS:: --โœ… GIT / BitBucket / Github / Gitlab ๐Ÿ‘‰ Deployment:: --โœ… AWS --โœ… Digital Ocean ๐Ÿ‘‰ Payment Gateway Integration:: --โœ… Stripe --โœ… PayPal --โœ… Google Pay --โœ… Apple Pay --โœ… Afterpay --โœ… Tillpayments --โœ… Paytm --โœ… Razorpay --โœ… CashFree โ†ช๏ธ Why I Should be best --โœ… 100% client satisfaction. --โœ… Attention to details and 24/7 support across. --โœ… Code quality and performance review. Team leading and mentoring. --โœ… Strong technical skills and business solutions provider. --โœ… Always Open For new challenges and creative ideas. --โœ… Strong organizational, problem-solving, and analytical thinking. --โœ… Fluent in English and learn new skills very fast. I am considering work not only as a way to make a living. but also to build a career here at Upwork. So I tend to seek a long-standing relationship rather than just a quick benefit. Thanks for reading my profile. Looking forward to hearing back from you.c

  • MongoDB
  • Node.js
  • Software Development
  • Web Development
  • Web Application
  • React
  • MySQL
  • Desktop Application
  • Website
  • PHP
  • Laravel
  • Next.js
  • Docker
  • Firebase
  • SaaS Development
Muyiwa F.

Mansfield, Texas

$20/hr
5.0
1 jobs

If you've ever hired a developer who went silent after the deposit, delivered half-baked code, or simply didn't understand your business โ€” this profile was written with you in mind. I'm a Full-Stack Web Developer and AI Integration Specialist with deep expertise in React, Next js, Node js, WordPress, WooCommerce, Laravel, and Python. I help startups, e-commerce brands, and SaaS founders go from idea to fully functional, scalable product โ€” without the stress that comes with hiring the wrong developer. Over the years I've worked across projects ranging from WordPress performance optimization for high-traffic WooCommerce stores, to building multi-tenant SaaS platforms with subscription billing, AI agents, autonomous AI bot development, and real-time dashboards. I've helped businesses scale from zero to significant revenue milestones, and I understand what it takes to build something that not only works today but holds up under real pressure as you grow. What separates me from the hundreds of developers on this platform isn't just the tech stack โ€” it's that I treat your business goals as seriously as the technical requirements. I ask the right questions before writing a single line of code, give regular progress updates so you're never left guessing, and deliver clean, maintainable code that your next developer can actually read What I Build For You: ๐Ÿ”ง Full-Stack Web & SaaS Development React, Next js, Node js, Laravel, PHP, Python โ€” production-ready web development from frontend to backend. Whether it's an MVP you need to validate in 4 weeks or a full SaaS platform with multi-tenancy, role-based access, and subscription billing, I've built it before and I know exactly where the hard parts are. ๐Ÿ›’ WordPress & WooCommerce Development Custom themes, bespoke plugin development, WooCommerce setup, speed optimization, and Core Web Vitals improvements. I've worked on high-traffic stores doing significant monthly revenue โ€” I understand what performance truly means in e-commerce and what's at stake when a page loads slowly. ๐Ÿค– AI App Development, AI Agents & Automation OpenAI API, LangChain, RAG pipelines, AI agent development, AI chatbot and AI bot creation, n8n, Make, and CRM automation workflows. I build intelligent automations and AI-enhanced applications that save your team hours every week. Not AI for the sake of it โ€” but artificial intelligence applied where it genuinely moves the needle for your business. I also offer AI consulting to help you identify exactly where automation creates the most leverage in your operations. ๐Ÿ“ฑ Mobile App Development React Native and Flutter for iOS and Android โ€” cross-platform apps with native-like performance, smooth UX, real-time features, and payment integrations built in from day one. ๐Ÿ”— API Integration & Backend Systems Stripe, PayPal, Twilio, Zoom, Google Maps, OpenAI, Supabase, Airtable โ€” I connect your tools and build the backend API integration logic that makes everything run together, reliably and securely. โšก Performance & Speed Optimization PageSpeed scores, Core Web Vitals, database tuning, advanced caching โ€” slow sites lose revenue. I've turned underperforming stores and web applications into fast, conversion-ready platforms, and I know the exact levers to pull. My Stack: Frontend: React, Next.js, Vue.js, Tailwind CSS, Shadcn UI, Material UI Backend: Node js, Laravel, PHP, Python, FastAPI, Django, Express.js Mobile: React Native, Flutter CMS: WordPress, WooCommerce, Elementor, WP Rocket Databases: PostgreSQL, MongoDB, MySQL, Supabase, Redis, Firebase AI & Automation: OpenAI API, LangChain, n8n, Make com, RAG Pipelines, Pinecone, AI Agent Development Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD Pipelines Payments: Stripe, PayPal, Razorpay, Subscription Billing Auth: OAuth, JWT, Google/GitHub Sign-In, Role-Based Access Control Why Clients Keep Coming Back: I'm here for clients who want something built right the first time, by someone who takes real ownership from kickoff to delivery. I don't disappear. I don't cut corners. And I care about what you're building โ€” not just the ticket I'm closing. If your project matters to you, it'll matter to me. Tell me what you're building and I'll give you an honest answer on how I can help. ๐Ÿ” Keywords: Full Stack Developer, Web Development, React Developer, Next js Developer, Node js Developer, Laravel Developer, WordPress Developer, WooCommerce Developer, SaaS Developer, SaaS Development, MVP Developer, AI App Development, AI Agent Development, AI Bot, AI Chatbot, AI Integration, OpenAI API, LangChain, RAG Pipeline, AI Automation, Artificial Intelligence, AI Consulting, n8n Developer, CRM Automation, Make com Automation, API Integration, Python Developer, FastAPI Developer, Django Developer, React Native Developer, Flutter Developer, Mobile App Developer, REST API Development, GraphQL API, PostgreSQL Developer, MongoDB Developer, Supabase Developer, Redis Developer, AWS Deployment, Docker, Kubernetes, CI/CD Pipeline.

  • JavaScript
  • Node.js
  • Web Development
  • WordPress
  • AI Chatbot
  • SaaS Development
  • Python
  • React
  • AI App Development
  • OpenAI API
  • Next.js
  • CRM Automation
  • Artificial Intelligence
  • AI Consulting
  • API Integration
  • n8n
  • AI Agent Development
  • Automation
  • WooCommerce
Amar A.

Arlington, Virginia

$20/hr
5.0
3 jobs

๐ŸŒŸ Full Stack Developer | MERN/MEAN Stack Expert | Certified Professional ๐ŸŒŸ Are you looking for a skilled Full Stack Developer to bring your project to life? With 7+ years of experience in building scalable high-performing applications, I can guarantee to bring your vision to reality. I specialize in MERN (MongoDB, Express, React, Node.js) and MEAN (MongoDB, Express, Angular, Node.js) stacks. Iโ€™m passionate about creating user-friendly, efficient, and maintainable solutions tailored to your needs. โœ… What I Can Do For You: ๐ŸŒ Back-End Development: โ€ข Develop and optimize RESTful APIs and GraphQL endpoints using Node.js, Express.js, and Nest.js. โ€ข Build robust back-end architectures with secure authentication, role-based access control, and database optimization. ๐ŸŽจ Front-End Development: โ€ข Build dynamic, SEO-friendly web applications using React.js, Next.js, Angular, and TypeScript. โ€ข Design visually appealing, responsive UIs with Tailwind CSS, Material-UI, and Bootstrap. โ˜๏ธ Cloud & DevOps Expertise: โ€ข Architect and deploy scalable solutions on AWS (EC2, S3, Lambda, API Gateway, DynamoDB, RDS). โ€ข Set up CI/CD pipelines with GitHub Actions, GitLab CI, and Jenkins for automated deployments. ๐Ÿ“Š Databases & Storage: โ€ข Design and maintain relational databases (MySQL, PostgreSQL) and NoSQL solutions (MongoDB, DynamoDB). โ€ข Optimize database performance through indexing, caching (Redis), and query optimization. ๐Ÿ’ป JavaScript Excellence: โ€ข Master ES6+ features, async programming, and event-driven architectures. โ€ข Write modular, reusable, and scalable code for maintainable applications. โšก Real-Time Applications: โ€ข Build real-time features like chat apps, notifications, and live updates using WebSockets and Socket.IO. ๐Ÿ›  Technologies I Work With: โ€ข Languages & Frameworks: JavaScript (ES6+), TypeScript, Node.js, Express.js, React.js, Next.js, Angular โ€ข Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD Pipelines โ€ข Databases: MongoDB, MySQL, PostgreSQL, DynamoDB, Redis โ€ข Tools: GitHub, Bitbucket, Jenkins, GitLab CI โ€ข Testing: Jest, Mocha, Cypress ๐Ÿ“Œ Why Hire Me? โ€ข Proven track record of delivering high-quality software on time and within budget. โ€ข Strong focus on scalability, security, and performance. โ€ข Excellent communication skills and the ability to collaborate effectively with teams and stakeholders. ๐Ÿ’ฌ Letโ€™s Collaborate! Whether you need a complete end-to-end solution or enhancements to your existing application, Iโ€™m here to help. Letโ€™s turn your vision into a fully functional, scalable application that drives results! ๐Ÿš€

  • MongoDB
  • JavaScript
  • Node.js
  • AngularJS
  • React
  • Full-Stack Development
  • Next.js
  • NestJS
  • TypeScript
  • GraphQL
  • REST API
  • Websockets
  • Amazon Web Services
  • CI/CD
  • MySQL

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