Backend Developer Specialist Expert with 8+ years of professional experience in industry, with special expertise below: Language: Nodejs, Nestjs, React, PHP Framework: Featherjs, SailsJs, Loopback, ExpressJS, NestJs, hapijs, fastify, angular, react, electron Design Pattern: MVC, OOP, Methodology: Agile, Scrum, JIRA, Gitflow Tools: Bitbucket, Gitlab, github. Database: mongodb, postgre, mysql, redis, elastic, Firebase Cloud & DevOps: AWS: Cognito, Lambda, EC2, ECS, S3, RDS, Amplify Vercel, Docker, Kubernetes, CI/CD ORMs: TypeORM, Prisma, Sequelize

🎯 Need an expert who can build or optimize your system right, the first time? I’m Mamta Bajaj, a Top Rated Plus developer with $100K+ earned and a 100% Job Success Rate. I specialize in building secure SaaS applications, complex financial architectures, and production-ready AI/LLM application layers without endless revisions or vague timelines. Instead of just writing code, I architect scalable solutions, design secure database schemas, and comfortably step into existing codebases to fix broken payment loops or embed modern AI features. 🤖 AI Applications & LLM Integrations • Agentic Workflows: Designing autonomous backend agents using custom Node.js, Laravel, or Python scripts to automate complex multi-step business logic. • LLM API Integrations: Connecting OpenAI (ChatGPT), Anthropic, and open-source models into consumer web apps for text processing, semantic search, and data extraction. • Data & PDF Analysis: Building secure, Zero-PII browser extensions and backend parsing systems for intelligent document metadata analysis. 💳 Payment & Financial Tech Expertise (Stripe Specialist) • Stripe Connect: Multi-tenant setups, marketplace routing, and split-payment flows. • Stripe Billing: Advanced subscription lifecycles, metered billing, and webhook synchronization. • Cross-Platform: Syncing web checkouts side-by-side with mobile In-App Purchases (Apple/Google). 💻 Core Technical Stack • Backend & API: Laravel (PHP), Node.js, RESTful API architecture, and Supabase. • Database: High-performance MySQL/PostgreSQL schema design, query optimization, and migrations. • Frontend & Automation: React, Angular, Vue.js, n8n, Zapier, and Twilio API integrations. 🚀 Where I Add Immediate Value • SaaS MVP Development: Building and launching clean, reliable products in 3–4 weeks. • Codebase Rescue & Polish: Onboarding fast to existing repos, fixing legacy payment bugs, or cleaning up messy database logic. 📍 Based in Barrie, Ontario (EST). Seamless communication and full timezone alignment with North American clients. Click "Invite to Job" on the right, and let’s get your project shipped cleanly and on schedule.

With 15 years of full-stack development experience, I work across the complete lifecycle of a product, from initial architecture decisions to deployment and ongoing maintenance. I work with startups building their first product, agencies delivering on behalf of clients, and established businesses improving or scaling existing systems. The context changes, but the standard doesn't. => Technical range: Frontend: React.js, Next.js Backend: Node.js, Laravel, PHP, REST APIs Mobile: React Native, Swift, Java DevOps & Cloud: AWS, Docker, CI/CD pipelines Databases: MySQL, PostgreSQL, MongoDB => AI tools I use in my workflow (as per client preferences): GitHub Copilot: accelerated code completion and boilerplate reduction Cursor: AI-assisted development environment for faster iteration Claude: architecture planning, code review, and documentation ChatGPT: rapid prototyping, debugging support, and technical research I use these tools to move faster without compromising on code quality or structure. What stays consistent across every engagement is clear communication, realistic timelines, and no ambiguity about where a project stands at any given point. 100 Job Success Score - Top Rated Plus for Every project delivered. If you have something you're building or improving, I'm happy to discuss about it. Let's connect. Best

Backend Developer Specialist Expert with Node js with 7+ years of professional experience in industry, with special expertise below: Language: Javascript, nodejs Framework: Featherjs, SailsJs, Loopback, ExpressJS, NestJs, hapijs, fastify, angular, react, electron Design Pattern: MVC, OOP, Methodology: Agile, Scrum, JIRA, Gitflow Tools: Bitbucket, Gitlab, github. Database: mongodb, postgre, mysql, redis, elastic Queue: rabbitmq, kafka, redis. AI Agent: claude cli, codex, gemini cli, openspec. AI Integration: gemini api, anthropic api, gpt api, groq, elevenslab. skill experience: Handle multi tenant. Handle multi database and schema in one system. write complex and faster database queries. handle multiple 3rd party Api's integration. create system that can manage multi channel marketplace at one dashboard system. create better and optimized desktop application using electronjs. handle database migration with multiple database and multiple schemas. understanding big system and problem solving. design robust system. microservices. monorepo. nginx. docker. lead a team. caching system. queue system. realtime application. chat system. problem solving. orm coding with AI as a tools or assistant. Spec driven development using open spec. deploy to gcp, aws, vercel, own vps. CRM. ERP. Social Media System. Integrate Payment 3rd.

👋 Hey, My name is Rafay. I have over 7 years of experience as a Software Engineer specializing in full-stack development and solution architecture. I have worked on various projects across different domains, helping businesses solve problems and grow. My expertise covers all stages of the software development lifecycle, from system design to deployment and scaling. Skills: Frontend: React, TypeScript, Next.js, JavaScript Backend: Django, Python, Node.js, Sails.js, Nest.js, Laravel Databases: MongoDB, MySQL, PostgreSQL Cloud services: AWS, GCP Mobile Development: Android, React Native Version Control Systems: Git, GitLab, GitHub, SVN Other: R, PLSQL, Retool I am always eager to learn and improve my skills, ensuring that I can provide the best solutions for your business. Let’s work together to create innovative and effective solutions. Looking forward to collaborating with you!

Hi there! So you're seeking a Web Development Wizard to craft Intuitive User Interfaces and High-Performing Applications to grow your business ? I'm a full-stack javascript/typescript developer and I've been working in this industry for more than 5 years. I specialize in building web/mobile application using technologies such as React, Angular, Nodejs, Next.js, etc. I can help you to build your Backend, Restful APIs, GraphQL API, NodeJS, NestJS backend, web apps such as SPA, PWA, and Landing pages and I have a unique approach to doing this. I know the full picture of a web application from designing a database to the deployment of final product. I'm not saying I'm the best in this industry, but I'm probably the only person who is willing to do these things to you: - Go the extra mile. I'm willing to spend more time thinking carefully about all scenarios of a feature that you want to implement in your application in order to bring the best experience to your user. - I’m not the kind of 9-to-5 person who just waits until 5 pm to shut down the laptop. Working extra hours to help you achieve what you’re looking for is my biggest hobby. - All the applications will be done carefully and perfectly by following a strict timeline. You can see things done week by week. If you have time, you can discuss closely with me every single detail of what you want for your apps. I am excited to bring my extensive skill set and experience to your projects. Let's collaborate and achieve success together! Best regards, Bao CHAU

I'm a professional full-stack developer with 7+ years experiences in developing web applications and RESTful API with NodeJS / Ruby on Rails. As a full-stack developer, I am not only an expert on the backend technologies but I'm also good at single-page frontend frameworks like React, Vue, etc. My main technology stack for developing web applications: - NodeJS with (but not limited to) MEAN, MERN stack, Koa - Ruby on Rails - MongoDB, MySQL, PostgreSQL - Sequelize (ORM for Relational DBMS) - EJS, HAML, SLIM (template engines) - Passport (authentication middleware, include social networks authentication) - JWT (token-based authentication for RESTful API) - AWS EC2, Elasticbeanstalk, RDS, Lambda, API Gateway, etc.

I am a Full Stack Developer with professional experience since 2014, delivering high-quality web, mobile, and AI-powered applications for startups, businesses, and enterprise clients. Throughout my career, I have worked as a Front-End Developer, Back-End Developer, and Team Lead, successfully managing projects from concept to deployment. ## Technical Expertise ### Frontend Technologies * Next.js, React.js, Vue.js, Nuxt.js, Angular, Angular Material * JavaScript, TypeScript, HTML5, CSS3 * Tailwind CSS, Bootstrap, Material UI, Shadcn/UI * jQuery, AJAX, Sass/SCSS * Responsive Web Design * PSD/Figma/XD to Pixel-Perfect HTML * Interactive UI, Animations, and Performance Optimization ### Backend Technologies * Node.js, Express.js, Fastify, Sails.js * Laravel * Php * Python * Golang * REST APIs, GraphQL, WebSockets * Authentication (JWT, OAuth, Session-Based Authentication) * Microservices Architecture * Firebase (Authentication, Firestore, Cloud Functions, Cloud Messaging) * Supabase (Authentication, PostgreSQL, Realtime, Storage, Edge Functions) ### AI & Automation * OpenAI APIs * ChatGPT Integrations * AI Chatbots and AI Assistants * LangChain * Retrieval-Augmented Generation (RAG) * Prompt Engineering * Vector Databases * AI Workflow Automation * Speech-to-Text and Text-to-Speech Integrations * LLM-powered Applications * MCP Servers and AI Tool Integrations ### Databases * MongoDB * PostgreSQL * MySQL * SQLite * SQL * Firebase Firestore * Supabase PostgreSQL * Mongoose * Sequelize ORM * Prisma ORM ### CMS & E-commerce * Shopify (Custom Apps, Theme Development, API Integrations) * WordPress (Custom Themes and Plugins) ### Mobile Development * Ionic Framework * Progressive Web Apps (PWA) ### DevOps & Cloud * Git, GitHub, GitLab * Docker * Nginx * Linux Servers * VPS Deployment * CI/CD Pipelines * PM2 * SSL Configuration * AWS, DigitalOcean, Hostinger VPS * Firebase Hosting * Supabase Platform ## What I Deliver ✔ Clean, scalable, and maintainable code ✔ Modern and intuitive UI/UX experiences ✔ Responsive and SEO-friendly applications ✔ AI-powered solutions and workflow automation ✔ Secure backend architecture with Firebase and Supabase integrations ✔ End-to-end development from concept to deployment ✔ Fast communication and on-time delivery ✔ Long-term technical partnership and support I am currently working as a full-time freelancer and am open to both short-term and long-term collaborations. My goal is to help clients build robust, scalable, and impactful digital products that drive business growth while leveraging modern web technologies, cloud platforms like Firebase and Supabase, and AI capabilities.

I am a full-stack developer and architect with more than 10 years of experience in the IT industry. I'm an expert in web and mobile development using JavaScript (ES5, ES6), TypeScript, Angular, React Native, Node, React, Ionic Framework, Polymer, Express, Firebase Services, MySQL, HTML5, and CSS3. I'm proficient in integrating diverse third-party REST services into the application and adept at quickly mastering new technologies. I have a good command of Node.js and have always delivered high coding standards based on OOPS concepts, experienced with testing frameworks like Mocha and Chai. In Node.js, I have experience in async programming, socketing, Express.js, Nest.js, and LoopBack. In mobile application development, I am an expert in React Native, Ionic, and Flutter, with expertise in integrating third-party APIs, hardware, and plugins. Meanwhile, I have developed such an Ionic application and done more research on Angular, and I actively contribute to the Angular component-based structure and seek to distribute my components on marketplaces. I specialize in real-time applications such as SignalR, Web Socket, and Service Worker implementations. Additionally, I am also familiar with Git, Gulp, Grunt, Browserify, Yeoman, Bower, Polymer CLI, Angular CLI, Ionic CLI, Heroku CLI, React CLI, and more... In the realm of progressive web applications (PWAs) and single-page applications (SPAs), I have conducted significant research on different technologies to understand their limitations and advantages. In socket-based programming, I have worked on Firebase auth, storage, and database with Firebase functions, along with socket-based development using the Twitter Streaming API. I have also worked with various libraries, including... Firebase integration Stripe payment integrations (with Apple Pay, Google Pay, Ali Pay, etc.) DialogFlow integrations Chrome extension Algolia search and Elastic search PouchDB and CouchDB syncing, Supabase SailsJS, NestJS Chrome plugin development Tailwind CSS Phantom.js, Nightmare.js, and Casper.js, web scraping libraries

🏆 𝐄𝐱𝐩𝐞𝐫𝐭 𝐅𝐮𝐥𝐥 𝐬𝐭𝐚𝐜𝐤 𝐖𝐞𝐛 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 | 𝟔+ 𝐘𝐞𝐚𝐫𝐬🏆 🚀MY POSITIVES ✅Full Stack Developer Over 6 Years with AI Expertise ✅𝟏𝟎𝟎% 𝐉𝐒𝐒 & On time Delivery ✅Client Satisfaction & Excellent Retention Rate ✅Top-Rated & Certified Developer ✅Budget-Friendly Solutions ✅Delivering High-Quality Work ✅Fluent in English I’m highly experienced Senior Full-Stack Web Developer based in India, with over 6 years of hands-on experience building robust, scalable, and user-friendly Web App. I specialize in delivering end-to-end solutions tailored to your business needs. 💡 𝐌𝐲 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ✅𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ✔ React.js, Redux ✔ Next.js ✔ TypeScript ✔ HTML5, CSS3, ✔ JavaScript ✔ Bootstrap ✔ Tailwind CSS ✅ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ✔ Node.js ✔ Express.js ✔ NestJS ✔ Cron Jobs, ✔ Sails.js ✔ Open AI API ( Chat GPT, GPT4, Gemini, Whisper and many more) ✅ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭: ✔ MySQL ✔ MongoDB ✔ PostgreSQL ⭐️𝐎𝐭𝐡𝐞𝐫 𝐓𝐞𝐜𝐡 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 & 𝐒𝐤𝐢𝐥𝐥𝐬⭐️** ✅ Experience with third-party libraries and RESTful APIs Integration. ✅ 𝐎𝐩𝐞𝐧 𝐀𝐈 𝐀𝐏𝐈 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐜𝐮𝐬𝐭𝐨𝐦 𝐌𝐨𝐝𝐞𝐥 𝐭𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐮𝐬𝐢𝐧𝐠 𝐀𝐈/𝐌𝐋. ✅ 𝐂𝐥𝐨𝐮𝐝 𝐏𝐫𝐨𝐯𝐢𝐝𝐞𝐫𝐬 : AWS, Azure, Digital Ocean, and GCP. ✅ 𝐂𝐡𝐚𝐭 & 𝐀𝐮𝐝𝐢𝐨/𝐯𝐢𝐝𝐞𝐨 𝐜𝐚𝐥𝐥𝐢𝐧𝐠 : Socket, Firebase, Get Stream, Twilio, Agora and JISTI. ✅ 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 : Live database, Fire store, Functions, Analytics, Ad mob integration and Notifications. ✅ 𝐏𝐚𝐲𝐦𝐞𝐧𝐭 𝐆𝐚𝐭𝐞𝐰𝐚𝐲 : PayPal, Stripe, Razor Pay, In-App purchase with Google and Apple Pay ✅ QR Codes, Bar Codes, VIN, NFC Tags Reading ✅ 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 & 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 : Amazon AWS, Firebase, Docker ✅ 𝐂𝐨𝐝𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐯𝐞𝐫𝐬𝐢𝐨𝐧 𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐢𝐧𝐠 : GitHub, Bitbucket, GitLab ✅ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐭𝐨𝐨𝐥 : Slack, Jira, Trello & Notion 🚀𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? 🔹 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 – I can develop complete web applications from scratch. 🔹 𝐂𝐥𝐞𝐚𝐧, 𝐌𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐚𝐛𝐥𝐞 𝐂𝐨𝐝𝐞 – I follow best practices to ensure scalable and efficient solutions. 🔹 𝐏𝐢𝐱𝐞𝐥-𝐏𝐞𝐫𝐟𝐞𝐜𝐭 & 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐃𝐞𝐬𝐢𝐠𝐧 – I create modern, intuitive, and mobile-friendly UIs. 🔹 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 – Ensuring fast, secure, and optimized applications. 🔹 𝐎𝐧-𝐓𝐢𝐦𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐲 – Meeting deadlines without compromising on quality. 🔹 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐭 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 – Clear and professional collaboration throughout the project. If you're looking for a skilled and dedicated developer to bring your ideas to life, let's connect! I'd love to explore how I can contribute to your project. 📩 Let's collaborate and create something amazing whether you're building a website, mobile app, or integrating complex APIs, I'm here to help you bring your vision to life. 𝐬𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐭𝐨𝐝𝐚𝐲!