I help startups and product teams fix unstable mobile apps, improve performance, and scale production systems, including apps with AI features, without breaking existing functionality. Clients usually come to me when their app is already live but facing issues that impact users, stability, or revenue. Common problems I solve: • Frequent crashes, ANRs, and unpredictable app behavior • Slow performance, memory leaks, and poor responsiveness • Payment failures or unreliable API integrations • AI features (chat, recommendations, automation) not working reliably • New features breaking existing functionality • Legacy code that is difficult and risky to modify Results I’ve delivered: • Reduced app crash rates by up to 40% by identifying and fixing root causes • Improved app performance and load times by optimizing memory usage and API handling • Stabilized production apps used by thousands of active users • Resolved critical API, payment, and backend integration issues • Integrated and improved AI-based features within mobile apps What I work on: • Native iOS & Android applications in production • Flutter (cross-platform) mobile apps • AI-powered features (chat, recommendations, automation workflows) • Payment gateway integrations and complex API workflows • Debugging crashes, ANRs, memory issues, and performance bottlenecks • Code refactoring, architecture improvements, and long-term maintainability • App Store & Play Store submissions, updates, and compliance How I work: • I solve root problems, not temporary fixes • I prioritize stability before adding new features • I write clean, maintainable, and scalable code • I leverage modern AI tools to speed up development, debugging, and testing while maintaining high code quality • I communicate clearly and take ownership of delivery • I ensure new changes do not break existing functionality CTA: If your app is facing crashes, performance issues, or unreliable features, send me a quick message with the details. I’ll review your app and suggest the fastest, safest way to fix and improve it.

Full Stack Developer specializing in React.js, Node.js, and Next.js - 5 SaaS platforms shipped to production with real users, real revenue, real traffic. A SaaS delivery system, restaurant POS, AI coaching platform, digital asset manager, and B2B marketplace - all shipped, all running. Built across React, Next.js, Node.js, and the full MERN stack. I work with startup founders and product teams who need clean, scalable full stack development - shipped on time, no handoffs, no excuses. ──────────────────────────────── WHAT I DELIVER ──────────────────────────────── ✔ React.js & Next.js web applications - SaaS, dashboards, portals, marketplaces ✔ Node.js backend development - REST APIs, GraphQL, Express.js, WebSockets ✔ Full stack MERN development - MongoDB, PostgreSQL, TypeScript, Redis ✔ SaaS application development - subscriptions, user auth, multi-tenant architecture ✔ MVP development - production-ready from day one, shipped in weeks not months ✔ React Native mobile apps - iOS & Android ✔ AWS deployments - EC2, S3, Lambda, Docker, CI/CD ✔ API integrations - Stripe, Auth0, OpenAI, Twilio, SendGrid, Webhooks ✔ FastAPI & Python backend - REST APIs, async systems, AI integrations ✔ Performance optimization - load time, scalability, architecture reviews ──────────────────────────────── LIVE PROJECTS DELIVERED ──────────────────────────────── ✔ Raprod - B2B manufacturing marketplace with real-time bidding engine, React + Node.js ✔ Ontrack Careers - mentorship + booking platform handling scheduling, payments, and AWS infra ✔ Rose POS - restaurant kiosk with shift-based cash tracking and Stripe payment flows ✔ Ninja DAM - multi-user digital asset management SaaS, React + ASP.NET + PostgreSQL ✔ Acemmi - AI coaching platform with OpenAI integration, scoring pipeline, React + Node.js ──────────────────────────────── TECH STACK ──────────────────────────────── FRONTEND React.js · Next.js · TypeScript · JavaScript ES6+ · Tailwind CSS · Redux · React Native BACKEND Node.js · Express.js · REST API · GraphQL · WebSockets · FastAPI · Python DATABASE MongoDB · PostgreSQL · MySQL · Redis · Supabase CLOUD & DEVOPS AWS EC2 · S3 · Lambda · Docker · CI/CD · Vercel · Netlify · Linux INTEGRATIONS Stripe · Auth0 · JWT · OpenAI API · Twilio · SendGrid · Webhooks · Third-party APIs SPECIALIZATIONS React.js Developer · Next.js Developer · Node.js Developer · Full Stack JavaScript Developer · MERN Stack Developer · SaaS Developer · MVP Developer · React Native Developer · TypeScript Developer · API Developer ──────────────────────────────── WHY CLIENTS CHOOSE ME ──────────────────────────────── ✔ 100% Job Success Score - Top Rated on Upwork ✔ You'll always know where things stand- proactive updates at every milestone, no chasing required ✔ I don't just fix what you asked - I flag what will break next so you're not back here in 3 weeks ✔ Explained in plain English - no technical jargon when you just need to know if it's done ✔ Available when you need me - fast response, honest timelines, no surprises ✔ Clean, maintainable TypeScript code - built to scale, not just to ship ──────────────────────────────── READY TO START? ──────────────────────────────── Message me with your project. I'll tell you exactly what I'd build, how long it takes, and what it costs. React Developer · Next.js Developer · Node.js Developer · Full Stack Developer · MERN Stack Developer · JavaScript Developer · TypeScript Developer · SaaS Developer · MVP Developer · FastAPI Developer · Python Developer · API Developer · React Native Developer · MongoDB Developer · PostgreSQL Developer · AWS Developer · GraphQL Developer · AI Integration Developer

I build AI-powered apps — mobile and web — that solve real business problems. Expertise in Flutter and Next.js on the front, Supabase (Postgres, Realtime, Edge Functions, RLS) on the back, and AI integration (Claude, OpenAI) throughout. I deliver production-ready apps in weeks, not months. What I bring: real-time data sync (Supabase Realtime), full-stack delivery (Flutter/Next.js to Supabase Postgres to Edge Functions), and seamless AI integrations — LLMs, speech-to-text, image recognition, and face detection. Comfortable with Stripe payments, Firebase, and load testing at scale (50 concurrent users). Recent work: OneMind, a real-time AI consensus platform shipped on both Flutter and Next.js (1,388+ tests); an AI calorie tracker with photo recognition; and a biometric identity system using AWS Rekognition. I currently maintain several production apps for ongoing clients. Let's talk about your project — I respond within hours and scope accurately.

Hi, I’m Khadija, a Full Stack Developer with 5+ years of experience building high-performance web apps and scalable backends using Laravel,Node.js, React.js, and Next.js. I help startups, agencies, and enterprises build secure, fast, and business-driven SaaS platforms, APIs, and admin dashboards. 🔧 What I Do: ✅ SaaS Development – Multi-tenant SaaS apps with Laravel + Next.js ✅ Custom API Development – REST, Graph SQL, 3rd-party integrations ✅ Stripe & Payment Systems – Subscriptions, Webhooks, Connect ✅ Frontend Engineering – Tailwind CSS + React = Fast, responsive UI ✅ DevOps – AWS, Digital Ocean, Vercel, Docker, CI/CD pipelines ✅ Maintenance – Debugging, refactoring, security hardening 💼 Work Experience: 🏢 Codiea.io (2021–2024): Full Stack Developer – Laravel APIs, dashboards, and mobile backends 🚀 Nextwys (Since Nov 2024): Leading backend initiatives for scalable SaaS and system architectures 👩‍💻 Freelance: Built multiple SaaS products & custom platforms used by 50k+ users monthly 🛠️ Tech Stack: Laravel | PHP | Node.js | React.js | Next.js | Tailwind CSS | Bootstrap | MySQL REST APIs | Graph SQL | Stripe | Docker | Vercel | Git ⭐ Client Reviews: ⭐️⭐️⭐️⭐️⭐️ “Rock-solid Laravel API backend. Scaled effortlessly!” – Denis ⭐️⭐️⭐️⭐️⭐️ “Mastered our Stripe Connect logic—business-ready in days.” – Mark ⭐️⭐️⭐️⭐️⭐️ “Great communication and full-stack ownership.” – Muhammad 🔑 Keywords (for Upwork SEO): Laravel Developer, React.js Expert, Next.js Developer, SaaS Developer, Stripe Integration, API Developer, Full Stack Engineer, Backend developer Tailwind CSS, Bootstrap, Docker, Digital Ocean, Web App Developer Frontend developer, API Integration expert, Figma to responsive website, PHP developer 💬 Let’s Talk Looking to launch or scale your app? I’ll help you build a clean, fast, secure platform—from idea to deployment. Let’s turn your vision into results. 📩 Message me today and let’s get started.

I'm one of the highest-rated WordPress developers on UpWork - carrying a "Top-Rated Plus" badge. My priority is delivering projects before deadline and exceeding client expectations. I stay updated with the WordPress/Woocommerce/Ecwid/Shopify framework. EXPERIENCE I have been a fullstack developer for 13 years and I can handle any web development task based on wordpress/woocommerce/PHP/ecwid/shopify/webflow. I have worked with clients at throughout the globe including industry leaders. WHY YOU SHOULD HIRE ME I work under minimal supervision with just instructions from email. Video meetings are required only in complex scenarios. I deliver what I promise and I will let the client know the limitations before starting of the project. ECOMMERCE EXPERT I have worked mostly on e-commerce sites based on woocommerce/shopify/ecwid. I am also listed as expert in Ecwid i.e ecwid.com/experts#coralwebdesigns. LOOK WHAT MY CLIENTS SAY "Kannan is the best person on Upwork, super professional, he deliveres what he tells, more than that actually! It was super funny and a FANTASTIC experience to work with him. If you have any any doubt about him, knock at my door :) " "This is our second time working with Kannan and we highly recommend him. Very professional, very skilled, very competent. Pleasure to work with!" "Hire this guy! His pricing is fair and he does fantastic work. Diligent, reliable, good communicator, etc. I will definitely use him again." "I'd highly recommend Kannan. I am impressed with his knowledge of the WooCommerce platform, and with his comfort level in getting it to do whatever is wanted. He has been a pleasure to work with, even when things weren't going as planned. I used Kannan for 3 jobs already, and recommended him to a fried for a job. I will certainly use Kannan again the next time that I need more custom work." We can discuss about the project and I can even suggest some improvements for free before finalizing. Sounds fair? You can also invite me to your project and I am happy to assist in all your business/technical needs. Kind Regards Kannan

BOOM!!! WE HIT $1M ON COLE WEB APP (I CAN SHOW YOU PROOF) ⭐⭐⭐⭐⭐ "Noah was fantastic to work with He understood exactly what we were trying to build improved our Bubble app architecture and delivered a scalable solution with excellent communication throughout the project I'd gladly recommend him to anyone looking for a Bubble Developer" - Cole Davis, Founder of LHYW I'm Noah, a Bubble Developer who helps founders turn ideas into scalable SaaS products, AI applications, marketplaces, CRMs, and internal business tools I don't just build a Bubble app—I help you launch a product that can survive real users, real growth, and real business demands THE PROBLEM I SOLVE AS A BUBBLE DEVELOPER You aren't looking for a Bubble Developer because you simply want another Bubble app. You're looking for a Bubble Developer because something is standing between your idea and launch. Maybe you need a Bubble MVP built quickly so you can validate your startup before your runway runs out. Maybe you have an AI-generated prototype that looked impressive in a demo but starts breaking the moment real users sign up. Maybe your existing Bubble app has become slow, difficult to maintain, or impossible to scale, and you need a Bubble Developer who knows how to fix the underlying architecture. Or maybe another Bubble Developer started your project, disappeared halfway through, and now you need someone who can understand the existing app and finish it the right way. Whatever brought you here, the goal isn't just to hire another Bubble Developer—it's to work with an experienced Bubble Developer who can solve the problem, build it properly, and set your product up for long-term success. My Bubble Developer process • Bubble Developer Discovery • Bubble Developer Planning • Bubble Developer MVP • Bubble Developer Backend • Bubble Developer Launch Bubble Developer for SaaS Bubble Developer for AI products Bubble Developer for marketplaces Bubble Developer for custom software WHY CHOOSE ME OVER OTHER BUBBLE DEVELOPERS I build products, not demos Many Bubble Developers can make an app look good An experienced Bubble Developer builds software that continues working six months after launch As a Bubble Developer, I focus on scalable databases, maintainable workflows, API integrations, security, performance, and user experience I'm a Bubble Developer who understands startups I help founders validate quickly with a Bubble MVP, then grow into a scalable SaaS platform without rebuilding everything from scratch I'm a Bubble Developer who also specializes in AI OpenAI, ChatGPT, Claude, Make com, n8n, Stripe, OAuth, webhooks, and third-party APIs are part of my daily workflow When you hire me, you're hiring a Bubble Developer who thinks about your business, not just your Bubble app A REAL BUBBLE DEVELOPER PROJECT A founder came to me with an idea for a two-sided marketplace Instead of simply becoming another Bubble Developer building screens, I redesigned the database, optimized the workflows, connected Stripe payments, implemented user authentication, created the admin dashboard, and integrated AI features The result was a scalable Bubble marketplace that could support real users from day one That's what a professional Bubble Developer delivers WHAT I BUILD AS A BUBBLE DEVELOPER • Bubble Developer for SaaS Applications • Bubble Developer for Startup MVPs • Bubble Developer for AI Web Apps • Bubble Developer for Bubble Marketplaces • Bubble Developer for Client Portals • Bubble Developer for CRM Systems • Bubble Developer for Booking Platforms • Bubble Developer for Internal Business Tools • Bubble Developer for Dashboards & Admin Panels • Bubble Developer for Business Automation Apps • Bubble Developer for Custom Web Applications • Bubble Developer for Responsive Web Apps • Bubble Developer for Mobile Responsive Applications • Bubble Developer for AI SaaS Platforms MY BUBBLE DEVELOPER EXPERTISE 🔹 Bubble Developer 🔹 Bubble io Developer 🔹 Expert Bubble Developer 🔹 Bubble Developer for Startups 🔹 Bubble MVP Development 🔹 Bubble SaaS Development 🔹 Bubble Marketplace Development 🔹 Bubble CRM Development 🔹 Bubble Booking App Development 🔹 Bubble Web Application Development 🔹 Bubble AI App Development 🔹 Bubble Backend Workflows 🔹 Bubble Database Setup 🔹 Bubble API Integration 🔹 Bubble Workflow Optimization 🔹 Bubble UI/UX 🔹 Bubble User Authentication 🔹 Bubble Stripe Integration 🔹 Bubble Payment Gateway Integration 🔹 Bubble OpenAI Integration 🔹 Bubble ChatGPT Integration 🔹 Bubble Make com Automation 🔹 Bubble n8n Automation 🔹 Bubble Zapier Automation 🔹 Bubble Client Portal 🔹 Bubble Admin Dashboard 🔹 Bubble Responsive Web App 🔹 Bubble Scalable SaaS App 🔹 Bubble Custom Software Development Message me today and let's build your next Bubble project. Keywords: Bubble Developer, Expert Bubble Developer, Hire Bubble Developer, Bubble Freelancer, Bubble Expert, Bubble MVP, Bubble SaaS, Bubble App Developer

Most businesses don’t fail because of bad ideas, they fail because of slow execution. As a Senior Full Stack Developer, I help teams build and launch scalable web applications without delays, rework, or messy code. With 8+ years of experience as a Full Stack MERN Stack Developer and MEAN Stack Developer who uses AI-assisted workflows to ship production-ready SaaS and web applications faster, without compromising on scalability, security, or clean architecture. My clients typically see 30 to 40% faster delivery compared to traditional development. Where I specialize as a MERN Stack Developer: I work on SaaS platforms, marketplaces, healthcare systems, and API-heavy applications using MongoDB, Express.js, React.js, Node.js, and Angular. As a MERN Stack Developer and MEAN Stack Developer, I’ve built everything from real-time dashboards to multi-tenant SaaS products and workflow automation systems that reduce manual work and improve efficiency. My technical core as a Full Stack Developer MERN Stack Development MongoDB · Express.js · React.js · Node.js · Next.js · REST APIs · GraphQL MEAN Stack Development MongoDB · Express.js · Angular · Node.js Backend (Node.js Developer) API-first architecture · Microservices · Authentication (JWT, OAuth) · Scalable backend systems Frontend (Next, React.js / Angular Developer) Responsive UI · Dashboard development · Performance optimization Cloud & DevOps AWS · Azure · Docker · CI/CD pipelines · Scalable deployments AI-assisted development GitHub Copilot · Cursor AI · Claude AI · OpenAI integrations for automation and intelligent features What working with a MERN Stack Developer like me looks like You’re not just hiring a MERN Stack Developer or MEAN Stack Developer, you’re working with someone who thinks in products, scalability, and long-term value. I focus on understanding your business before writing code, communicate clearly throughout the project, and deliver systems that are easy to maintain, extend, and scale. Recent work (MERN Stack & MEAN Stack Projects) Built a multi-tenant SaaS platform using MERN Stack (MongoDB, Express.js, React.js, Node.js) with role-based access, admin dashboards, and third-party integrations. Developed an AI-powered automation system using Node.js and React.js that reduced manual workflows by 40% through smart API integrations. Created a high-performance dashboard using React.js and Node.js handling thousands of concurrent users with real-time data processing. If you're looking for a MERN Stack Developer, MEAN Stack Developer, or Full Stack Developer who can build, scale, or optimize your product using MongoDB, Express.js, React.js, Node.js, or Angular, let’s connect. Send an invite and let’s build something scalable, fast, and actually worth your investment.

I’m Bablu Kumar, a senior full-stack web developer with 7+ years of experience building scalable platforms, complex systems, and marketplace products that handle real users and real payments. I work with founders who need more than basic development — they need systems that are reliable, extensible, and built for real-world use. My core expertise includes React, Node.js, Ruby on Rails, Laravel, Stripe with advanced payment flows and webhooks, AWS S3, and AI integrations using ChatGPT and OpenAI APIs. I focus on clean architecture, strong coding standards, and maintainable systems so products can grow without constant rewrites or technical debt. I build MVPs that launch fast but are engineered for long-term scale. I’m also a verified Sharetribe expert, bringing deep marketplace experience when required — from payments and workflows to edge cases and platform limitations.

Hello there 🤝 I am a full-stack developer with 6+ years of experience building scalable web apps, SaaS platforms, and AI-powered products from scratch to production. I specialize in both: working as part of engineering teams, contributing to existing codebases and product development and taking full ownership of building applications from idea to production (architecture, development, deployment, and scaling) My focus is always on building real, production-ready software that solves business problems — not just prototypes or demo applications. 🧠 What I build: I help startups and companies design and develop: SaaS platforms (multi-tenant, subscription-based systems) AI-powered web applications and automation tools MVPs for early-stage startups (fast and scalable) Dashboards, admin panels, and internal tools API-driven platforms and client portals Real-time systems and workflow automation tools Tech Stack: Frontend React, Next.js, TypeScript, JavaScript, Redux, HTML, CSS, SCSS, Tailwind CSS, Material UI, Ant Design Backend: Node.js, NestJS, Express.js, REST APIs, GraphQL (Apollo), WebSockets (Socket) Databases: PostgreSQL, MongoDB, MySQL, SQLite, DynamoDB, Supabase, Firebase (Firestore, Realtime DB) Cloud & DevOps: AWS, GCP, Vercel, Cloudflare, Docker, CI/CD (GitHub Actions) Authentication & Integrations: JWT, OAuth2, Auth0, Firebase Auth, Stripe, PayPal, Webhooks AI & Modern Development Tools: I use modern AI-assisted development tools to increase productivity and shipping speed: Cursor IDE Claude Code / Claude AI ChatGPT (OpenAI API integration & engineering assistance) GitHub Copilot AI-assisted debugging, refactoring, and code generation workflows I also integrate AI features directly into products: OpenAI API (GPT-based systems) AI automation workflows intelligent backend logic and assistants inside SaaS products How I work: join an existing engineering team and contribute immediately take ownership of a feature, module, or full product area build applications completely from scratch (architecture → deployment → scaling) I focus on: clean and scalable architecture maintainable and production-ready code performance and system reliability fast and structured delivery Additional expertise: Real-time systems (WebSockets, Socket, Pub/Sub architecture) WebRTC and streaming applications Chrome extensions (TypeScript-based) CMS integrations (Strapi, Contentful) Performance optimization and system refactoring AI-powered automation systems My goal: To help startups and teams turn ideas into scalable software products and AI-powered platforms — and to contribute as a reliable full-stack engineer who can work independently or as part of a product team. If you're looking for someone who can build or scale your SaaS, AI product, or web platform from idea to production - feel free to reach out.

If your app idea is stuck on paper or half-built and broken I can take it live. I'm Ayushi, a Senior Mobile App Developer with 8+ years building iOS, Android, and Flutter apps that actually get shipped to the App Store, on Google Play, and in the hands of real users. My focus is always the same: enterprise-quality code, reliable delivery, and communication that doesn't leave you guessing. 50+ apps delivered across fitness, edtech, SaaS, sports, healthcare, and e-commerce. 🔧 What I build: - iOS apps: Swift, SwiftUI (native, clean, App Store ready) - Android apps: Kotlin, Jetpack Compose - Cross-platform: Flutter/Dart for iOS + Android from one codebase - MVPs for startups that need to move fast and look polished - Full-feature apps with subscriptions, payments, user roles, and API integrations 📱 A few notable apps I’ve built and shipped: 1. Reveal Club: fitness + nutrition app with HealthKit, Stripe subscriptions, calorie tracking, meal plans (iOS & Android, live on both stores) 2. Sports Life Success: 4-role club management app with memberships, game certificates, coach/parent/player flows (iOS & Android, live) 3. TutumNet: mental health self-care app with goal tracking and support network (iOS, live) 4. iPromise: goal accountability app with SMS invites, guest flow and category management (Flutter, Android, live) 5. Thrive: tutor attendance and academic tracking app with time cards and progress reports (iOS, live) 6. Smart Routing: GPS navigation app for courier drivers handling 1000+ waypoints via Mapbox with CarPlay integration ⚙️ Tech stack: - Swift · SwiftUI · Kotlin · Dart · Flutter - Firebase · REST APIs · Alamofire · Retrofit · Stripe · RevenueCat - HealthKit · Mapbox · Push Notifications · Zendesk - MVVM · Clean Architecture · CI/CD · Git · Xcode · Android Studio 🏭 Industries I know well: - Fitness & wellness · Mental health · Sports management · EdTech - SaaS platforms · E-commerce · Logistics · On-demand services ✅ Why clients keep working with me: - I don't just write code I think about the product. I ask the right questions before building. - Clean, maintainable code that your next developer can actually read. - I use AI tools (ChatGPT, Cursor) to work faster but I review, test and own every line. - I work in organised processes Slack/Teams standups, Jira/Asana tracking, regular screen shares. - Realistic timelines. No ghost-acts. Direct communication when blockers come up. If you're a startup that needs a first version shipped fast, a business scaling an existing app, or a solo founder with a great idea send me a message and let's talk about your project. 📩 Message me with your app idea or job description.