🏆 Upwork TOP RATED PLUS (Top 3%) 🏆 3500+ Hours on Upwork 🏆 Full-Stack Mobile Engineer Are you building a mobile app that needs to perform in the real world — not just look good in a demo? Most apps struggle after launch because the foundation isn’t built right. I focus on building complete mobile products — where UI, backend, APIs, and integrations are designed together — so your app stays stable, scalable, and ready for growth from day one. 📱 Mobile App Development (Native + Cross-Platform) Native • iOS – Swift / SwiftUI • Android – Kotlin / Java Cross-Platform • Flutter • React Native I choose the right approach based on performance, scalability, and product goals — not just trends. ⚙ Backend & System Architecture • Node.js / Express • Laravel (PHP) • Firebase / Firestore / Supabase • REST APIs & WebSocket-based systems • Authentication (JWT, OAuth, secure flows) Backend systems are built to support real users, not just testing environments. 🔗 Integrations & Advanced Capabilities • Payment systems (Stripe, Razorpay, PayPal) • Push notifications & real-time communication • Google Maps, geolocation & tracking • Media upload, compression & streaming • Third-party APIs & enterprise integrations 🤖 How I Use AI (Practically) I use AI where it actually improves outcomes — not just for hype: 1️⃣ AI-powered features inside apps (chat, automation, personalization) 2️⃣ AI-assisted development tools: • Claude – architecture & debugging • GitHub Copilot – faster, cleaner coding • Cursor – real-time code refinement • ChatGPT / OpenAI – testing, logic validation • Replit – rapid working prototypes This results in faster delivery, cleaner builds, and fewer issues later. 🎯 Product Thinking & UI/UX • Figma to production-ready apps • Scalable design systems • Smooth animations & micro-interactions • User flows built for engagement and retention 🚀 What You Get ✔ End-to-end ownership (Idea → Launch → Scale) ✔ Clean, scalable, and maintainable codebase ✔ Reliable performance across iOS & Android ✔ App Store & Play Store deployment support ✔ Long-term collaboration — not just one-off delivery If you’re looking for someone who can take full responsibility for your mobile app — from concept to scale — let’s connect. 📩 Open to discussing your project anytime. 🔑 𝐊𝐄𝐘𝐖𝐎𝐑𝐃: Flutter, Flutter App, Flutter Developer, Flutter Firebase, Dart, Firebase, Swift, Xcode, Interface Builder, UIKit, SwiftUI, Core Data, Auto Layout, App Store Connect, Cocoa Touch, Push Notifications, RESTful APIs, In-App Purchase, App Extensions, TestFlight, Mobile Apps, Firebase, Apple Pay, iPhone Apps, Android Apps, Hybrid Mobile Apps, Senior Mobile Developer, Mobile Apps Developer,Swift, Xcode, Interface Builder, UIKit, SwiftUI, Core Data, Auto Layout, App Store Connect, Cocoa Touch, Push Notifications, Cocoapods, HealthKit, Core Animation, Localization, mobile app development, mobile app design, mobile ui ux designer, mobile, android developer, android, android kotlin, android reverse engineer, ios developer, ios swift, ios app, flutter ios, flutter android, no SQL, rest apis php/laravel backend, Google Map, Google Map Api, Ios Android, Ios App Developer, Ios Developer

I am a .NET Full Stack Developer with more than 13 years of experience. I have a solid understanding of designing and developing enterprise applications using Microsoft Tech Stack Web Technologies: .Net Core, Blazor, Asp.net MVC, ASP.NET Web Forms, React, Redux, HTML5, CSS3 Programming Languages: C#, JavaScript Cloud Platforms: Microsoft Azure and AWS Microservices:.Net 8.0, Web API and Web Services Database: MS SQL Server, Entity Framework, MYSQL, Redis Cache, Azure Cosmo DBVersion Control: Bitbucket, Git, Jira DevOps: Azure DevOps, CI/CD Agile Methodologies: Scrum Problem Solving and Analytical Skills Mobile : Cordova/Phonegap Repositories: API: Amazon, Facebook, Google API's While I am certain there will be others who underbid me on this project, I can assure you several things. I work extremely fast I have a great design sense for corporate design I am an Indian and a native English speaker. This means I can ensure quality communication in regards to the project. My suggestions for your project to run successfully: 1. Use source control for version management 2. Use Task tracker/bug tracker to efficiently manage the milestones and deadlines 3. Communicate expectations before the project begins Thank you and I look forward to the opportunity to work with you.

Hi there, I'm Hendra, Full-Stack Web developer with proven experience in developing robust web applications and payment systems. Expertise spans across backend development, API creation, and team collaboration, ensuring high security, performance, and compliance standards. Proficient in SQL, HTML & CSS, and JavaScript, with a solid foundation in various technologies, including Ruby on Rails, Vue.js, Next.js and many more. Passionate about leveraging a full-stack skill set to deliver innovative solutions and elevate project outcomes while continuously embracing new technologies and methodologies. Ready to contribute to a forward-thinking team dedicated to impactful web development. Highly interested with Web development (both backend and front-end), building REST API. GraphQL API, Marketplace, Payment system, CRM / SaaS system and more. Also a startup enthusiast, to help and grow up together with the lovely startup companies. I'm highly adaptable to working on many industries / startup businesses across the countries. My favorite stacks: ✅ Ruby on Rails ✅ NodeJS / Express.js ✅ Vue.js ✅ Next.js ✅ Bootstrap / Tailwind for CSS ✅ Hotwire & Stimulus for Front-end more dynamic ✅ ElasticSearch for fulltext search engine ✅ SQL (Postgresql & MySQL) ✅ MongoDB ✅ Retool (for building frontend system with less code) Key Qualifications: ⭐ Focus on Quality, Reliability and Security performance ⭐ Fast learning, I can adapted quickly and learning the existing system ⭐ Focus on web development, and mobile friendly ⭐ Hard worker, organized, attention to details and a adaptable with team, and love to learn new tech ⭐ Love to learn new things ⭐ Good communication with team

I build production AI systems for US startups and SMBs that hold up under real load: multi agent pipelines, RAG systems, and LLM powered platforms with paying users. Not demos that break the first time a real prompt hits them. Most clients come to me after a previous developer shipped something that hallucinated in production, fell over under traffic, or could not be maintained. I focus on the engineering side of AI: clean architecture, proper error handling, evaluation pipelines, and systems that survive edge cases and weird user input. Recent work: - AI call analysis pipeline processing 150K+ calls per day - Multi agent trading system running live on Binance with real capital - LangGraph multi agent pipelines with sandboxed code execution and automated evaluation - RAG systems for accuracy critical use cases with hybrid search and re ranking - Voice AI for appointment setting and lead qualification What I build: - Multi agent systems with LangGraph and LangChain: orchestration, state management, tool calling, human in the loop - RAG pipelines with Pinecone, ChromaDB, PGVector, or FAISS, including hybrid search and re ranking - n8n and Make automations wired into LLMs, CRMs, and internal APIs, with retry logic and proper error handling - Python backends with FastAPI and PostgreSQL powering AI driven SaaS - Voice AI using VAPI and Bland AI for inbound calls and qualification Stack: Python, FastAPI, PostgreSQL, LangGraph, LangChain, n8n, Make, OpenAI, Claude, Gemini, Pinecone, ChromaDB, PGVector, FAISS, Supabase. How I work: I scope before I build, write code the next engineer can actually read, and document what I deliver. I respond within a few hours during US business hours and ship in tight iterations instead of disappearing for two weeks. If you are building an AI agent, RAG system, or LLM powered platform and want it done properly the first time, send me a message with what you are working on and I will tell you honestly whether I am the right fit.

🚀 Specialist in Karenderia, Food Delivery Apps, Flutter & Laravel Development I help businesses and startups launch powerful food delivery platforms and custom apps using Karenderia, Flutter, and Laravel. Whether you're starting from scratch or need expert customization of a pre-built app, I bring deep expertise and professional quality to every project. With a BS in Software Engineering and years of hands-on development experience, I provide full-cycle services — from project planning and design to development, deployment, and long-term support. 💼 My Core Expertise Includes: 🔹 Food Delivery & On-Demand Apps: Karenderia App Setup & Deep Customization Customization of CodeCanyon or marketplace apps (food delivery, eCommerce, etc.) 🔹 Mobile App Development: Flutter (Cross-platform) Android (Native) iOS & Android Hybrid Apps 🔹 Web Development: Laravel (Full-stack web apps, APIs) Vue.js, Angular, Next.js Core PHP PHP Frameworks (CodeIgniter, OpenCart, CakePHP, Yii) WordPress (Custom Themes & Plugins) 🔹 Project Initialization (INIT): Clean codebase setup Git version control Local & production environment configuration 🔹 Integrations: REST APIs & third-party APIs Payment Gateways (PayPal, Stripe, Razorpay, etc.) 🔹 Additional Frontend Skills: React.js 🎓 Education: BSSE – Software Engineering, COMSATS University Islamabad

I help startups go from idea to live product. With 4+ years building full-stack web apps and AI-assisted development workflows using Claude and Cursor, I consistently deliver in days what used to take weeks. My clients get working products, not just code. I've shipped real products across travel tech, fintech, and SaaS including a two-sided travel marketplace and a full hotel management ecosystem with 5 integrated products, and MVPs deployed live on Vercel, Render, and Neon. What I build: → SaaS platforms & internal tools (Vue/Nuxt, Golang, Supabase) → AI-powered features & workflow automation → MVPs that are production-ready from day one → Dashboards, admin panels & real-time apps I don't just execute tickets. I think about architecture, user experience, and long-term maintainability then ship it quickly. If you need someone who takes ownership and delivers, let's talk.

👋 Need a Front end Developer React who can take ownership of your product and deliver polished, production-ready experiences? I'm a Top Rated Front end Developer React with 15+ years of commercial experience building SaaS platforms, dashboards, customer portals, and modern web applications. With $200K+ earned, 5,300+ hours worked, 31 successful projects delivered, and a 100% Job Success Score, I focus on creating scalable solutions that combine excellent user experience with maintainable architecture. As a React Full Stack Developer, I've helped clients across 15+ countries transform ideas into successful products and scalable platforms. I've contributed to applications ranging from startup MVPs to enterprise solutions serving more than 5 million end-users worldwide. I've built 30+ mobile applications used by millions, SaaS products, and streaming platforms delivering real-time video and audio experiences across multiple markets. As a React Full Stack Developer and Full Stack Developer React Node.js, I contribute across the product lifecycle—from frontend architecture and user experience to backend integrations and feature delivery. Having delivered 30+ projects, my experience as a Full Stack Developer React Node.js allows me to support complex business requirements while building reliable systems designed for growth. 🏆 Why Clients Work With Me Top Rated with 100% Job Success 15+ years of commercial development experience $200K+ earned on Upwork 5,300+ hours worked 31 successful projects delivered Products serving 5M+ end-users Clients across 15+ countries Product ownership Scalable solutions Reliable delivery As a React Full Stack Developer, I focus on delivering practical solutions that balance technical excellence with real business objectives. 🚀 Services 📌 Front End Development As a Front end Developer React Node.js, I build responsive, high-performance applications using React, Next.js, TypeScript, and modern frontend practices. Dashboards & Admin Panels Customer Portals Internal Tools Responsive Web Applications Reusable UI Systems Frontend Architecture & Refactoring 📌 Full Stack Product Development As a React Full Stack Developer and Full Stack Developer React Node.js, I work with growing teams to build SaaS products, MVPs, and business applications. SaaS Platforms MVP Development Feature Development Product Modernization Technical Discovery End-to-End Implementation 📌 Backend Integrations As a Full Stack Developer React and Full Stack Developer React Node.js, I integrate backend services supporting business workflows. REST API GraphQL Authentication & Authorization Payment Integrations Third-Party Services 📌 Product Growth As a Full Stack Developer React, I support products beyond launch through performance improvements, architecture enhancements, and ongoing development. 🔧 Technologies React • Next.js • TypeScript • JavaScript • Node.js • Redux • Tailwind CSS • REST API • Supabase • Firebase • PostgreSQL • Docker • Stripe • AWS Throughout my career, I've delivered 31 successful projects for startups and established businesses across 15+ countries. The products I've contributed to now serve more than 5 million users worldwide, helping companies launch faster and scale with confidence. As a React Full Stack Developer and Full Stack Developer React Node.js, I build applications using clean architecture, reusable code patterns, and development practices designed to support long-term business growth. 💼 Selected Experience 🏥 Healthcare Platform Worked on healthcare applications focused on improving operational workflows and user experience. As a Front end Developer React, I developed responsive interfaces, integrated APIs, optimized user journeys, and delivered features supporting medical staff and end users. 🚚 Cargo & Logistics Platform As a React Full Stack Developer and Full Stack Developer React Node.js, I built dashboards, shipment management interfaces, workflow solutions, and integrations supporting logistics operations. 👥 Recruitment & Hiring Platform I developed candidate management more than 150 dashboards, search and filtering systems, workflow features, and integrations supporting recruitment. 📌 Additional Expertise As a Front end Developer React, I collaborate with founders, product managers, and stakeholders to transform business requirements into intuitive user experiences and scalable technical solutions. I have experience working with existing codebases as well as building products from the ground up. My background as a Full Stack Developer React Node.js includes implementing secure authentication flows, integrating payment systems, optimizing application performance, and supporting products through multiple stages of growth. 📌 Industries Healthcare • Logistics • Recruitment • Booking Platforms • E-commerce As a Full Stack Developer React Node.js, I enjoy partnering with ambitious teams building products designed to scale. let's connect.

🚀 Do you need a scalable, automated, and high-performing web application? I specialize in building end-to-end solutions with Laravel, Vue.js, and AWS, tailored to make your business faster, smarter, and more efficient. ✅ Specialized in PHP (Laravel & Symfony) and modern frontend development with Vue.js ✅ Proven track record delivering complete, custom solutions from scratch ✅ Comfortable working across the full stack: backend, APIs, databases, frontend, DevOps ✅ Solid experience with cloud platforms like AWS, including EC2, RDS, S3, and Lambda ✅ Strong focus on clean code, scalability, and long-term maintainability 💡 What I Offer: Custom Web Applications with Laravel & Vue.js (clean code, fast, and secure) API Development & Integration (REST, GraphQL, third-party services, payment gateways) Automation Solutions to save time and reduce manual processes (cron jobs, cloud automation, scripts) AWS Cloud Deployment & Scaling (EC2, S3, RDS, Lambda, CI/CD pipelines) Database Design & Optimization (MySQL, PostgreSQL, MongoDB) ✅ Why Work With Me? Strong expertise in Laravel + Vue.js full stack development Proven track record in API-first applications Hands-on experience automating workflows & cloud infrastructures Reliable, detail-oriented, and focused on long-term client success 📩 Let’s connect to discuss how I can automate, optimize, and scale your project with modern full stack solutions.

I’m an AI-Powered Senior Full-Stack Developer with 10+ years of experience building scalable SaaS platforms, AI-powered applications, high-performance web systems, and cross-platform mobile products. I help startups and businesses build intelligent products by combining modern AI technologies with robust software architecture. From AI MVPs to production-ready SaaS platforms, I design and develop solutions that are scalable, secure, and built for real users. I specialize in integrating Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), AI agents, automation workflows, and AI model APIs into modern applications — helping businesses transform their ideas into smart, AI-driven products. I work with leading AI platforms and models to build practical solutions including AI assistants, chatbots, knowledge systems, document intelligence, AI search, and business automation tools. Whether you need an AI-powered SaaS product, LLM integration, RAG pipeline, custom chatbot, API development, or improvements to an existing application, I can help you design, build, and scale it. I have delivered products used by thousands of users and worked with startups and companies worldwide as a long-term technical partner, taking ownership of architecture, development, optimization, and delivery. I hold a Master’s in Computer Applications from Punjabi University (India) and am a Credly-certified professional, validating my technical expertise and industry standards. AI DEVELOPMENT EXPERTISE ✅ LLM application development ✅ RAG (Retrieval-Augmented Generation) systems ✅ AI chatbots & AI assistants ✅ AI agents and autonomous workflows ✅ AI model API integration ✅ OpenAI API integration ✅ Anthropic Claude API integration ✅ Google Gemini API integration ✅ Prompt engineering & optimization ✅ AI-powered SaaS platforms ✅ Document AI & knowledge management systems ✅ Vector search & semantic search ✅ Embeddings & similarity search ✅ Vector databases integration ✅ AI workflow automation ✅ Custom AI solutions for business processes AI TECHNOLOGIES - OpenAI GPT models & APIs - Claude API integrations - Google Gemini integrations - LLM-based application architecture - RAG pipelines - Embeddings & semantic search - Vector databases (Pinecone, FAISS, Chroma) - AI document processing - AI agents and tool calling - AI automation workflows WHAT I CAN HELP YOU BUILD ✅ AI SaaS applications ✅ AI-powered dashboards ✅ Internal knowledge assistants ✅ Customer support chatbots ✅ Document Q&A systems ✅ AI search platforms ✅ AI copilots ✅ Business automation tools ✅ AI integrations into existing applications ✅ MVP development ✅ Existing product modernization FULL-STACK DEVELOPMENT Frontend: - React.js, Next.js, Vue.js, Nuxt.js - TypeScript / JavaScript - React Native (iOS & Android) - Redux, RTK Query, TanStack Query - Tailwind CSS, Material UI, Ant Design - Storybook, Jest, Cypress Backend: - Node.js, Express.js, NestJS - Python (FastAPI, Django) - PHP (Laravel, WordPress) - REST APIs, GraphQL - Authentication, RBAC, background jobs - Scalable backend architecture - API design and integrations DATABASE & CLOUD - PostgreSQL, MySQL, MongoDB - Firebase / Firestore - Supabase - Pinecone & vector databases - AWS (EC2, S3) - Docker - Vercel, Netlify, Render, Railway, Heroku INTEGRATIONS - AI model APIs & third-party AI services - OpenAI, Claude, Gemini integrations - Stripe & payment gateways - Twilio & communication APIs - OAuth / social login - External SaaS APIs - Chrome & Firefox extensions TECH STACKS MERN Stack: MongoDB + Express.js + React.js + Node.js PERN Stack: PostgreSQL + Express.js + React.js + Node.js Laravel Stack: PHP + Laravel + MySQL/PostgreSQL I focus on building clean, scalable, production-ready applications with strong engineering practices, clear communication, and long-term maintainability. Let’s build your next AI-powered product.

I lead Chakor, a product development agency that helps founders turn ideas into scalable digital products. Since 2014, we’ve partnered with startups, scaleups, and enterprises to bring products to market faster while balancing speed, cost and quality. We go beyond development, helping founders validate ideas, design intuitive user experiences and architect scalable systems before building. This ensures products are not just functional but ready for long-term growth and market traction. We specialize in low-code, no-code and AI-assisted development leveraging tools like: Bubble – SaaS platforms, marketplaces, dashboards, AI apps, custom plugins FlutterFlow – Cross-platform mobile apps Webflow – High-performance websites and CMS-driven builds Chakor has delivered 150+ digital products across industries like fintech, healthcare, education, e-commerce, logistics and media. We're also one of the largest Bubble contributors with 370+ published plugins. We have access to premium support and early features, allowing us to solve complex challenges efficiently. We also build secure, compliant applications (GDPR, HIPAA, WCAG) with enterprise-level access and data protection. If you're looking to build an app, I would love to talk. The goal is simple: ensure you walk away from the first conversation not only with a plan to build your app, but with insights from someone deeply involved in the startup ecosystem and product development space. Keywords: Bubble Developer | Bubble Agency | Bubble Gold Agency | Bubble SaaS Development | Bubble Marketplace | No-Code SaaS | FlutterFlow Mobile App | Webflow Developer | MVP Development | AI App Development