Enterprise teams hire me when the React codebase needs to be architected right from the start or rescued from years of shortcuts. I have led frontend teams, built annotation systems for medical imaging from scratch, and delivered two Upwork contracts over $40K each with 5-star reviews. $80K+ earned on Upwork, 100% JSS, Top Rated Plus. What I've built: - Digital Pathology Slide Viewer: Technical Lead on a medical imaging platform for pathologists. Architected the entire annotation system from scratch using OpenSeadragon, including custom polygon clipping algorithms, real-time collaborative annotations via Websockets for concurrent users, and virtualized rendering handling hundreds of annotations simultaneously without performance degradation. Led a team of 2 frontend developers. 1.5 years, team of 5-8. Stack: React 19, TypeScript, NestJS, Redux Toolkit, PostgreSQL, Redis, Docker, GCP. - Media Intelligence Platform: built the entire frontend from scratch for a content aggregation and analytics system pulling from YouTube, Reddit, and web. Real-time dashboards with AG Grid Enterprise and AG Charts Enterprise, Cypress and Jest testing infrastructure, Webpack and Next.js optimization for reduced bundle sizes and faster builds. 1.5 years, team of 4-8. Stack: Next.js, React, TypeScript, NestJS, Websockets, Firebase, PostgreSQL, GCP, OpenAI API. - AI NLP SaaS Platform: led React 16 to React 18 migration for an enterprise NLP system deployed across AWS, GCP, and Azure. Built Survey Service as a standalone Next.js microservice from scratch. Backend contributions in FastAPI and Python. 1 year, team of 5-8. - Multi-Chain Crypto Wallet: Node.js microservices with Fastify and Express, AWS infrastructure via Terraform (EC2, RDS, Redis, S3, CloudWatch), Redis caching and DB indexing for response time optimization. 1 year, team of 10-12. How I work: Architecture documentation before code. Every feature has unit tests and E2E coverage before shipping. When I join a team I establish coding standards, patterns, and review processes, not just deliver features in isolation. Async updates every 2-3 days without being asked. I operate with the full backing of Meduzzen's senior engineering team. Every commit I ship is peer-reviewed by our internal technical leads before deployment. If I am unavailable, your sprints do not stop: a fully briefed Meduzzen engineer provides immediate coverage. One point of contact, zero single-point-of-failure risk. Core stack: React · Next.js · TypeScript · NestJS · Node.js · Redux Toolkit · PostgreSQL · Redis · Docker · AWS · GCP · Websockets · FastAPI · Python · Prisma · Terraform · GitHub Actions. If you need a senior React and Next.js engineer who can own the frontend architecture and contribute to backend systems, send me the brief. I reply within 4 hours.

💡 FREE AI / Backend / Automation Audit + Scalable Roadmap Before We Start Most AI and automation projects fail not because of bad ideas… But because the backend, agent architecture, or workflow system wasn't built to scale. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🚨 IF YOU ARE STRUGGLING WITH: ➤ AI agents that don't work reliably in production ➤ n8n workflows that break or can't scale ➤ GHL systems that are messy or not converting ➤ RAG pipelines with hallucinations or slow retrieval ➤ Backend APIs that fail under load ➤ AI ideas stuck in prototype phase 👉 YOU ARE IN THE RIGHT PLACE. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHAT I BUILD I build production-ready AI systems, agentic workflows, and scalable automation infrastructure. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤖 AI AGENT & LLM DEVELOPMENT ➤ Multi-agent systems (LangChain, LangGraph, CrewAI) ➤ RAG pipelines with vector databases (Pinecone, pgvector, Chroma) ➤ LLM integration (OpenAI, Claude, Gemini) ➤ Tool calling & function execution ➤ Prompt engineering for production reliability ➤ AI agents with memory and context management ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚙️ n8n & WORKFLOW AUTOMATION ➤ Complex n8n workflows with error handling & retry logic ➤ API integrations (REST, webhooks, OAuth) ➤ Self-hosted n8n deployment ➤ Webhook orchestration & event-driven automation ➤ Human-in-the-loop approval workflows ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📊 GHL (GoHighLevel) EXPERTISE ➤ GHL workflow automation (pipelines, triggers, actions) ➤ CRM automation & lead management ➤ GHL + API integrations (webhooks, custom APIs) ➤ AI voice agent integration (Retell, Vapi) with GHL ➤ SaaS mode setup & white-label systems ➤ Funnel & automation optimization ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🐍 BACKEND ENGINEERING ➤ Python (FastAPI) – high-performance APIs ➤ PostgreSQL with vector extensions (pgvector) ➤ Async systems & background workers ➤ Docker, cloud deployment (AWS/GCP) ➤ Secure authentication (JWT, OAuth) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📦 WHAT YOU GET When we work together, you receive: ➤ Production-ready AI agents and workflows ➤ Clean, documented, maintainable code ➤ Error handling, logging, and monitoring ➤ Loom walkthroughs + written documentation ➤ Systems built to scale from day one ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📈 EXPERIENCE & RESULTS ➤ 10+ years backend & SaaS development ➤ 70+ successful Upwork projects ➤ Top Rated Plus | $60K+ earned ➤ Built production AI agents, RAG systems, automation pipelines ➤ Long-term partnerships with startups & agencies ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ TECH STACK (by demand) High Demand (Lead with these): Python • LangChain/LangGraph • n8n • GoHighLevel • OpenAI/Claude API • RAG • Vector Databases (Pinecone/pgvector) • FastAPI • PostgreSQL Supporting: Laravel • Docker • AWS/GCP • Redis • React/Next.js ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 INDUSTRIES I WORK WITH ➤ AI-first SaaS startups ➤ Marketing agencies (GHL users) ➤ E-commerce & D2C brands ➤ Real estate & PropTech ➤ Healthcare & legal tech ➤ Fintech & payment systems ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 HOW WE START 1. You message me with your current challenge 2. I audit your system (AI / backend / GHL / n8n) – FREE 3. You get a clear, actionable roadmap 4. We build the right solution – the first time ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Most developers just build features. I build systems that work reliably in production. 👉 MESSAGE ME NOW FOR YOUR FREE AI / BACKEND / AUTOMATION ROADMAP ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔑 KEYWORDS (for Upwork algorithm): ai agent developer, n8n expert, python backend developer, gohighlevel expert, langchain, rag system, ai automation, workflow automation, ghl automation, agentic ai, llm integration, openai api, claude api, fastapi, vector database, multi-agent systems, production ai

✅ 𝟭𝟬𝟬+ 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱. 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝘀𝗰𝗮𝗹𝗲𝗱 𝘁𝗼 𝟭𝟬𝟬𝗸+ 𝘂𝘀𝗲𝗿𝘀 & $𝟭𝗠+ 𝗔𝗥𝗥. ✅ 𝟲+ 𝘆𝗲𝗮𝗿𝘀 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗦𝗮𝗮𝗦 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀. 𝗙𝗿𝗲𝗲𝗹𝗮𝗻𝗰𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗴𝗹𝗼𝗯𝗮𝗹 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝗶𝗻𝗰𝗲 𝟮𝟬𝟭𝟵. ✅ 𝗙𝗮𝘀𝘁 𝗠𝗩𝗣 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝗯𝗮𝘁𝘁𝗹𝗲-𝘁𝗲𝘀𝘁𝗲𝗱 𝗦𝗮𝗮𝗦 𝗳𝗼𝘂𝗻𝗱𝗮𝘁𝗶𝗼𝗻𝘀, 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗶𝗻𝗴 𝟯𝟬-𝟰𝟬% 𝗹𝗼𝘄𝗲𝗿 𝗰𝗼𝘀𝘁𝘀 𝗮𝗻𝗱 𝘁𝗶𝗺𝗲𝗹𝗶𝗻𝗲𝘀. ✅ 𝗖𝗼-𝗳𝗼𝘂𝗻𝗱𝗲𝗿 𝗼𝗳 𝗟𝗲𝗮𝗱𝘀𝗻𝗶𝘁𝗲. 𝗛𝗮𝗻𝗱𝘀-𝗼𝗻 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗮𝗻𝗱 𝗰𝗹𝗲𝗮𝗿, 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻. ✅ 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲, 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗰𝗼𝗱𝗲 𝗳𝗿𝗼𝗺 𝗱𝗮𝘆 𝗼𝗻𝗲. Hi, I'm Muhammad Hamza! I specialize in turning startup ideas into polished, revenue-ready SaaS and AI-powered products. 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲, 𝗮𝗻𝗱 𝗶𝗳 𝘁𝗵𝗲𝗿𝗲'𝘀 𝗮 𝗴𝗼𝗼𝗱 𝗳𝗶𝘁 𝘁𝗼 𝘄𝗼𝗿𝗸 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿, 𝗜'𝗹𝗹 𝗶𝗻𝘃𝗶𝘁𝗲 𝘆𝗼𝘂 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼𝗴𝗲𝘁𝗵𝗲𝗿. 🗣 𝗙𝗿𝗼𝗺 𝗼𝗻𝗲 𝗼𝗳 𝗼𝘂𝗿 𝗺𝗮𝗷𝗼𝗿 𝗰𝗹𝗶𝗲𝗻𝘁𝘀: ❝ Hamza is genuinely one of the strongest developers I've worked with. He takes rough, half-formed product ideas and shapes them into clear plans and working software faster than I thought was realistic. The communication is sharp, the code is clean, and he treats the product like it's his own. Working with him has been one of the best decisions we've made for our business. Anyone who gets the chance to hire him is in very good hands. ❞ I excel at turning broad startup ideas into scalable, user-friendly platforms. SaaS MVPs, AI dashboards, subscription products, internal tools. I also help you avoid the common pitfalls that kill products before they earn revenue. My approach is grounded in hard-won experience. 100+ shipped projects, years freelancing with global clients, and a stint as COO at Rigrex leading both operations and front-end development. Most of my clients are: ☑️ Funded Startups, focused on turning funding into MRR ☑️ Solopreneurs & Small Teams, wanting to build a SaaS MVP ☑️ Existing Businesses, adding AI or modernizing internal tools ☑️ Early-Stage SaaS, wanting to rebuild and scale up I'm co-founder of Leadsnite, where I built the SaaS web foundation from scratch. I'm personally involved in every project, with senior-level execution, clean handoffs, and direct communication throughout. My team and I consistently reduce dev costs by 30-40% by leveraging battle-tested SaaS foundations like auth, billing, dashboards, and role-based access, so your budget goes toward the truly custom functionality that differentiates your product. Every project we build delivers: 📱 Cross-Device Compatibility, Desktop, Mobile, Tablet 📈 Performance & Speed Optimization 🧩 Scalable, Cost-Effective Feature Addition 🛡️ Security & Role-Based Access 📊 Admin Dashboards & User Analytics 🤖 AI Integration with OpenAI, Claude, LangChain, Vector DBs 💳 Stripe & PayPal Subscription Billing 🌐 Clean, Maintainable Code Ready for Real Users 𝗧𝗲𝗰𝗵 𝗪𝗲 𝗨𝘀𝗲 𝗗𝗮𝗶𝗹𝘆: 🌟 Front-End: React, Next.js, Vue, Angular, TypeScript, Tailwind CSS, Bootstrap, HTML, CSS, JavaScript ⚙️ Back-End: Node.js, Express, Python, Next.js API routes, PHP / Laravel, REST API development 📁 Databases: PostgreSQL, MySQL, MongoDB, Redis, SQLite, MS SQL Server, Firebase Firestore, Supabase, DynamoDB, Prisma ORM ☁️ Cloud & DevOps: AWS, Azure, Google Cloud (Cloud Run, Firebase), Vercel, Netlify, DigitalOcean, Docker, CI/CD Pipelines, GitHub Actions, Nginx 🤖 AI & Automation: OpenAI, GPT-4, Claude, Gemini, LLaMA, LangChain, Vector Databases, Prompt Engineering, AI Chatbots, Document Processing, Content Generation Tools 💳 Payments & Integrations: Stripe, PayPal, Twilio, Slack, Webhooks, Third-Party APIs 📂 Tooling: Git, GitHub, Docker, CI/CD, AWS basics Thanks for taking the time to learn more about me. Invite me to your project or send me a direct message if you're interested in working together. Talk soon! Muhammad Hamza, Co-founder, Leadsnite Highlights of the work I have extensive experience in includes: SaaS MVP • AI Integration • OpenAI / GPT-4 • Claude • Gemini • LangChain • Vector Databases • Prompt Engineering • React • Next.js • Vue • Angular • TypeScript • Tailwind CSS • Node.js • Express • Python • PHP / Laravel • REST APIs • PostgreSQL • MySQL • MongoDB • Stripe • PayPal • Multi-Tenant SaaS • Subscription Billing • Admin Dashboards • Internal Tools • CRM Development • AI Chatbots • Document Processing • Content Generation Tools • Role-Based Access • Real-Time Data • Workflow Automation • Rapid MVP Delivery

My Name is Ghulam I specialize in fixing and refactoring messy or poorly designed PHP, Laravel, Codeigniter, Node & Typescript (i.e. Next.js, Nest.js etc) systems, especially APIs that are already running in production and cannot afford to break. I'm also capable to build frontend work using Vue, Next, or React. I can deploy PHP/ Laravel / Codeigniter / Node / Typescript project to self-hosted, AWS, DigitalOcean, Vercel, laravel forge, VPS, or even shared hosting. I love using TDD integrated with Continues Integration such: Travis, github actions or bitbucket pipelines. And comfortable using git versioning control systems such: GitHub, GitLab, or bitbucket. Many of my clients come to me after working with previous developers where the system becomes difficult to maintain, unstable, or risky to update. My role is to take over those situations and turn them into stable, scalable, and maintainable systems without disrupting existing functionality. With over 12 years of professional experience, I’ve handled real-world backend challenges such as POS systems, API integrations (including third-party platforms), order synchronization, and high-traffic applications. I don’t just write code, I make sure your system can safely evolve. # WHAT I CAN HELP YOU WITH: ✔ Fixing broken or unstable Laravel, Codeigniter, Next.js, Nest.js & Node applications ✔ Refactoring messy or unstructured codebases ✔ Improving API design and maintainability ✔ Ensuring backward compatibility (no breaking changes) ✔ Debugging complex issues in legacy systems ✔ Optimizing performance and database queries ✔ API integrations (payment gateways, POS, third-party platforms) ✔ System architecture improvements for scalability # HOW I WORK I usually start with a quick system audit to understand the root cause of the problem and identify risks before making changes. From there, I provide a clear and safe plan to fix or refactor your system — ensuring improvements are made without breaking what already works. I focus on: ✔ Clean and maintainable code ✔ Safe deployment ✔ Long-term scalability # WHY CLIENTS WORK WITH ME ✔ 1000 hours on Upwork & other experience as a senior architect in my office jobs ✔ Proven experience handling real production systems ✔ Strong focus on stability and backward compatibility ✔ Clear communication and structured approach ✔ Able to work with existing/legacy code (not just new builds) # SKILLS ✔ PHP 5, PHP 7.x, PHP 8.x ✔ Next.js, Nest.js # Framework ✔ Laravel 5.x - 12.x ✔ Yii 1 & Yii 2 ✔ Codeigniter ✔ Inertia (React, or Vue are welcome) ✔ Livewire ✔ Lumen ✔ Sanctum ✔ OAuth (Passport) ✔ Cashier ✔ Nova ✔ Filament # API Integration ✔ RESTfull API ✔ Stripe (Mollie) ✔ Ads APIs ✔ Campaign APIs ✔ Google Map API ✔ Webhook ✔ FacebookAPI # Database ✔ Mysql /MariaDB ✔ PostgreSQL ✔ Sqlite ✔ MongoDB ✔ Redis ✔ Casandra # Testing ✔ PEST ✔ PHPUnit ✔ Selenium # AI Tools to boost productivity ✔ Claude AI ✔ Cursor ✔ Copilot ✔ ChatGPT # Cloud Server ✔ AWS (EC2) ✔ Plesk ✔ DigitalOcean ✔ BlueHost ✔ Vercel ✔ Forge # Server ✔ Apache ✔ Nginx # JavaScript ✔ Vanilla JS ✔ jQuery ✔ Angular ✔ Vue: Vuex, Vuetify ✔ React: React-Redux, Redux-Thunk, Redux-Saga ✔ NextJS | NestJS | NuxtJs ✔ Webpack ✔ AlpineJS ✔ TypeScript # Other ✔ HTML5 ✔ CSS/ CSS3 ✔ LESS, SAAS, BEM ✔ Memcached ✔ Chrome Extension ✔ GIT or Subversion # API Docs ✔ Swagger (zircote) ✔ Blueprint API I will 💲REFUND 💲, if your expectation wont meet. For reference, you can see my work and overall experience below. Lets Chat! #Laravel #PHP #LaravelDeveloper #PHPDeveloper #FullStackDeveloper #BackendDeveloper #ReactJS #NextJS #NodeJS #ExpressJS #TypeScript #JavaScript #RESTAPI #APIIntegration #WebApplicationDevelopment #SaaSDevelopment #MultiTenantArchitecture #MultiTenantSaaS #PrismaORM #PostgreSQL #MySQL #DatabaseDesign #BackendArchitecture #ScalableApplications #EnterpriseApplications #AuthenticationSystems #SocketIO #RealTimeApplications #Docker #Coolify #AWS #AWSS3 #AWSSES #AWSSNS #TwilioAPI #BrevoAPI #TailwindCSS #MaterialUI #Git #MVCArchitecture #SoftwareArchitecture #PerformanceOptimization #ThirdPartyAPIIntegration #CustomWebApplications #StartupMVP #AdminDashboard #LaravelAPI #ReactDeveloper #NextJSDeveloper #NodeJSDeveloper #APIBackend #CloudInfrastructure #AI #ArtificialIntelligence #AIDrivenDevelopment #OpenAI #OpenAIAPI #GenerativeAI #LLMIntegration #AIIntegration #AIApplications #AIAutomation #GeminiAPI #AIChatbots #SmartAutomation #AIPoweredApplications #MachineLearningIntegration #ConversationalAI #AIProductDevelopment #EventManagementPlatform #MarketplaceDevelopment #CampaignManagement #AdvertisingPlatforms #AdTech #ScalableBackendSystems #TenantBasedApplications

With 8+ years of extensive experience in software development, I specialize in building high performance, scalable, and user centric WEB and DESKTOP APPLICATIONS using modern technologies. My core expertise lies in Microsoft based development (.NET, C#, ASP.NET Core/MVC, Blazor), combined with modern frontend frameworks like React, Angular, and mapping/GIS tools including ArcGIS. I also have strong proficiency in working with a variety of databases, including SQL Server, PostgreSQL, Supabase, MySQL, and MongoDB; ensuring robust data modeling, performance tuning, and secure data handling across applications. Whether you need an enterprise-grade backend, interactive frontend interfaces, geospatial data integration, or a reliable full-stack partner, I bring the right blend of technical skill, professionalism, and client focused service. - Why Clients Hire Me: A. Proven Track Record – Top Rated, $100K+ earnings, and 90%+ long-term client retention. B. Strict Deadline Adherence – I consistently deliver on time, without compromising quality. C. Scalable, Clean Code – Maintainable, modular codebase following best practices. D. Exceptional Communication – Transparent, responsive, and proactive collaboration. - Technical Expertise: a. Backend: C#, ASP.NET Core/MVC, Web API, Node.js, Express.js, Blazor, OWIN, IIS b. Frontend: React, Angular, Razor, Next.js, Vue.js, Typescript, Bootstrap, Tailwind CSS, Kendo UI, jQuery c. GIS/Mapping: ArcGIS JavaScript API, ArcGIS REST services integration d. Databases: SQL Server, PostgreSQL, MySQL, Supabase, MongoDB e. Cloud/DevOps: Azure DevOps, AWS (S3, EC2, Lambda), GitHub Actions, Docker f. APIs & Integrations: REST, GraphQL, SOAP/WSDL, SSO/Auth systems Primary Skills (Core Stack): - Full Stack Developer - .NET Developer - ASP.NET Core Developer - C# Backend Developer - React.js Developer - Angular Developer - Blazor Developer - MAUI App Developer - .NET MAUI Developer - Web API Developer - Entity Framework Core - Razor Pages - SignalR Developer Frontend Technologies: - JavaScript Developer - TypeScript Developer - HTML5 / CSS3 / SCSS - Responsive Web Design - Tailwind CSS - Bootstrap - React Hooks - Angular Material - RxJS - Material UI (MUI) Backend / Server-Side - ASP.NET Core Web API - RESTful API Development - Microservices Architecture - Clean Architecture - Dependency Injection - Middleware in .NET - LINQ / EF Core - SQL Server / PostgreSQL / MySQL - IdentityServer / JWT Authentication Version Control & Tools: - Git / GitHub / GitLab / Bitbucket - Azure DevOps Pipelines - Jira / Trello / ClickUp - Visual Studio 2022 - Postman / Swagger - Figma to React/Angular Testing & Quality: - Unit Testing in .NET (xUnit, MSTest) - Jest for React - Cypress / Selenium - Playwright - Code Review & Refactoring Cloud & DevOps: - Azure Developer - AWS Developer - Azure App Services - Azure Functions - AWS Lambda - CI/CD (GitHub Actions, Azure DevOps) - Docker - Kubernetes - Cloudflare I work with different technologies and like complex and long-term projects, my experience allows me to solve complex problems related to the design of the project during the negotiation phase. I prefer long-term cooperation with the client and therefore try to provide maximum comfort and quality.

⭐ Senior Full Stack Developer with 5+ years of experience building scalable web applications, SaaS platforms, and high-performance APIs using Laravel, Node.js, Vue (Nuxt), and React (Next.js). I specialize in developing modern, scalable systems that combine powerful back-end architecture with clean, responsive UI/UX. My focus is writing clean code, building reliable APIs, and delivering products that are fast, secure, and easy to maintain. ⭐ Top Rated Plus on Upwork (Top 1%) 🔹 Core Expertise 🔹 🎯Front-End Development ✔ Vue.js (Vue 3, Nuxt.js) ✔ React (Next.js, Redux, Hooks) ✔ TypeScript ✔ Responsive UI development ✔ Tailwind CSS, Bootstrap, Vuetify 🎯Back-End Development ✔ Laravel (APIs, Eloquent, Queues, Jobs) ✔ Node.js (Express.js, REST APIs, GraphQL) ✔ PHP (OOP, MVC architecture) 🎯Database & Performance ✔ MySQL (database design & query optimization) ✔ MongoDB (NoSQL data architecture) ✔ API performance optimization 🎯API & Third-Party Integrations ✔ Payment gateways (Stripe, PayPal) ✔ Real estate & travel APIs ✔ OAuth / JWT authentication ✔ CPanel / WHM integrations 🎯Tools & Workflow ✔ GitHub / GitLab / Bitbucket ✔ Agile development ✔ Clean architecture & documentation 🔹 Industry Experience 🔹 🎯I have worked on projects including: ✔ SaaS Platforms – scalable dashboards & subscription systems ✔ E-commerce platforms – secure payments & product management ✔ Real Estate applications – property APIs & custom dashboards ✔ HRM / CRM systems – multi-role management & reporting ✔ Travel & booking systems – API integrations ✔ Finance & crypto apps – real-time data tracking 💡 Why Clients Work With Me I focus not just on writing code, but on building products that are reliable, scalable, and easy to maintain. My goal is to deliver solutions that help businesses grow while keeping development efficient and transparent. 📩 Let’s Work Together If you're looking for a reliable Full Stack Developer (Laravel, Node.js, Vue/Nuxt, React/Next) to build or scale your application, feel free to send an invitation. Warm Regards, Sahil Dudhat

If your startup needs an AI agent, voice bot, or full-stack product built - I've done it 101 times with a 100% Job Success Score. I'm Kaushik, a Full-Stack & AI Developer specializing in LangChain, RAG systems, voice agents (ElevenLabs + Twilio), Next.js, and React SaaS platforms. Top Rated Plus. $80K+ earned. I don't hand off. I own the build end-to-end. Most developers write code. I build systems that think. - What makes me different in 2026 - The market has shifted. Clients don't just need a website or a web app anymore. They need AI agents. They need automation. They need systems that work while they sleep. That's exactly what I build. I combine 7+ years of full-stack development with 3+ years of hands-on AI integration - giving you a developer who can build the frontend, the backend, the API layer, AND the intelligence on top of it. One hire. End-to-end ownership. — What I build for you — ✦ AI Agents & Chatbots: LangChain, RAG, LLM-powered, context-aware ✦ Voice Agents: ElevenLabs, Twilio, Whisper, OpenAI real-time voice ✦ AI Automation: n8n, Zapier, Make pipelines that save 100s of hours ✦ LLM Integrations: OpenAI API, Claude, Gemini, LlamaIndex ✦ Full-Stack SaaS: Next.js + Node.js, React + Laravel, built to scale ✦ MVP Development: idea to live product, fast ✦ REST & GraphQL APIs: clean, documented, production-ready ✦ Python Backends: FastAPI, automation scripts, AI pipelines ✦ Marketplace, CRM & Admin Dashboards ✦ Stripe, OAuth & third-party integrations - Tech Stack : Full-Stack: Next.js, React, Node.js, Laravel, Vue.js, TypeScript, Tailwind CSS Python & AI: Python, FastAPI, OpenAI API, LangChain, LlamaIndex, RAG Voice & Agents: ElevenLabs, Twilio, Whisper, Vapi, custom AI agents Automation: n8n, Zapier, Make (Integromat), webhook systems Database: MySQL, PostgreSQL, MongoDB, Supabase DevOps: Git, CI/CD, Docker, Linux, Vercel, VPS - Why 100+ clients chose me - and kept coming back - ✓ Top Rated Plus - top 3% of all Upwork freelancers ✓ 100% Job Success Score across 101 projects ✓ 4,700+ hours of verified work delivered ✓ Daily communication - no ghosting, no surprises ✓ I don't just deliver features. I deliver outcomes. I've built for startups, SaaS companies, and growing businesses across the US, UK, and Europe. From a simple automation workflow to a full AI-powered product - I take complete ownership from day one. - How I work - Every project starts with a clear scope, realistic timeline, and defined milestones. I communicate daily. I flag issues early. And I don't consider the project done until you are genuinely satisfied. Ready to build something intelligent? Send me a message right now. Tell me what you're building - I'll respond within a few hours with a clear plan, honest timeline, and zero fluff. Let's build your next product. The smart way.

I help SaaS, Web, and Product teams deliver stable, scalable, production-ready releases by owning Quality across the entire application stack. As a senior QA specialist, I work across manual testing, automation, API validation, and performance checks selecting the right approach based on product stage, release risk, and business impact. My focus is not just finding bugs, but preventing costly production issues. My full-stack QA approach includes: • Functional & exploratory testing of real user flows • Automated regression to protect frequent releases • API testing to validate integrations and data accuracy • Performance & load testing to ensure scale readiness • Release testing and pre-production sign-off I collaborate closely with founders, product managers, and developers to ensure issues are clearly reported, properly prioritized, and easy to fix. Clients value my ability to think like an end user while testing with a system-level mindset. When automation makes sense, I design and maintain reliable test suites to speed up regression cycles and support CI/CD pipelines always balancing automation effort with real ROI. Tools & environments: Selenium, Cypress, Playwright, Appium, Postman, JMeter, Jira, Git, CI/CD pipelines, staging & production systems. If you’re looking for a QA specialist who can own quality end-to-end and give you confidence before every release, feel free to message me. I’m happy to review your product and suggest the best next steps.

Your Shopify store should drive revenue not just look good. I'm a Shopify Expert with 9+ years building high-performance stores, custom Shopify apps, and Shopify Plus systems that have generated $4.2M in sales within 4 months for a single client. What sets me apart is the combination of deep Shopify app development expertise and front-end craft. Most developers do one or the other I build the custom app logic AND the pixel-perfect storefront, so nothing gets lost in handoffs. I've delivered for brands including UNICEF and PepsiCo, and I bring that same standard to every project. Here's what I can build or improve for you: ✅ Shopify Store Development — custom themes, Shopify Plus builds, Figma-to-Liquid conversion, landing pages, and full eCommerce builds ✅ Shopify App Development — private apps, embedded apps, Shopify API integrations, and webhook-based automation ✅ API & Third-Party Integrations — Admin API, Storefront API, GraphQL, payment gateways, CRM connections, and custom backend logic ✅ Conversion & Speed Optimization — CRO improvements, mobile performance, SEO-friendly structure, and checkout flow enhancements ✅ Front-End Development — React.js, Next.js, TypeScript, Liquid, Tailwind CSS, Three.js, and GSAP animations 🏆 Top Rated on Upwork | 5-Star Rating across all completed contracts 📜 Shopify Certified Developer (Shopify Partner Program) 📜 Shopify Development Fundamentals (Shopify) 📜 Shopify Theme Development Certification • 100+ Shopify and Shopify Plus stores built and optimized • Delivered projects for UNICEF and PepsiCo • One client store generated $4.2M in sales within 4 months of launch • 9+ years of production Shopify experience not tutorial hours Send me a message describing your project and I'll respond within a few hours with a clear plan. Whether you need a new store, a custom app, or a performance fix let's build something that works.

One of my clients grew revenue 500% after I rebuilt their core algorithm. Another called a $500K research platform I led the "gold standard" in their industry. That's the bar I work to on every project. I build AI-powered web and mobile apps from idea to production. For startups and scale-ups in healthcare, fintech, SaaS, and eCommerce. What makes me different from most full stack developers: I own the entire AI layer too. Not just connecting an API and calling it done, but designing RAG pipelines, LLM chatbots, OpenAI-backed features, and AI automation workflows that solve real business problems all inside production-grade React Native, React, and FastAPI apps. What I build for clients: → AI chatbots and assistants (OpenAI, LangChain, RAG, Pinecone) → AI-powered mobile apps (React Native, Flutter, iOS, Android) → SaaS platforms, MVPs, and full stack web apps → RAG systems: chat with documents, internal knowledge bases → REST APIs, microservices, and scalable backend architecture → Payment integrations (Stripe, Twilio) and cloud deployment (AWS, Docker) Industries I know deeply: healthcare, fintech, eCommerce, SaaS, edtech, logistics. 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞. 𝟗,𝟕𝟎𝟎+ 𝐡𝐨𝐮𝐫𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤. 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞. 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬. If you're building something that needs AI to actually work in production, not just a demo. 𝐥𝐞𝐭'𝐬 𝐭𝐚𝐥𝐤.