I build scalable full-stack MVPs and SaaS products using modern JavaScript stacks. My focus is on turning ideas into working products fast, clean, and production-ready. I work with React, Node.js, MongoDB, PostgreSQL, and modern frameworks to ship reliable web applications that can grow with your business. My work includes SaaS platforms, MVPs, dashboards, internal tools, and custom web apps, from early prototypes to fully deployed products. I specialize in: Full-stack MVP and SaaS development using React, Node.js, and modern backends API development and third-party integrations including payments, CRMs, auth, and analytics Scalable backend architecture with clean database design and role-based access Responsive, performance-optimized frontends focused on usability and clarity Custom admin panels, dashboards, and CMS-style systems Authentication, subscriptions, billing, and user management flows Clean, maintainable codebases built for iteration and long-term growth Deployment, hosting, and production optimization I handle end-to-end product development, from translating requirements into architecture, building the frontend and backend, integrating APIs, and deploying the application. Whether you’re validating an idea, launching a startup MVP, or extending an existing SaaS product, I focus on building only what matters so you can move fast without technical debt. I’ve worked on products where clarity, speed, and stability matter more than buzzwords. I communicate clearly, document where needed, and keep things structured so you always know what’s being built and why. If something can be done simpler or more efficiently, I’ll tell you upfront. I’m happy to provide honest guidance and technical direction before we start. I charge only for the actual development work, not for advice or planning discussions. If you need a full-stack developer who can build real MVPs and SaaS products that are clean, scalable, and ready for users, I’m ready to help.

I lead a white-label software development team that helps agencies, startups, and enterprises deliver scalable digital products without expanding their internal engineering teams. With 10+ years of experience and a team of 16 engineers, we specialize in building enterprise-grade applications, SaaS platforms, modern CMS solutions, and AI-powered systems that are reliable, secure, and built for long-term growth. We work as a seamless backend technology partner—either directly with clients or behind the scenes under your brand. What We Do Best:- 🔹 White Label Development & Team Extension * Dedicated developers or full teams * NDA-based delivery for agencies * Seamless collaboration with your internal team * Long-term development & support 🔹 Enterprise CMS & Headless Platforms * Sitecore XP / XM / XM Cloud * Sanity CMS With React.JS & Nextjs / Chatbot * Optimizely CMS With React.JS & Nextjs * Any Headless CMS (Next.js / React / JSS) * Multisite & multilingual implementations * Migration, upgrade & performance optimization 🔹 SaaS & Custom Software Development * ASP.NET Core / MVC / Web API * React.js / Next.js / Angular * PHP / Laravel/ AI / Laravel CMS * Python FastAPI * CRM / ERP / Business automation systems * API-driven scalable applications 🔹 AI Integration & Automation * OpenAI / Claude / LLM integrations * AI chatbots & assistants * Workflow automation systems * AI-powered internal tools & dashboards 🔹 Mobile & Hybrid Applications * React Native mobile apps (Android / iOS) * Hybrid apps (Capacitor / Ionic) * Progressive Web Apps (PWA) 🔷 How We Work * Clear project planning & architecture * Agile development with regular updates * Clean, maintainable, scalable code * Transparent communication * Long-term support & optimization 🔷 Engagement Models * White-label development partnership * Dedicated developers / team extension * Fixed-price project delivery * MVP development for startups * Ongoing support & maintenance 🔷 Why Clients Choose Us * 10+ years of real-world engineering experience * Strong backend + frontend + AI expertise * Ability to scale quickly with a 16-engineer team * Reliable delivery for agencies and enterprises * Business-focused approach (not just coding) 🔷 Ideal Projects * SaaS product development & MVPs * Sitecore / headless CMS implementation * AI feature integration into existing apps * CRM / ERP / internal business platforms * Long-term development partnerships If you're looking for a reliable white-label development partner or a team that can take ownership of your product development, let’s discuss your requirements. You can directly ping / DM here in upwork. Thanks!

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.

I'm Mustafa — a Laravel and WordPress developer with 13+ years of experience building web applications that actually hold up under real-world pressure. I work with businesses that need a reliable technical partner for the long term — someone who understands their system deeply, not just completes tickets. What I build: Laravel & Custom Web Applications: Secure, well-architected backends built to scale. I've delivered 100+ projects, including SaaS platforms, multi-vendor marketplaces, and complex business tools. Getting the architecture right from day one prevents expensive rebuilds later. WordPress & WooCommerce: Custom theme development, plugin development, WooCommerce stores with complex requirements — subscriptions, multi-currency, custom checkout flows. Not template work — proper engineering. AI Integration into Existing Systems: I integrate OpenAI, Claude, and other AI APIs directly into production applications — AI-powered dashboards, automated workflows, and intelligent data pipelines. This is where I'm seeing the most demand right now, and where I add real value beyond standard development. API Development & Integrations: Complex API orchestration, third-party service connections, automation workflows — bringing multiple systems into one reliable platform. How I work: I'm available for long-term engagements (20–40 hrs/week) and well-scoped fixed-price projects. Clear communication, realistic timelines, and clean code that your future developers will appreciate. Let's talk about what you're building. — Mustafa

Senior Python backend developer with 10+ years building scalable SaaS platforms, REST APIs, and AI-powered systems in Python, Django, DRF, and FastAPI. I turn product requirements into clean architecture, reliable integrations, and production-ready delivery. Need someone to own the backend — from database and API design to LLM integrations and deployment? That's my core strength. I focus on backend-heavy web applications where reliability, maintainability, and business logic matter most, and I help teams fix slow, messy, or hard-to-maintain Python/Django codebases by restructuring logic, stabilizing APIs, and cutting technical debt. I also deliver end-to-end SaaS MVPs — integrations, admin flows, auth, deployment, and collaboration across the full web stack. 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱: 🟢 SaaS backends and MVPs (Django / DRF, FastAPI) 🟢 REST APIs, webhooks, and third-party integrations 🟢 AI & LLM features — OpenAI, Claude, LangChain, LangGraph, RAG 🟢 Workflow automation and ETL pipelines (Celery, Redis) 🟢 Admin panels, authentication, roles & permissions 🟢 Refactoring & scaling legacy Python / Django systems 🟢 Docker-based deployment, AWS, and CI/CD 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗵𝗶𝗿𝗲 𝗺𝗲 𝘁𝗼: 🟢 Launch the backend for a new SaaS product 🟢 Stabilize and scale an existing Django application 🟢 Build APIs and integrations that scale reliably 🟢 Automate manual business workflows 🟢 Add AI / LLM functionality to an existing platform 🟢 Get senior-level execution without unnecessary complexity 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Over 10+ years I've shipped products across SaaS, fintech, healthcare, education, and internal business tools. I build modular, well-structured systems that stay easy to extend as your product grows — especially strong in API-heavy platforms, async workflows, and third-party integrations. 𝗖𝗼𝗿𝗲 𝘀𝘁𝗮𝗰𝗸: Python · Django · Django REST Framework (DRF) · FastAPI · PostgreSQL · MySQL · Celery · Redis · Docker · AWS · GitLab CI/CD · REST APIs · Webhooks · Stripe · Twilio · OpenAI · Claude · LangChain · LangGraph · React 𝗛𝗼𝘄 𝘄𝗲 𝘀𝘁𝗮𝗿𝘁: For projects where the scope needs validation, I offer a paid discovery phase — a practical way to align on architecture, priorities, and a delivery plan before a larger engagement. You leave with a clear roadmap, fixed next steps, and no guesswork. If you need a solid Python/Django backend, clean APIs, AI integrations, and senior-level execution with clear communication, send me a message — I'll reply with honest feedback on your project.

Hello, 🎯 I have 5+ years of full-stack engineering experience, I help global startups, SaaS companies, healthcare providers, and enterprise teams build stable, scalable, and growth-focused digital products. My core strength lies in converting complex requirements into clean, maintainable, and production-ready solutions using MERN Stack, Next.js, Node.js, Electron.js, Python (Django/Flask), n8n Automation, OpenAI, AI-ML, and DevOps workflows. I have contributed as a Software Engineer Level 2 at Microverse (USA) and worked remotely with multiple international teams, building cross-functional systems and delivering quality results consistently. Alongside development, I bring solid knowledge of QA, automation testing, CI/CD, API architecture, system optimisation, and product-scaling practices. 🏆 Key Achievements ================================================================ ✅ Built and contributed to Bruno, a notable software product used globally. ✅ Successfully led a remote engineering team for a USA-based Healthcare project. ✅ Delivered multiple long-term projects for SaaS companies with zero production rollback. ✅ Developed AI-powered automation systems using n8n + OpenAI. ✅ Designed secure and performance-driven architectures for enterprise clients. ✅ Built advanced desktop applications using Electron.js. ✅ Created scalable backend ecosystems using Node.js, Python, and modern cloud tools. 🛠 Hands-on Technology Expertise ================================================================ 👉 MERN Stack, Next.js, Node.js, Electron.js 👉 Python, Django, Flask 👉 n8n Automation, OpenAI, AI/ML 👉 DevOps, CI/CD, Docker, Cloud Deployments 👉 QA Testing, API Testing, Automation Testing 💼 My Commitment to Every Project ================================================================ 🌟 Clear communication 🌟 On-time delivery 🌟 Clean and maintainable code 🌟 Transparent development process 🌟 Full responsibility for assigned tasks 🌟 Strong problem-solving approach 🌟 Long-term support 📌 My Capabilities ================================================================ 🙂 End-to-end product development 🙂 System and API design 🙂 Automation and AI integration 🙂 Performance optimisation 🙂 Team leadership 🚀 My Tech-Excellence & Adoption Mindset ================================================================ 🏆 I constantly explore emerging tools to deliver smarter and faster solutions. 🏆 I adapt new technologies early to keep projects future-ready. 🏆 I believe in continuous improvement to deliver meaningful digital impact. 🤝 Let’s Build Something Valuable ================================================================ If you are looking for a dependable engineer who understands business goals and delivers work with honesty, clarity, and dedication - I would be glad to connect. "INVITE ME" anytime, and let’s discuss how I can help bring your product to life. Thanks for reading my profile. 🙂 Kind Regards, Devendra. 🙂

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.

👨‍💻 Full-Stack Developer | React • Angular • .NET | Product-Focused Builder Many developers focus only on writing code. I focus on building reliable, production-ready products. I design and develop secure, scalable web applications that align with real business needs, not quick prototypes that fail under real usage. My approach combines solid architecture, clean implementation, and practical decision-making. With 5+ years of full-stack experience, I’ve delivered projects end-to-end, from planning and system design to frontend, backend, and deployment. ⸻ 🎯 What You Can Expect ✅ Production-ready and scalable solutions ✅ Practical, business-driven feature decisions ✅ Clean, testable, maintainable code ✅ Clear milestones and regular progress updates ✅ Strong debugging and performance tuning ✅ Reliable communication and ownership ⸻ 🚀 What I Build Web Applications & Platforms • MVPs and complete products • Dashboards, admin panels, CRMs, internal tools • API-driven applications • Multi-role and multi-tenant systems Frontend • React, Next.js, Angular • TypeScript and JavaScript • Responsive, cross-browser interfaces • Structured component architecture Backend • ASP.NET Core / .NET APIs • Node.js / Express • REST API development and integrations Databases • SQL Server, MongoDB, PostgreSQL, MySQL Tools & Workflow • Git, CI/CD, Docker • Agile and milestone-based delivery ⸻ 💼 How I Work ✅ Start with clear requirements and goals ✅ Define a practical technical approach ✅ Deliver in small, reviewable milestones ✅ Keep the codebase clean and documented ✅ Communicate consistently throughout the project ⸻ 🤝 If you’re looking for a dependable developer who treats your product seriously and works like a long-term partner, I’d be glad to discuss your project.

😪Tired of Developers Who Take Your Money and Fail to Deliver? Let Me Be the Last Developer You’ll Ever Need. I’ve helped 20+ frustrated clients recover from wasted investments. I am a Senior Full Stack Engineer, SaaS Developer, and AI Engineer with 5+ years of experience delivering scalable, secure, and high-performance software solutions. I specialize in Full Stack Development, SaaS Development, AI Development, Web Application Development, Software Architecture, Frontend Development, and Backend Development, building modern applications using React.js, Next.js, Node.js, TypeScript, JavaScript, Python, FastAPI, and Django. My expertise includes designing and developing complete products, from intuitive user interfaces and scalable backend systems to cloud-native architectures that support long-term business growth 💼 Services I Offer: ✅ SaaS Platforms & Multi-Tenant Applications ✅ AI-Powered Applications & AI Integrations ✅ Custom Web Applications ✅ React.js & Next.js Frontend Development ✅ Node.js, Express.js & Backend Development ✅ REST APIs & Third-Party Integrations ✅ Admin Dashboards & Internal Business Tools ✅ Subscription-Based Platforms ✅ Payment Gateway Integrations (Stripe, PayPal) ✅ Authentication & Role-Based Access Systems ✅ Database Architecture & Optimization ✅ Cloud Deployment & AWS Infrastructure ➡️Message me the current state of your project (screenshots, repo link, whatever you have). I’ll tell you exactly what it’ll take to fix it and when it’ll be done — in the first 10 minutes. ➡️You’re not hiring another freelancer. ➡️You’re hiring the guy who ends the nightmare and finally gets you the result you deserve. ➡️Send me a message right now. I’m online and ready to take over. Stack: Supabase (Postgres, RLS, Auth, Edge Functions, Vector/RAG), Stripe (Connect, Subscriptions, webhooks), React, Next.js, React Native, TypeScript, Node.js, voice agents (ElevenLabs, Retell), Twilio, OpenAI and Claude APIs, n8n, Vercel. 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: AI Developer, AI Engineer, AI Applications, AI Agent, AI Agent Developer, AI Automation, AI Automation Developer, AI Workflows, AI Orchestration, AI Project Manager, AI Project Optimization, AI SMS SaaS, AI Chat Integration, AI Assistant, Claude AI, Claude Code, Codex, Vibe Coding, Vibe Coded App, Base44, Base44 Expert, Base44 Migration, Base44 Development, Base44 Debugging, Base44 Bug Fix, Lovable, Lovable.dev, Lovable Expert, Lovable Development, Lovable App, Lovable Website, Lovable Landing Page, Lovable Migration, Lovable Optimization, Replit, Replit Development, Replit Debugging, Replit App, Replit Hosting, Full Stack Developer, Software Developer, Web Developer, Backend Developer, Frontend Developer, Web Application Development, Full Stack Web Application, SaaS Developer, MVP Developer, Startup MVP, Custom Web Application, Dashboard Development, Admin Dashboard, User Dashboard, Portal Development, Next.js, React, React.js, Node.js, JavaScript, TypeScript, Vanilla HTML, UI/UX, Responsive Design, Supabase, Supabase Expert, Supabase Backend, Supabase Integration, Supabase Migration, Supabase Auth, Supabase Database, PostgreSQL, API Development, API Integration, Backend Infrastructure, Cron Jobs, State Management, Authentication, SaaS, SaaS Platform, SaaS Development, SaaS MVP, MVP Development, Marketplace Development, CRM, ERP, Budget Management Tool, Investment Platform, Rental Platform, Booking System, Patient Portal, Education Platform, Fitness App, Sports Platform, Stripe Integration, Clerk Authentication, Checkout Integration, WordPress Integration, ACF, WooCommerce, Hostaway, Data Scraping, CMS Development, Custom CMS, Cloud Migration, Vercel, Hostinger, Website Deployment, App Deployment, Production Deployment, Go Live, Infrastructure Engineering, Bug Fix, Debugging, Troubleshooting, Code Audit, Performance Optimization, Code Refactoring, Technical Support, Maintenance, Migration

I’m a full-stack WordPress developer and WordPress designer with 14+ years of experience in WordPress development, WordPress website design, WordPress customization, WordPress bug fixes, WordPress speed optimization, WordPress migration, WooCommerce development, Elementor development, WordPress landing pages, and custom WordPress development. I help businesses build, redesign, fix and improve WordPress websites that need better performance, stronger design, faster load times, cleaner UX, improved conversions, and reliable long-term support. That includes WordPress redesigns, Elementor websites, WooCommerce stores, landing pages, migrations, bug fixes and ongoing WordPress development. I work across both the design and development side of WordPress — from new builds and redesigns through to bug fixing, WooCommerce improvements, Elementor work, speed optimization, migrations and ongoing support. 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐈 𝐝𝐞𝐥𝐢𝐯𝐞𝐫: • WordPress website design • WordPress development • WordPress website redesign • WordPress customization • WordPress bug fixes and troubleshooting • WordPress speed optimization and Core Web Vitals improvements • WordPress migration and website transfers • WordPress maintenance and ongoing support • WordPress security hardening • WordPress landing page design • WordPress e-Commerce and WooCommerce development • Elementor and Elementor Pro design/development • Figma to WordPress • PSD to WordPress • WordPress theme customization • WordPress plugin customization • Custom WordPress development • WooCommerce customization and store improvements • WordPress consultation and technical problem solving 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐈 𝐰𝐨𝐫𝐤 𝐨𝐧 • New WordPress website design and development • Full WordPress website redesigns • Elementor websites and Elementor landing pages • WooCommerce website builds, redesigns and improvements • WordPress landing pages designed to increase enquiries or sales • WordPress bug fixing, troubleshooting and cleanup work • Fixing slow WordPress websites and improving Core Web Vitals • WordPress migration projects including platform transfers and hosting moves • Custom WordPress development beyond standard theme or plugin setup • Ongoing WordPress maintenance, updates and support 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 My work is focused entirely on WordPress, including: • WordPress development • WordPress website design • WordPress customization • WordPress bug fixes • WordPress speed optimization • WordPress migration • WordPress maintenance • WordPress security • WordPress landing pages • WooCommerce development • Elementor development • Custom WordPress development I work across both the front-end and back-end of WordPress, so I can usually take a project from design or redesign through to development, launch, optimization and ongoing support. 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐒𝐤𝐢𝐥𝐥𝐬 • PHP, JavaScript, HTML and CSS • Custom WordPress development • WordPress theme customization • WordPress plugin customization • WooCommerce development and WooCommerce customization • Elementor and Elementor Pro • Gutenberg and major WordPress page builders • API integrations and custom functionality • WordPress troubleshooting and technical fixes • WordPress performance optimization • WordPress security improvements If you need help with WordPress development, WordPress website design, WordPress landing pages, Elementor, WooCommerce, WordPress bug fixes, WordPress speed optimization, WordPress migration, WordPress maintenance or a full WordPress website redesign, send me a message and I’ll take a look at the project.