Hire the Best Fastify Developers

I build full-stack applications and automation systems that save businesses real time and real money. If your backend is becoming a mess, your team is still doing work that should be automated, or your product feels slow, the system wasn't built to scale. That's exactly what I fix. With 3+ years of hands-on experience, I don't just ship code. I build systems that are clean, reliable, and grow with your business. What I deliver: Full-Stack Development: Fast, modern applications built with Next.js, React, Node.js, and TypeScript. From UI to backend, structured and production-ready from day one. Backend & APIs: Scalable APIs with solid architecture, proper authentication, and optimized database handling using MongoDB and PostgreSQL. No shortcuts, no technical debt. Automation & CRM Workflows: Repetitive work eliminated. Lead handling, data flow, and system integrations automated so your team stops doing things manually and starts focusing on what actually matters. AI Integration: Real AI features built into your product or workflows. Not just basic prompts — practical functionality your team will actually use. Performance & Scalability: Speed improvements and infrastructure that handles growth. Caching, clean queries, and efficient design that holds up when things get busy. 🤝 How we work: Quick Discovery Call: We talk through what you're trying to build or fix. No fluff, just clarity (15–30 min). Clear Plan, No Surprises: I map out exactly what we'll build, how long it'll take, and what to expect. You'll know the full picture before we start. Fast Execution: I build, test, and deliver with regular check-ins. Most projects ship within days, not weeks. Handoff & Support: You get something you can actually maintain and rely on. And I'm available after delivery if you need improvements or scaling support. I'm comfortable jumping into unfamiliar codebases and figuring things out fast. Show me your stack and your problem, I'll have a solution mapped out before most developers finish reading the brief. Free consultation included. Send a message and let's figure out where your biggest bottleneck is.

Need a full-stack developer who can understand your business, solve complex challenges, and build future-ready digital products that support long-term growth? Whether you're struggling with an underperforming website, inefficient workflows, an application no longer scales, or your existing system has become difficult to maintain, I help businesses build and improve everything from high-performing websites to complex business systems, delivering scalable, secure, SEO-friendly, and AI-powered digital solutions. Over the past 5+ years, I have successfully delivered 75+ custom web applications using MERN Stack, including custom websites, web applications, MVPs, large marketplace platforms, real estate solutions, SaaS applications, CRM and ERP systems, workflow automation solutions, AI-powered applications, and enterprise software solutions. 💡 What Makes Me Different? Most developers focus on writing code. I focus on solving business problems. Before writing a single line of code, I take time to understand your business model, workflows, challenges, users, and growth objectives. This allows me to build solutions that are scalable, efficient, maintainable, and aligned with your long-term goals. As a Full Stack Developer, I combine modern web development, SEO Optimization, AI integration, and Business Strategy to help companies increase efficiency, automate workflows, reduce operational costs, and accelerate sustainable growth. 🛠️ What I Build: ✅ React.js & Next.js Websites, Custom Web Applications & Redesigns ✅ SaaS Platforms, MVPs & AI-Powered Applications ✅ E-Commerce Websites & Multi-Vendor Marketplace Solutions ✅ CRM, ERP & Internal Business Management Systems ✅ Client Portals, Dashboards & Booking Systems ✅ Logistics & Delivery Platforms ✅ Workflow Automation Systems ✅ API, Payment Gateway & Third-Party Integrations 🤖 AI & Automation Solutions: ✅ AI Chatbots, Virtual Assistants & LLM Integrations ✅ Workflow & Customer Support Automation ✅ Smart Search & Recommendation Systems 📈 Proven Results & Business Impact: ✔ Reduced manual work by up to 95% in a client project through workflow automation, improving efficiency, accuracy, and productivity. ✔ Helped a USA-based digital agency increase organic traffic and search visibility by ranking multiple targeted keywords on Google's first page through On-Page and Technical SEO. ⚙️ Technologies & Tools: Frontend: React.js, Next.js, JavaScript, TypeScript, Tailwind CSS Backend: Node.js, Express.js, Fastify, MongoDB, AWS, Firebase, PostgreSQL, REST APIs Payment Integrations: Stripe, PayPal, Wise 🚀 How You'll Benefit Working With Me: ✔ Improve Google rankings, online visibility, and customer acquisition ✔ Automate workflows to improve efficiency and productivity ✔ Scale confidently with secure and future-ready technology ✔ Clear Communication, Reliable Support & On-Time Project Delivery Whether you need a Custom Website, E-commerce Platform, SaaS Platform, Marketplace, CRM, ERP, or AI Automation Solution, I can help transform your vision into a scalable custom web application as a Senior Full Stack Developer specializing in the MERN Stack, using React.js, Next.js, and Node.js. 🚀 If you have an idea, project, or business challenge, let's talk. I'll take the time to understand your goals and current challenges and help you find the right solution to scale with confidence. 📩 Even if you're still exploring your options, feel free to send me a message for a free consultation. I'll be happy to share the right technical guidance and recommend solutions that best fit your project requirements. Warm Regards, Md Tanvir Certified Senior Full Stack Developer (MERN)

If your Shopify store is slow, broken, losing conversions, needs a custom app built, or needs to connect to an external system — I have solved it before and I can solve it for you. I work 100% inside Shopify. Not a generalist who added Shopify to a skills list — a dedicated Shopify developer with 6 years of focused experience across app development, theme development, speed optimization, integrations, and CRO. I work best with DTC brands, SaaS founders building on Shopify, and agencies that need a reliable specialist for complex projects. CUSTOM SHOPIFY APP DEVELOPMENT I have built and shipped 4 apps through Shopify's full review process — OAuth, billing systems, GDPR webhooks, App Store compliance, and deployment. Most Shopify developers on Upwork have never done this. My published apps: Stock Alert — real-time inventory monitoring, auto-hide sold-out products, auto-republish when restocked, email and Slack alerts, GDPR compliant Shoppable Posts — turns blog posts into shoppable product displays with variant selection and add-to-cart DemandMind Forecasting — Shopify app layer over a client's AI forecasting engine, Python backend, multi-store support BGN to EUR Converter — live currency conversion display for Shopify stores Full stack: React, Node.js, TypeScript, Polaris, App Bridge, GraphQL, webhooks, PostgreSQL. Results clients have seen: Mobile Lighthouse score from 38 to 92 (Kind Laundry — full speed overhaul) OMS API response time cut from 4 seconds to 400ms Full print-on-demand fulfillment platform built from scratch Clean, accurate, matched the design perfectly. He handled technical details without needing constant direction. SHOPIFY THEME DEVELOPMENT Custom Shopify themes built from scratch — Liquid, Shopify 2.0, clean and maintainable code. No page builders, no shortcuts. Figma to Shopify — pixel-perfect conversion from any design file Custom sections, blocks, and templates Homepage, PDP, PLP, landing pages, full store builds Theme customization on Dawn, Prestige, Impulse, Refine and more Shopify Plus theme customization including custom checkout Mobile-first responsive design SPEED OPTIMIZATION AND CORE WEB VITALS A slow Shopify store is losing you money every day. I fix it with real numbers, not vague promises. Lighthouse score improvements with before and after results Core Web Vitals: LCP, CLS, FID fixes JavaScript optimization and cleanup App bloat removal and conflict resolution Liquid performance fixes and image optimization SHOPIFY PLUS DEVELOPMENT Custom checkout extensions and Checkout Extensibility Shopify Functions — discount logic, shipping rules, payment customization Shopify Flow automations B2B and wholesale store setup Multi-currency and international stores API INTEGRATIONS AND CUSTOM SOLUTIONS ERP, CRM, and OMS integrations Third-party payment and shipping systems Webhook architecture and real-time data sync Custom admin tools and automation dashboards GraphQL and REST API development LANDING PAGE DEVELOPMENT AND CRO High-converting landing page development UX audits — finding where customers drop off and why Product page and checkout flow optimization AOV improvements — bundles, upsells, cross-sells Trust signals, social proof, and review integration MIGRATIONS WooCommerce, Magento, Wix, BigCommerce to Shopify Products, customers, orders, metafields — all migrated SEO-safe URL structure and redirect mapping, zero data loss BUG FIXES AND TROUBLESHOOTING Theme bugs, broken layouts, JavaScript errors, app conflicts Liquid syntax and rendering issues Mobile display problems and post-update breakages Broken API integrations and performance regressions STORE SETUP AND ADMINISTRATION Full store setup — products, collections, navigation, shipping, taxes, payments App installation and configuration: Klaviyo, Yotpo, Judge.me, Recharge, Bold, PageFly Ongoing maintenance, analytics setup, GA4 and Meta Pixel tracking I give honest assessments. If something is not worth building or there is a simpler solution, I will tell you. I do not pad hours and I do not disappear mid-project. Code is production-ready before handover. Send me a message with what you are building, what is broken, or what system you need connected. I will give you an honest assessment and a clear path forward within 24 hours.

🚀 Senior Full Stack Developer | Laravel, Python, Node.js, React.js, Next.js | SaaS & AI Applications I’m a Senior Full Stack Developer with 10+ years of experience building scalable SaaS platforms, AI-powered applications, automation systems, marketplaces, CRM/ERP solutions, and enterprise-grade web applications for startups, agencies, and growing businesses worldwide. As a Full Stack Developer, I specialize in handling complete product development from frontend to backend, database architecture, APIs, cloud deployment, and long-term scaling. Clients work with me as a Full Stack Developer because I can manage the entire development lifecycle without relying on multiple teams or developers. I hold a Master in Computer Application (MCA) and have spent the last 10+ years working as a Full Stack Developer building secure, scalable, and high-performance systems using modern development frameworks and clean architecture principles. 🏆 10+ Years of Experience as a Full Stack Developer ⭐ Top Rated Full Stack Developer ✅ End-to-End Product Ownership ✅ Scalable Architecture & Clean Code Standards ✅ SaaS, AI & Automation Expertise as a Full Stack Developer 𝐑𝐞𝐚𝐥-𝐖𝐨𝐫𝐥𝐝 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐀𝐬 𝐀 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫: ✦ AI-powered helpdesk & customer support systems ✦ Technical SEO automation platforms ✦ Workflow automation systems using Make, n8n & Zapier ✦ LMS & eLearning marketplace platforms ✦ Healthcare eCommerce solutions ✦ Privacy protection SaaS applications ✦ CRM & ERP management systems ✦ Enterprise-grade reporting and automation platforms ✦ SaaS applications with billing, subscriptions, and analytics 𝐌𝐘 𝐒𝐄𝐑𝐕𝐈𝐂𝐄𝐒 𝐀𝐒 𝐀 𝐅𝐔𝐋𝐋 𝐒𝐓𝐀𝐂𝐊 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐄𝐑: • Full Stack Web Application Development • Laravel & PHP Development • Python Development (Django, Flask, FastAPI) • Node.js Development (Express.js, Nest.js) • React.js / Next.js Development • Vue.js / Nuxt.js Development • SaaS Product Development • AI & OpenAI API Integrations • Workflow Automation using Make, n8n & Zapier • CRM / ERP / Admin Panel Development • Marketplace & Booking Platform Development • Helpdesk & Ticketing System Development • REST API & Third-Party API Integrations • Payment Gateway Integrations • Database Architecture & Optimization • Cloud Deployment & Server Management • Application Scaling & Performance Optimization 𝐖𝐇𝐘 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐇𝐈𝐑𝐄 𝐌𝐄 𝐀𝐒 𝐀 𝐅𝐔𝐋𝐋 𝐒𝐓𝐀𝐂𝐊 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐄𝐑: ✅ Full Stack Developer with 10+ Years of Experience ✅ Business-Oriented Full Stack Developer Approach ✅ Strong Backend Architecture & Problem Solving ✅ Scalable & Maintainable Code Standards ✅ Reliable Communication & Project Ownership ✅ Long-Term Technical Support & Maintenance ✅ SaaS, AI & Automation Platform Expertise ✅ Fast Delivery with Scalable Architecture ✅ Complete Product Ownership by a Senior Full Stack Developer ✅ Dedicated Full Stack Developer for Long-Term Growth 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐈𝐄𝐒: ⚡ Frontend → React.js, Next.js, Vue.js, Nuxt.js, JavaScript, TypeScript, Tailwind CSS ⚡ Backend → Laravel, PHP, Python, Node.js, Express.js, Nest.js, FastAPI ⚡ Database → MySQL, PostgreSQL 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full Stack Developer | Senior Full Stack Developer | Python Full Stack Developer | Laravel Full Stack Developer | Django Full Stack Developer | FastAPI Full Stack Developer | Flask Full Stack Developer | React Full Stack Developer | Node.js Full Stack Developer | Next.js Full Stack Developer | Vue.js Full Stack Developer | MERN Full Stack Developer | MEAN Stack Developer | SaaS Full Stack Developer | AI Full Stack Developer | React Node Full Stack Developer | Laravel PHP Developer | Python Developer | Django Developer | FastAPI Developer | Flask Developer | Laravel Developer | PHP Full Stack Developer | React.js Developer | Node.js Developer | React Native Full Stack Developer | Java Full Stack Developer | Spring Boot Full Stack Developer | Angular Full Stack Developer | MongoDB Full Stack Developer | REST API Full Stack Developer | API Integration Developer | AI SaaS Developer | OpenAI Integration Expert | Workflow Automation Developer | SaaS Application Development | Multi-Tenant SaaS Developer | Enterprise Web Application Developer | Backend Developer | Frontend Developer | Web Application Developer | Full Stack SaaS Engineer | Laravel SaaS Developer | Python SaaS Developer | Node.js Backend Developer | React.js Frontend Developer | Nuxt.js Developer | Next.js React Developer | TypeScript Developer | JavaScript Full Stack Developer | PostgreSQL Developer | MySQL Developer | MongoDB Developer | Redis Developer | Docker Developer | Kubernetes Developer | AWS Full Stack Developer | Azure Full Stack Developer | Google Cloud Developer | DevOps Engineer | CI/CD Developer | Microservices Developer | Event-Driven Architecture | Kafka Developer | RabbitMQ Developer | Celery Developer | REST APIs | GraphQL Developer | WebSocket Developer | AI Automation Developer | n8n Developer | Make

I'm a full-stack developer with over 6 years of experience building fast, scalable web applications using technologies like React.js, and Next.js on the frontend, and Node.js, Express.js, Django, Flask, and FastAPI on the backend. My experience includes working with MongoDB, PostgreSQL, MySQL, and Firebase, along with deploying applications using tools like Docker/Kubernetes, GitHub, AWS, Vercel, and Heroku. I focus on writing clean, maintainable code and creating responsive, user-friendly interfaces that ensure high performance and reliability. 💻 Tech Stack I Use 🎨 Frontend ⚛️ React.js, Next.js 🎀 Tailwind CSS, Bootstrap, CSS 📱 Progressive Web Apps (PWA) 🛠️ Backend 🟢 Node.js, Express.js 🐍 Python (Flask, FastAPI) 🔌 REST APIs, GraphQL, microservices, authentication systems 🗄️ Databases & DevOps 🗃️ MongoDB, PostgreSQL, MySQL, Firebase ☁️ AWS, Vercel, Render, Heroku, Docker, Kubernetes, Terraform 🔧 Git & GitHub (team workflows, PRs, CI/CD integration) ✨ Additional Skills: → Payment Gateway Integrations: Seamless integration of various payment systems. → Messaging Protocols: MQTT & AMQP for real-time communication. → Caching: Redis for enhancing application performance. 🔹 My Development Process 1️⃣ Discovery Call – 💬 Understand your vision & requirements 2️⃣ Project Planning – 📅 Define timelines & milestones 3️⃣ Design & Development – 🎨 Regular updates & live previews 4️⃣ Testing & Launch – ✅ QA testing & smooth deployment 5️⃣ Ongoing Support – 🔄 30 days of free maintenance included 🚀 Ready to Start Your Project? Let's discuss how I can help transform your ideas into reality. I offer FREE consultation calls to understand your needs and provide a detailed project roadmap.

I help startups and businesses build scalable SaaS platforms, modern web applications, and high-performance mobile apps that are fast, reliable, and built to grow. Give me an idea and I’ll turn it into a production-ready product. That’s my promise. If you send me a message or invite me to your job, I’ll personally review your project and suggest the best technical approach before we get started. A little more about me: I build full-stack products for startups and businesses that need more than just a basic website. Whether it’s a SaaS MVP, a scalable dashboard, a customer platform, or a mobile app, I focus on building systems that are clean, maintainable, and ready to scale. I’ve worked on: • SaaS platforms • Admin dashboards • Mobile applications • Real-time systems • Authentication & payment integrations • Backend APIs • Cloud deployments • Cross-platform mobile apps Some recent results: • Built and deployed a SaaS platform supporting 5,000+ active users with 99.9% uptime • Improved backend performance by 40% through API and infrastructure optimization • Developed production-ready mobile applications for iOS and Android • Built scalable full-stack systems with modern frontend and backend architectures What separates me from a lot of freelancers is that I focus on building real production-ready systems, not just quick prototypes. I care heavily about: • Clean and scalable code • Fast communication • Long-term maintainability • Performance and user experience • Reliable delivery If you’re looking for someone who can properly build your product from start to finish, send me a message and let’s talk about your project. EXPERTISE: Full Stack Development | SaaS Development | Web App Development | Mobile App Development | Next.js | React | Node.js | TypeScript | React Native | Flutter | Firebase | Supabase | PostgreSQL | REST APIs | GraphQL | Backend Development | API Integration | Authentication Systems | Payment Integration | Dashboard Development | Cross-Platform Apps | AWS | Vercel | CI/CD