When a client comes to me, they're not just looking for someone who can write code, They want a developer who understands what they're building and why. I work across the full stack, from architecting MongoDB schemas and Node.js APIs to building fast, production-ready React and Next.js frontends. On the cloud side, I handle AWS deployments, serverless functions, and infrastructure that scales without surprises. Most of my projects fall into one of a few patterns: SaaS platforms that need solid multi-tenant architecture, web apps where performance and SEO both matter (Next.js is my default choice here), backend systems where REST or GraphQL APIs connect to third-party services, and Python-based automation or data pipelines that save clients hours of manual work every week. My stack in practice: React with TypeScript, Next.js 14/15 App Router, Node.js with Express or NestJS, MongoDB with Mongoose, Python for automation and scripting, AWS (EC2, S3, Lambda, CloudFront, RDS), and deployment via Vercel, Docker, or CI/CD pipelines on GitHub Actions. I also integrate AI tools like OpenAI API, LangChain, vector databases into production applications when the project calls for it. What I've built for past clients includes a multi-vendor marketplace with real-time inventory sync, a Next.js SaaS dashboard with Stripe billing and role-based access, REST APIs handling over 50,000 requests per day, and MongoDB aggregation pipelines replacing what used to be hours of manual reporting. I communicate clearly throughout a project. You'll get updates without having to chase them, honest pushback when something isn't the right approach, and clean, documented code that your team can maintain after the project ends. I work well with both technical founders who want to go deep on architecture, and non-technical clients who need plain-language explanations of what's happening. If your project involves React, Next.js, Node, MongoDB, Python, or AWS or some combination of all of them I'd like to hear about it.

FinTech Full Stack developer with 7+ years building trading platforms, payment systems, neobank products, and financial dashboards. Top Rated Plus on Upwork. 100% Job Success Score. ✅ FinTech Full stack developer: trading platforms, payment APIs, neobank apps, financial data systems ✅ Real-time data, trading interfaces, and payment integrations | WebSockets, Stripe, REST APIs ✅ 7+ years | Full stack delivery from backend architecture to production UI ✅ 40+ full stack projects delivered | React, Node.js, TypeScript, PostgreSQL, AWS ⭐⭐⭐⭐⭐ "Michael is a strong full stack developer and blockchain developer. He was result-oriented from day one, communicated clearly, and delivered great work on time. The final result was exactly what we needed. Highly recommended." - Stockling Whether you need a trading platform built from scratch, a payment flow integrated into an existing product, a neobank MVP, or a financial dashboard with real-time data, I own the full delivery. Ready to start your project? Send me a message and I will respond same day. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FinTech Development Services & Stack ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Trading Platform Development: order book systems, real-time market data feeds, charting interfaces, position management, P&L dashboards ▸ Payment System Integration: Stripe, PayPal, crypto payment gateways, fiat on-ramp, KYC/KYB flow development, payment reconciliation ▸ Neobank and Banking App Development: account management, transaction history, card management, IBAN integration, open banking APIs ▸ Financial Data Dashboards: real-time data visualization, portfolio tracking, analytics dashboards, reporting systems ▸ DeFi and Web3 FinTech: DEX interfaces, yield farming platforms, staking systems, on-chain payment flows ▸ Frontend Engineering: React and Next.js component architecture, real-time data rendering, responsive production UI, Figma-to-React implementation As a FinTech developer I build financial products that work correctly and stay fast under real usage. Trading platforms need low-latency data delivery and an interface that does not get in the way of decisions. Payment systems need error handling and reconciliation logic that prevents financial discrepancies. Neobank apps need onboarding flows that pass compliance review. I build for all three requirements at once. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FinTech Development Tech Stack ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Backend: Node.js, Python, TypeScript, REST API, WebSockets for real-time data, PostgreSQL, Redis ▸ Frontend: React, Next.js, TypeScript, Tailwind CSS, charting libraries, real-time data rendering ▸ Payments: Stripe, PayPal, crypto gateways, open banking APIs, payment reconciliation systems ▸ Real-time & Integrations: WebSocket data feeds, third-party API integration, webhooks, background jobs ▸ Infrastructure: AWS, Docker, GitHub Actions, Vercel, CI/CD pipelines ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Industries ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ FinTech and Payments: trading platforms, payment systems, neobanks, financial data products ▸ Web3 and DeFi: decentralized exchanges, on-chain payment flows, crypto FinTech products ▸ SaaS and B2B: financial SaaS platforms, admin dashboards, analytics and reporting tools ▸ Investment and Wealth: portfolio management UIs, investment platform development, financial analytics I am a FinTech full stack developer specializing in trading platform development, payment system integration, neobank product builds, and financial data applications. My technical stack covers Node.js and Python backends, React and Next.js frontends, PostgreSQL and real-time data pipelines, and payment gateway integration across fiat and crypto. I work across the full stack, which means I take FinTech products from backend architecture through to a polished, production-ready interface in a single engagement. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Let's Build ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you need a FinTech full stack developer who owns the build end to end, from backend architecture to production UI, send me a message and let us get started.

🔹 100% Guaranteed Delivery or Full Refund 🔹 I am a Full-Stack Web Application Developer with over 6 years of experience, specializing in both custom technology stacks and CMS platforms. I take full ownership of end-to-end project delivery, ensuring quality, scalability, and timely execution. Expertise Across Technology Stacks: ✅Frontend: Laravel, CodeIgniter, Core PHP, React, Vue, Angular ✅ Backend: Node.js, Laravel, PHP, CodeIgniter, Strapi (Headless CMS) ✅ Databases: MySQL, SQL Server, PostgreSQL, MongoDB ✅ CMS Platforms: WordPress, Duda, Webflow 🛒 E-Commerce: Shopify, Shopify Plus, WooCommerce, Magento Custom theme and plugin development ✅ Testing & DevOps: Unit Testing, CI/CD Pipelines, GitHub Repos, Build Strategy, Test Plans, NuGet Package Feeds ☁️ Cloud Infrastructure: AWS, Microsoft Azure, Google Cloud, Dockerized applications using Jenkins & Kubernetes ✅ API Integrations: SMS/IVR: Twilio, Esendex, Payments: Stripe, PayPal, Authorize.NET, Google Checkout Chat: WebRTC, QuickBlox Social: Facebook, Twitter, LinkedIn ✅ Source Control: GitHub, GitLab, Bitbucket, TFS Personal Traits: ✅Excellent communication & fluent in English ✅Strong analytical and problem-solving skills ✅Deep understanding of business & technical requirements ✅Proven team player with leadership experience ✅ Client Feedback Highlights: - "Project completed quickly and accurately. Thank you!" - "Strong team, good learners, and very responsive." - "Very helpful. Completed all requirements as agreed and within estimated hours!" Whether it's building from scratch or scaling existing applications, I bring a commitment to quality, collaboration, and timely delivery. Let’s connect to bring your vision to life!

Hi, I am Zobaidul karim working as a Senior software engineer with a Master's Degree in Computer Science and engineering from Jagannath University I have 8+ years of experience developing a custom website, Core APIs, Database creation, and many more. If you are looking for a Reliable and self-motivated Web developer for your Web Project, then you are in the right place. Just send me a message so that we can discuss it. I have experience working with Node.js, MySQL, MsSQL, MongoDB, and AWS on the back end, and HTML5/CSS3/JS/jQuery/React.js on the front end. I have also DevOps Experience Docker, Kubernetes, CI/CD, AWS serverless API development, Cloud Storage, EC2, ECR, RDS Choosing a web developer can be daunting. When you decide to work with me, you get a partner who responds to emails, gets things done, and is committed to helping you succeed.

Senior Node.js Developer. Over 10 years building production Node.js, NestJS, and TypeScript backends end-to-end. Full-stack ownership across React, Angular, and the messy migrations between them. EdTech / healthcare: Ionic + web for education; HIPAA-oriented SaaS backend work. Mobile scale: backend optimization for a fitness product with 10M+ downloads and heavy transaction load. Angular: long-term products, migrations, enterprise UI, maintainable modules. Strong proof on large Angular codebases when that is the job. AI integration where it earns its keep: OpenAI / Gemini for document automation and workflow APIs. What I deliver: - Production Node.js + NestJS backends, TypeScript end-to-end - Express services, microservices architecture, REST and GraphQL APIs - Backend optimization at mobile-app scale (10M+ downloads case) - Angular front-ends and migrations when the project needs full-stack ownership - AI integration where it serves the product Tech stack: Node.js, NestJS, TypeScript, Express, Angular, React, MongoDB, PostgreSQL, REST/GraphQL, Firebase, Git. Senior Node.js Developer, Node.js Developer, NestJS Developer, Backend Developer, TypeScript Developer, Angular Developer, Full Stack Developer, Microservices Developer, Backend Architect.

🚀 Shopify & AI Automation Developer | Custom Apps, SaaS, CRM & OpenAI Solutions Looking for a developer who can build, automate, and scale your business? I help eCommerce brands, startups, agencies, and growing businesses build high-converting Shopify stores, custom Shopify apps, AI-powered automation systems, SaaS platforms, CRM solutions, and scalable web applications. With 10+ years of experience in Full Stack Development, Shopify Development, Cloud Infrastructure, and Business Process Automation, I deliver solutions that improve customer experience, automate repetitive tasks, and drive business growth. Whether you need a Shopify store, custom app, AI chatbot, SaaS platform, CRM integration, or workflow automation, I can handle the entire development lifecycle—from planning and architecture to deployment and ongoing support. ⭐ Shopify Development & E-commerce ✔ Shopify Store Development ✔ Shopify Theme Customization ✔ Shopify Plus Development ✔ Shopify App Development ✔ Shopify API Integrations ✔ Checkout & Payment Integrations ✔ Subscription & Membership Systems ✔ Shopify Performance Optimization ✔ Conversion Rate Optimization (CRO) ⭐ AI Automation & OpenAI Solutions ✔ AI Agents & AI Assistants ✔ OpenAI & ChatGPT Integrations ✔ AI Customer Support Systems ✔ AI Lead Qualification Systems ✔ Workflow Automation ✔ CRM Automation ✔ Business Process Automation ✔ AI Chatbots & Virtual Assistants ⭐ SaaS & Custom Web Application Development ✔ SaaS Platforms ✔ CRM Systems ✔ Marketplace Platforms ✔ Admin Dashboards ✔ Multi-Tenant Applications ✔ Custom Business Portals ✔ API Development & Integrations ⭐ Full Stack Development Frontend: • React.js • Next.js • Angular • TypeScript • Tailwind CSS Backend: • Node.js • NestJS • Laravel • Express.js • MongoDB • PostgreSQL • MySQL ⭐ Cloud & DevOps ✔ AWS (EC2, Lambda, S3, RDS) ✔ Docker ✔ CI/CD Pipelines ✔ GitHub Actions ✔ Serverless Architecture ✔ Cloud Deployment & Scaling Why Clients Choose Me ✅ 10+ Years of Development Experience ✅ End-to-End Product Development ✅ Strong System Architecture Expertise ✅ Shopify & E-commerce Specialist ✅ AI Automation & SaaS Development Expertise ✅ Fast Communication & Reliable Delivery ✅ Long-Term Technical Partnership Industries Served: Healthcare • Real Estate • Education • FinTech • Hospitality • E-commerce • SaaS Startups • Marketing Agencies If you're looking for a reliable Shopify Developer, AI Automation Expert, or Full Stack SaaS Developer who can build scalable solutions and deliver real business results, let's discuss your project. Let's build something exceptional together. Vikram Top Rated Shopify & AI Automation Developer

TOP RATED PLUS Full Stack Web and Mobile App Developer, having in-depth expertise in Node, Express, Angular, React, React Native, Flutter, Swift, RESTful API development, third-party API integration, Chat & Messaging, MongoDB, MySQL, MS SQL Server, SQLite, PostgreSQL Have expert knowledge in Python** to practice AI ➥ What my Upwork client says: ============================= ✅ Great work on time, A1 team! Will work again with them anytime. Highly recommended ✅ Great Team, Great Work, Completed on time and on budget. We will be working with them again for sure! A++ Freelancer ✅ Good job with the work done so far, happy with the team ✅ Nice work. ➥ Technical Skill Set: ===================== ✅ Frontend Development: ★ AngularJS 1.x to Angular 15.x ★ React.js, Redux, RxJS ★ React Native ★ Flutter ★ FlutterFlow ★ HTML5, CSS3, Bootstrap ✅ Backend Development: ★ Node.js, Express.js ★ Python (FastAPI, Flask) ★ RESTful API development ★ AI/ML model integration ★ Chat & Messaging Systems ✅ Databases: ★ MongoDB ★ MySQL ★ MS SQL Server ★ SQLite * PostgreSQL ✅ DevOps & Deployment: ★ Docker, CI/CD ★ Nginx, Jenkins ★ GitHub, GitLab, Bitbucket, TFS ★ Deployment tools: Gunicorn, WebPack, Babel, Gulp/Grunt ★ Cloud Platforms: AWS, Azure ✅ Project & Workflow Tools: ★ Asana, Trello, Jira, Basecamp ✅ CMS & No-Code Platforms: ★ Headless CMS (Strapi) ★ Bubble.io ★ FlutterFlow ➥ Machine Learning & AI Expertise: ================================ ✅ Generative AI (e.g., GPT-3, ChatGPT, OpenAI) ✅ NLP & Text Analysis – chatbots, parsing, information extraction, full-text search ✅ Machine Learning – object detection, classification, clustering, forecasting ✅ Time Series Forecasting – traffic prediction, churn analysis, insurance estimation ✅ AI Backend – FastAPI, Docker, Gunicorn ✅ Frameworks – TensorFlow, PyTorch, Scikit-learn, Spark MLlib ✅ End-to-end model design, training, and production deployment ➥My background in numbers: ========================= ✅ 6+ years of full-stack web and mobile development experience. ✅ Worked on over 20+ SaaS-based web solutions. ✅ 12+ mobile applications that include Fintech, Attendance tracking, Social Networking, Cab-service, LMS, ERP, Booking application, Marketplace, eCommerce, Real estate, Construction Management, Digital Wallet, etc. Thanks for reviewing my skill.

Hi! I'm Abdullah Obaid, a results-driven Full Stack Engineer with 6+ years of experience building scalable web, mobile, and AI-powered solutions. I specialize in modern JavaScript frameworks like React, Vue.js, NestJS, mobile app development with Flutter Whether you're launching a startup, scaling a SaaS product, or need AI-powered content tools—I can deliver robust, high-performance solutions with clean, maintainable code. ✅ Why work with me? 🚀 Built and led the development of TRT Global, a platform in 45+ languages, with AI content generation & social publishing. 📱 Delivered the Kapsül App (4.7★) on iOS & Android using Flutter. ☁️ Expert in AWS Cloud Services: Lambda, S3, EC2, Route53, WAF, and scalable architectures. 🤖 Hands-on with AI integration, Web3 systems, and complex data modeling. 💻 Strong background in backend systems (Node.js, Laravel, PHP) and database optimization. 🧠 Communicator & mentor: ran workshops, implemented dev best practices, and reduced bugs by 35%. 🛠️ Core Tech Stack: React | Vue.js | NestJS | Node.js | Laravel | C# | .NET | Flutter | MongoDB | MySQL | AWS | Git | Web3 | AI APIs 🔧 Services I Offer: Full-Stack Web & Mobile App Development AI-Powered Platform Features Payment Gateway & Web3 Integration CMS & Multilingual System Architecture DevOps & Cloud Deployment (CI/CD, AWS) Performance Optimization & Debugging Let’s build something great—on time, and with pixel-perfect quality. Contact me to discuss your project today!

A senior software engineer with over 15 years of experience developing and deploying successful web applications across various industries. Proficient in a wide range of technologies, with a strong focus on full-stack JavaScript development. In the age of AI, software development is taking a new turn. With the power of AI, the future looks totally futuristic. Hopefully, we will be able to create a more beautiful web experience which will bring peace and prosperity to all beings. This year, I am working with - Language: Typescript/Javascript, Java, Kotlin, PHP, Python API: Nestjs, ExpressJS, FastifyJS, FastAPI Database: ArangoDB, MongoDB, MariaDB, Postgresql Frontend: Nestjs, Nuxtjs, Solid Start, Reactjs, Vuejs, Solidjs UI: Shadcn/ui, Tailwindcss, MUI Testing Framework: node:test, k6 Cloud: Google, AWS, Digital Ocean Git: Github, Gitlab CI/CD: Github Workflow Web development and solving problem is my passion. I am an expert on it. Let's talk, hopefully, my experience will come in handy to you. Thanks

I help startups and operations teams turn messy processes, spreadsheets, and disconnected systems into clean internal and external tools inside Retool. If your team is: • manually updating spreadsheets • switching between 5+ tools • struggling with slow dashboards • or spending hours on repetitive operational work I built a Retool app that replaces it. I’m a Certified Retool Expert with 7+ years of experience building production-grade internal & external tools, admin panels, and data dashboards used daily by real teams, not prototypes. What I commonly build: ✔ Operations dashboards ✔ CRM & admin panels ✔ Approval workflows ✔ Billing & reporting systems ✔ Inventory and order management tools ✔ Data visualization & analytics dashboards ✔ Automation panels (email, notifications, background jobs) What you get (this is why clients hire me): ✔ Faster operations (teams usually save 10–30 hrs/week) ✔ One system instead of many tools ✔ Reliable dashboards executives actually trust ✔ Secure user roles & permissions ✔ Clean UI your team can actually use My Retool Expertise: ✔ Multi-page Retool apps & Modules ✔ Complex queries & transformers ✔ Query performance optimization ✔ User permissions & authentication ✔ Staging → Production deployment ✔ Version control & maintainable architecture ✔ Data & Automation ✔ Retool app embedding into external portal Data, Backend & Automation I don’t only build the interface, I design the data flow behind it. ✔SQL (PostgreSQL, MySQL, MariaDB, SQL Server) ✔BigQuery & analytics pipelines ✔ETL & data processing ✔REST & GraphQL APIs ✔Scheduled workflows & background jobs ✔Integrations & APIs I Frequently Connect with Retool Databases & Warehouses PostgreSQL • MySQL • MariaDB • MongoDB • SQL Server • Supabase • Firebase • BigQuery • Snowflake • Redshift • ClickHouse • OpenSearch / Elasticsearch • Athena • DynamoDB Spreadsheets & Data Sources Google Sheets • Excel (OneDrive) • Airtable • CSV ingestion • Webhooks • SFTP feeds Payments & Finance Stripe • PayPal • Razorpay • QuickBooks • Xero • Chargebee • Paddle • Zoho Books CRM & Sales HubSpot • Salesforce • GoHighLevel • Pipedrive • Zoho CRM • Close CRM • Copper CRM Communication & Notifications Slack • Twilio (SMS/WhatsApp) • SendGrid • Gmail • Outlook • Discord • Telegram Bots Cloud & Storage AWS S3 • CloudFront • Google Cloud Storage • Firebase Storage • DigitalOcean Spaces Automation Platforms n8n • Make • Zapier • Webhooks • Scheduled workflows AI & External APIs OpenAI • REST APIs • GraphQL APIs • OAuth2 authentication E-commerce & Operations Shopify • WooCommerce • ShipStation • EasyPost Analytics & Tracking Google Analytics • Mixpanel • PostHog • Amplitude • Metabase Tech Stack JavaScript • React • Node.js • Python • AWS Why Clients Work With Me I don’t just execute tasks. I analyze your operations and suggest better workflows before building — many clients end up automating far more than they initially planned. Clear communication, independent work style, and long-term maintainable solutions are my priorities. If you’re looking for a Retool specialist who understands both business operations and technical architecture, send me a message and tell me what process you want to improve. I’ll recommend the best approach, even before you hire me.