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Technologist and innovative developer. Over the past 4+ years, I’ve delivered 30+ web applications for clients in SaaS, startups, e-commerce and enterprise — always building with best practices, industry standards and modern AI integrations. I use Claude Code, Cursor, ChatGPT-5 and MCP servers daily to work faster without losing quality. Technical Expertise: • Frontend: Next.js, React, TypeScript, TailwindCSS, Shadcn/ui, SEO optimization, Figma-to-code • Backend: Node.js, Nest.js, RESTful APIs, third-party integrations • Databases: PostgreSQL, MongoDB, database management & administration • Cloud & Infrastructure: Microsoft Azure, AWS, Vercel, Supabase, Docker • AI Integration: OpenAI API, Machine Learning (Stanford certified), Generative AI, AI Agents, Prompt Engineering • Authentication: Auth.js, Azure Entra ID • Analytics: Google Tag Manager, Google Analytics, Google Ads • Payment & Scheduling: Stripe, Calendly, Cal.com • CRM: ActiveCampaign API P.S. Explore my portfolio and background at mauropolino.com

I help startups and businesses ship production-ready web and mobile products — faster than traditional development cycles, without cutting corners on quality. With 6+ years of full-stack experience, I specialize in building scalable applications end to end: modern web frontends with Next.js, robust microservice backends with NestJS, and cross-platform mobile apps with Flutter and React Native that follow platform best practices. I also work with AI-assisted development tools (Claude, Codex, and similar) as a core part of my workflow. The result for you: senior-level architecture and code review judgment, combined with significantly faster iteration on implementation, tests, and documentation. 🔹 What I do best: ✅ Web apps: Next.js (App Router, SSR/ISR), React, Vue (Quasar/Vuetify), TypeScript ✅ Mobile apps: Flutter & React Native — clean architecture, state management, store-ready builds ✅ Backends: NestJS microservices, Node.js/Express, Laravel (PHP), REST & event-driven APIs ✅ Databases: PostgreSQL, MySQL, MongoDB, Redis ✅ Integrations: Stripe, Twilio, SendGrid, and other third-party APIs ✅ AI features: LLM API integrations (Claude, OpenAI, Gemini), LangChain ✅ DevOps: Docker, Nginx/Traefik, AWS (EC2, S3, networking), CI/CD with GitHub Actions ✅ Architecture: Microservices, RabbitMQ, Redis caching & queues 🔹 How I work: ✅ Clear, proactive communication in fluent English ✅ Comfortable in Agile/Scrum teams (Jira, Asana, Trello, Git/GitHub) ✅ Pixel-perfect, performance-optimized implementations ✅ Honest estimates and reliable delivery If you need someone who can own a feature or product from database to deployed app — and move quickly without sacrificing maintainability — let's talk. Send me a message with a short description of your project and I'll reply with how I'd approach it.

Frontend Developer specializing in Shopify theme improvements, figma to real code, web accessibility, and user-friendly frontend experiences across Shopify, WordPress, and Angular platforms. I help businesses improve their websites by making them more accessible, easier to use, responsive, and maintainable. My work focuses on Shopify theme, Wordpress customization, accessibility remediation, keyboard navigation, semantic HTML, screen reader compatibility, and clean frontend implementation. I have experience improving existing interfaces without sacrificing design, performance, or long-term scalability. Whether it is a Shopify product page, cart drawer, navigation menu, custom section, WordPress page, or Angular component, I focus on building solutions that are practical, accessible, and easy to maintain. What I can help with: ✅ Shopify theme improvements and customization ✅ Shopify Liquid, HTML, CSS, and JavaScript updates ✅ Product page, collection page, and cart drawer fixes ✅ Accessibility improvements and remediation ✅ WCAG-focused frontend development ✅ Keyboard navigation and focus management ✅ Semantic HTML and ARIA implementation ✅ Accessible forms, modals, menus, product forms, and custom components ✅ WordPress accessibility fixes and customization ✅ Angular application development and maintenance ✅ Frontend debugging and UI enhancements ✅ Responsive and cross-browser development Tech Stack: ✅ Shopify / Liquid ✅ WordPress ✅ TypeScript / JavaScript ✅ HTML5 / CSS3 / SCSS ✅ Angular ✅ Git ✅ Responsive Design ✅ Accessibility Testing Tools(AXE, Wave, Accessible Web Helper, ANDI) I focus on delivering maintainable, accessible, and high-quality frontend solutions that improve both user experience and long-term project scalability.

You coded a working app on Replit, Lovable, or Base44 over the weekend. That part was easy. Then real paying customers showed up, and the setup that was fine for a demo started to break. Here's the simple truth about AI app builders. They excel at one thing: quickly turning an idea into a live app. This helps you win your first test users. But that's where it ends. These tools were never designed to run a real product for thousands of paying customers. Once you get actual traffic and money, you need infrastructure that these tools cannot provide. That's what I do. I take apps built on these tools and rebuild the underlying systems on AWS. This allows the product that already works to scale to thousands of paying users without breaking or wasting money. I set up the AWS architecture, automate your deployments, and keep everything stable, secure, and cost-effective as you grow. I have built backend and cloud systems for over 10 years, recently focusing on AWS, DevOps, and Infrastructure as Code. I have also worked inside a medical-device company, where reliability, clear documentation, and compliance were crucial. What clients say: 🏅 "Jose was amazing... he provided fantastic and specific advice which I value a lot. Will surely reconnect with him." (AWS API Gateway consultation, 5 stars) 🏅 "He is an expert with Terraform and AWS. Great addition for a technical team." (AWS data pipeline, 433 hours as lead architect) 🏅 Clients call my work reliable, collaborative, and high quality. We are a good fit if you are thinking: 🔑 "We built our MVP on Lovable, Replit, or Base44, and now it cannot handle the users we are getting." 🔑 "Our app works, but it slows down or goes offline every time we get a spike." 🔑 "We need real CI/CD and Infrastructure as Code, not manual clicks just to ship." 🔑 "Our cloud bill keeps going up and no one can explain why." 🔑 "We want someone senior who documents the work and stays around after launch." Working with me, you will 🎉 Stop struggling with infrastructure that fails when real traffic arrives. Your setup will be written as code, versioned, and easy to repeat rather than assembled by hand 🎉 Have automated and safe deploys, ensuring that shipping a change is never a scary moment 🎉 Get systems that are monitored and easy to debug, allowing you to identify problems before your users notice them 🎉 Have tracked and reduced costs, so growth doesn't deplete your budget 🎉 Receive a fully documented setup, making it easy for your team to continue the work even if I'm not available A few quick stats: 📈 100% Job Success Score and Top Rated across 13 Upwork contracts, with 500+ hours logged 📈 400+ hours as lead architect on one AWS data pipeline, taken from prototype to production 📈 Four AWS certifications verified by Upwork: Solutions Architect and DevOps Engineer (Professional), plus Developer and SysOps Administrator (Associate) 📈 10+ years building software, with a recent focus on AWS and cloud Tech I work with: 🛠️ Cloud & DevOps: AWS (EC2, ECS, EKS, Fargate, Lambda, S3, RDS, API Gateway, CloudWatch, IAM), Azure 🛠️ Infrastructure as Code: Terraform, CloudFormation 🛠️ CI/CD & Containers: GitHub Actions, GitLab CI, AWS CodePipeline, Docker, Kubernetes 🛠️ Backend & Automation: Python, Bash, Golang, FastAPI, Django 🛠️ Data & MLOps: PostgreSQL, MongoDB, Redis, data pipelines, production MLOps Building the app was the easy part. Keeping it alive as real customers arrive is my job, so your next challenge is growth, not survival. 👋SOUND LIKE A FIT? Press '...' button then ‘Send Message’ button in the top right-hand corner.

I am software developer with a Bachelor of Systems Engineering with more than 10 years of experience, 4 years experience in web-scraping/extraction using python frameworks and other tools. I can scrap any website and provide scraped/extracted data in any format you want: xls/csv/xml,json,mysql, etc. My experience and skills: - Data scraping / extraction, Data mining, Web-scraping - Scripting for Zoho, Googlesheets, AutoIt, AutoHotKey, PowerShell, Shell, Excel Macro VBA - Database: PostgreSQL, MySQL, Oracle, SqlServer, MS Acces, Sql Lite, FireBird - Docker - Linux: Fedora, CentOS, Debian, Ubuntu - Programming: Java, PHP, Python, JavaScript, Angular, React, Vue, Electron JS, NodeJS, TypeScript - FrontEnd: JSF, PrimeFaces, RtichFaces, IceFaces, Extjs - Persistence: Hibernate, JPA - Frameworks: Spring, Tapestry, Struts - Developer with Frameworks like Mendix, OutSystem

I’m a Senior Backend Engineer specializing in building scalable, resilient, and high-performance backend systems using Node.js, TypeScript, and AWS. My experience spans fintech, blockchain, analytics platforms, and real-time applications—where reliability, data integrity, and distributed architecture matter most. I focus on designing event-driven microservices, clean domain boundaries, and efficient integrations across complex ecosystems. I enjoy solving problems at scale: from API design and data pipelines to system architecture and cloud infrastructure. ⭐ Core Strengths • Backend engineering with Node.js, TypeScript, NestJS • Microservices, DDD, and distributed system design • Event-driven architectures using Pulsar, queues, workers • API ecosystems (REST, gRPC) and 3rd-party integrations • SQL & NoSQL data modeling (PostgreSQL, MongoDB, Firestore) • Cloud-native development (AWS Lambda, API Gateway, Docker, CI/CD) • High-throughput pipelines, ETL, and data-intensive workflows • Strong communication, ownership, and cross-functional collaboration 🛠️ Tech Stack Node.js · TypeScript · NestJS · Express · PostgreSQL · MongoDB · Firestore AWS (Lambda, API Gateway, S3, CloudWatch) · Docker · Pulsar · Queues REST · gRPC · WalletConnect · MetaMask · Ledger Testing · Clean architecture · Git workflows · CI/CD