I am passionate about software development...it’s not just my career, it’s my hobby. I have more than 18 years of experience. I'm based in Costa Rica, Central America; one of the most educated countries in the whole of Latin America. I'm constantly striving to learn new things and improve. I DO follow industry news, regularly tinker with new technologies, and read books and blogs to keep my skills current. - I work well alone or within a team environment and enjoy working with my colleagues. - I always use GitHub to keep track of my code and push commits daily - I am fluent in English and Spanish and I'm learning German as a third language, I always write documentation for the code I write and comments. Please, feel free to contact me and let's discuss further details of your projects.

A software engineer with 17+ years of experience in custom software, web & Mobile app development. I’ve worked across the full Software Development Life cycle (SDLC) as a developer, scrum master, team lead, and manager. I am passionate to delivering robust and quality solutions for SMEs all the way up to the Enterprise level. My approach is collaborative and I always consider the client as a partner for the long term. I am skilled in handling multiple projects and ensuring delivery of each project within the time and cost parameters and experienced in various domain applications: ## Experience : ✓ .NET Desktop (WinForms, WPF: MVVM, MVP); ✓ Windows 8.1 and 10 universal application development (UWP); ✓ Prism, MVVM Light; ✓ Telerik and DevExress frameworks for WinForms and WPF; ✓ Microsoft Dynamics 365 - CRM (Sales, Marketing, Field Services, Project services & Customer Services) ✓ Microsoft Dynamics 365 - Business Central / NAV ✓ Microsoft Dynamics 365 - Finance and Supply Chain / AX ✓ PowerApps (Power Automate, Virtual Agents, Azure Communication Services, PowerBI) ✓ AWS (EC2, Lambda, ECS, Lightsail, S3, RDS, DynamoDB, VPC, Cloud Front, API Gateway, Cognito, CloudWatch, CloudTrail, Rekognition, Polly, Transcibe, Eventbridge) ✓ Azure (Virtual Machines, App Services, Kubernetes, Container, Blob, SQL, CosmosDB, Synapse, Load Balancer, Application Gateway, Azure Machine Learning, Cognitive Services, Bots, Logic Apps, Service Bus, Event Grid, Event Hubs, DevOps, CLI, PowerShell, SDKs, Data Factory) ✓ .NET / .NET Core C#; ✓ TypeScript ✓ ASP.NET MVC / Web API; ✓ ASP.NET Core; ✓ AngularJS ✓ React ✓ Flutter ✓ Kendo UI (JS and ASP.NET MVC wrapper) and DevExtreme; ✓ Bootstrap ✓ WCF and web services; ✓ Rest API design, architecture, implementation, and integration; ✓ SVN and TFS version control systems; - LINQ, Entity Framework, ADO.NET - XML - MS SQL Server, T-SQL - SQLite, MySql - WIXSharp - Windows Forms (WinForms) - CI/CD: Jenkins, Bamboo - Revision control: Bitbucket - Cloud providers: Azure & AWS services - System deployment, configuration, and optimisation - Single point of contact for IT/support-related incidents - Internal infrastructure optimisation - Various Linux debugging tasks - Server health monitoring Web server tech: Nginx, Apache, Haproxy, Varnish Databases: MySQL/MariaDB, MongoDB, MSSQL Revision control: Git Provisioning and app containers: Pipeline, Docker Cloud providers: AWS & Azure Security: iptables, VPN, fail2ban Looking forward to work with you.

Most MVPs and SaaS products fail not because of bad ideas, but because of poor architecture that doesn't scale. I'm a Top Rated SaaS Developer and Mobile App Architect specializing in scalable MVP and production systems - 90+ projects completed, $200K+ earned, and products serving 200,000+ active users. I work with startups, founders, and growing companies to turn ideas into scalable, production-ready products. I don't just write code. I design systems that scale from day one, so you never face expensive rebuilds later. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 SaaS platforms with multi-tenant architecture and role-based access iOS & Android apps using Flutter and React Native MVPs built for speed without sacrificing long-term scalability AI-integrated apps, smart workflows, ChatGPT-powered features Subscription platforms, payment systems, and monetized apps Admin dashboards, backend APIs, and cloud infrastructure 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 Before writing code, I map your full architecture and identify decisions that could cost you heavily later if done incorrectly. Most developers skip this. I don't. Every project runs on structured milestones with clear deliverables. You always know what's built, what's next, and why. The products I've built serve 200,000+ active users - still running, still scaling, without expensive rebuilds. I stay involved after launch to support scaling, improvements, and long-term growth. 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 EdTech • SaaS & B2B • On-Demand & Logistics • Healthcare • E-commerce • Social & Community 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 Mobile: Flutter, React Native, Firebase Backend: Python, Django, Node.js, REST APIs Frontend: React, Next.js, Angular Infrastructure: AWS, GCP, Docker Payments: Stripe, subscriptions AI: OpenAI API, automation, intelligent workflows 𝗥𝗲𝗰𝗲𝗻𝘁 𝗪𝗼𝗿𝗸 EdTech SaaS platform with subscriptions and a multi-role system Fleet operations mobile app with real-time tracking and dispatch On-demand delivery platform with a full ecosystem and real-time management 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱? Send me a message with what you're building, your timeline, and your biggest technical concern. I'll respond with honest guidance and clear next steps.

Hello Clients, I help startups and growing companies build, fix and scale SaaS platforms, mobile apps and complex backend systems that actually work in production. With 16+ years of experience and $2M+ earned on Upwork, as of now, I have delivered 500+ projects and worked over 19,000+ hours to help businesses launch stable, scalable and maintainable products used by real customers worldwide. If you're dealing with: • A half-built product that keeps breaking • Poor code quality from previous developers • Scaling issues or performance bottlenecks • Complex APIs or third-party integrations • Need to build MVP fast and correctly I step in, take ownership and turn it into a clean, production-ready system. 💼 What I Deliver: • SaaS platforms (from MVP to scale) • Full-stack web applications (React / Next.js + Node.js) • Mobile apps (Flutter / React Native – iOS & Android) • AI-powered features & integrations (OpenAI, automation) • API architecture & third-party integrations • System redesign, optimization, and long-term scaling ⚙️ My Approach (Why clients stick with me): 1. Deep understanding of your business & goals 2. Clean architecture planning (not quick hacks) 3. Scalable, maintainable code 4. Transparent communication & regular updates 5. Long-term support & reliability I don’t just “code features” I build systems that grow with your business. 🧠 Tech Stack: Frontend: React.js, Next.js Backend: Node.js, Express.js Mobile: Flutter, React Native Database: MongoDB, PostgreSQL, Firebase AI: OpenAI APIs, AI integrations Cloud: AWS, Firebase If you’re serious about building or scaling your product, let’s talk. I’ll help you define the right approach before we even start development.

AI-powered software, automation systems, and applications built to streamline real business operations Many companies grow faster than their internal systems. Processes that once worked manually start becoming inefficient. Teams spend time entering data, responding to repetitive inquiries, or switching between disconnected tools. I help businesses solve that problem by building AI-powered software, automation systems, and custom applications that connect workflows, automate tasks, and make operations more efficient. My focus is on AI Voice Agents, AI chatbots, AI software, and AI automation systems that integrate with existing platforms such as CRMs, messaging tools, databases, and internal business systems. AI Voice Agents & AI Chatbots I build AI voice agents and conversational AI systems that automate communication with customers, leads, and internal teams. Services include: • AI Voice Agents for inbound and outbound calls • Conversational AI Chatbots for websites, WhatsApp, and messaging platforms • Lead qualification and automated customer support systems • Voice AI integrations using tools like VAPI and Retell AI • AI agents that integrate with CRMs and internal databases These systems allow businesses to respond instantly to customers while reducing manual workload. AI Automation & Workflow Systems I design and implement AI automation systems that connect tools and automate repetitive tasks. • Workflow automation using n8n and Make • Intelligent AI Agents that analyze data and trigger actions • CRM automation and marketing workflow automation • AI-driven reporting and operational insights • End-to-end AI Automations that streamline internal processes Custom AI Software & Platforms Beyond automation, I build custom AI-powered software systems tailored to business operations. • AI Software Development using Node.js and Python • Custom AI Agentic Solutions for operational workflows • Integration of OpenAI and Claude LLM models into software platforms • Backend systems and API integrations • AI Custom Solutions designed around real business use cases These platforms help companies centralize their operations and eliminate fragmented systems. Mobile Application Development I also build mobile applications that integrate with backend systems and AI-powered services. • Mobile Application Development for operational tools • iOS application development and cross-platform solutions • Field service apps for managing teams, jobs, and workflows • Apps integrated with automation systems and databases Real Systems Built for Real Businesses I have built AI-powered platforms and automation systems for multiple companies including: • So Special Mobile Mechanic – AI-infused mobile application and operational platform • Al Arabi Company – dispatch system for operations and maintenance management • Mystical Agency and Intero Digital – AI automation and proposal generation systems • AI chatbot and WhatsApp automation systems for clinics and service businesses These systems typically include AI agents, automation pipelines, mobile apps, dashboards, and backend integrations that help businesses manage operations more efficiently. Technology & Tools My systems are typically built using: • Node.js and Python for backend development • OpenAI and Claude for LLM-based AI systems • n8n and Make for workflow automation • VAPI and Retell AI for voice agents • API integrations with CRMs, marketing tools, and databases Ideal Clients I work best with businesses that need to: ✔ Automate manual processes ✔ Build AI-powered applications or platforms ✔ Integrate systems across multiple tools ✔ Develop custom software or mobile applications ✔ Introduce AI into operations to improve efficiency Most of my clients are companies whose operations have grown faster than their internal systems — and they need technology that can automate workflows, connect tools, and scale with their business. If you're looking to build AI-powered software, automate workflows, deploy AI voice agents, or develop custom applications, feel free to message me and let's discuss your project.

I help enterprise and operations-heavy teams turn messy business processes into reliable systems. I’ve spent 15+ years building and leading production software systems: .NET platforms, Azure infrastructure, SQL databases, APIs, internal tools, reporting workflows, and business-critical applications. That background lets me bridge the gap between AI experimentation and software that a real business can actually depend on. I work best where software needs to connect with real operations - documents, databases, CRMs, spreadsheets, internal portals, legacy systems, approval workflows, reporting processes, and human review steps. I use Claude Code and OpenAI Codex as part of my daily engineering workflow: reviewing codebases, planning features, accelerating development, testing ideas, refactoring safely, and turning business requirements into working software faster. My value is knowing how to apply AI inside real production environments where architecture, security, data quality, maintainability, and auditability matter. I can help with: 🔧 Process Engineering - mapping workflows, finding automation opportunities, and designing safer AI-assisted processes 🤖 AI Automation - document processing, internal tools, reporting automation, CRM/data-entry support, and review queues 🧠 AI/LLM Development - assistants, RAG/search, structured outputs, guardrails, evaluations, and human-in-the-loop workflows 🏗️ .NET / Azure / SQL Integration - connecting AI into existing enterprise systems without creating fragile side projects 📐 Fractional CTO / Technical Lead Support - architecture, roadmap planning, risk review, estimates, and execution strategy A typical first step is a short discovery and workflow review. From there, I give you a prioritized plan: what can be automated, what should stay human-reviewed, where the risks are, what it will cost, and what can be shipped first. Message me with your current process, stack, pain point, and deadline. I’ll help you turn the time-sink into a working system.

C#, ASPNET MVC, MS SQL Server, IIS, PHP, MySQL/MariaDB, REST and SOAP APIs, complex system integrations (Brivo, Eagle Eye, CICS, IMS), payment gateway integrations (Stripe, PayPal, etc.), B2B software integrations (QuickBooks, JobDiva, and others), with 20+ years of experience across the full software development life cycle. Over the last 10+ years, I have been actively working with cloud environments such as AWS and Azure, designing, deploying, and operating scalable, secure, and production-grade systems. I also bring 15+ years of experience with HTML, CSS, Vanilla JavaScript, and multiple JavaScript frameworks, delivering high-quality, responsive web applications used in real-world production environments. Expertise includes ERP and CRM implementations, Business Intelligence, KPI definition, process mapping and automation, and bespoke software development — always with a strong focus on results, sustainability, and business clarity. In recent projects, my role has leaned heavily toward Solution Architecture, including system design, integration strategy, legacy modernization, and cloud-ready architectures — always balancing technical decisions with business impact. Last 2 years dedicated to create strategies, policies and practices to use AI sustainabily, focused in get the most of the technology at reasonable costs, preventing code slop and sdlc overstress. I particularly care about getting your team ready to be the next generation of developer fully AI ready. Most importantly, I know how to help your company grow, your startup win, and your product shine by applying all my skills to one thing: business success. If you are looking for organization, versatility, architectural thinking, and a strong focus on results, it will be a pleasure to work with you.

✅ .NET Full Stack Developer 20+ years of experience ✅ Build powerful .Net solutions that drive business growth ✅ C# .Net developer with 15+ years of experience ✅ Developed 50+ applications ✅ Crafted 200+ user-friendly interfaces that drive real business results. The clients say "It doesn't feel like outsourcing, but instead like we have our own remote developers." "They had great soft and hard skills and were full of ideas and drive!" I lead the fullstack and mobile development team at Itexus, a professional software development and consulting company focused on Fintech, Insurance, Healthcare, etc. I have 20+ years of experience in the .net architect development of web and mobile applications, .net, python, node.js, java developer as well as javascript, react .net, angular, AI frameworks and libraries. 👨‍💻.NET Full Stack Expertise .NET full stack – strong background in End-to-end development from database to UI using Microsoft stack .NET Core – deep expertise, cross-platform backend services .NET Angular – Full stack development on .NET backend and Angular frontend for enterprise-grade solutions .net core angular – Building complete systems with seamless backend–frontend integration .NET Core Angular – Scalable and secure web apps using .NET Core and Angular Angular .NET solutions – Using Angular for UI and .NET for API and business logic .net core developer – Proven experience delivering high-performance backend solutions using .NET Core .net core react – Building robust, scalable web applications with .NET Core APIs and React frontends c# .net developer – End-to-end development expertise using C# and the .NET ecosystem c# .net core – Advanced solutions built on C# with .NET Core for modern, cross-platform applications 👨‍💻 BACKEND Development Python: Expert in Python for server-side development Frameworks: Proficient in Django and Flask for building web applications Databases: Skilled in SQL, PostgreSQL, MySQL, and MongoDB for efficient data management Architecture: Experienced in applying MVC patterns for scalable applications APIs: Capable of integrating external services through REST and GraphQL 👨‍💻 FRONT END Development Proficient in HTML5, CSS responsive, JavaScript Experienced in React.js, Angular, Vue.js, react native, ionic, xamarin developer Responsive, cross-browser, ui/ux designer, ux/ui dashboard, ui ux designer app 👨‍💻AI TOOLS OpenAI API, DeepFace, ML/DL frameworks (TensorFlow, Keras, PyTorch, Scikit-learn), LangChain, Mistral, AgenticAI, Transformers RAG + custom AI tools: Document recognition and processing, Market Grabber, project management bots, AI for telephony, video/audio analysis Mobile App Development Native Mobile Development: Android, Kotlin, Java, iOS, Swift, KMP, KMM. Cross-Platform/Hybrid App Development: Flutter, Swift, Objective C, React Native, Xamarin, MAUI. General Expertise Website & Full Stack Development: Full stack development with ai .net full stack developer, .net software engineer, .net programmer, full stack developer, ai python full stack developer django, full stack web developer, full stack development, cms developer DevOps/DevSecOps: AWS, Azure, Docker, Kubernetes, GitLab-CI, Ansible, Terraform, etc Cross-platform app building with three.js, web application design, webflow web designer, website builders Integration tools: Data integration, websockets, ABP Framework, discord, Autotask Experienced in .net core web api, fullstack .net developer roles, with strong skills as a .net specialist. Skilled angular .net react developer, java developer with solid c sharp expertise. Worked on kogito for business automation, delivered ui ux-focused solutions. As an azure data engineer, handled scalable data pipelines. rust developer, python projects include backend developer tasks. Built app as a xamarin and web developer using java and javascript. Skilled in postgresql and web scrapping. Maintained legacy systems with .net webform. Collaborated with nft marketers, managed nft collab manage tasks. Full stack with react nodejs, modern react, including react typescript, react native developer roles. Acted as product owner in agile teams. Cloud deployments done on azure. Built interactive UIs using blazor. Why Choose us Microsoft certified talented developers and senior .net developer team High QA standards, including qa engineer roles Modern solutions: NFT programmer, metaverse, Microsoft .net, windows 10, Power Apps developer, SharePoint, market grabber Scalable team: full stack software developer, front end programmer, ios developer, ui ux designer Industries Banking, Trading, Cryptocurrency, Asset Management, Lending, Retail, Real Estate & Property Management, Food Delivery, Entertainment, Hospitality, Construction, Sports & Fitness, Travel & Tourism, Wellness, Medical Dashboard, Marketplace, E-commerce, Automotive, Human Resources, Education, E-learning, AI Assistants Seek new projects to put our .net ai, bring value to individuals, startups, companies.

I help healthcare companies and digital health teams build mobile apps faster, securely, and cost-efficiently, especially for connected devices, BLE integrations, and regulated environments. Instead of managing separate codebases, I deliver a single, scalable cross-platform architecture that supports medical-grade mobile applications, reduces development time by 40–60%, and maintains native performance. My focus goes beyond standard mobile development — I specialize in healthcare ecosystems, including: • Connected medical devices & wearables (BLE, IoT) • Real-time and near real-time health data processing • Apple Health / Google Fit integrations • HIPAA-aligned architectures & secure data handling • Remote patient monitoring & digital therapeutics apps Whether you're building an MVP or scaling an existing product, I help you choose the right architecture, avoid costly mistakes, and accelerate time to market. 𝙁𝙖𝙘𝙩𝙨 𝙖𝙗𝙤𝙪𝙩 𝙢𝙚 🏅 Built 100+ mobile applications across Flutter, iOS and Android 🚀 15+ years in mobile development including Flutter mobile development 🏆 Founded a technology company acquired by Microsoft 🌐 Developed developer tools acquired by AWS 🎯 Built products across Healthcare, IoT, Travel, Ecommerce and SaaS 💰 Helped startups launch profitable mobile products for iOS and Android 🔍 𝙃𝙤𝙬 𝙄 𝙃𝙚𝙡𝙥 𝙁𝙤𝙪𝙣𝙙𝙚𝙧𝙨 Whether you're building a startup MVP, SaaS platform, marketplace app or scaling an existing mobile development product for iOS and Android, I deliver production-ready Flutter mobile apps using modern mobile development architecture. 𝙈𝙮 𝙬𝙤𝙧𝙠𝙛𝙡𝙤𝙬 𝙛𝙤𝙘𝙪𝙨𝙚𝙨 𝙤𝙣: ✔ Fast MVP mobile development for startups ✔ Clean and scalable Flutter mobile development architecture ✔ Stable Flutter builds for iOS and Android ✔ High-performance UI and animations for Flutter mobile apps ✔ Long-term scalability in mobile development This approach helps companies reduce mobile development costs and launch faster across iOS and Android markets. 𝙎𝙝𝙤𝙧𝙩 𝙥𝙞𝙩𝙘𝙝 I'm a Senior Flutter Developer / iOS & Android Mobile App Developer with 15+ years of experience in mobile development. I design and scale mobile applications for iOS and Android using Flutter mobile development, Dart, Swift, Kotlin, Android development and iOS development combined with modern mobile architecture. Whether you need a Flutter developer, cross-platform mobile developer, startup MVP engineer, or mobile development expert for iOS and Android, I’ve got you covered. 𝙁𝙪𝙡𝙡 𝙡𝙞𝙨𝙩 𝙤𝙛 𝙢𝙮 𝙨𝙠𝙞𝙡𝙡𝙨 📱 Mobile Development: Flutter, Dart, Swift, SwiftUI, Objective-C, Kotlin, Java, Android, iOS 📲 Mobile Architecture: Flutter architecture, BLoC, Provider, Riverpod, Clean Architecture, MVVM 🖥 Web: TypeScript, JavaScript, React.js, Next.js 🔗 Backend & APIs: REST APIs, Firebase, GraphQL, WebSockets 🗄 Databases: SQLite, Firestore, MySQL, PostgreSQL ⚙ Tools: Git, CI/CD, Fastlane, TestFlight, Firebase With over a decade in mobile development, I also help with mobile product strategy, Flutter architecture consulting, AI integrations, backend infrastructure and full-stack development for mobile products. 𝙄𝙛 𝙮𝙤𝙪'𝙙 𝙡𝙞𝙠𝙚, 𝙛𝙚𝙚𝙡 𝙛𝙧𝙚𝙚 𝙩𝙤 𝙘𝙡𝙞𝙘𝙠 𝙩𝙝𝙚 𝙜𝙧𝙚𝙚𝙣 "𝙎𝙚𝙣𝙙 𝙖 𝙢𝙚𝙨𝙨𝙖𝙜𝙚" 𝙗𝙪𝙩𝙩𝙤𝙣 𝙖𝙣𝙙 𝙩𝙚𝙡𝙡 𝙢𝙚 𝙢𝙤𝙧𝙚 𝙖𝙗𝙤𝙪𝙩 𝙮𝙤𝙪𝙧 𝙢𝙤𝙗𝙞𝙡𝙚 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩🚀 Over the years I’ve delivered Flutter mobile development solutions for iOS and Android startups, SaaS platforms and enterprise mobile applications, helping companies scale mobile development products across Flutter, iOS and Android environments. Flutter developer focused on Flutter mobile development for iOS and Android applications. Experienced in building scalable Flutter mobile apps for iOS and Android using modern mobile development architecture. I design and deliver Flutter mobile development solutions for iOS and Android startups, SaaS products and enterprise platforms. My work combines Flutter mobile development, iOS development and Android development to deliver stable mobile applications with high performance across Flutter, iOS and Android. 7/04

Top Rated Plus | Full Stack .NET Developer | AI Automation Developer & AI Consultant | Azure & AWS | SaaS & E-Commerce I’m a Top Rated Plus Full Stack .NET Developer and AI Automation Developer with 10+ years of experience building scalable SaaS applications, AI-powered systems, and enterprise-grade web applications for global companies including P&G, BD, and HCL. I help businesses automate workflows, modernize legacy .NET systems, and build AI-enabled products using .NET / C# / ASP.NET / Azure / AWS / React / AI integrations. With 120+ successful projects, I’m typically brought in when performance, scalability, or automation really matters. ✔ Full Stack .NET Development: .NET / .NET Core / C# / ASP.NET / SQL Server / REST APIs / Microservices ✔ AI Automation & AI Integration: OpenAI / ChatGPT APIs / Workflow Automation / Intelligent Systems ✔ Cloud Development: Azure / AWS / Docker / CI/CD / Cloud Optimization ✔ SaaS Application Development: Scalable architecture / Multi-tenant systems / Secure APIs ✔ React / Angular / TypeScript / JavaScript ✔ Responsive UI / Performance Optimization / UX Improvements ✔ Shopify / WooCommerce / Custom E-Commerce Platforms ✔ Payment Gateways / ERP & CRM Integrations / Conversion Optimization I help companies move from “We want AI” to “This is the right AI solution for our business.” 🔹 AI opportunity identification & automation strategy 🔹 Technical feasibility & ROI analysis 🔹 Tool, model & architecture selection 🔹 MVPs, PoCs & production AI deployments 🔹 Scalable AI implementation roadmaps Once the strategy is clear, I build custom software and production-ready, scalable systems: ✅ Custom .NET web applications ✅ AI-powered features & integrations ✅ Automation pipelines that reduce manual work ✅ Secure APIs & third-party integrations ✅ Cloud-native systems built for scale Every solution is designed with performance, maintainability, and long-term growth in mind. Full Stack Developer, .NET Developer, ASP.NET Developer, C# Developer, Azure Developer, AWS Developer, AI Automation Developer, AI Consultant, SaaS Developer, Custom Software Development, API Integration, Microservices Architecture, Cloud Engineer, Shopify Developer, WooCommerce Developer, React Developer, Angular Developer, DevOps Engineer, CI/CD, Secure Web Applications, Enterprise Software Development