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✅ Result-driven .NET Developer delivering scalable web and cross-platform solutions. I help businesses build reliable applications using Blazor, and React for modern front-ends, ASP.NET Core for robust back-ends, and SQL Server/MySQL for safe and scalable data management. With solid experience in Clean Architecture, MVC, MVVM, and Vertical Slice, I ensure codebases are maintainable, scalable, and optimized for growth. 🚀 Highlights: * 8+ months as a dedicated full-stack developer for an e-commerce/ERP platform (Blazor SSR, ASP.NET Core, Odoo), owning deployments on Windows Server/IIS, resolving critical data-sync bugs between Shopify and Odoo, and hardening API security with rate limiting. * Built Lume, a .NET MAUI app integrating Machine Learning (ML.NET), REST APIs, and MySQL to deliver personalized movie recommendations. * 1 year of teaching experience in ASP.NET Core, React, Azure, and MySQL, strengthening communication and the ability to translate complex concepts into practical solutions. * Strong cloud expertise with Azure and proven knowledge in deploying secure, high-performance applications. 🔧 What I deliver: * End-to-end web and cross-platform development * API design & integration (REST) * Database design & optimization (SQL Server, MySQL, MongoDB) * Cloud deployment & scaling (Azure) * Windows Server / IIS deployment & scaling * Clean, tested, and maintainable code using industry best practices 💡 If you’re looking for a developer who combines technical expertise with a focus on delivering scalable, maintainable, and business-oriented solutions, let’s work together to bring your project to life. Core Skills: .NET | ASP.NET Core | Blazor | Entity Framework Core | Odoo | ERP | Ecommerce Integration | Shopify API Integration | React | .NET MAUI | Azure | Microsoft SQL Server | MySQL | MongoDB | Windows Server | IIS | Clean Architecture | MVC | MVVM | Vertical Slice Architecture | Git/GitHub

Throughout my career, I've worked on complex software projects where reliability, performance, maintainability, and clean architecture are critical. I specialize in designing robust backend systems with C# and .NET, while also working across frontend, databases, cloud infrastructure, and DevOps when the project requires full-stack ownership. What I deliver: - Build scalable REST APIs using C#, ASP.NET Core, and .NET 6/7/8 - Design enterprise applications using Clean Architecture, SOLID, CQRS, MediatR, and Repository patterns - Develop microservices and distributed backend systems - Build modern web applications using React.js, Angular, Blazor, TypeScript, and JavaScript - Design and optimize PostgreSQL, SQL Server, and Oracle databases - Improve application performance through query optimization, Redis caching, asynchronous processing, and efficient API design - Build background services, scheduled jobs, and workflow automation - Integrate third-party APIs, enterprise systems, payment platforms, and SaaS services - Containerize applications with Docker and support cloud deployments - Build CI/CD pipelines using GitHub Actions and modern DevOps practices - Write reliable automated tests using xUnit, NUnit, Moq, and integration testing frameworks - Debug production issues, perform root-cause analysis, and improve system stability Core technologies: C#, .NET, ASP.NET Core, Web API, Entity Framework Core, LINQ, SQL Server, PostgreSQL, Oracle, Redis, Docker, Azure, AWS, Microservices, REST APIs, CQRS, MediatR, Clean Architecture, React.js, Angular, Blazor, TypeScript, JavaScript, GitHub Actions, CI/CD, xUnit, NUnit, Playwright My approach is simple: understand the business problem first, design the right technical solution, and deliver clean, maintainable software that can continue to evolve as the business grows. Whether you need a senior .NET engineer to build a new application, modernize an existing system, integrate multiple services, optimize a slow backend, or resolve challenging production issues, I can take ownership from architecture through implementation and delivery.

+5 Years Experience Software Engineer, I specialize in .NET, AWS, React, and modern backend architecture, helping startups and enterprises build reliable systems that perform under real-world workloads. Some of the projects I've worked on include: • Built and maintained a medical imaging platform processing 500+ imaging studies every day, focused on performance, reliability, and continuous operation. • Designed and deployed cloud infrastructure on AWS, using ECS, EC2, RDS, Redis, S3, CloudFront, and Docker to support scalable production applications. • Developed high-performance ASP.NET Core APIs serving web and mobile applications with clean architecture and maintainable code. • Built modern frontends with React, creating responsive, user-friendly applications integrated with real-time backend services. • Optimized SQL Server and PostgreSQL databases through query tuning, indexing strategies, stored procedures, and performance analysis. • Developed real-time systems using WebSockets and Redis, supporting live communication and low-latency data synchronization. • Built cross-platform mobile applications with .NET MAUI, sharing business logic across Android and Windows. I use AI-assisted development with Claude Code and modern LLM workflows to accelerate delivery, improve code quality, and automate repetitive engineering tasks, without compromising maintainability. My core technologies include: • C# • ASP.NET Core • React • JavaScript • AWS • Docker • ECS • PostgreSQL • SQL Server • Redis • REST APIs • GitHub Actions Whether you need to build a new product, modernize an existing system, optimize performance, or scale your cloud infrastructure, I focus on delivering software that is reliable, maintainable, and ready for production from day one.

PROFESSIONAL SUMMARY Started programming at 14 and now specialized with the .NET ecosystem, web and mobile development. Always passionate about the concept of revolutionize the world with technology. Focused on code quality and design patterns and lately going for highly distributed systems. Enormous knowledge of SOLID principles, GoF and DDD.

🖥 Expert-Vetted Talent 📈 Top 1% — pre-screened Talent Managers and experts in their field. ⭐Senior .NET C# Software Engineer ⭐ Back-end development ⭐ Front-end development ⭐ Full-stack development ⭐ Umbraco Certified Master ⭐ nopCommerce Certified Developer ⭐ AI-Enhanced Development Leveraging 20+ years of software development expertise combined with cutting-edge AI tools, including Perplexity for rapid research, GitHub Copilot with Claude Sonnet 4.5 for intelligent code completion, and Claude Opus for complex problem-solving, I deliver production-ready solutions faster without compromising quality. This AI-augmented approach reduces development time by up to 40-55% while maintaining the architectural insight and code quality that only decades of experience can provide. 🤖AI-Assisted Development 🤖GitHub Copilot 🤖Claude AI Integration 🤖Rapid Prototyping 🤖Accelerated Delivery 🗟 Prompt Context Building Best practices and methodologies: 📢Scrum 📢SOLID principles 📢DRY – don't repeat yourself 📢YAGNI – you ain't gonna need it 📢Code Coverage (Unit Testing) 📢Version Control Standards (branches, pull requests, etc.) ‼️ Certifications ‼️ ️🥇 Scrum Developer Certified ️🥇 Scrum Master Certified ️🥇 Scrum Product Owner Certified ️🥇 Umbraco Certified Master ️🥇 nopCommerce Certified Developer Let me know if you have any questions! 🎆

Top Rated Full-Stack Engineer (.NET / Angular / React) — 10+ years, microservices, legacy rescue, AI-augmented delivery I’m Daniel, a Top Rated Upwork developer (100% Job Success) with a decade building enterprise systems for U.S. and UK clients and a Computer Science degree. I specialize in the parts most freelancers avoid: brownfield .NET codebases, microservices at scale, and shipping fast under legacy constraints. What I do best: Backend (.NET / C#) - ASP.NET Core 6–8, .NET Framework 4.7, WebForms, VB.NET, REST APIs, CQRS, MassTransit, Entity Framework Core, RabbitMQ, AWS (SQS/SNS/S3/Lambda), Azure (Service Bus, Storage Queues, Blob) Databases - SQL Server, MySQL, PostgreSQL Architecture - microservices (20+ services at handoff in my last enterprise role), event-driven systems, Docker, JWT auth Recent Upwork wins: 5.0★ legacy rescue, U.S. logistics client (229 hrs, $4.8K) — sole .NET developer on a WinForms VB.NET / MySQL app for ships, containers, parts, sales. Shipped features end-to-end and fixed bugs other devs had bounced off. Built AI coding agents into my workflow and tuned them for legacy VB.NET — throughput went from ~1 feature/day to 3+/day; refactors that used to take a day dropped to ~1 hour. 5.0★ microservice update — delivered on a fixed-price microservice + Angular update with the reviewer calling me “an absolute wizard.” Ongoing solo build (UK client) — full-stack PowerPoint-generation microservices app: React 18 frontend, .NET 6 API (C#, EF Core, PostgreSQL, Docker, JWT). I run it end-to-end. What makes me different Most engineers treat legacy code as something to escape. I treat it as the job. I’m also an AI-assisted developer. I work daily with Pi Coding Harness and Claude Code and have built custom extensions to make LLMs work better with legacy databases. Languages: Portuguese (native), English (C2), Spanish (fluent). Let’s talk about what you’re trying to ship.