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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: production .NET codebases others leave behind, 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.

I am a Full Stack developer with years of experience delivering desktop applications using WPF, as well as web applications. My main focus is on the C# language and the .NET environment, but I also have experience with Angular and React. 💻 Core Skills: Backend: C#, .NET Framework, .NET Core, ASP.NET Web API Frontend: Angular, React, JavaScript, TypeScript Database: SQL Server, SQLite, MongoDB Architecture: Clean Architecture, Unit of Work, Repository Pattern, DDD Tools: Git, Azure DevOps, REST APIs, Swagger, Entity Framework, Docker 🚀 What I can do for you: - Fix bugs and improve performance in existing .NET applications - Create clean and secure REST APIs - Refactor legacy codebases for better maintainability - Optimize SQL queries and improve database performance - Develop full-stack web applications (frontend + backend) - Integrate third-party APIs and services 🧠 Why work with me? I prioritize clean, maintainable code and clear communication. I deliver on time and always prioritize quality. Whether it's fixing critical bugs or developing a complete application, I'm here to help. 📩 Let's talk! I'm ready to collaborate and add value to your project.

✨𝟏𝟎𝟎 % 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 | ✨18+ 𝐲𝐞𝐚𝐫𝐬 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 | ✨ 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐏𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 18 Years of Engineering Excellence | AI-Augmented .NET Developer I bridge the gap between deep-rooted architectural stability and the future of high-velocity development. With nearly two decades of experience across Direct Sales, EdTech, and enterprise sectors, I specialize in building scalable, mission-critical systems using the .NET ecosystem and Azure/AWS cloud. I am a firm believer that the future of software belongs to the "AI-Augmented Developer." By deeply integrating GitHub Copilot and AI-driven workflows into my daily practice, I’ve accelerated the development lifecycle—drastically reducing boilerplate time, enhancing unit test coverage, and rapidly prototyping complex C# architectures without sacrificing the SOLID principles I’ve mastered over 18 years. What I bring to your team: - AI-Powered Velocity: Leveraging GitHub Copilot for faster refactoring, documentation, and TDD. - Architectural Rigor: Deep expertise in DDD, CQRS, and Microservices to ensure systems aren't just fast, but resilient. - Full-Cloud Mastery: Designing and deploying scalable environments across Azure or AWS. 🛠 Technical Ecosystem - Core & Backend: .NET 8, C#, ASP.NET Core, Web API, GraphQL, Microservices, SQL Server. - AI & Efficiency: GitHub Copilot (Advanced Prompt Engineering), GitHub Actions (CI/CD). - Cloud & DevOps: Azure (App Services, Service Bus), AWS (Lambda, ECS, SQS, CDK), Docker, Kubernetes. - Architecture: SOLID, DDD, CQRS, Event-Driven Systems, Unit Testing (Jest/xUnit). - Frontend & Modern Web: React, TypeScript, Node.js, WebSockets. - Legacy Modernization: Expert at transitioning WebForms/WSDL systems into modern REST/Cloud-native architectures. Why Work With Me? I don’t just write code; I solve business problems. Whether it’s consulting on a new startup or optimizing a legacy SQL environment, I focus on maintainable, elegant solutions that align with your bottom line.

✅ Available Now ✅ 100% Job Success ✅ Full Stack .Net Development Expert ✅ 8+ years of experience in the industry Greetings! I'm Gabriel de Souza, a highly skilled and enthusiastic software developer with over 8+ years of hands-on expertise in C# | ASP.NET MVC | ASP.NET CORE MVC | .NET Core | Angular | SQL My resume speaks volumes about my commitment to delivering high-quality solutions tailored to meet client needs. Skilled in both front-end and back-end development, I specialize in Angular, .NET Core, ASP.NET MVC, Entity Framework Core, and more. Proficient in database management with MS SQL and MySQL, with a strong command of version control systems like Git and TFS. Familiarity with Azure DevOps Services adds a layer of efficiency to project workflows, ensuring seamless collaboration and delivery. Key Skills: 🖥️ Front-end: Angular, JavaScript, Typescript, JQuery 🛠️ Back-end: .Net Core, ASP.NET MVC, Entity Framework Core, C#, VB.NET 🗃️ Database: MS SQL, MySQL 📁 VCS: Git, TFS 🔧 Testing: NUnit, xUnit, MSTest ⚙️ DevOps: Azure DevOps 🛠️ Design Patterns: MVC, MVVM, Dependency Injection 🔒 Security: Authentication, Authorization, JWT 🔄 Agile Methodologies: Scrum, Kanban 💻 IDE: Visual Studio, Visual Studio Code ✔️ 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲: I am open and available to embark on new projects and collaborations. My schedule offers flexibility, enabling me to adapt to different time zones and project demands. Let's engage in a conversation about your unique requirements, and together, we can find a mutually beneficial arrangement to commence our collaboration. Looking forward to connecting and bringing your vision to life! 🚀 Ready to Team Up: Your vision deserves to shine, and I'm here to make it happen! Whether it's crafting a dynamic web application, developing APIs, or enhancing your front-end experience with Angular, count me in to be your partner in success. Let's dive into a conversation about how my expertise and background can elevate your project. Drop me a line, and let's embark on this journey to create something truly remarkable together!