David Daniel Fuentez Hernandez

I’m a Computer Science Engineer with experience in banking systems development and integration, specialized in Oracle PL/SQL, .NET, and RESTful APIs. I’ve supported core banking platforms by building backend services and APIs, with a focus on reliable production behavior and performance.

In my current role as a Back-End Developer, I develop and integrate banking systems using Oracle PL/SQL, C#, and .NET. I write queries, optimize database performance, and work with authentication while handling errors in production systems.

Previously, I worked as a Full Stack Engineer designing, developing, and deploying applications with Node.js/NestJS and JavaScript/TypeScript (React), and Java with .NET/C# (ASP.NET Core). I specialized in microservice architectures, REST APIs, relational databases, and NoSQL, applying SOLID principles, Clean Architecture, automated testing, and Agile practices to improve quality and reduce errors.

I also bring an analytics background as a Financial Data Analyst, where I developed ETL pipelines and interactive dashboards for income/expense reports and project-level financial analysis. I digitized financial and operational records and automated reporting processes using Python and Power BI, translating data into actionable insights for budgeting and strategic decision-making.