Harold – .NET Core, React, Data Science

It's a responsive web app for a fintech company to manage loans, calculate risks and get all customer data by simulating installments.

• Lead the team;
• Develop Frontend application with React JS and API Rest services using Django Rest Framework;
• Built the main service to manage the loans in .Net Core and SQL Server;
• Develop a prototype of the machine learning model to calculate the risk of the current loans to predict the defaults with Python, Pandas, NumPy, Scikit-Learn, and TensorFlow using supervised and unsupervised algorithms;
• Develop reports with large amounts of data and make the visualization in PowerBI and Qlik Sense using SQL Server and MongoDB;
• Design the architecture with distributed systems using Bus Services, App Services, and Functions in Azure;
• Write the unit tests.

Financial application for the stock market (Pre-IPO companies). This web application is made in C#, Net core in the backend and the front-end uses Razor pages, using Serverless, Bus Services, Azure Functions, SSO, and Active Directory on Azure.

• Converted an old app with monolithic architecture to services architecture and mobile version with a new responsive web app;
• Built financial and investment apps with high-security standards using SSO, Federated, SAML, and Active Directory;
• Designed the architecture using Microsoft technology stack;
• Collected and documented user requirements and developed logical and physical specifications;
• Developed training manuals for users.

It is an audit application used to calculate the value of an investment using all the information available worldwide with many data sources. Developed the React front end and data processing with .NET Core. Azure tools used in this project: CosmoDB, Azure Data Lake, Azure Databricks, CI/CD DevOps, Active Directory, SSO, Azure Functions (Python code), and Serverless API with multiple instances configured.

• Processed data for ETL apps with Python and .Net Core;
• Worked with Microsoft Azure with Databricks and Azure Data Lake and all the CI/CD processes;
• Developed back-end in the ETL Team in C#, Python, Databricks, and Spark;
• Built front-end in React for the ETL user app;
• Developed the machine learning code to filter the data from the sources and get the most valuable data;
• Developed ETL applications: Extract-Transform and Load with Python, Numpy and Pandas. Experienced with Azure with Databricks and Azure Data Lake and all the CI / CD processes;
• Designed and improved the architecture of the new features;
• Maintained big data in Azure Data Lake, MongoDB, and SQL Server;
• Developed a prototype of an Xamarin App for internal use of the auditors to get the state of the ongoing projects.
• Managed Azure DevOps CI/CD.

It is a financial and accounting application for managing loans and credit risk. This is a set of web applications for PC and mobile. He worked in both mobile and web applications with React, .Net Core, and Xamarin. Likewise, he made several Restful API services and machine learning code with Python.

• Developed back-end services and API in .Net Core, Python, and Django Rest using SQL Server and MongoDB;
• Built front-end in React, Bootstrap, and Tailwind;
• Develop and maintain the mobile applications for the Wallet and Payment Gateway in Xamarin.
• Developed data analytics apps with AI;
• Built and managed dashboards in PowerBI, IBM Cognos, and Qlik Sense;
• Led tech team in software development projects.