Freddy GuerreroFull Stack Developer
A dedicated and experienced software engineer with over a decade of expertise in software development, particularly in the healthcare, health insurance, banking, and telecommunications sectors. Proficient in the .NET stack with a strong foundation in building complex applications and experience with AWS and Azure cloud services. Adept at full lifecycle software development, from requirements gathering to implementation and support. I deliver robust, scalable solutions, optimize system performance, and collaborate with cross-functional teams to achieve project goals. I seek to leverage my technical skills and experience in a dynamic development environment.
Certifications
C#
C#
12/14/2022
Tech stack
C#
C#.NET (15)
Azure (13)
Microsoft SQL Server (12)
SQL Server Reporting Services (SSRS) (12)
Angular (12)
ASP.NET MVC (11)
JavaScript (9)
Oracle Database (9)
jQuery (9)
Java (9)
Entity Framework (5)
ASP.NET (5)
LINQ (4)
Visual Basic .NET (VB.NET) (4)
WinForms (4)
TFS Build & Release Management (4)
AWS Cloud Architecture (3)
CQRS (3)
GitHub (3)
PostgreSQL (3)
SQL Server Integration Services (SSIS) (2)
Crystal Reports (2)
Azure SQL Databases (2)
WCF Web Services (2)
Git (1)
Docker (1)
REST APIs
Experience
.NET Engineer2am.tech
10/2022 - Currently

- Developed from scratch and maintained the backend for a high-scale EMS application using the .NET 6 stack with C# applying the Clean Architecture. - Applied CQRS and MediatR patterns for clear separation of concerns and improved command and queries handling. - ImplementedFluent Validation for model validation and Polly for resilience policies such as retries with exponential backoff policies. - Implemented SignalR for real-time communication between server and clients with a Redis backplane for a distributed environment. - Integrated OpenTelemetry to ensure observability and traceability across distributed systems. - Implemented AWS cloud solutions, including SQS, S3, Lambda, and Secrets Manager. - Worked with PostgreSQL as the main relational database, using Entity Framework for efficient database interactions. - Conducted code reviews to ensure compliance with the project coding guidelines and best practices.

GitHub
Angular
Azure
PostgreSQL
AWS Cloud Architecture
CQRS
LINQ
Entity Framework
ASP.NET
C#.NET
Tech Lead ManagerBHD BANK
05/2022 - 10/2022

- Led a cross-functional development team to deliver some critical projects, including the implementation of mobile check deposit functionality within the bank's mobile app, and the creation of a payment system leveraging payment links and QR codes for streamlined, user-friendly transactions. - Designed the architecture for new solutions, providing technical guidance and hands-on support to the development team using the .NET stack and Azure cloud services. - Helped with code reviews to ensure compliance with the company coding guidelines and best practices.

LINQ
Docker
Git
JavaScript
Azure
Oracle Database
Microsoft SQL Server
ASP.NET MVC
ASP.NET
C#.NET
Senior Software EngineerBupa Global Latinoamérica
02/2021 - 04/2022

- Maintained and designed new features for a large-scale application's core insurance system solutions, focusing on backend APIs and frontend desktop applications using Windows Forms and DevExpress controls. - Designed and generated reports using SSRS (SQL Server Reporting Services) to deliver insights and business intelligence. - Developed the core software for a new travel insurance product, ensuring seamless functionality for the business. - Developed an insurance premium payment module tailored to the needs of Latin American countries, including the Dominican Republic, Ecuador, Guatemala, Panama, and Bolivia, streamlining payment processes. - Led the core integration for Bupa medical insurance implementation in Peru, ensuring smooth cross-border operations and compliance. - Collaborated with the incidents team to review prioritized bugs and investigate root causes for existing issues, ensuring timely resolution and improved system reliability.

C#.NET
ASP.NET
Microsoft SQL Server
Azure SQL Databases
SQL Server Reporting Services (SSRS)
Azure
WinForms
Visual Basic .NET (VB.NET)
WCF Web Services
TFS Build & Release Management
Senior Software EngineerCLARO DR
11/2012 - 02/2021

- Developed some complex web systems from scratch according to the business requirements using the ASP.NET Stack with WebForms, MVC, Razor, and Angular. - Developed backend API to implement the 911 NENA I3 standard API to automate caller data collection for emergency services using Java + Spring for the APIs. - Integrated GSMA global database synchronization with the .NET stack to prevent the activation of stolen phones internationally, enhancing security measures. - Actively involved in all stages of the development cycle, from information gathering and solution design to development and implementation, ensuring smooth internal project execution. - Led the HLR system migration to implement VoLTE and VoWIFI services, preparing the infrastructure for the 5G network. - Collaborated with the incidents team to review prioritized bugs and investigate root causes for existing issues, ensuring timely resolution and improved system reliability.

Angular
C#.NET
ASP.NET MVC
jQuery
JavaScript
Microsoft SQL Server
Oracle Database
SQL Server Reporting Services (SSRS)
Java
Azure
.NET Software DeveloperOfimatic
10/2010 - 10/2012

- Developed and maintained custom web and desktop software solutions using the .NET Stack for delivering client-specific systems. - Designed and managed IVR (Interactive Voice Response) systems for multiple clients, including Innova Monaco, Vimenca Bank, CardNet, and Edeeste, optimizing customer service automation and improving user experience. - Developed the INTEC Payments Web Portal for streamlined online payment processing. - Created an administrative module for VOCOM, a compulsive collection management system, improving operational efficiency.

C#.NET
ASP.NET MVC
WinForms
SQL Server Reporting Services (SSRS)
SQL Server Integration Services (SSIS)
Crystal Reports
Microsoft SQL Server
TFS Build & Release Management
Entity Framework
Visual Basic .NET (VB.NET)
Education
Specialization Of Senior Business ManagementAPEC UNIVERSITY
03/2019 - 08/2019
Master of Management and ProductivityAPEC UNIVERSITY
10/2016 - 02/2019
Bachelor's Degree in Systems EngineerO&M UNIVERSITY
05/2010 - 10/2015