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Lead Software Engineer | San Ramón, Costa Rica

Guerth is a senior software engineer over 18 years of experience with the lead design, development and implementation of high-performance software solutions to match business in the financial, export, and medical industries. He believes he would bring an extremely valuable skill set to this project, along with his results driven focus and good communication skills. The last 10 years he has specialized in Microsoft technologies like .Net and .Net Core, SQL Server and others. He is passionate about the progression of the software engineering industry and its focus on best practice.



  • SQL Server
  • Team Foundation Server (TFS)
  • .net core
  • JavaScript
  • Cascading Style Sheets (CSS)
  • XML
  • C#
  • jQuery UI
  • jQuery
  • Web Services
  • SSRS
  • RESTful WebServices
  • Microsoft Dynamics CRM
  • HTML5
  • .NET
  • Databases
  • Visual Studio
  • Entity Framework
  • MySQL
  • HTML
  • MVC
  • Microsoft SQL Server
  • WCF
  • Software Development
  • Scrum
  • SQL
  • Git


Bioclinica – November 2016 – Present
Position: Senior Software Developer
Description: Responsibilities include the maintaining, fixing bugs and developing of new enhancements to ClinViz, ClinFeed and ClinPlan projects that manage contracts of medical studies and is developed with .Net application. Also help coworkers with the rest of applications.

Technologies: Sql Server 2012 and 2014 , Entityframework 6.0, Webforms, ASPX, C#, WCF, RESTFul services, jQuery, jQuery UI, Application fabric cache, Angular, TFS, Git, Docker containers,.Net Framework 4.5, .Net Core 1.1, .Net Core 2.0, Micro services, EntityFramework coreAzure and other new technologies.

C.R. England – December 2015 – September 2016
Position: Senior Software Engineer
Description: As a Senior Software Engineer, are divide in three stages as the project. The first stage of the project: performed maintenance, fixing bugs a new enhancements on the Powerbuilder applications, and had to take architectural decisions if these enhancements are going to be applied on the applications or moved to the new .Net application. Helped coworkers with the rest of applications all developed with C# and visual basic, besides to review, fix and create new unit tests running locally and into the build server. Used multiple technologies like Powerbuilder, Sql Server, Entityframework, ASPX, C#, WCF, RESTFul services, jQuery, jQuery UI and so on.

Intertec International– May 2015 – November 2015
Position: Software Engineer
Description: Worked a new terminal file scanning application to manage the stored files into our client's pc. This solution was started from beginning with vs2013 and framework 4.5, application block as database manager, t4 as templates for business objects, linq, lambda expressions sql 2008nd. Also this application has a Web admin portal made with Microsoft MVC5 html helpers, RESTful api jQuery and the highest web technologies.

Fiserv – May 2012 – April 2015
Position: Senior Software Engineer
Description: Worked on creating a new winform application to manage test automation with vs2013 and framework 4.5, entity framework, linq, lambda expressions sql 2008nd TFS as test cases engine, and also with Microsoft Dynamics CRM developing plugins, integration with external applications, reports and UI Forms, responsible to create new business functionality. Also worked on developing WCF services that provide an extension to external applications to allow intercommunication between Dynamics CRM and any other external application, it was developed using Visual Studio 2010 (C# and framework 4.0), Dynamics CRM SDk, Javascript, jquery, HTML5 and other Microsoft Dynamics Development tools

EX2 Outcoding – August 2011 – April 2012
Position: C# Developer Senior
Description: Worked on the maintenance of several Web applications: NewHomeSource which was developed using ASP.NET 4.0 and C# as well as MVC Razor, jquery and entity framework, NewHomeSourcePro was developed. using .NET Framework 3.5 and C#. It is a project that uses webforms and ADO.NET as connections to the database, eflyer developed with .NET Framework 2.0 using VB and ADO webforms as a database connection. In addition, worked on a console application (a scheduled task) that uses the Responsys API to send email campaigns. It was developed with .NET Framework 4.0, C# and ADO.NET as connection to the database.

Instituto Nacional de Seguros– January 2010 – July 2011
Position: Software Engineer
Description: Worked in the IT Department at INS, in the security area, specifically in secure programming. Wrote policies and safe programming manuals, based on good programming practices specifically in C#. Developed the authentication module using smart card and the System.Security.Cryptography libraries, COM components (ActiveX) and JavaScript, for web applications. Developed a web application that allows management of the area resources. Also developed a web interface that lets users manage AS400 systems. Both applications were developed in VS2008 with ASPX and C # as code behind language, and SQL Server 2008 as database engine, and used reporting services for the presentation layer (charts and reports). Also developed a WCF service library which allowed integrated authentication through Active Directory identity and role-based authentication (AzMan) developed also with VS2008 using C # and communicating through TCP protocol. Acted as virtualization infrastructure architect, which is intended to design and implement a new virtualization infrastructure on Microsoft Hyper-V and SCVMM 2008.

Independent works– October 2005 – January 2010
Position: C# Developer and consulting
Description: Worked independently, providing advice on maintenance and improvement of networks, systems development, designing and hosting webpages. Specialized in creating applications on the Microsoft .net platform. Worked as a consultant on an ERP for a hardware store that has several locations around the country and several wineries. The design was built for centralizing all the management and administration, using reporting services to provide web-based printable reports and the POS designed to work with Windows Form, which interact with a collection of WebServices for information exchange between the centralized data bases and POS terminals, those applications were developed in VS2008 (ASPX and win forms) C# as base language, and SQL Server 2008 as database engine. Used reporting services for the presentation layer (charts and reports). Developed a WCF service library which allowed integrated authentication for the web and win forms applications.

Corporación Agroindustrisl Peters– April 2003 – September 2005
Position: C# Developer and consulting
Description: Responsible for maintaining accounting systems, banks and assets (developed in Delphi 3 and Sybase), performing the analysis and design of the new system for the enterprise (integrating the three previous systems), using MySQL and Delphi 7. Developed small applications for specific enterprise applications, in addition to undertaking the maintenance of database server (Sybase Adaptive Server). In addition to carrying out the restructuring and maintenance of the network, installed the internet service dedicated ICE and a mail server (Debian GNU Linux 3.0, Exim. Ipop3, SSL, Webmail and Usermail).

Informática especializada NASAJ– August 2000 – March 2003
Position: Programmer
Description: Participated in the SCAD system maintenance, performance, and development of new features like a human resource module. Developed some little applications for the companies’ customers, and provided technical support to customers not only on site but also by telephone.

Technologies: Microsoft Visual C++, Visual Basic 6.0 and Delphi 6, Ado technology, SQL-Server Express 2000, MS Access 97 – 2000, My Sql Server 3.2


Universidad Fidelitas (2010 – 2012)
Bachelor's degree, Systems Engineering.

Instituto Tecnológico de Costa Rica (1997– 2003)
Last semester Bachelor's degree, Systems Engineering.

-Programming in HTML5 with javascript and CSS3 


Services payment integrated system October 2011 – September  2012
The main system function is to make payments of public and private services such as telephone services, electricity and agreements with other utilities such as cable, internet and others.

Crhonos ERP  October 2005 – January 2010
It is a POS/ERP system designed to work with Windows Form, which interact with a collection of WebServices for information exchange between the centralized data bases and POS terminals.