Gabriel Villacis Email & Phone Number

Araucanía Region, Chile

Villarrica, Araucanía Region, Chile

• I provided significant value by supporting the understanding and execution of technical tasks that required evaluation and refinement, making an important contribution to the Tech Lead in the daily management of tasks.• I took on activities to support the Tech Lead in meetings and technical decision-making, while also focusing on software development.• I shared technical knowledge with developers and supported them through pairing to resolve technical doubts or complex developments. I helped new team members during their onboarding, adding value with my technical experience.• I focused on observability to improve the resilience and reliability of the products.• I led a team to evaluate five key improvement areas for a retail client, including Testing, Observability, Architecture, CI/CD, and Technical Debt. We divided the research according to our specializations, and I contributed primarily to the pillars of Technical Debt and Observability.• We only had three months to complete interviews, surveys, analyses, evaluations, updates, and the final report, achieving a positive outcome for the client despite the limited time.• We identified improvement areas within product teams and enabling teams to support them. We became an enabling team responsible for delivering value through Observability, establishing standards and best practices to create more reliable and scalable products.

Santiago, Santiago Metropolitan Region, Chile

• I worked for multiple clients across various industries such as Retail, Insurance, and Airlines, both in backend and frontend development. Backend development is my strong suit due to my passion for understanding how to model and apply logic to diverse business contexts.• I developed and improved products using various testing and security techniques, adding reliability and good performance to these products.• For an airline client, I introduced a distributed caching solution for REST APIs calling a Global Distribution System (GDS) since the existing in-memory cache did not solve the problem of storing idempotent responses across application instances. Additionally, I solved an issue that each time the cache needed to be refreshed, the application had to be redeployed.• Within this airline client, I helped resolve many issues we had with the GDS using my consulting skills to understand why these problems were occurring and solve them. Additionally, I assisted in understanding what was necessary to have from the GDS and what domain model was required to implement functionalities in the Checkout and Boarding Pass application.• I improved my English listening and speaking skills by accepting the challenge of working with English-speaking teams.• I helped many new team members understand the business and the team's ways of working, adding value with my technical experience.• Whenever I had available time, I supported the recruitment area by conducting technical interviews for hiring new personnel.

Santiago, Santiago Metropolitan Region, Chile

• I led a team with the challenge of migrating the Easy.cl website, developed in-house, to the IBM Commerce platform. I utilized many existing analyses from the legacy application, where we had to strangle those functionalities and migrate them to the new application.• As part of this project, we were assigned IBM Commerce classes to understand how the application handled order assignments, as the Distribution Center (DC) and the Warehouse Management System (WMS) were not prepared for the way they were assigned.• I was responsible for providing business context to the team and assisting with any technical questions that arose during the migration.• I developed web components for the new face of the legacy application before the migration. I analyzed and designed the mobile version of the same legacy application.• I guided the development of an order report manager. I was also responsible for identifying and fixing bugs in the legacy application and adding unit tests to maintain the reliability of the components.

Santiago, Santiago Metropolitan Region, Chile

• The client purchased my services to work directly with them. The feedback I received was very positive, which is why I was assigned to work full-time on their Easy.cl website. • When more people joined the team, I was responsible for providing business context to the team and assisting with any technical questions that arose during the requirements gathering process.• I identified multiple security vulnerabilities, including SQL injection flaws and database deadlocks, in the legacy application. I resolved these issues through field validation, prepared statements, and transactions, respectively. I fixed everything within one month, as I was the only person with the technical knowledge and depth working at that time.

Santiago Province, Chile

• Dev Practices: OOP, Design Patterns, Refactoring, MVC, ORM.• Operating System: Linux.• Technologies: Shell, Maven, Java 6, Spring Framework, Hibernate, HTML, CSS, jQuery.• Servers: IBM WebSphere Application Server, IBM DB2.• Methologies: Scrum.

Santiago Province, Chile

• Client: Cencosud, Retail.• Dev Practices: OOP, Design Patterns, UML, Refactoring, MVC, SOA.• Operating System: Linux.• Technologies: Shell, PL/SQL, Maven, Java 6, Spring Framework, JDBC, JAXB, Jackson, Tiles, HTML, CSS, 960 GS, jQuery.• Servers: IBM WebSphere Application Server, Oracle DB, Jetty.• Testing: JUnit.• Period: 2011/12 - 2012/09• Client: Entel, Telecom.• Dev Practices: OOP, Design Patterns, UML, Refactoring, MVC, SOA, Message Queues.• Operating System: Linux.• Technologies: Shell, Perl, C, pro*C, PL/SQL, Maven, Java 5, Spring Framework, JDCB, WebSphere MQ, Struts, HTML, CSS, jQuery.• Platforms: Oracle Service Bus, Control-M.• Servers: Oracle Weblogic, Oracle DB, Jetty.

Santiago Province, Chile

• Client: Citigroup, Banking.• Dev Practices: OOP, Design Patterns, UML, Refactoring, MVP, ORM, Message Queues.• Operating System: Windows.• Technologies: PL/SQL, Ant, Ivy, Java 5, Spring Framework, Hibernate, JMS, GWT, CSS.• Servers: Oracle Weblogic, Oracle DB, Jetty.• Methodologies: Scrum.

Santiago Province, Chile

• Client: Penta Security, General Insurances.• Dev Practices: OOP, UML, MVC, SOA, ORM.• Operating System: Linux.• Technologies: SQL, Java 5, Spring Framework, Hibernate, Quartz, Jasper Reports, Apache CXF, Axis2, Struts 2, HTML, CSS, jQuery.• Servers: IBM WebSphere Application Server, IBM WebSphere Portles Server, SyBase.• Period: 2008/02 - 2008/03• Client: MTS, Hardware Stores.• Dev Practices: OOP, SOA.• Operating System: Linux.• Technologies: Java 5, Axis2.• Platforms: SAP.• Servers: Apache Tomcat.• Period: 2007/12 - 2008/02• Client: Colmena Golden Cross, Health Insurance.• Dev Practices: OOP, MVC.• Operating System: Linux.• Technologies: SQL, Java 4, JDBC, Struts 1, HTML, CSS, Dojo.• Servers: JBoss Application Server, Oracle DB.• Period: 2007/01 - 2007/12• Client: Presto, Retail.• Dev Practices: OOP, MVC, MVP.• Operating System: Windows.• Technologies: SQL, Java 4, JDBC, jPOS, Struts 1, HTML, CSS, GWT, YUI.• Servers: IBM WebSphere Application Server, Oracle DB.• Period: 2006/05 - 2007/01• Client: Banco de Chile, Banking.• Dev Practices: MVC.• Operating System: Windows.• Technologies: SQL, Java 4, JDBC, Struts 1, DWR, HTML, CSS.

Santiago Province, Chile

• Client: Altec Santander, Banking.• Dev Practices: MVC, ORM.• Operating System: Windows.• Technologies: SQL, Java 4, SWT, Spring Framework, Hibernate, Servlets, HTML, CSS.