Elder Crisóstomo

Senior Software Developer at Envrmnt by Verizon
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Contact Information
us****@****om
(386) 825-5501
Location
Miami, Florida, United States, US
Languages
  • English Native or bilingual proficiency
  • Spanish Native or bilingual proficiency

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5.0

/5.0
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Nate Barbettini

Elder is not only a fantastic engineer, he's a great guy. He consistently produces high-quality code with minimal oversight and little drama. He's easy to work with and doesn't bring an ego to the table. I'm thankful I had the opportunity to work with him. I wouldn't hesitate to recommend him as both a great engineer and a great person to know.

Alex Salazar

I recommend Elder and absolutely work with him again. He joined Stormpath when we were a five people in a tiny, run-down office and he stayed with us until we were 10x the size and acquired by Okta. From the moment he joined us to the moment he left, Elder was committed to the company, our mission, and our customers. He always did what we asked and worked hard to deliver quality in his work. Moreover, Elder is a low-drama engineer. He does what's asked, doesn't have an ego, gets along with everyone, and is just generally easy to work with. Elder rocks. I hope you get the opportunity to work with him as long as I did.

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Credentials

  • Sun Certified Programmer for the Java 2 Platform 1.4 (SCJP 1.4)
    Sun Microsystems (now Oracle)
  • Sun Certified Web Component Developer for the Java Platform, Enterprise Edition 5 (SCWCD 1.5)
    Sun Microsystems (now Oracle)

Experience

    • United States
    • Software Development
    • 1 - 100 Employee
    • Senior Software Developer
      • Apr 2018 - Apr 2021

    • United States
    • Mobile Computing Software Products
    • 1 - 100 Employee
    • Director Of Information Technology
      • Aug 2017 - Oct 2018

      Member of a team that builds a product to help small corner stores and their clients better connect with each other. Responsible for the architecture and implementation of a distributed system built on top of cloud services such as AWS ECS, AWS DynamoDB, AWS Elasticsearch, AWS API Gateway, among others. Responsible for directing a team of graphic designer, front end engineers and backend engineers, and their coordination. Member of a team that builds a product to help small corner stores and their clients better connect with each other. Responsible for the architecture and implementation of a distributed system built on top of cloud services such as AWS ECS, AWS DynamoDB, AWS Elasticsearch, AWS API Gateway, among others. Responsible for directing a team of graphic designer, front end engineers and backend engineers, and their coordination.

    • United States
    • Technology, Information and Internet
    • 1 - 100 Employee
    • Senior Software Engineer
      • Jul 2012 - Mar 2017

      Member of a committed team that built a high-performance multi-tenant API service that reduces the cost and effort of implementing secure and reliable user management and authentication. Maintenance and new complex implementations of the company’s core application, interacting with technologies such as MySQL, Hibernate, Cassandra, Elastic Search, Samza, Zookeeper, Kafka; Design, implementation and maintenance of several REST+JSON API endpoints; Design, implementation and… Show more Member of a committed team that built a high-performance multi-tenant API service that reduces the cost and effort of implementing secure and reliable user management and authentication. Maintenance and new complex implementations of the company’s core application, interacting with technologies such as MySQL, Hibernate, Cassandra, Elastic Search, Samza, Zookeeper, Kafka; Design, implementation and maintenance of several REST+JSON API endpoints; Design, implementation and maintenance of several micro services using the Spring Boot framework; Designed and implemented first versions of Stormpath's Ruby, Python and PHP SDKs and collaborated with the Java SDK; Consistent usage of design patterns such as Visitor, Request Object, Factory, Singleton; Coordination of core application and SDKs releases; Code reviews for core application and SDKs; Custom JMeter Spring Boot application to measure and validate API benchmarks; Utilized Kanban Agile methodologies; Contribution to open source libraries, such as Greenmail and Stormpath SDKs; Designs and implementations responsible for achieving: The core search feature of the REST+JSON API. Implementation of the custom data search feature and micro services infrastructure. Several critical bug fixes in a timely manner. UI console 100% REST+JSON API based. Faster REST API response by optimizing MySQL database and queries, and by making source code more efficient. Sample applications for external/internal users that helped them understand how the product works so they have a better and faster on boarding process. Faster artifacts builds by parallelizing integration tests with TestNG and Maven failsafe plugin. Environment: MacOS Yosemite/El Capitan/Sierra, Linux, Apache Tomcat, Virtual Box, Maven, Docker, MySQL Server, Spring Framework, Spring Boot Framework, Git, IntelliJ IDE, Postman, Curl, Httpie, Atlassian's Jira/Confluence/Bitbucket/Hipchat, Slack, New Relic, AWS Lambda/Kinesis, Github, Travis, Teamcity. Show less Member of a committed team that built a high-performance multi-tenant API service that reduces the cost and effort of implementing secure and reliable user management and authentication. Maintenance and new complex implementations of the company’s core application, interacting with technologies such as MySQL, Hibernate, Cassandra, Elastic Search, Samza, Zookeeper, Kafka; Design, implementation and maintenance of several REST+JSON API endpoints; Design, implementation and… Show more Member of a committed team that built a high-performance multi-tenant API service that reduces the cost and effort of implementing secure and reliable user management and authentication. Maintenance and new complex implementations of the company’s core application, interacting with technologies such as MySQL, Hibernate, Cassandra, Elastic Search, Samza, Zookeeper, Kafka; Design, implementation and maintenance of several REST+JSON API endpoints; Design, implementation and maintenance of several micro services using the Spring Boot framework; Designed and implemented first versions of Stormpath's Ruby, Python and PHP SDKs and collaborated with the Java SDK; Consistent usage of design patterns such as Visitor, Request Object, Factory, Singleton; Coordination of core application and SDKs releases; Code reviews for core application and SDKs; Custom JMeter Spring Boot application to measure and validate API benchmarks; Utilized Kanban Agile methodologies; Contribution to open source libraries, such as Greenmail and Stormpath SDKs; Designs and implementations responsible for achieving: The core search feature of the REST+JSON API. Implementation of the custom data search feature and micro services infrastructure. Several critical bug fixes in a timely manner. UI console 100% REST+JSON API based. Faster REST API response by optimizing MySQL database and queries, and by making source code more efficient. Sample applications for external/internal users that helped them understand how the product works so they have a better and faster on boarding process. Faster artifacts builds by parallelizing integration tests with TestNG and Maven failsafe plugin. Environment: MacOS Yosemite/El Capitan/Sierra, Linux, Apache Tomcat, Virtual Box, Maven, Docker, MySQL Server, Spring Framework, Spring Boot Framework, Git, IntelliJ IDE, Postman, Curl, Httpie, Atlassian's Jira/Confluence/Bitbucket/Hipchat, Slack, New Relic, AWS Lambda/Kinesis, Github, Travis, Teamcity. Show less

    • Dominican Republic
    • Telecommunications
    • 700 & Above Employee
    • IT Development Engineer
      • Nov 2008 - Mar 2012

      Directly reporting to the IT Systems Development Manager and Technical Project Managers to day activities and projects; Indirectly reporting to the IT System Architecture Manager for projects designs; Architecture coordinator and resource’s tasks management for Web based projects designs; Design of complex internal applications changes, including the company’s CRM, ensuring that no existing functionalities are damaged; Maintenance and support of Oracle SOA Web Services components… Show more Directly reporting to the IT Systems Development Manager and Technical Project Managers to day activities and projects; Indirectly reporting to the IT System Architecture Manager for projects designs; Architecture coordinator and resource’s tasks management for Web based projects designs; Design of complex internal applications changes, including the company’s CRM, ensuring that no existing functionalities are damaged; Maintenance and support of Oracle SOA Web Services components (BPELs, composites, adapters, etc.); Managed and coordinated production releases, continuous integration and several development enhancements throughout the development team; Designed and implemented applications with portlet technology for the company’s internal portal; Maintenance and new complex implementations of the company’s CRM, interacting with different applications such as Oracle DB, CORBA services, web services; Design, implementation and maintenance of several Java Web Services, using Axis 1.4 and JAX-WS with HTTP Basic Authentication; Coordinated and validated external development for internal applications. Designs and implementations responsible for achieving: Clients interest in the company’s offers and extending their contract’s period. Clients interest in migrating to the new rate plans without having to deactivate and activate new contracts. One of the highest new activations seasons in the company’s history by providing the clients with new rate plans catalog. Lowering the call center calls by providing the clients with IVR self service functionalities. Motivating clients in using the company’s services by providing a nice 2X1 movie theaters tickets. Environment: Windows XP, Ubuntu Linux 10.10, Apache Tomcat, Virtual Box, BEA Weblogic, Oracle Database 10g, Solaris Linux, BSCS Billing System, Liferay Portal, HP Openview Service Desk, TOAD, Eclipse IDE, JDeveloper, SQLDeveloper, SOAP UI, IntelliJ, MS Office, Open Office, Visio, MS Project Show less Directly reporting to the IT Systems Development Manager and Technical Project Managers to day activities and projects; Indirectly reporting to the IT System Architecture Manager for projects designs; Architecture coordinator and resource’s tasks management for Web based projects designs; Design of complex internal applications changes, including the company’s CRM, ensuring that no existing functionalities are damaged; Maintenance and support of Oracle SOA Web Services components… Show more Directly reporting to the IT Systems Development Manager and Technical Project Managers to day activities and projects; Indirectly reporting to the IT System Architecture Manager for projects designs; Architecture coordinator and resource’s tasks management for Web based projects designs; Design of complex internal applications changes, including the company’s CRM, ensuring that no existing functionalities are damaged; Maintenance and support of Oracle SOA Web Services components (BPELs, composites, adapters, etc.); Managed and coordinated production releases, continuous integration and several development enhancements throughout the development team; Designed and implemented applications with portlet technology for the company’s internal portal; Maintenance and new complex implementations of the company’s CRM, interacting with different applications such as Oracle DB, CORBA services, web services; Design, implementation and maintenance of several Java Web Services, using Axis 1.4 and JAX-WS with HTTP Basic Authentication; Coordinated and validated external development for internal applications. Designs and implementations responsible for achieving: Clients interest in the company’s offers and extending their contract’s period. Clients interest in migrating to the new rate plans without having to deactivate and activate new contracts. One of the highest new activations seasons in the company’s history by providing the clients with new rate plans catalog. Lowering the call center calls by providing the clients with IVR self service functionalities. Motivating clients in using the company’s services by providing a nice 2X1 movie theaters tickets. Environment: Windows XP, Ubuntu Linux 10.10, Apache Tomcat, Virtual Box, BEA Weblogic, Oracle Database 10g, Solaris Linux, BSCS Billing System, Liferay Portal, HP Openview Service Desk, TOAD, Eclipse IDE, JDeveloper, SQLDeveloper, SOAP UI, IntelliJ, MS Office, Open Office, Visio, MS Project Show less

    • Dominican Republic
    • Telecommunications
    • 700 & Above Employee
    • Senior Analyst
      • Dec 2007 - Nov 2008

      Directly reporting to the Systems Configurations Specialist and Technical Project Managers to day activities and projects; Lead the implementation of the rate plans and services configuration for an opening telecommunications company of América Móvil in Jamaica, by planning and ensuring the completion on time of the project’s tasks, designing and implementing all of the configurations and helping with the implementation with the Jamaican technical team leader; Analyzed business… Show more Directly reporting to the Systems Configurations Specialist and Technical Project Managers to day activities and projects; Lead the implementation of the rate plans and services configuration for an opening telecommunications company of América Móvil in Jamaica, by planning and ensuring the completion on time of the project’s tasks, designing and implementing all of the configurations and helping with the implementation with the Jamaican technical team leader; Analyzed business requirements, designed and implemented rate plans and services configurations; Created test scenarios for the testing team to run. Validated the results after the tests were completed; Analyzed and fixed production issues that directly affected the clients, providing the solution for all of the same scenario’s problems; Requirements analysis, projects coordination and implementation: Rate plans and services configuration for the group’s new telecommunications company in Jamaica, using the “Ensemble” application. Test cases creation and testing results validation for the new Jamaican company’s rate plans, using HP’s Test Director Application. Services and features configurations using the “Ensemble” application. Production issues fixes by analyzing the client’s situation both on the Oracle data base, by performing complex queries, and on the “Ensemble” application; providing the best solutions for each case. Responsible for achieving: Project coordination and configuration of the whole rate plans catalog for new América Móvil Telecommunications Company in Jamaica. New rate plans and services configuration for the company, increasing the service catalog to fulfill the client’s needs. Clients’ satisfaction by fixing issues with their accounts in little time, while still giving good solutions. Environment: Windows XP, Linux, HP Test Director, Oracle Data Base, Ensemble Application, Lotus Notes Show less Directly reporting to the Systems Configurations Specialist and Technical Project Managers to day activities and projects; Lead the implementation of the rate plans and services configuration for an opening telecommunications company of América Móvil in Jamaica, by planning and ensuring the completion on time of the project’s tasks, designing and implementing all of the configurations and helping with the implementation with the Jamaican technical team leader; Analyzed business… Show more Directly reporting to the Systems Configurations Specialist and Technical Project Managers to day activities and projects; Lead the implementation of the rate plans and services configuration for an opening telecommunications company of América Móvil in Jamaica, by planning and ensuring the completion on time of the project’s tasks, designing and implementing all of the configurations and helping with the implementation with the Jamaican technical team leader; Analyzed business requirements, designed and implemented rate plans and services configurations; Created test scenarios for the testing team to run. Validated the results after the tests were completed; Analyzed and fixed production issues that directly affected the clients, providing the solution for all of the same scenario’s problems; Requirements analysis, projects coordination and implementation: Rate plans and services configuration for the group’s new telecommunications company in Jamaica, using the “Ensemble” application. Test cases creation and testing results validation for the new Jamaican company’s rate plans, using HP’s Test Director Application. Services and features configurations using the “Ensemble” application. Production issues fixes by analyzing the client’s situation both on the Oracle data base, by performing complex queries, and on the “Ensemble” application; providing the best solutions for each case. Responsible for achieving: Project coordination and configuration of the whole rate plans catalog for new América Móvil Telecommunications Company in Jamaica. New rate plans and services configuration for the company, increasing the service catalog to fulfill the client’s needs. Clients’ satisfaction by fixing issues with their accounts in little time, while still giving good solutions. Environment: Windows XP, Linux, HP Test Director, Oracle Data Base, Ensemble Application, Lotus Notes Show less

    • United States
    • IT Services and IT Consulting
    • 700 & Above Employee
    • Software Engineer 1
      • Oct 2006 - Dec 2007

      Directly reported to the QA Software Engineering Team Leader; Maintenance of text parsing Perl and Python scripts to validate the rate plans pricing configuration of the Verizon Business portal; Validated the rate plans pricing configuration with the scripts developed by the team, in testing and production environments; Monitored most of the modules of the Verizon Business portal and created daily reports with their statuses; Involved in achieving: Faster completion of pricing… Show more Directly reported to the QA Software Engineering Team Leader; Maintenance of text parsing Perl and Python scripts to validate the rate plans pricing configuration of the Verizon Business portal; Validated the rate plans pricing configuration with the scripts developed by the team, in testing and production environments; Monitored most of the modules of the Verizon Business portal and created daily reports with their statuses; Involved in achieving: Faster completion of pricing test, thanks to the developed scripts. Visibility to the whole QA team of the modules’ daily statuses to perform any corrective action on time. Environment: Windows XP, Linux, Lotus Notes Creation of daily reports of many of the modules of the Verizon Business portal. Show less Directly reported to the QA Software Engineering Team Leader; Maintenance of text parsing Perl and Python scripts to validate the rate plans pricing configuration of the Verizon Business portal; Validated the rate plans pricing configuration with the scripts developed by the team, in testing and production environments; Monitored most of the modules of the Verizon Business portal and created daily reports with their statuses; Involved in achieving: Faster completion of pricing… Show more Directly reported to the QA Software Engineering Team Leader; Maintenance of text parsing Perl and Python scripts to validate the rate plans pricing configuration of the Verizon Business portal; Validated the rate plans pricing configuration with the scripts developed by the team, in testing and production environments; Monitored most of the modules of the Verizon Business portal and created daily reports with their statuses; Involved in achieving: Faster completion of pricing test, thanks to the developed scripts. Visibility to the whole QA team of the modules’ daily statuses to perform any corrective action on time. Environment: Windows XP, Linux, Lotus Notes Creation of daily reports of many of the modules of the Verizon Business portal. Show less

Education

  • Pontificia Universidad Católica Madre y Maestra
    Systems and Computation Engineer, Software Development
    2004 - 2008

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