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Carlos Fco. Montero Ortiz

Vancouver, BC, Canada
me@Carlos-Montero.com

Software Engineering

Profile: Energetic, dynamic, proactive. I find the solution to the problem presented. I have good interpersonal relationship and communication. I am caring, dedicated, trustworthy and responsible in my work.

Work Experience

August 2021 -- Preset. 
Principal Software Engineer.
Splunk - Website

Splunk Inc. is an American technology company based in San Francisco, California, that produces software for searching, monitoring, and analyzing machine-generated data via a Web-style interface

Duties:

  • Starting my journey. Updates will come =)

July 2014 -- August 2021. 
Senior Software Engineer.
Amazon - Website

Amazon is an American electronic commerce company with headquarters in Seattle, Washington. It is the largest Internet-based retailer in the United States. Amazon is one of the leading Tech companies of the world.

Duties:

Advertising – Core Platform

  • Lead, design and execute an end-to-end DevX solution to improve the developer experience across the Advertising organization:
    • Shifted core platform teams to use data-oriented architecture.
    • Prevents Away Team engagement with core platform teams.
    • The system deploys code dynamically across the core platforms without undergoing a deployment or downtime.
    • Language agnostic.
    • Improves the OE experience across the core teams and feature teams.
    • Feature teams can own their development cycle end-to-end.
    • Improves productivity and feature release.
  • Lead, design and execute a cross-organization project to unified global identifiers across the Amazon Ads stack.
    • Project involved 80+ teams, across 5 different Amazon organizations
    • Allowed teams to scale and unblock their roadmaps due to previous ID generator dependency.
    • Decoupled systems and improve latency up to 30% across different APIs across the different systems in the stack.
  • Lead the team to build the system in charge of storing and delivering all the customer intended metadata for Display Ads across all Amazon.
    • Write ahead log based solution with multiple replicas that asynchronously updates downstream dependencies.
    • Support many notifications mechanism to dispatch and replicate the data across multiple systems.
    • Supports federation across multiple teams to enable new features.
  • Lead and raised the bar on the Operational Excellence for the organization.
    • Set the OE strategy and vision to support the tier-1 business operation.
    • Lead and design projects to automate human interventions to improve the team operational weight.
    • Design the infrastructure logistics across multiple regions and stages.
  • Lead tech-talks in the org across multiple teams.
  • Design and develop an end-to-end testing framework to guarantee backwards compatibility while migrating data from the legacy system.
  • Design and build a load test framework for the team that helped identify the system limits.
  • Propose and write vision projects to improve the system to scalability, maintainability and flexibility to add more features while enabling a good customer experience.
  • Design a solution to reduce the system latency by 35%.
  • Mentoring and developing Amazonians.

AWS – Simple Workflow Service

  • Design and create a new consistent hashing algorithm to improve the shard to host distribution.
    • 58% improvement on the standard deviation.
    • Implemented a dynamic migration strategy with no downtime.
    • Improve host throughput
    • Cost reduction.
  • Design and create an annotation-based framework that will gather metrics to have a local cache counter.
    • Works across the AWS teams and services.
  • Design and create a distributed counter that gathers the pending tasks per customer.
    • It is the cornerstone that will help us build a control plane to re-allocate shards depending on the customer traffic
    • Built different features based on these solutions. e.g. send customer related metrics to CloudWatch so they could react accordingly to this data.
  • Design and build a host throttling solution to prevent shards of going down for high traffic or hardware problems.
  • Design and build a load test framework for the team that could be easily plugged in into our different pipelines. The framework would allow each service owner to set it up accordingly to their requirements.
Contribute to the design, creation and development of Workflow Designer. This tool allows process engineers to build systems by using bpm notations. o Create and design a generic library that does the serialization/un-serialization of any given POJO based on annotations to the hierarchical data base. o Create and design the backend APIs that store the metadata needed to build the workflows. o Build the continuous deployment cycles and operation excellence.  In order to reduce the amount of operational work the team was having, I proposed to create self-service tools that were easy to use for our clients to fix their own problems. o Design, create and develop tools and APIs needed for the project. o Proposed an audit functionality to ensure that the entire process would be owned by our clients.  Built an aggregator API that gather information from several resources in parallel.  Contribute to the design, creation and development of the 83+ tools needed for the outsourcing associates so they can properly handle our customer’s cases. o Established the guidelines of development for the team o Created libraries for the team in order to reuse code and reduced their development time. o Did platform improvements of the framework we were using, which was owned by another team, in order to give a better user experience to our clients. o Creation of multiple APIs that were needed in order to build the tools. o By meeting constantly with our clients to gather the requirements needed, I was able to reduce the scope of 3+ tools.  Improved one of the main Case Management backend services availability from 94% up to more than 99% by fixing one of the major bugs.  Fixed the metrics system of one of the main backend service which wasn’t showing any data for more than a month.  Active participation in the migration of the Case Management platform by creating and develop one of the main services, create case. This is the most used functionality by our clients.  Raised the bar on the Operational Excellence for the organization unit. Some of the tasks included were: o Creating a set of dashboards to improve the on-calls experience to determine the root cause of the problem. This helped to reduce the time needed to fix the issue. o Creating and defining the thresholds for the monitors and alarms. o Defining the areas that needed to be monitor. Hardware, VIPs, availability, throughput of the services, dependencies, deep ping tests, among others. o Develop shell scripts for monitoring and management purposes. o Creating service metrics for business projections.  Develop multithreaded Java based applications.  Working on tickets resolution.  Active participation in ScruAmazon is an American electronic commerce company with headquarters in Seattle,
Washington. It is the largest
Internet
-
based retailer in the United States. Amazon is one of the leading Tech companies of the world
Amazon is an American electronic commerce company with headquarters in Seattle,
Washington. It is the largest
Internet
-
based retailer in the United States. Amazon is one of the leading Tech companies of the world
Amazon is an American electronic commerce company with headquarters in Seattle,
Washington. It is the largest
Internet
-
based retailer in the United States. Amazon is one of the ading Tech companies of the world

Marketplace – Seller Experience

  • Redesign Workflow Designer to be a microservice and distributed oriented architecture. The project gained SRP, separation of concerns, scaled better and was able to support different technologies to be exported to.
  • Contribute to the design, creation and development of Workflow Designer. This system allows process engineers to build workflows by using bpm notations without the need of software engineers.
    • Established the development guidelines for the team.
    • Create and design a framework that does the serialization/un-serialization of any given POJO based on annotations to the hierarchical data base.
    • Create and design the backend APIs that store the metadata needed to build the workflows.
    • Build the continuous deployment cycles and operation excellence for every part of the project.
    • Creation of batch processes to constantly update our tools metadata in AWS.
    • Creation of UI components.
    • AWS management.
    • Bar raiser of designs and code reviews related to the project.
    • Developed the most critical features of the project.
  • Lead the Design Reviews in Costa Rice Dev Center across multiple teams.
  • In order to reduce the amount of operational work the team was having and improve the costumer experience, I proposed the creation of self-service tools for our clients in order to decreased MTTR.
    • Design, create and develop the tools and APIs needed for the project.
    • Proposed and built an audit functionality to ensure that the entire process would be owned by our clients.
  • Built an aggregator API that gather information from several resources in parallel.
  • Contribute to the design, creation and development of the 83+ workflows.
    • Established the development guidelines for the team.
    • Created shared libraries for the team in order to reuse code and reduced their development time.
    • Performed enhancements to the workflow engine we were using in order to improve the experience of our clients.
    • Creation of back-end APIs that were needed in order to build these workflows.
    • Met with our clients to gather the requirements they needed. By working backwards from the client, I was able to reduce the scope of 3+ workflows.
  • Active participation in the Case Management platform migration:
    • Create and develop the main service: create case. Create case is the most used functionality by our clients.
    • Improved the search service availability from 94% up to more than 99% by fixing one of the major bugs
  • Raised the bar on the Operational Excellence for the organization unit:
    • Creation of dashboards to improve the on-calls and ops-review experience to determine the root cause of any given problem. This helped to reduce the time needed to find and fix the issue on a high severity event.
    • Creation and definition of monitors and alarms that controlled our services health.
    • Defining the areas that needed to be monitored: Hardware, VIPs, availability, throughput of the services, dependencies, failures, deep ping tests, among others.
    • Developed shell scripts for monitoring and management purposes.
    • Creation of service metrics for business projections.
    • Fixed the metrics system of the main backend service which wasn’t showing any data for several months.
  • Developed multithreaded Java based applications.
  • Active participation in Scrum

March 2013 -- July 2014. 
Software Engineer.
Backcountry - Website

Backcountry is an online retailer that sells outdoor recreation gear for hiking, camping, cycling, rock climbing, snow sports, and more. 
Non the less, Backcountry is a very powerful and mature IT company.

Duties:
  • Contribute to the design, creation and development of the HUB 2.0.
  • Contribute to the design, creation and development of company’s cache using MongoDB.
  • Contribute to the design, creation and development of the cache rest server.
  • Contribute to the design, creation and development of the feeds re-platform service.
  • Contribute to the design, creation and development of the emails re-platform service.
  • Develop of different reports for the business.
  • Creation of continuous delivery workflows using Team City and Jenkins for our applications.
  • Develop shell scripts for monitoring and management purposes.
  • MongoDB management.
  • Develop multithreaded Java based applications.
  • Active participation in Scrum

July 2010 -- March 2013.
Software Specialist
GBM Corporation - Website

GBM is an IBM Alliance Partner since 1991. GBM has assimilated the best of the organizational culture of their partner IBM, which has allowed to have the latest technology platforms available. I started my contract as an intern in order to finish my Bachelor degree. Once I finished my internship, they hired  me to be part of a regional software department based on SOA practices. Since the beginning of my journey I was assigned to GBM's main project. Working on the team in charge of integrating the various systems comprising the solution of a project named PESSO which is a project that has a national impact since we are working with Costa Rica’s only national telecom company.

Duties:
  • Active participation in activities through all phases of the system development life cycle.
  • Active participation in meetings with the client.
  • Development of the enterprise service bus. This includes any type of messaging: Web Services, queues, SCA, etc.
  • Development of scripts in Shell and Python required in order to automate the deploying and monitoring of the applications.
  • The development of different programs or modules required for the enterprise service bus.
  • The development of a dashboard using JMX to facilitate monitoring services.
  • The development of a Telnet Client for integrating different services to an Ericsson platform.
  • Manage the infrastructure where our applications runs, mainly the application and process server.
  • The development of Python programs in order to test the performance of new production enviroments.
Besides, I have done Proofs of Technology, Proofs of Concepts and inner training to my department teammates
 
February 2012 -- April 2012.
Software Consultant
Glice Comercial
As part of my personal goals, I took on a project to build a parking logistics application. Some of the challenges that made this a very attractive project included: the application needed to be lightweight with a very small memory footprint allowing it to be run on a very basic computer; the design of a simple and user friendly interface so the change of application did not affect the employees; the different payments needed it for their clients. The results surpassed the stakeholder's expectation. The technologies used for the development of the application were: Java for the backend, reports and graphic interface development; MySQL for the database management system.

Jan 2010 -- May 2010.
Software Specialist.
GBM Costa Rica - Internship - Website

During my internship I was assigned to a project called VertICE with the ICE, Costa Rica’s national telecom company. This project’s goal is to restructure ICE’s OSS and Monitor System. 

Duties:

  • Active participation in activities through all phases of the system testing life cycle.
  • Active participation in meetings with the client.
  • Design of the traceability matrix and knowledge plan.
  • Implementing black and white box testing, non functional testing, report bugs, and test automation.
  • The development a robot in order to simulate the CRM full fitment process so the testing could be done. 
  • Used the Quality Manager Tool for managing our quality processes.

Teaching Experience

August 2011 -- December 2012.
Professor:  Programming II
Universidad Internacional de las Américas - Website                                                                                  

I’m in charge of teaching the course of Programming II. The course aims to teach the students the paradigm of object-oriented programming using JAVA language with strong UML design. It starts since the most basic concepts until they can make a truly object-oriented application with a graphic interface and database connection. I try to begin teaching them about OOP design patterns, and the best practices of programming. I recreated the course content for the purpose to be more reliable for nowadays needs. 

August 2011 -- December 2012. 
Professor: Computer Language
Universidad Internacional de las Américas - Website

I'm in charge of teaching the course of Computer Language. The course aims to teach the students the importance of the DBMS; why are they important in today's business operations. The course teaches them to design, and create from the start a data base. Once it's well defined by going through a database normalization, they begin administrating the database by using the SQL language throughout different types of queries among the database's tables.

 

Key Skills

Information Technologies / Engineering

Skills: Distributed systems patterns and design, concurrency, micro-services, Operational Excellence, SOA, AWS design and development, NoSQL and relational data-bases, Webservices with different standards like REST, GRPC, SOAP and others, design pattern, OOP, AOP, programming languages with emphasis on Java, Go, Python and JavaScript, Shell Scripting, testing skills, infrastructure management, design and review Use Cases, UML, business concepts like BPM, BPEL, and SCA, understanding off different technologies like MQ and JMS, HTML-Dojo, JSP, HTML, Android development, Maven, Spring, Git, Hibernate, Resteasy, JSON, among others and willing to learn.
Experience: 12+ years of experience of leading distributed systems, University with honors, and self-study
Achievements: Recognition from the Korean Institute of Science and Technology, certifications, courses, excellent feedback across peers, and over achievement my qualifications in Amazon and in my previous workplaces

Communication

Skills: Mentoring, leadership, understanding and ease in interpersonal relationships.
Experience: I was a college professor for almost two years, which by definition require interpersonal relationships and easy expression of ideas, patience, and nice communication. Lead and orchestrate meetings, presentations and projects throughout my professional career.
Achievements: Being one of the most qualified teachers of the department in each semester evaluations made by students. Having very good feedback from my supervisor and colleagues. Being thanked by my students for their achievements in their respective work 

Education

2007-2010 Bachelor's Degree in Software Engineering with Honors.
Universidad Latina de Costa Rica  - Website

2007-2010 Associate's Degree in Development and Software Technologies with Honors.
Cenfotec - Website

2006 High School.
Saint Francis College

Certifications

2010 - IBM Certified Solution Developer. WebSphere Integration Developer V6.2
2011 - IBM Certified Solution Associate BPM Developer BPM Blueprint. WebSphere Lombardi Edition V7.1
2011 - IBM Certified Integration Developer. WebSpehre Enterprise Service Bus V7.0
2012 -IBM Certified SOA Associate
2012 -IBM Certified SOA Solution Designer

Additional Professional Qualifications

2007 - Universidad de Costa Rica. San José, Costa Rica. CCNA Module I
2007- Universidad de Costa Rica. San José, Costa Rica. CCNA Module II
2007- Universidad de Costa Rica. San José, Costa Rica. CCNA Module III
2007- Universidad de Costa Rica. San José, Costa Rica. CCNA Module IV
2010- GBM. San José, Costa Rica. IBM WebSphere Portal V6.0 Fundamentals.
2010-  GBM. San José, Costa Rica. IBM WebSphere Portal V6.1 Application Development I and II.
2011- Universidad Ulacit. San José, Costa Rica. Android Application Development
2012- GBM. San José, Costa Rica. IBM WebSphere Application Server v8.0
2012- GBM. San José, Costa Rica. IBM WebSphere Virtual Enterprise
2012- Udacity. Building a Search Engine
2013- MongoDB University. M101J: MongoDB for Java Developers
2014 to Present - 38 Amazon Internal Certifications.

Languages

Spanish -- Native
English -- Speak fluently and read/write with high proficiency