Johnny Marcos

I’m a Software Engineer with more than 15+ years working in the IT industry, with extensive experience in systems of different segments and platforms, team management, design of solutions based on the development, support and administration of the infrastructure, hands-on experience in developing, testing, and maintaining web-based applications. Motivated problem solver and strong communicator looking to advance and expand skill set through mentorship and challenging projects. Expertise in Operating Systems, Data structures, and algorithms, Database management Systems.

Willing to relocate: Anywhere / Authorized to work in the US for any employer

Work Experience Java/Spring Boot Developer

Rethink Solutions IT - Brazil, SP, December 2021 to Present

Involved in various phases of Software Development Life Cycle (SDLC) such as requirements gathering, modelling, analysis, design, development, testing, and monitoring.

Created various microservices following the SOLID principles both REST API and backend processor and worked with team for the end-to-end validation and production

deployment.

Used Java 8 features like lambda expressions and Java Stream API.

Implemented the REST API's and data transformers using the JAVA connector which involves use Java 8 features Lambda and Streams in particular

Developed various scalable micro for CPA Assistance integrations across upstream and downstream vendors using the OAuth authentication.

Implemented the application using Spring JPA, Spring MVC Framework, Spring JPA,

Spring ORM and handled the security using Spring Security.

Implemented Microservices architecture using SpringBoot for making application smaller and independent and self-sufficiently scalable in PCF.

Implementing or exposing the Microservice architecture with Spring Boot based services interacting through a combination of REST.

Used Rest Controller in Spring framework to create RESTful Web services and JSON objects for communication.

Implemented Log4j technology for a broader perspective of the project.

Developed test classes in JUnit for unit testing.

Used Postman to test the RESTful API for HTTP requests such as GET, POST, and

PUT.

Pair programming helped in reducing the time and cost spent on testing.

Called the Restful web services calls for POST, PUT, DELETE and GET methods.

Deployed the application to PCF and used the CI/CD Jenkins pipeline for prod deployments.

Worked on creating the clustered/non clustered index based on the Spring JPA

Query and Data repository methods.

Performance testing of the API’s using the JMeter and worked with business stakeholders in presenting the Platform services usage.

Actively participated and provided feedback in a constructive and insightful manner during weekly Iterative review meetings to track the progress for each iterative cycle and

figure out the issues.
Total Profit Return to the company in Projects $500,000.00/Year Company's Customers: Smiles-GOL(Flight) / Rumo(Transport)

Technical Leader (Full Stack Developer)

Sysmap Solutions, Brazil, SP, March 03 to December 2021

Technologies: Oracle SOA Suite, Oracle Service BUS, Oracle BPM, ADF, APIGee, ETL, Agile, Scrum, Microservices (Java, Spring Boot, Spring Batch, JPA, Hibernate, OCI, Oracle DB, MongoDB, SQL Server, AWS, Apache Jenkins (CD/CI), Swagger;

Hardware Technical Program Management Department – Product owner of all power related Printed Circuit Board Mobiles Phone;

Ensuring excellent ownership of main company business areas. Providing quality feature delivery, architecture decisions as well as supporting top-level business compliances.

Responsible for the Payment HUB systems integration, telecommunications / IT architecture teams, including design, implementation and operation. Technical project

management;

Responsible for regulatory processes with CIELO and REDCARD, being primarily responsible for transforming operations from NET / Nextel Client to Claro into a

telecommunications operator;
Total Profit Return to the company in Projects $400,000.00/Year
Company's Customers: Claro,Telefonica(Telecomunitations) / Sem Parar(Toll)

Software Engineer

Fornax IT Solutions, Brazil, SP, March 2016 - March 2019

Technologies: Drupal, Angular JS, Node-JS, React Native, Ionic, Elasticsearch, PL-SQL, Oracle Service BUS, Oracle SOA, WebLogic, Salesforce, SVN, GitHub, Java (Spring Boot, Spring Batch), AWS, EKS, Logstash, Kibana, Logfile, Docker, Agile, Scrum, Microservices, MuleSoft;

I was responsible for the team of full-stack developers in the construction of micro-services and web development, the technologies involved in the construction of these services.

Expertise in Migration of Oracle SOA Suite 12 for MuleSoft, Implementation of BAM management reports, design of solution for integration layers APIs building Microservices with MuleSoft;

Leader in the project of redefinition and critical analysis of processes. Responsible for defining communication strategies, training and organizational impacts, a nd the respective preparation of its application materials. Created the project schedule in addition to the management and control of its deliverables.

I was responsible for the development, implementation, and maintenance of Java-based applications. I have worked closely with architects and other developers to design and build high-quality, scalable, and secure software solutions. I have also mentored and provided technical guidance to less experienced developers.

Followed Scrum Agile methodology for the iterative development of the application.

Involved in designing and creating the Database Tables using PostgreSQL Database.

Worked on Liquibase which is a source control database

Involved in implementation of CI (Continuous Integration) using Jenkins. And involved in configuring pipeline using Blue Ocean Pipeline for project build on Jenkins.

Used Hibernate to store the persistence data into the PostgreSQL database and wrote HQL to access the data from the database.

For application deployment we have used Docker Containers

Total Profit in Projects $600.000,00/Year
Customers: Riachuelo(Whosale), Porto Seguro(Insurance), CVC(Travel)

Solution Architect

DHL Global Forwarding, Brazil, SP, January 2015 - March 2016
Technologies: Salesforce, BPA (Business Process Automation), FAN, Follow Net, BPA Server tool, MasterSaf, Radar;

Responsible for orchestrating all the projects regarding customs clearance.

Developed a network of non-ecommerce services for SEO, marketing, and customer acquisition. Participated in the development and updating of a number of software and

hardware projects.

Launched corporate enterprise portal based on Salesforce Report.

Proactive monitoring and increased Business Process Automation.

Created a dynamic client generator mechanism.

Total Profit in Projects $400.000,00/Year Customers: DHL (Transport)

Java Developer

Embraer, Brazil, SP, December 2012 to January 2015

Technologies: Java, J2EE, Servlets, JSP, JavaScript, XML, HTML, CSS, UML, Web Logic Application server, JavaScript, My Eclipse IDE, MySql, Hibernate 3.x, Spring MVC, AJAX, JUnit, DAO.

Developed Controllers for request handling using spring framework.

Involved in Command controllers, handler mappings and View Resolvers.

Implemented Hibernate as ORM tool to store the persistence data into Oracle database and SAS/SQL for creating patient profiles for the investigators.

Used JMS (Java Messaging Service) for asynchronous communication between different modules

Developed the application using JSF framework that leverages the classic MVC architecture.

Designed and developed application components and architectural proof of concepts using Java, EJB, JSP, JSF, Struts, and AJAX.

Participated in Enterprise Integration experience web services.

Configured and Deployed application on IBM Web Sphere Application Server.

Configured JMS, MQ, EJB and Hibernate on Web sphere and JBoss, developed XML files for mapping requests to controllers

Hibernate templates were used to access database, use the DAO in developing application code, developed stored procedures.

Extensively used Java Collection framework and Exception handling.

Extensively used OOPS concepts, Multi-threading, connected applications to Oracle database via Oracle JDBC Driver to generate and display various reports.

Design and Develop Servlets, JSPs, Struts, Stream JavaBeans with dependency injection to implement JSF Framework.

Master Of Computer Applications - MCA In Computer Science Harvard University
January 2022 to December 2024

Bachelor Electrical Engineering Faculdade de Sao Paulo, Brazil, SP