Java Software Engineer

ISRAEL HERNANDEZ CHAVEZ

java software engineer

714-***-**** ******.*******@*****.*** Bentonville, AR 72712 https://www.linkedin.com/in/israel-hernandez-chavez/

PROFESSIONAL SUMMARY

Innovative Java Software Engineer with 15+ years of experience specializing in Spring Boot, Kafka, Microservices, and Cloud Computing (Azure, GCP) to build scalable, high-performance enterprise applications. Deep expertise in Google Cloud Platform (Big Query, Data Proc, Cloud Storage) for advanced data analytics and big data processing. Strong background in distributed systems, leveraging Kafka for event-driven architectures and containerization with Docker and Kubernetes to enhance reliability and scalability. Skilled in SQL (SQL Server, Oracle) and NoSQL (Cassandra DB) for efficient data management. Proven ability to modernize legacy systems, drive API development, and collaborate across teams to deliver innovative, business-aligned solutions.

WORK EXPERIENCE

Software Engineer III Walmart Inc. Bentonville, AR September 2021 – Present

Working on international supply chain systems, enhancing store inventory management, demand forecasting, and replenishment to meet business requirements and drive operational efficiency through technology-driven solutions.

Design and maintain mission-critical data applications such as Order Well and Metis, applying best practices to ensure high availability and optimized data flow

Design scalable microservices with Spring Boot, Kafka, Cassandra, and SQL Server, ensuring fault tolerance and optimized performance.

Optimize big data analytics with GCP Data proc, Big Query, and Cloud Storage, applying industry standards for workflow efficiency.

Strengthen CI/CD pipelines and security using GitHub Actions, Kubernetes, Docker, and Snyk, integrating automation and risk mitigation techniques.

Utilize Agile methodologies like Scrum and Kanban in daily development workflows to improve collaboration and efficiency.

Implement design patterns for scalable, maintainable enterprise applications, ensuring clean architecture and modularity.

Senior Java Backend Developer Walmart Inc. (Contractor) Bentonville, AR September 2019 – August 2021

Designed and developed software solutions for international supply chain systems, ensuring technical specifications aligned with business requirements. Developed and maintained a direct diagnostics application, responsible for displaying key performance indicators (KPIs) for international markets.

Developed and maintained microservices-based applications, leveraging Java, Spring Boot, and Spring Framework Core for REST services and dependency injection.

Built scalable data processing solutions, integrating Java Spark 2.0, Hadoop Cluster, Teradata, and Big Query for efficient data loads and deployments.

Managed source control and code quality, overseeing pull request reviews and leveraging GitHub for version control.

Implemented CI/CD pipelines, utilizing Jenkins, Concord, GitHub Actions, One Ops, Maven 3, and security tools like SonarQube for automation and risk mitigation.

Participated in Agile development, attending scrum, backlog, and retrospection meetings.

IT Professional Programming CEVA Logistics Mexico City May 2019 – September 2019

Led the development and implementation of new requirements for the Customer Service Portal, ONEFreight system, and FMLoader application to enhance functionality and efficiency.

Participated in Scrum meetings to align development efforts with agile methodologies.

Developed and maintained backend services using Java 8 and Spring Boot 2 for the FMLoader application.

Built and optimized frontend interfaces for CSP and ONEFreight systems using JavaScript, HTML, CSS, and Primefaces.

Managed project dependencies and builds using Maven 3 across CSP, ONEFreight, and FMLoader systems.

Utilized GitLab for version control, ensuring efficient code management and collaboration.

Business and Integration Arch Specialist Accenture Mexico City May 2017 – April 2019

Worked on the banking domain for one of Accenture's clients, analyzing, designing, and developing new requirements for the currency exchange and treasury systems, ensuring seamless integration and functionality, while tracking changes using the Maximo tool.

Led analysis, design, and development of new requirements for Crisol V, ensuring seamless integration with existing systems.

Managed maintenance and enhancements for applications such as SICA, SITE, and Batch Processes, optimizing performance and reliability.

Developed and exposed services using Java EE, Spring Boot, and Hibernate 3.0, incorporating core features like session management and transaction handling.

Designed and implemented front-end interfaces with JavaScript, HTML, CSS, and jQuery, improving user experience for various applications.

Provided production support, troubleshooting issues, running production cycles, and creating custom JPA queries and PLSQL scripts for efficient database interactions.

Senior Software Engineer Praxis Mexico City October 2004 – May 2017

Worked in software development across diverse domains, including banking, insurance, and government, delivering scalable and efficient solutions tailored to industry-specific requirements for various Praxis clients.

Software Development & System Design: Led analysis, design, and implementation of business requirements, using Java EE, Spring Boot, Hibernate, and JPA for backend development.

Front-End Development & UI Enhancement: Developed and maintained user interfaces using JavaScript, HTML, CSS, jQuery, and Primefaces across multiple applications.

Database & Performance Optimization: Designed integration databases with ERD diagrams, wrote SQL, PL/SQL, and T-SQL queries, and optimized stored procedures for efficient data management.

Technical Leadership & Project Execution: Oversaw development in an onshore-offshore model, mentoring team members, managing project plans, and ensuring timely delivery.

Application Deployment & Support: Deployed applications using Wildfly and WebLogic, implemented authentication mechanisms with Spring Security and LDAP, and provided production support by troubleshooting issues and optimizing workflows.

ADITIONAL EXPERIENCE

Softtek, Mexico City, Java Developer, 2004 – 2005. Performed analysis of new requirements, utilizing UML design to structure solutions, implementing findings with Java technology (J2EE), and ensuring quality through thorough application testing.

TCDS, Mexico City, Java Developer, 2004 – 2004. Designed and implemented Java classes, analyzed new requirements using UML design, developed web pages with JSP, conducted application testing, and resolved bugs to ensure optimal functionality.

Siempre S.A de C.V, Mexico City, Analyst Designer, Programmer, 2000 – 2004. Analyzed and implemented requirements using Java technology, developed web pages with JSP, and designed Java classes to support the full application functionality.

EDUCATION

Bachelor’s Degree Computer Science Autonomous Metropolitan University (UAM) Mexico City. 1992 – 2000

CERTIFICATIONS

Sun Certified Programmer for the Java 2 Platform (SCJ2P) Sun Microsystems 2002

SAP Certified Development Associate – ABAP with SAP NetWeaver 7.0, SAP SAP 2012

TECHNICAL SKILLS

Programming Languages & Technologies

Java (1.2, 1.4, 5, 6, 7, 8, 17), JEE, J2EE, Java Spark 2.0, SOAP, REST Services

SQL, PL/SQL, Transact-SQL, Oracle (8i, 10g, 11g, 12c), SQL Server (2012, 2014, 2016), Sybase 15

HTML5, JavaScript, XML, JSON, CSS3, CSS4

Frameworks & Libraries

Spring (Spring 3.0, 4.0, 4.3, Spring Boot 2, Spring MVC, Spring Security, Spring Data, Spring AOP)

Hibernate (3.0, 4.3), JPA 2, JAXB 2.0, Icefaces 1.7, Primefaces 5, Tapestry

Jasper Reports, Velocity 1.4, Quartz, Log4J

Design Patterns

Singleton, DAO, DTO, Business Delegate, Service Facade, Factory Pattern, Front Controller, MVC Pattern

Application Servers & Cloud

WebLogic (6, 8, 10g, 11g, 12c), Apache Tomcat 8, IBM WebSphere (8.x, 9.x), Wildfly 9, Tomee

Hadoop Cluster, Azure SQL Database, Teradata Database

Development Tools

Eclipse (Photon, Luna, Java EE IDE for Web Developers), NetBeans, IBM RAD, JDeveloper, SQL Developer

TOAD, Aqua Data, DBeaver, WinMerge, WinSCP, Putty, Rational Rose

Testing & CI/CD

Sonar, Jacoco, JUnit 4.12, JMeter, Code Coverage, Fortify

Ant, Maven (3.3.9), Jenkins

Version Control & Build Tools

Git, CVS, SVN

Messaging & Integration

JMS MQ, IBM MQ, SOAP, WSDL, JAX-WS, JAX-RS

Security & Authentication

Spring Security, LDAP, CCM from Walmart

Methodologies

Agile, Waterfall, Scrum, Kanban

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