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- Name: Jesús Valdemar Benítez Castañeda
- Role: DevOps Engineer & Java Developer
- Location: Jalisco, MX (Remote Ready)
- Mission: Automating infrastructure and delivering reliable, secure, and scalable software.
- Status: Open to new challenges in DevOps, Cloud, and Java / Spring Boot ecosystems.
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Technical Skills
DevOps & DevSecOps
Automation, Cloud & Security
Automated delivery from code to production:
- CI/CD pipelines for unit tests, artifact creation, and container builds
- Terraform for versioned network and database provisioning
- Docker and Kubernetes for orchestration and scalability
- SonarQube and Checkmarx for vulnerability mitigation
- AWS IAM access control following the principle of least privilege
Java & Spring Boot
Java & Spring Boot Microservices
Designing and maintaining RESTful APIs with the Spring ecosystem:
- Clean Architecture (Model-Repository-Service): refactored legacy endpoints, reducing response time by 30%
- RESTful APIs with Spring Boot, Spring Data JPA, and MVC
- L3 support and incident management with Jira
- Technical documentation with Swagger and UML
Homelab & Self-Hosted Infrastructure
Proxmox, K3s & Zero Trust
Self-managed lab that emulates production environments:
- Proxmox VE managing Debian and Ubuntu Server virtual machines
- Distributed K3s cluster across multiple physical nodes, including ARM (Raspberry Pi)
- Secure remote access with Cloudflare Tunnels and Zero Trust principles, with no public ports exposed
- GitOps approach for maintenance, monitoring, and data persistence
Database Optimization
Data & SQL Performance
Tuning database workloads for critical banking systems:
- Oracle 11g stored procedure and complex SQL optimization
- Performance tuning that meets DBA standards
- Reliable, high-availability data access for microservices
Python & FastAPI
Python & Scripting
- FastAPI for REST APIs
- Python and Bash/Shell scripts for automation
- Linux server administration (Debian, Ubuntu, Zorin OS)
Professional Experience
DevOps Engineer / Java Developer
Tata Consultancy Services
- Designed and automated CI/CD pipelines for Java applications, integrating unit test execution (Spring) and artifact creation through Docker containerization.
- Implemented Infrastructure as Code (IaC) with Terraform for automated, consistent, and versioned provisioning of networks and databases.
- Orchestrated the service lifecycle by managing multiple Docker containers in Kubernetes clusters, ensuring system scalability.
- Managed cloud security policies and access control by configuring roles and permissions with AWS IAM, applying the principle of least privilege.
Java Microservices Developer & DevOps Support
Stefanini Mexico
- Optimized system performance and maintainability by refactoring legacy endpoints into Clean Architecture, reducing response time by 30%.
- Integrated continuous code quality practices (DevSecOps), identifying and mitigating vulnerabilities with SonarQube.
- Contributed to the cloud ecosystem by supporting basic interactions with AWS services for development environments.
- Documented the complete microservices and infrastructure architecture (Swagger, UML), reducing developer onboarding time by 25%.
- Developed and provided L3 support for RESTful APIs using the Spring stack (Boot, Data JPA, MVC) and Maven, managing incidents efficiently with Jira.
Java Backend Developer
NTT Data Mexico
- Participated in defining and implementing continuous integration (CI/CD) practices to streamline production releases of banking microservices.
- Gained public cloud experience by collaborating on operational and deployment tasks on Google Cloud Platform (GCP).
- Ensured database performance by tuning and optimizing stored procedures and complex SQL queries in Oracle 11g.
- Managed the incident and change lifecycle by applying ITIL best practices through ServiceNow and Jira.
Java & SQL Developer
National Electoral Institute (INE)
- Developed specialized SQL queries to optimize the performance of stored procedure packages in Oracle 11g.
- Identified and remediated security vulnerabilities in Java code using the Checkmarx analysis tool.
- Improved and fine-tuned SQL code to ensure compliance with rigorous DBA standards.
Java Developer
Grupo Salinas S.A. de C.V.
- Maintained the codebase of the fiscal system and developed applications for corporate tax calculation.
- Developed complex logic in Oracle 11g stored procedures.
- Identified and fixed security vulnerabilities using SonarQube and Checkmarx.
- Proactively managed services in Linux environments (SCM Server and MongoDB).