Guillermo Serrano

- CI/CD Pipeline Management: Designed, implemented, and optimized GitLab CI/CD pipelines for complex multi-environment projects (dev, stage, prod). Established automated build, test, and deployment workflows using GitLab Runners, ensuring streamlined release cycles and reducing manual deployment errors.

- AWS Cloud Infrastructure: Deployed and managed AWS resources, including EC2, S3, ECS, and ElastiCache, using Terraform and AWS CDK. Facilitated production-ready infrastructure for high-availability applications and collaborated with developers to manage AWS permissions for optimized security and access control.

- Containerization and Orchestration: Built Docker images and containerized applications, managing and troubleshooting issues across services, especially for backend and frontend applications. Configured Amazon ECS clusters and task definitions for Fargate deployments, ensuring consistent application performance.

iOS and Android Mobile DevOps: Configured CI/CD for mobile applications using Fastlane and GitLab runners, enabling seamless build and release processes across iOS and Android platforms. Integrated Apple App Store Connect and Google Play Console requirements, handling app versioning, code signing, and target API updates.

Infrastructure as Code (IaC) and Automation: Automated deployment configurations with Ansible and managed infrastructure provisioning with Terraform. Improved operational efficiency through IaC, facilitating version-controlled and reproducible environments.

Security Management: Managed and configured security groups, IP whitelisting, and access controls across AWS, including jump hosts and SSH configurations for secure server access. Implemented AWS Secrets Manager for secure management of environment variables and sensitive information.

Monitoring and Logging: Established monitoring and alerting mechanisms for AWS services, integrating CloudWatch, SNS, and Firebase logs. Diagnosed and resolved issues such as Firebase token failures and optimized the notification system for high reliability.

Database Administration: Assisted with Azure SQL database maintenance and troubleshooting, handling timeout issues and implementing monitoring on production databases. Managed PostgreSQL databases via MikroORM and optimized for high-performance usage.

Multi-platform Project Support: Provided DevOps solutions for web applications (React, Next.js), mobile applications (Flutter, Fastlane), and backend systems (Nest.js, PostgreSQL, Redis). Enabled smooth cross-functional collaboration between teams, improving the overall software development lifecycle.

• Provided front-end website development using WordPress, Hubspot, and other editing software.
• Planned website development, converting mockups into usable web presence with HTML, JavaScript, AJAX, and JSON coding.
• Worked with software development and testing team members to design and develop robust solutions to meet client requirements for functionality, scalability, and performance.
• Worked with cross-functional design teams to create software solutions that improved overall functionality and performance.
• Coded websites using HTML, CSS, JavaScript, and jQuery languages.
• Monitored automated build and continuous software integration process to drive build/release failure resolution.
• Supervised software life cycle from preliminary needs analysis to enterprise-wide deployment and support.
• Oversaw back-end development using PHP to maintain website integrity.
• Automated and implemented system backup and recovery procedures.
• Managed testing cycles and coordination of user acceptance testing for software and applications.
• Implemented changes and integrated requested elements to streamline business operations.
• Multi-tasked across multiple functions and roles to meet deadlines and organizational expectations.