Guillermo Antonio Alvarado Mejia, Developer in Guadalajara, Mexico
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Guillermo Antonio Alvarado Mejia

Verified Expert  in Engineering

Site Reliability Engineering (SRE) Developer

Guadalajara, Mexico
Toptal Member Since
February 14, 2022

Guillermo is a skilled DevOps engineer with 11 years of experience in IT and seven years of hands-on experience architecting, automating, supporting, and optimizing mission-critical deployments over large infrastructures. He's proficient with cloud infrastructure, Python, Bash, and developing CI/CD pipelines. He started his career as a software engineer, so he's been able to develop an end-to-end vision. His goal is to deliver results on time and within budget without compromising quality.


Sentinelle Labs SpA
Cloud Architecture, Site Reliability Engineering (SRE), Automation, Terraform...
Instituto Internacional de Ciencia de Datos
Amazon Web Services (AWS), MongoDB, Elasticsearch, Redis, PostgreSQL...
KIO Networks
OpenStack, Jenkins, Linux, Ansible, Automation, DevOps, Docker, MySQL, GitLab...




Preferred Environment

Linux, Ansible, Terraform, Packer, Jenkins, Docker, Google Cloud Platform (GCP), Amazon Web Services (AWS), DevOps, Site Reliability Engineering (SRE)

The most amazing...

...project I've deployed and supported is a private cloud for a banking-as-a-service strategy, using DevOps to streamline new products and maintain reliability.

Work Experience

Engineering Manager, Cloud Services

2015 - PRESENT
Sentinelle Labs SpA
  • Managed, improved, and monitored high-availability, auto-scalable, and secure cloud infrastructure on GCP, AWS, and IBM Cloud, including backups, patches, and scaling.
  • Built infrastructure as code with Terraform and Packer, eliminating 80% manual work.
  • Created and maintained fully automated CI/CD pipelines for code deployment using Jenkins and Spinnaker.
  • Built solutions that improve the reliability of systems, fixing issues and responding to incidents.
Technologies: Cloud Architecture, Site Reliability Engineering (SRE), Automation, Terraform, Jenkins, Packer, Python, Bash Script, DevOps, GitLab, DigitalOcean, Ubuntu Server, NGINX, PHP, HAProxy, Amazon Web Services (AWS), CI/CD Pipelines, Kubernetes, DevOps Engineer, PostgreSQL, Bitbucket, GitHub, Jira, Python 3, Google Cloud Platform (GCP), Go, APM, Grafana, Elasticsearch, Prometheus, Databases, System Administration, Vagrant, SOP Development, Datadog, Node.js, Cloudflare, Shell Scripting

Principal Cloud Architect

2017 - 2021
Instituto Internacional de Ciencia de Datos
  • Developed a cloud strategy and coordinated the adaptation process, which includes guiding research and analysis, decision-making, and alignment with the business objectives.
  • Optimized and reduced the infrastructure footprint saving 35% monthly by migrating existing applications to containers and Kubernetes.
  • Monitored the existing infrastructure for performance and ensured that the platform and the surrounding ecosystem of microservices and their dependencies operated smoothly and reliably.
Technologies: Amazon Web Services (AWS), MongoDB, Elasticsearch, Redis, PostgreSQL, Amazon RDS, NGINX, HAProxy, Jupyter, Jenkins, GitHub, Jira, Confluence, Vagrant, Documentation, SOP Development, Datadog, Node.js, Cloudflare, Shell Scripting

Lead DevOps Engineer

2012 - 2015
KIO Networks
  • Set up and maintained 99.99% uptime for SaaS software and three-tier applications for several customers in different platforms like AWS, OpenStack, VMware, and RHV.
  • Designed and deployed private clouds based on OpenStack for customers in Mexico and Latin America.
  • Deployed and supported Hadoop clusters for big data projects.
  • Wrote and tested Ansible playbooks to configure and perform tasks on remote nodes, reducing deployment time for critical agile project infrastructure from one month to three days.
Technologies: OpenStack, Jenkins, Linux, Ansible, Automation, DevOps, Docker, MySQL, GitLab, DigitalOcean, Ubuntu Server, Engineering Software, NGINX, PHP, HAProxy, Amazon Web Services (AWS), CI/CD Pipelines, Kubernetes, DevOps Engineer, PostgreSQL, Bitbucket, GitHub, Google Cloud Platform (GCP), Django, Flask, Python 3, Go, APM, Grafana, Elasticsearch, Prometheus, Databases, System Administration, Varnish, Documentation, SOP Development, Datadog, Node.js, Shell Scripting, Heroku

Senior Software Engineer

2010 - 2012
  • Rewrote shell deploy scripts, reducing deployment times from 5+ hours to less than five minutes.
  • Integrated APIs from vendor solutions such as ServiceNow, CA Process Automation, and Nimsoft.
  • Designed and developed SaaS software deployed on PaaS like Heroku and App Engine.
Technologies: Python, Bash Script, Linux, JavaScript, Agile, Ubuntu, CentOS, APIs, Ubuntu Server, NGINX, PHP, Bitbucket, GitHub, Django, Flask, Documentation, Shell Scripting, Heroku

Cloud-native Environment for Banking as a Service

Participated in the design, deployment, and support of a cloud-native environment based on Red Hat OpenStack and Red Hat Openshift for a Bank in Mexico that was about to launch a series of capabilities to integrate their digital banking services directly into the products of other non-bank partners.

With DevOps tools and automation capabilities, we orchestrated containerized banking modules that made service uptime much easier to achieve, from monitoring to alerting to remediation, enabling faster development of new products and easier maintenance of existing deployments.

Data Science Platform on Kubernetes

The main goal was to provide the data science team with an environment to access, analyze, monitor, and visualize data. The solution was designing and supporting a data science platform deployed on Kubernetes.

The solution is based on JupyterHub, integrating it with a Kubernetes engine that allows for a robust and scalable version of JupyterHub. It gives the ability to deploy containerized environments while not being tied to any one cloud provider and giving users access to computing environments and resources.

Our team was responsible for meeting any user requests like installing packages and the use of new features and tools like MongoDB, MySQL, Spark, and Gitlab.

Migrating an On-prem 3-tier App To AWS

The business challenge was to migrate the servers hosting of 3-tier applications from on-premises to AWS Cloud in a short span of four weeks​.

I led the team that assessed the current situation and performed an application inventory to know the overall complexity. We decided what to re-host or re-platform, and after that, we designed a solution using the Well-Architected Framework.

We planned and executed a proof of concept in the cloud by testing out a subset of functions in a risk-free sandbox to gain confidence in the migration. Then we migrated the workloads without serving customer traffic to gradually start serving minimal traffic. We implemented telemetry and instrumentation and finally decommissioned the legacy solution.
2009 - 2011

Specialization in Software Engineering

Morelia Institute of Technology - Morelia, México

2007 - 2011

Bachelor's Degree in Computer Science

Morelia Institute of Technology - Morelia, México


HashiCorp Certified: Terraform Associate (003)



Certified OpenStack Administrator

Open Infrastructure Foundation

APRIL 2019 - APRIL 2021

Google Certified Professional Cloud Architect


AUGUST 2017 - AUGUST 2020

Certified System Administrator in RHOSP

Red Hat

MAY 2015 - MAY 2017

Mirantis Certified Administrator for OpenStack





Ansible, Terraform, Packer, Jenkins, Jupyter, GitLab, NGINX, GitHub, Jira, Bitbucket, Grafana, Varnish, Vagrant, Confluence


Flask, Django, Spark


DevOps, Automation, Agile


Python, Python 3, Bash Script, JavaScript, PHP, Go


Linux, Docker, Google Cloud Platform (GCP), OpenStack, DigitalOcean, Ubuntu, CentOS, Kubernetes, Amazon Web Services (AWS), Amazon EC2, Heroku


MySQL, Databases, PostgreSQL, Elasticsearch, Redis, Amazon S3 (AWS S3), Datadog, MongoDB, GlusterFS


APIs, IT Support, Cloud, DevOps Engineer, Documentation, Site Reliability Engineering (SRE), Engineering Software, High Availability Disaster Recovery (HADR), Software Design, IT Operations Management (ITOM), Cloud Architecture, Software Architecture, Ubuntu Server, CI/CD Pipelines, HAProxy, Prometheus, APM, System Administration, Amazon RDS, SOP Development, Shell Scripting, Cloudflare, Quality Assurance (QA), Software Engineering, Computer Science, Elastic Load Balancers, Cloud Infrastructure, Infrastructure as Code (IaC)

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