Sergio F.

4 Elements Music

Senior DevOps Engineer

• Website
• Jun, 2024 - Sep, 2024
• United States

• Architected a new platform to run a containerized Python/Django application on AWS using ECS Fargate.
• Implemented all infrastructure resources on AWS and CloudFlare using Terraform and Terraform Cloud.
• Implemented CloudFlare to leverage the DNS and security services to protect client's publicly exposed applications.
• Implemented a complete CI/CD pipeline using GitHub Actions and CodeDeploy to ship software faster on top of ECS Fargate.

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CoinList

Senior Infrastructure Engineer

• Website
• Jun, 2023 - Jun, 2024
• United States

• Massive savings on infrastructure costs (approximately 87.5% decrease) have been realized since the containerized approach allowed them to use more minor container instances (compared to the previously used EC2 instances) able to grow and shrink (autoscale) when needed.
• Scaling the main application (Compliance) in the old architecture took approximately 45 minutes and was error-prone. The modernization decreased this time to approximately 5 minutes and increased the confidence level in the deployment process.
• Implementing CI/CD pipelines has significantly standardized and accelerated CoinList's software delivery process, enhancing the efficiency of its Engineering team and streamlining its operations, making it more agile and responsive.
• The new Infrastructure was also faster than the previous one (EC2)—CoinList could process more requests using fewer hardware resources, contributing to massive savings.

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Caylent

Cloud Architect

• Website
• Jan, 2022 - Jul, 2023
• United States

• During my time at Caylent, I successfully delivered projects for five clients: EVgo, Art of Problem Solving (AoPS), Whatnot, Web 3 Pro, and TeleTracking.
• 1) EVgo: Migrated workloads from Rackspace to AWS using the lift-and-reshape method. See more details about this project at https://sergiofrancisco.com/case-coinlist
• 2) AoPS: Developed a Proof of Concept (PoC) to demonstrate how the client's application could be modernized using ECS Fargate, CircleCI, and GitHub. See more details about this project at https://sergiofrancisco.com/case-art-of-problem-solving
• 3) Whatnot: Deployed Sagemaker training pipelines and model-serving infrastructure to support the client's migration of their Recommendation Engine from SpellML, enhancing their MLOps practice. See more details about this project at https://sergiofrancisco.com/case-whatnot
• 4) Web3 Pro: Implemented AWS Control Tower for Terraform to set up and customize new accounts in compliance with the client's organization's security standards. See more details about this project at https://sergiofrancisco.com/case-web3-pro
• 5) TeleTracking: Designed a hub-and-spoke networking architecture that centralized ingress and egress networking access across three regions (the US and Europe) using services such as Transit Gateway, AWS WAF, and Load Balancers. See more at https://sergiofrancisco.com/case-teletracking

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ETUS Media Holding

Lead Site Reliability Engineer

• Website
• Feb, 2020 - Jun, 2021
• Brazil

• Re-architected and optimized the infrastructure of the company's main website and improved its reliability to handle thousands of simultaneous visitors.
• Kept uptime SLA 99.99% during 2020.
• The team obtained the Associate Cloud Engineer Certification from GCP in the same quarter.
• Most applications were modernized by adopting containers and moved to run on top of GCP Cloud Run with optimal CI/CD pipelines that enhanced software delivery.
• Implemented an Observability solution using Google Cloud Operations Suite.

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Dock

Infrastructure Architect

• Website
• Apr, 2017 - Jul, 2019
• Brazil

• Architected and deployed infrastructure, using Terraform and Ansible, for a PCI-certified system that handled thousands of financial transactions daily and a microservices infrastructure for a bunch of RESTFul APIs developed in Java/Spring.
• Architected and implemented, using Terraform and Ansible, an AWS multi-account infrastructure across two regions with multiple VPCs that used a broad range of AWS services such as EC2, S3, Route53, RDS, ElastiCache, SQS, IAM, CloudTrail, Config, VPNs, Direct Connect, etc.
• Technically led a team that migrated several systems and terabytes of data from a traditional data center to the AWS cloud.
• Developed the company's 1st Continuous Delivery (CD) pipeline, which deployed static websites on AWS using S3 + CloudFront. This solution allowed the company to perform more deployments without downtime, at any time, and without manual intervention.
• Deployed a GitLab autoscaling solution to automatically spin up and down Amazon EC2 Spot instances to process builds immediately and have a cost-effective, flexible/scalable solution.

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Dock

Senior Infrastructure Engineer

• Website
• Sep, 2016 - Apr, 2017
• Brazil

• Tuned several Java application servers (running Apache Tomcat 6/7), improving their performance after tweaking Tomcat settings (HTTP, JDBC, JVM, Garbage Collection). This optimization reduced database pool consumption by approximately 84%.

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Dock

Infrastructure Engineer

• Website
• Oct, 2014 - Sep, 2016
• Brazil

• Managed over 100+ Linux (Red Hat and CentOS) servers running different technologies, such as MySQL 5.0+, Apache Tomcat 6/7, Apache Httpd 2, HAProxy, etc., geographically distributed in two data centers in Sao Paulo and Rio de Janeiro.
• Deployed required networking services to achieve PCI-DSS certification, such as OpenLDAP, Logs management solution (centralized Rsyslog), and NTP using Puppet.

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