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Samuel Yamaguchi

@samuelyamaguchi

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Senior PHP Developer at Terabyteshop who cut p75 latency by 90% through platform migration.

Brazil

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At Terabyteshop, I completed the migration from PHP 5.6 to 8.5 and MySQL 5.7 to 8.0, reducing p75 latency by 90% and reducing AWS infrastructure costs through optimization.

I also migrated the platform from VPS to a distributed AWS architecture using Beanstalk, Docker, Aurora RDS, and S3. I added horizontal scalability with load balancing and automated ERP workflows with AWS SQS.

At Terabyteshop, I integrated payment gateways including MercadoPago, NuPay, and PagSeguro, as well as ERP and logistics connectors. A Redis/Valkey cache layer reduced database queries and improved response latency.

Earlier, I developed Laravel APIs and AngularJS interfaces at Ciclo2 Tecnologia, and developed and supported Paranacidade's municipal Transparency Portal as a Software Development Intern. I work across backend and frontend development, infrastructure, and observability.

Experience

Work history, roles, and key accomplishments

Senior PHP Developer

Terabyteshop

Jun 2019 - May 2026 (6 years 11 months)

Led migration from PHP 5.6 to 8.5 and MySQL 5.7 to 8.0, reducing p75 latency by 90%. Migrated infrastructure to AWS with Beanstalk, Docker, and Aurora RDS, and automated ERP workflows via SQS.

PHP MySQL AWS Beanstalk Docker Aurora RDS S3 Amazon SQS Redis Cloudwatch MercadoLibre NuPay PagSeguro Bling Intelipost Frete Rápido

PHP Developer

Econet Editora Empresarial

Sep 2017 - May 2019 (1 year 8 months)

Developed projects and simulators using native PHP and Laravel, with responsive frontends in React, Vue.js, and AngularJS. Stabilized legacy PHP 5.x systems and improved data modeling and queries with MySQL.

PHP Laravel React Vue.Js AngularJS MySQL

Web Developer

Ciclo2 Tecnologia

Mar 2015 - Aug 2017 (2 years 5 months)

Built RESTful APIs using Laravel and implemented photo processing with OCR (tesseract). Developed dynamic interfaces with AngularJS and managed Linux VPS infrastructure, deployment, and monitoring.

Laravel REST APIs OCR Tesseract AngularJS Linux VPS Deployment Monitoring

Software Development Intern

Paranacidade

Mar 2013 - Feb 2015 (1 year 11 months)

Developed and supported the municipal Transparency Portal, ensuring public access to government data per transparency legislation. Maintained jQuery interfaces and native PHP backend with bug fixes and iterative improvements.

PHP jQuery Web Development Transparency Portal