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@eduuser1

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Senior Backend Engineer at Mercado Pago who built payment systems handling 2.5M+ requests per minute.

Brazil

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At Mercado Pago, I designed and operated payment services handling 2.5M+ requests per minute under strict SLAs. I worked across Java, Spring Boot, and Go on AWS and GCP.

I led a three-year legacy migration impacting 175M+ users with no customer-facing impact. I also solely owned a regulatory project enabling Mercado Pago's launch as a licensed bank in Mexico.

At Mercado Pago, I built a live-issue analysis tool adopted by five engineering teams and reduced infrastructure costs by 15% by deprecating unused flows. I established observability with SLI/SLO dashboards and led incident response and post-mortem improvement cycles.

At Delivery Hero, I developed backend services for restaurant ordering across 40+ countries. Earlier, I built an Android automation SDK using the Calabash Framework that reached 50K+ downloads.

Experience

Work history, roles, and key accomplishments

Senior Java Software Engineer

PayPal US

Mar 2026 - May 2026 (2 months)

Developed and operated event-driven Java/Spring Boot services supporting large-scale buyer and merchant notification flows within PayPal's global payments infrastructure. Investigated and resolved live production issues, ensuring reliability across critical fintech systems.

Java Spring Boot Event Driven Architecture Grafana Datadog

Senior Software Engineer

Mercado Pago

Nov 2021 - Mar 2026 (4 years 4 months)

Designed and operated fintech and payments backend services handling 2.5M+ req/min under strict SLAs, built with Java, Spring Boot, and Go across AWS and GCP. Led a 3-year legacy system migration impacting 175M+ users with no customer-facing impact, and reduced infrastructure costs by 15% through flow deprecation.

Go Java Spring Boot Kotlin AWS Python GCP AWS SQS AWS SNS Redis DynamoDB BigQuery Datadog Grafana New Relic Kibana Looker Clean Architecture Hexagonal Architecture Microservices CI CD JMeter

Senior Software Engineer

Exedio Brasil (Hering)

Jan 2021 - Nov 2021 (10 months)

Built and maintained backend services for high-traffic B2B and B2C e-commerce operations using Java, Spring Boot, and Hybris. Developed REST API features for mobile applications and optimized SQL queries and cache usage to reduce response times.

Java Spring Boot JavaScript Hybris REST APIs SQL

Senior Software Developer Engineer

Delivery Hero

Oct 2018 - Jan 2021 (2 years 3 months)

Developed and operated core backend services in the Restaurant Ordering domain, supporting millions of daily orders across 40+ countries. Designed event-driven integrations using AWS SQS/SNS with async processing and resilient patterns for cross-team fault tolerance and high availability.

Go Java Kotlin Spring Boot Python Gatling AWS SQS AWS SNS Redis DynamoDB Kubernetes Docker Helm Spinnaker Event Driven Architecture CI CD JMeter

Senior SDET

Delivery Hero Germany GmbH

Jan 2017 - Oct 2018 (1 year 9 months)

Built internal automation and load-testing tooling in Java/Spring Boot to improve reliability of high-scale ordering systems.

Java Spring Boot JMeter Ruby Cucumber Angular

Engineering Roles (Condensed)

Netshoes, Avenue Code, GVDASA, Getnet, Ibrowse

Oct 2011 - Dec 2016 (5 years 2 months)

Built automation frameworks, backend utilities, and performance tooling across e-commerce, ERP, and POS systems. Designed an Android automation SDK using the Calabash Framework with 50K+ downloads.

Java Ruby Selenium Calabash JMeter