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João Pedro

@joopedro8

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Senior Backend Engineer at PagBank PagSeguro who redesigned a payments API handling ~450M requests daily.

Brazil

Message

What I'm looking for

I’m seeking a remote senior backend role in a LATAM team, building clean, test-driven Java microservices.

At PagBank PagSeguro, I redesigned a high-availability payments API handling ~450M requests a day, using Redis caching and asynchronous Kafka processing to decouple payment flows from third-party availability. I also migrated a critical Oracle Exadata database to a 20-node Cassandra cluster, cutting infrastructure costs by 98%+ with no loss of availability.

At Sicoob Confederação, I refactored a legacy Java monolith and strengthened transaction validation, reducing the error rate from ~15% to 0.1%. I’m seeking a remote senior backend role in a LATAM team, building clean, test-driven Java microservices.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

PagBank PagSeguro

Aug 2021 - Present (5 years 2 months)

Redesigned a high-availability payments API handling ~450M requests/day using Redis caching and asynchronous Kafka processing. Migrated a core Oracle Exadata database to a 20-node Cassandra cluster, cutting infrastructure costs by 98%+ (R$59M/year).

Java Spring Boot REST APIs Redis Kafka Apache Spark Cassandra AWS Docker Kubernetes

Java Developer

Sicoob Confederação

May 2015 - Aug 2021 (6 years 3 months)

Refactored a legacy Java monolith and optimized critical banking flows, reducing transaction error rate from ~15% to 0.1% and cutting average response time by ~85%. Optimized 90% of DB2 queries using temporary tables, batch inserts, MERGE statements, index tuning, and table partitioning.

Java JBoss Websphere DB2 SQL Performance Optimization