Guilherme Zarelli
Principal Software Engineer at PicPay
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolGuilherme Zarelli is a Principal Software Engineer based in São Paulo with over a decade of experience designing resilient, high-availability systems for fintech, payments, and logistics. He combines deep expertise in distributed systems, event-driven design, and cloud platforms (AWS/GCP) with hands-on DevOps and observability practices to drive measurable reliability and scalability improvements. At PicPay he leads credit transaction architecture and shepherds resilience initiatives that cut MTTR and improve cross-service traceability. Previously he guided large migrations and cost-optimization programs at Magazine Luiza’s Luizalabs, pairing technical leadership with clear operational standards. Known for mentoring and shaping engineering culture, he emphasizes aligning technical decisions to business outcomes and lifting team capabilities. Colleagues describe him as relentlessly curious and challenge-driven, turning complex operational needs into pragmatic, production-ready platforms.
9 years of coding experience
10 years of employment as a software developer
Nível Superior em Sistemas para Internet Computer Programming, Nível Superior em Sistemas para Internet Computer Programming at Centro Universitário Barão de MauáPós-Graduação em desenvolvimento de Sistemas WEB Information Technology, Pós-Graduação em desenvolvimento de Sistemas WEB Information Technology at Universidade de Ribeirão PretoTécnico em Eletrônica Electrical/Electronics Maintenance and Repair Technology, Técnico em Eletrônica Electrical/Electronics Maintenance and Repair Technology at Etec José Martimiano da Silva
Portuguese, English
Stackoverflow
91reputation
3kreached
2answers
2questions
Github Skills (72)
projeto10
jacoco10
architecture9
modular9
clean-architecture9
archetype9
coveralls9
spring9
java9
spring-boot9
gradle9
log-in9
mongodb9
api8
maven8
Programming languages (5)
Github contributions (5)
gbzarelli/ValidarGerarApp
Nov 2016 - May 2019
Este aplicativo foi destinado a realização de validações e gerações de documentos; O Aplicativo conta com as funcionalidades de gerar e validar os seguintes documentos: - CNPJ - CPF - RENAVAM - PIS - CARTÃO DE CREDITO IMPORTANTE: Nosso gerador tem como intenção ajudar estudantes, programadores, analistas e testadores a gerar documentos válidos. Normalmente necessários parar testar seus softwares em desenvolvimento. A má utilização dos dados aqui gerados é de total responsabilidade do usuário. Os números são gerados de forma aleatória, respeitando as regras de criação de cada documento.
Contributions:12 pushes, 3 branches, 1 tag in 2 years 6 months
cpf-cnpjajudarriaem-desenvolvimentoaleat
gbzarelli/VelocimetroAlerta
Oct 2016 - Dec 2019
Contributions:4 releases, 33 pushes, 4 branches in 3 years 2 months
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