Gustavo Tsuji
Software Engineer (Ad Integration Team)
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolGustavo Tsuji is a seasoned software engineer with 18+ years of experience building and modernizing scalable backend systems, currently shaping ad integration at Grupo OLX from São Paulo. He combines Computer Science and Business Administration training from USP to align technical choices with measurable business outcomes, having delivered features that increased CTR by ~13-15% and conversion by ~15-25%. Gustavo has led impactful infrastructure work—migrating services to AWS Graviton to cut compute costs ~60%, lowering cache spend, and executing zero-downtime database upgrades—while championing Node.js modernization, PostgreSQL partitioning, and DevOps best practices. Comfortable across Java, Node.js, Python, AWS, Kubernetes and relational databases, he blends hands-on implementation with mentoring and peer education. Not obvious from the title: he frequently drives cost-conscious architectural changes that improve both performance and team autonomy, turning operational work into product gains.
11 years of coding experience
15 years of employment as a software developer
Bacharel Administração, Bacharel Administração at School of Economics, Business and Accounting at the University of São PauloBacharel Ciências da Computação, Bacharel Ciências da Computação at Instituto de Matemática e Estatística - Universidade de São Paulo (IME-USP)
Portuguese, English, Japanese, Spanish
Github Skills (24)
api7
telemetry6
javascript-client5
monitoring5
javascript4
distributed-tracing4
react-component2
google-api2
otel2
react2
opentelemetry2
google-maps2
maintainability2
google2
visualizer1
Programming languages (1)
Github contributions (5)
gustavotsuji/AulasDeProgramacao
Feb 2018 - Feb 2020
Contributions:21 commits, 30 pushes, 1 branch in 2 years
gustavotsuji/gustavotsuji.github.io
May 2016 - Nov 2023
Contributions:2 PRs, 50 pushes, 2 branches in 7 years 8 months
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