yuri@log:~$

// software engineer · distributed systems · payments

yuri

Event-driven Go and Java microservices for payment processing at Mercado Pago, 20M+ transactions a day. Fascinated by backend and distributed systems.

  • São Paulo / Santos, BR
tail ~/loglast 4
  1. jobjoined Mercado Livre (Mercado Pago)
  2. ossspring-cloud-gateway#4128 merged
  3. jobjoined KG Sorensen
  4. jobjoined Clear Cloud Software

01experience

~3 yrs
  1. 2026-04 → now

    Software Engineer@ Mercado Livre (Mercado Pago)

    • Payment processing and clearing at Mercado Pago, one of Latin America’s largest payment acquirers (US$ 100B+ in payment volume per quarter).
    • Built a Visa simulator for E2E testing: certification cycles went from ~24 hours to a few minutes (>99% less). Adopted by all 5 clearing teams (~50 engineers) and used to certify 3+ business initiatives.
    • Go and Java microservices with hexagonal and clean architecture, backed by E2E test suites, guarding transaction integrity on critical flows.
    • Circuit breakers, rate limiting and idempotency guarantees against cascading failures and duplicate transactions. Owned mission-critical production releases.
    • On call for payment processing and clearing: production incidents traced to root cause with Datadog (APM, tracing, logs, monitors) and Grafana.
  2. 2025-09 → 2026-04

    Software Engineer@ KG Sorensen

    • Led end-to-end development of KG CALL, an in-house CRM (Java 21, Spring Boot, JPA, clean architecture), saving R$ 36,000 a year.
    • Observability with Prometheus, Grafana and Micrometer (p95/p99, Slack alerts). Keycloak IAM with RBAC across Spring Security and React (PKCE).
    • Tested with JUnit 5, Mockito and BDD. Shipped to AWS (ECS, RDS PostgreSQL, S3) through GitHub Actions CI/CD.
  3. 2023-11 → 2025-08

    Full Stack Developer@ Clear Cloud Software

    • Remote: custom backend and web systems for international clients.
    • Caching for the mobile product listing: ~275 ms down to ~7 ms (~40× faster).
    • REST APIs in Spring Boot and Ruby on Rails, shipped as Docker containers on AWS EC2 behind Nginx with Certbot TLS.

02open source

1 merged · 1 repo

03logs

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