Rafael Pereira
AvailableBackend Engineer — Node.js, Postgres, AWS
About
Backend engineer with 4 years building production APIs for fintech and SaaS. I design schema-first, ship behind feature flags, and care a lot about observability. Comfortable across the full stack of Node/TypeScript + Postgres + AWS, with deep experience scaling payment-handling services.
Skills & Expertise
Work History
Payments API rebuild
January 2026Decomposed a Node monolith handling payments into a small set of services. Added idempotency keys, structured audit logging, and OpenTelemetry tracing.
Postgres performance audit
November 2025Full performance audit of a 400GB Postgres cluster. Re-designed key indexes, added partial indexes for hot paths, introduced pgBouncer.
AWS multi-region rollout
August 2025Terraform-driven multi-region rollout for a SaaS API. Designed the read-replica topology and the cross-region failover runbook.
Reviews (19)
Felix M. · ChainVault GmbH
January 2026
“Rafael found a subtle race condition in our payments service that our internal team had missed. His write-up was detailed, well-structured, and genuinely educational.”
Tom K. · LaunchFast Pte.
November 2025
“We hired Rafael to design and ship our payments backend. He was honest about what he found in his own code — flagged two issues he'd introduced and fixed them before delivery. That level of integrity is rare.”
Aisha N. · DataRoute BV
September 2025
“Strong technical skills and thorough process. Rafael took slightly longer than estimated, but communicated proactively about the delay and the extra time produced a more thorough deliverable.”
Track record
Member since October 2023