Software Engineer building interfaces that run in production.
Fintech, high-availability systems, applied AI — at andrey.dev.br.
- Banking platform — three years on a fintech with 1M+ monthly users. Incremental legacy migration with feature flags in real environments and end-to-end observability.
- Performance — took a high-traffic acquisition platform from Lighthouse 28 to 95+, LCP under 1.2s in production.
- AI automation flows — LLM pipelines in production with monitoring dashboards, retry queues, cost-per-run tracked. AI that ships results, not black boxes.
- Design systems — semantic tokens, accessible-by-default components, docs PMs read without scheduling a meeting.
PR is context, not just diff. Production-grade from the first commit: TypeScript strict, feature flags on risky changes, runbooks before deploy. Architecture the next dev can inherit without asking me.