Building production systems at scale for over a decade. Currently Senior Software Engineer at UOL Group (one of Brazil's largest tech companies), previously 7+ years at Casas Bahia — Brazil's biggest retailer — delivering e-commerce platforms for global brands like HP and AOC.
- 🚀 Specialized in: Multi-tenant SaaS, e-commerce platforms, AI-integrated applications
- 🛠️ Stack: NestJS · Next.js · TypeScript · PostgreSQL · Kubernetes · Stripe · Claude API
- 📫 Reach me: geraldobl58@gmail.com
| Project | Stack | Description |
|---|---|---|
| Snap Financial | NestJS · Next.js · Claude API · Stripe | AI-powered personal finance — snap a receipt, AI extracts the data |
| Crivo SaaS | NestJS · Prisma · Keycloak · Stripe · Kong | Production-grade multi-tenant SaaS boilerplate |
| Infra Lab | K8s · ArgoCD · Helm · Prometheus · Grafana | Full GitOps platform with 4 environments and observability |
| Category | Technologies |
|---|---|
| Frontend | Next.js 15/16, React 19, TypeScript, Tailwind CSS, MUI, Styled Components |
| Backend | NestJS, Node.js, Prisma, REST APIs, PHP/Laravel |
| Database | PostgreSQL, MongoDB, Redis |
| DevOps | Docker, Kubernetes, ArgoCD, Helm, GitHub Actions, Azure DevOps |
| Auth & Payments | Keycloak, OAuth/OIDC, Stripe (subscriptions, webhooks, billing) |
| API Gateway | Kong, rate limiting, JWT validation |
| Observability | Prometheus, Grafana, Loki, OpenTelemetry |
| AI Integration | Anthropic Claude API, OpenAI |
| Testing | Jest, Vitest, Cypress, Storybook |
- UOL Group (Jan 2026 – Present) — Senior Engineer building high-traffic e-commerce dashboards with Next.js 15, MUI, and large-scale REST integrations
- Estadão (Nov 2024 – Nov 2025) — Tech Lead on WordPress → ARCXP CMS migration: 100% data integrity, 40% performance boost
- Casas Bahia / Via (Jun 2017 – Sep 2024) — 7+ years building B2B/B2C platforms for HP, AOC, and other global brands
