Backend & cloud engineer from Colombia. I build payment and fintech infrastructure: crypto on/off-ramps, custody integrations, multi-tenant APIs and the Kubernetes/AWS platform they run on.
- 🏦 Now: engineering at Kravata, a stablecoin on/off-ramp platform, across services, infrastructure and cost.
- 🧾 Before: electronic invoicing (Colombian DIAN) and POS integrations for restaurants at Machinesoft.
- 🌎 Open to remote, part-time contracts. Spanish (native) · English.
- Payments correctness: idempotency keys, provider reconciliation, webhooks, outbox pattern, ledger consistency.
- Integrations: custody and payment providers (BitGo, Circle, Fireblocks), Stellar, bank cash-out rails, KYC/KYT flows.
- Platform: Kubernetes (EKS and self-managed), PostgreSQL + PgBouncer, API Gateway, Cloudflare, Keycloak, GitHub Actions; cut AWS spend ~50% by re-architecting environments.
- Multi-tenant SaaS: schema-per-tenant migrations, provider-agnostic core with per-tenant business strategies over gRPC.
Python Django FastAPI gRPC · Java · C#/.NET · PHP/Laravel · TypeScript Vue Angular · Flutter/Dart
PostgreSQL MongoDB Redis RabbitMQ · AWS Kubernetes Docker Cloudflare GCP
| Project | What it shows |
|---|---|
| idempotent-payments-api | Retry-safe payments: idempotency keys, atomic phases, no double charge even when the provider times out after charging. FastAPI + PostgreSQL. |
| voxesite | AI-assisted website builder: typed JSON blocks edited by drag & drop, LLM prompts or voice; pages from a URL or screenshot; real-time Yjs collaboration. Nuxt 4 + Express + PostgreSQL. |
| reconciliation-worker | Provider reconciliation: guarded auto-fixes, discrepancy lifecycle, leased jobs with SKIP LOCKED. PostgreSQL. |
| tiktok-live-aoe2 | Real-time event pipeline: TikTok Live → Socket.IO hub → bots training units in Age of Empires II, plus an OBS overlay. |
| binance-candles-collector | Market-data ingestion: Binance futures candlesticks into PostgreSQL, idempotent upserts, one parametrized collector. |
| firebase-raffle | Realtime raffle: Vue 3 + Firestore, server-side reveal in Cloud Functions, security rules tests, offline emulator demo. |
| woo-delivery-lat | WordPress/WooCommerce plugin for multi-branch restaurant delivery: KML coverage zones, store pickup, order notifications. |