Catalina J.

Demo profile

Backend Developer - Data Pipelines & ETL

Buenos Aires, Argentina·5+ years·Spanish / English

Bio

I turn messy data into clean, queryable databases. 5 years building ETL pipelines, data transformations, and background job processors. I love SQL, understand indexes, and know when to denormalize. Started as a data analyst, learned programming to automate my work, never stopped. My code is well-tested, my migrations are reversible, and my cron jobs have proper error handling.

Skills

Node.jsTypeScriptPostgreSQLPythonREST APIsDocker

Work style

Detail-orientedSystems thinkerGreat documentation

Portfolio (sample case studies)

Inventory Management Dashboard

Sample

Created real-time inventory system with stock alerts, purchase order automation, and multi-warehouse support.

PostgreSQLREST APIs

Authentication & Authorization Revamp

Sample

Rebuilt auth system with SSO, MFA, and granular permissions. Implemented secure session management and audit logging.

Node.jsPostgreSQL

Analytics Dashboard for B2B SaaS

Sample

Created complex reporting dashboard with custom date ranges, exports, and drill-down capabilities. Optimized queries to handle millions of events.

PostgreSQLTypeScript

Search & Filter System Optimization

Sample

Rebuilt product search with faceted filtering, autocomplete, and relevance ranking. Improved search speed by 10x using proper indexing.

PostgreSQLNode.js

Design System & Component Library

Sample

Built reusable component library with comprehensive documentation, accessibility compliance, and comprehensive testing.

TypeScript

CI/CD Pipeline & Infrastructure Automation

Sample

Set up complete CI/CD pipeline with automated testing, staging environments, and zero-downtime deployments. Reduced deploy time from 2 hours to 8 minutes.

Docker