Celso is a Dev

Overview: Full-stack engineer for a high-volume direct mail platform. Delivered features focusing on service-oriented architecture, security compliance, scalability and Hotwire.

AI-Accelerated Workflow: Pioneered team's adoption of AI-assisted development by establishing .cursor/rules and CLAUDE.md guidelines, standardizing coding patterns and significantly increasing shipping velocity.

API Integrations Ecosystem: Maintained and optimized REST API integrations, including Stripe connections for revenue tracking and Klaviyo data syncs to ensure accurate segment matching.

Scalable Export System Overhaul: Re-engineered the legacy export system using AWS S3 (Active Storage) to handle massive datasets. Replaced browser-blocking downloads with an asynchronous email delivery system.

Feature Development: Developed a Campaign "Time Machine" state management system preventing data loss, and led a massive security overhaul replacing insecure direct downloads with authenticated access paths.

Overview: Built and maintained backend services for a conversational marketing platform focused on lead generation hosted on Heroku and using React and Vanilla JS.

In-Chat Scheduling Engine: Engineered a custom React-based scheduling UI embedded within the chat widget. Completed bi-directional OAuth logic to sync Google Calendar availability in real-time.