Enmanuel – AWS, Typescript, React

A reporting hub that consolidates CRM activity (leads, appointments, deals, marketing touchpoints) into a single, self-serve dashboard.

• Owned connectors and ingestion, Serverless APIs (Lambda + API Gateway), Fargate batch jobs, Snowflake modeling/loading and data-quality checks, plus Datadog SLOs/alerting.
• Shipped the React reporting UI and partnered with stakeholders to define KPIs, drill-downs, and scheduled reports.

Cloud PMS for property managers and landlords that replaces spreadsheets with a unified workflow from listings and applicant screening to e-signing leases, collecting rent (ACH/card, dunning), and managing maintenance. Tenants and owners get self-service portals for requests, documents, and messaging.

• Stabilized core PMS services and UI end-to-end resolving SEV incidents on tenant/owner flows.
• Tuned PostgreSQL and added Redis caching to bring P25 latency down.
• Introduced a reusable Storybook component library integrated with Redux to curb UI regressions.

A system that acts as an interface between various ERP systems and the Tax Regulation Entity in the Dominican Republic (DGII). The system extracts data (invoices, credit notes) from any ERP, processes it, and sends it to the IRS for validation in compliance with local tax regulations.

• Developed and maintained the system.
• Cut accounting workload ~40 hrs/month across 100+ customers.
• Increased first-pass acceptance by adding strict schema/validation checks.
• Sped up the month-end close with live status dashboards and alerts.
• Stabilized throughput with async queues and idempotent retries.
• Owned backend & signing pipeline—Node.js/Express services.

A HIPAA-compliant patient portal enabling self-registration, e-consent, appointment scheduling, secure messaging, document/results viewing, and PHI-safe file uploads.

• Built and scaled the patient portal.
• Moved intake off paper/phone to the portal.
• Improved clinician turnaround and reduced no-shows.
• Passed security reviews with zero critical findings.
• Kept P95 low and costs predictable with Cloud Run + Redis.
• Owned backend on GCP (NestJS/Cloud Run, Cloud SQL, Pub/Sub/Functions).
• Designed data model & APIs.
• Implemented PHI-safe storage (pre-signed URLs, lifecycle), RBAC & audit logs, KMS encryption & Secret Manager.
• Set up dashboards/alerts, handled on-call, and partnered with clinicians to refine workflows.

A distributed web-crawler that used Google Custom Search + OpenAI to identify the correct domain, then Puppeteer to scrape contact data. Express API service queues, monitors, and retrieves crawl jobs end-to-end, while MongoDB Atlas stores raw HTML and ensures PII safety.

• Drove ~30% more qualified leads by adding domain-discovery + confidence scoring and cutting false positives ~85%.
• Reduced cost per lead ~22% via de-duplication, precision targeting, and automated enrichment