Ernesto Galdamez

Led development of an enterprise-grade integration platform connecting Procore and Sage Intacct, automating bidirectional sync of 8 financial entity types (invoices, POs, contracts, payment applications, change orders) across active construction projects. Implemented MD5 checksum delta detection and a multi-stage approval pipeline, reducing API calls by 95% and cutting sync execution time from 45+ minutes to under 5 minutes. Designed an event-driven architecture with 13 single-responsibility services, a Redis-backed job state machine, and concurrent-safe OAuth 2.0 token management across both ERP systems. Built a zero-downtime GitHub Actions CI/CD pipeline with automated health-check gates and uptime monitoring. Reduced manual data entry by 90%+ through fuzzy matching, retry logic, and a four-table audit trail (historical snapshots, migration executions, change queue, API logs). Led and mentored a team of software engineers, providing technical direction, code reviews, and architecture guidance across multiple concurrent projects.

Built and scaled a full-stack construction estimation platform (Laravel 8 API + Vue 2 SPA) handling the complete quote lifecycle: opportunity intake, multi-variable cost calculation (construction, FF&E, AV/IT, permits, CM fees, contingency, PM markup, rebates), UNIFORMAT-compliant hierarchical cost exports, and change orders. Scaled the API to 150+ endpoints with a deep service and model layer maintained across hundreds of schema migrations. Designed and maintained integrations with 8+ external platforms (Salesforce, Procore, Wrike, Google Drive/Sheets, Sage Intacct, Notion, Aspose, Make.com). Implemented an AI-powered estimate analysis pipeline using Anthropic Claude with configurable prompt management, enabling stakeholders to update model behavior without code deployments. Architected a dual-auth API surface (OAuth 2.0 for the internal SPA + API-key endpoints for third-party consumers). Configured automated cloud backups eliminating manual backup operations entirely.

Designed and shipped a flagship multi-industry SaaS platform (Operators Hub) on Laravel 10 / PHP 8.1 — a job marketplace serving aviation, wildland fire, and heavy equipment operators across 120+ REST endpoints, 38 controllers, and 33 Eloquent models. Architected a polymorphic profile system for 6 industry verticals with zero table duplication using Laravel morphTo() relationships. Implemented a five-layer authorization stack (RBAC + Sanctum token ability scoping + IP whitelist + time-of-day windows + model policies) and hardened all responses with production OWASP security headers. Built a PHP-FPM-safe real-time chat system using SSE with Last-Event-ID resumption — no WebSockets or message broker required. Integrated the full Stripe billing stack (Products, Prices, PaymentIntents, Subscriptions) with cryptographic webhook signature verification. Led a team of developers across over 30 projects with a 99% delivery success rate; automated build and deployment workflows using Jenkins, reducing manual intervention by 80%.

Led the transition to a microservices architecture, improving system scalability and performance by 30%. Designed and implemented high-efficiency RESTful APIs, reducing response times by 50%. Applied best practices in software development, resulting in a 60% reduction in critical bugs and an overall improvement in code quality. Collaborated with cross-functional teams to optimize backend and frontend development.

Oversaw and contributed to the development of 'Millas para el Retiro,' a mobile application available on Android and iOS, enabling automated retirement savings through various modalities. Managed high-level project scopes and feature development, ensuring seamless integration with third-party APIs. The application processed over 100K monetary transactions daily, providing users the ability to save for retirement through automated deductions, marketplace purchases, and cashback rewards from partner stores like Amazon and Cinépolis. Led the implementation of new features, collaborating with stakeholders to align business objectives and enhance user experience.