Alex Cortes

Senior Full Stack & AI Engineer with 7+ years of experience designing and developing scalable web platforms, distributed systems, CRM solutions, and AI-powered applications. Proven track record leading the end-to-end development of production systems serving more than 10,000 users. Experienced in building conversational AI agents, CRM automation, omnichannel communication systems, data-intensive dashboards, and third-party integrations.

Strong background in modernizing legacy applications, improving system performance, reducing technical debt, and establishing engineering standards. Skilled at collaborating with technical leadership and cross-functional teams to deliver reliable, business-critical software.

Senior Full Stack & AI Engineer at Ellyonsoft Inc. (2022-01 – Present)

Software Development Company

• Led the end-to-end architecture and development of scalable web platforms using Node.js, TypeScript, React, Next.js, Angular, PHP, MongoDB, and Redis.
• Built cloud-native features for EasyCRM using Supabase, PostgreSQL, authentication, Row Level Security, real-time subscriptions, storage, and serverless Edge Functions.
• Built omnichannel communication capabilities supporting WhatsApp Business API, Baileys, Twilio, email, real-time notifications, and customer conversation management.
• Developed AI-powered conversational agents using OpenAI APIs, prompt engineering, contextual data, configurable business rules, and automated response workflows.
• Implemented AI agents for automated customer engagement and outbound calls, including dynamic prompt generation, lead context enrichment, webhook processing, and conversation tracking.
• Integrated AI capabilities into automotive CRM workflows to qualify leads, answer product-related questions, automate follow-ups, and support appointment generation.
• Architected a Zapier-style automation platform enabling source-agnostic integrations, configurable data mapping, event routing, and communication with external systems.
• Engineered more than 100 high-performance analytics and data visualization components using optimized MongoDB queries, aggregation pipelines, indexing strategies, and Redis caching.
• Integrated marketing and advertising platforms including Meta Lead Ads, Facebook Ads, Google Ads, and campaign analytics.
• Led development and continuous improvement of a production platform serving more than 10,000 users, ensuring scalability, reliability, security, and performance.
• Implemented real-time functionality using Pusher and Socket.IO for conversations, notifications, and application events.
• Integrated AWS services including Amazon S3 and Systems Manager Parameter Store for file management, secure configuration, and cloud infrastructure.
• Improved production observability and incident diagnosis using Sentry, Datadog, structured logging, and product analytics with PostHog.
• Modernized legacy systems by introducing TypeScript, modular architectures, automated testing with Jest, security middleware, and standardized development practices.
• Implemented REST APIs, authentication and authorization, rate limiting, input sanitization, and security controls for production applications.
• Conducted rigorous pull request reviews to enforce coding standards, maintain architectural consistency, and improve code quality across the engineering team.
• Collaborated with technical leadership on system architecture, technical planning, platform modernization, and key engineering decisions.
• Supported CI/CD workflows, Docker-based environments, Git branching strategies, and automated quality controls using ESLint, Prettier, Husky, and Commitlint.

Web Application Developer at Vision Tec, S.A. de C.V

• Developed web applications and business websites using multiple programming technologies
• Designed application architecture and selected appropriate tech stacks
• Performed testing, debugging, and performance improvements
• Maintained and enhanced existing production systems

Technical Support Systems at Car One Group, S.A. de C.V

• Provided technical support for enterprise systems, applications, and infrastructure
• Administered DMS platforms (MMW32, IC2000) including configuration and user management
• Managed network environments and end-user systems across the organization
• Supported IT projects involving system deployment, upgrades, and operational improvements

Web Programmer at Alcont de Mexico, S.A. de C.V

• Developed web applications and e-commerce platforms using multiple technologies
• Implemented analytics, tracking systems, and third-party integrations
• Managed and maintained production websites ensuring performance and reliability

Bachelor of Engineering in Systems Administration in Systems Administration – Universidad Autónoma de Nuevo León (UANL)

English Language in Languages – Universidad Autónoma de Nuevo León (UANL)