Guerby Mertil

Senior Software Engineer @Fanatics

San Diego, CA, US

Architected and delivered cloud-native, event-driven platforms using Java and Spring Boot, supporting high-traffic environments with strong stability, performance, and availability.• Led the migration of legacy monoliths into modular Java microservices, enabling independent scaling, faster deployments, and improved fault isolation.• Designed high-throughput backend services for real-time event and transactional data, reducing latency by up to 80% during peak live traffic and implementing resilience patterns such as retries, rate limiting, caching, and circuit breakers.• Built secure, versioned REST APIs and backend gateways for web, mobile, and AI services, enforcing enterprise authentication and authorization standards.• Designed and deployed machine learning pipelines using AWS SageMaker and Snowflake to power personalization, predictive insights, and recommendation systems that improved engagement and retention.• Built production-grade data ingestion and feature pipelines processing event streams and transactional data to support real-time ML, analytics, and AI-driven insights.• Led development of LLM-powered intelligence and risk tooling that translated complex real-time signals into clear natural-language explanations, improving user understanding, engagement, and reducing support load.• Applied AI-driven automation to internal workflows, including planning and optimization processes, improving accuracy and reducing manual effort.• Developed Node.js services and React applications with TypeScript to deliver real-time dashboards that surfaced ML outputs and operational insights to end users.• Owned end-to-end delivery of AI-enabled features across backend, data, and frontend systems, reducing handoff friction and accelerating delivery.• Mentored engineers and contributed to architectural reviews, helping define best practices for backend, AI/ML, LLM, and full-stack systems.

West Virginia State University

Communications

West Virginia State University

Bachelor of Arts (BA)

Florida International University

Sports Communication