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Bobby Santiago

Senior Rails Engineer | AI Integration Specialist

Los Angeles, CA | me@bobbysantiago.com | GitHub: bullrico | Twitter: @bsantidev

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Professional Summary

Rails developer since 2006, now experimenting with AI integration and machine learning systems. Since 2022, I’ve been building intelligent applications using LLMs, FastAPI, and RAG architectures, combining my deep Ruby on Rails expertise with modern AI technologies. Currently developing an AI infrastructure platform that leverages both Rails backends and Python-based ML services.

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Core Competencies

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AI Engineering & Python

LLM Integration & RAG Systems - Production deployments with GPT-4, Claude, and open-source models

FastAPI Microservices - High-performance APIs handling 1000+ req/s with streaming support

Vector Databases & ML Ops - Pinecone, Weaviate, model fine-tuning, and GPU optimization

Python Ecosystem - PyTorch, LangChain, Hugging Face, scikit-learn, pandas

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Ruby on Rails Expertise

Production Experience - Rails 1 through 8, from startups to enterprise scale

Full-Stack Development - RESTful APIs, GraphQL, real-time features, background jobs

Performance & Scale - Database optimization, caching strategies, microservices architecture

Modern Rails Stack - PostgreSQL, Redis, Sidekiq, RSpec, Hotwire, Stimulus

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Professional Experience

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Founder & AI Platform Architect

Stealth AI Infrastructure Startup | June 2022 - Present
  • Architecting intelligent LLM routing platform with advanced features beyond traditional API gateways
  • Building FastAPI-based gateway on GPU infrastructure for AI-powered routing decisions
  • Implementing sophisticated routing: priority-based pools, health monitoring, latency tracking, cost optimization
  • Developing multi-tier architecture with Rails backend for business logic and analytics
  • Creating intelligent failover systems with circuit breakers and automatic fallback chains
  • Implementing multi-level caching and full SSE streaming support with token counting

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Senior Software Engineer

SurveyMonkey | June 2016 - June 2022
  • Built NLP-powered response analysis system processing millions of survey responses
  • Implemented automated survey response tagging and categorization system
  • Developed real-time data processing pipeline with sub-second query performance
  • Created advanced analytics dashboards for customer experience insights
  • Led technical architecture for SurveyMonkey CX platform launch
  • Integrated enterprise Salesforce instances with real-time data synchronization

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Senior Software Engineer

chideo.com | August 2014 - June 2016
  • Led Ruby on Rails application redesign for improved performance and scalability
  • Designed RESTful API endpoints enabling seamless third-party integrations
  • Implemented containerization and CI/CD pipelines

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Software Developer

Seso Media LLC / A Hundred Years | February 2013 - August 2014
  • Engineered full-stack web applications for clients including TED Ed and The Smithsonian
  • Developed backend APIs and frontend interfaces for data-driven web experiences

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Earlier Experience

Front-end Developer | BlueLeaf | February 2012 - April 2012
  • Developed frontend components for a financial analytics platform that processes and visualizes complex financial data
  • Created interactive data visualization dashboards for financial advisors
Front-end Developer / Lead Designer | Pathable, Inc. | June 2011 - November 2011
  • Led frontend development for a community and event management platform handling high-volume user data
  • Engineered and implemented a complete UI redesign
Front-end Developer | Dynamo | June 2010 - December 2010
  • Utilized Ruby on Rails and JavaScript frameworks to build responsive frontend interfaces
UI Designer / Front-end Developer | Savvy Apps | January 2009 - December 2009
  • Built highly scalable social applications reaching 1.5M daily users across 12 languages
Full-stack Ruby on Rails Developer/Designer | Sebesta Enterprises | January 2007 - January 2009
  • Designed and implemented a full-stack social networking application with real-time data synchronization
  • Created scalable database architecture and integrated payment processing APIs

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Technical Skills

AI/ML Technologies: LangChain, Hugging Face, OpenAI API, Anthropic Claude, Llama, BERT, GPT-4, PyTorch
Vector Databases: Pinecone, Weaviate, Chroma, pgvector
Languages: Python, Ruby, JavaScript, SQL
Frameworks: FastAPI, Flask, Ruby on Rails, React, Next.js
Infrastructure: Docker, Kubernetes, AWS, Runpod, Railway

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Education

Bachelor of Science in Electrical Engineering
University of Massachusetts, Amherst
Field of Specialization: Telecommunications | Honors: Dean’s List