Open to opportunities

Ralph Santiago

@ralphsantiago

I build scalable AI-powered web, mobile, and backend products using LLMs, RAG, and cloud platforms.

At CI&T, I architected production-grade AI applications with Python, TypeScript, LLMs, RAG, LangGraph, OpenAI API, and AWS, reducing manual workflows by 35% and supporting 500K+ API requests per month.

I've also built SaaS microservices, document-processing and vector-search pipelines for 1M+ indexed records at Ingenuity Software, plus web and mobile products at WillowTree and Exist Software Labs. Across these roles, I improve performance, reliability, and delivery through scalable APIs, React and React Native interfaces, PostgreSQL and Redis optimization, CI/CD, and cloud-native system design.

Experience

Work history, roles, and key accomplishments

Senior Full-Stack AI Engineer

CI&T

Apr 2024 - Jun 2026 (2 years 2 months)

Architected and delivered production-grade AI-powered applications using Python, TypeScript, LLMs, RAG, LangGraph, OpenAI API, and AWS, reducing manual workflows by 35%. Designed scalable backend and AI services supporting 500K+ API requests per month, with emphasis on reliability, observability, and cost optimization.

Python TypeScript LLM RAG LangGraph OpenAI API AWS React Next.js React Native PostgreSQL Redis Vector Search

Senior Software Engineer / AI Engineer

Ingenuity Software

Jan 2022 - Feb 2024 (2 years 1 month)

Designed and developed scalable Python and TypeScript microservices supporting SaaS applications with 100K+ monthly active users. Integrated LLMs, RAG, LangChain, OpenAI API, and Amazon Bedrock into production systems, reducing manual processing effort by 30%.

Python TypeScript Microservices LLM RAG Lang Chain OpenAI API PostgreSQL Redis Vector Search Document Processing Embeddings

Full-Stack Software Engineer

WillowTree

Aug 2019 - Dec 2021 (2 years 4 months)

Developed full-stack web and mobile applications using TypeScript, React, Node.js, React Native, and REST APIs, supporting 50K+ monthly users. Built reusable cross-platform mobile features with React Native, reducing duplicated iOS/Android development effort by approximately 35%.

TypeScript React Node.Js Development React Native REST APIs Caching CI CD

Software Engineer

Exist Software Labs

Apr 2017 - Jun 2019 (2 years 2 months)

Developed enterprise web applications and backend services using C#, .NET, JavaScript, SQL, Node.js, and React, supporting 10K+ end users. Designed and implemented REST APIs, database schemas, and business logic for scalable enterprise applications.

C#.NET JavaScript SQL Node React REST APIs Database Design Query Optimization

Education

Degrees, certifications, and relevant coursework

Fernandez College of Arts and Technology

Bachelor of Science, Computer Science

2013 - 2017

Focused on software development, computer science fundamentals, programming, database systems, web development, and application development, providing a strong foundation for a career in software engineering.