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Ralph Santiago
Ralph Santiago

Senior Full-Stack AI Engineer

Actively looking · Member since 31 Aug 2026
Message
Location
Baliuag, Philippines
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Part Time, Contract, Freelance, Temporary
Experience level
Senior

About

Professional summary

I am a Senior Full-Stack AI Engineer with more than nine years of experience designing and delivering scalable software products across AI engineering, backend development, frontend applications, and mobile development.

I build production-grade AI-powered applications using large language models, retrieval-augmented generation, AI agents, LangChain, LangGraph, OpenAI APIs, embeddings, vector search, and cloud AI platforms such as Amazon Bedrock.

My backend expertise includes Python, TypeScript, Node.js, FastAPI, Django, Flask, NestJS, .NET, Spring Boot, REST APIs, GraphQL, gRPC, microservices, event-driven architecture, and distributed systems.

I develop end-to-end web and mobile experiences with React, Next.js, React Native, Flutter, and modern frontend practices. I focus on responsive interfaces, reliable API integrations, performance optimization, and maintainable component architectures.

I have strong experience with AWS, Docker, Kubernetes, Terraform, CI/CD, GitHub Actions, PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch, and vector databases. I prioritize system design, reliability, observability, security, scalability, and cost-efficient engineering.

Throughout my career, I have supported high-volume SaaS and enterprise systems, improved API latency and application performance, built AI retrieval pipelines at scale, and collaborated effectively in remote and distributed engineering teams.

Notice period: Immediately

Skills

40 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Full-Stack AI Engineer CI&T

Architected and delivered production-grade AI-powered applications using Python, TypeScript, LLMs, RAG, LangGraph, OpenAI API, and AWS. Reduced manual workflows by 35% while building scalable backend and AI services handling more than 500,000 API requests per month.

Built end-to-end web and mobile AI experiences using React, Next.js, React Native, and TypeScript, reducing feature delivery time by 25%. Optimized PostgreSQL, Redis, vector search, and retrieval pipelines, improving p95 API latency by 40% and AI response relevance by 30%.

Senior Software Engineer / AI Engineer Ingenuity Software

Designed and developed scalable Python and TypeScript microservices for SaaS applications supporting more than 100,000 monthly active users. Integrated LLMs, RAG, LangChain, OpenAI API, and Amazon Bedrock into production systems, reducing manual processing effort by 30%.

Built document-processing, embedding, and vector-search pipelines handling more than one million indexed records for context-aware AI applications. Optimized PostgreSQL, Redis, and API services, reducing average backend response times by 40% and improving system reliability.

Full-Stack Software Engineer WillowTree

Developed full-stack web and mobile applications with TypeScript, React, Node.js, React Native, and REST APIs, supporting more than 50,000 monthly users. Built reusable cross-platform mobile capabilities that reduced duplicated iOS and Android development effort by approximately 35%.

Improved application performance through frontend optimization, API enhancements, database tuning, and caching, reducing key page-load times by 30%. Transitioned successfully to a fully remote workflow during the COVID-19 pandemic using CI/CD, documentation, and asynchronous collaboration.

Software Engineer Exist Software Labs

Developed enterprise web applications and backend services using C#, .NET, JavaScript, SQL, Node.js, and React, supporting more than 10,000 end users. Designed REST APIs, database schemas, and scalable business logic for enterprise applications.

Optimized SQL queries and backend workflows, improving critical application performance by 25%. Built reusable frontend components and automated testing practices, reducing recurring development effort by 20% while improving application quality.

Education

Learning history

Fernandez College of Arts and Technology

B.S., Computer Science

Focused on software development, computer science fundamentals, programming, database systems, web development, and application development.

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