Available for new projects

LEX
SANTIAGO

Engineer & Creator

I build AI systems, web apps, and automation tools that handle the boring stuff — so founders and small businesses can focus on what actually matters. Based in New Jersey. Currently working with Innovation Development Solutions.

See My Work Let's Talk

NJIT Engineering

lex@lexmakesit ~ zsh

➜ lexmakesit --build ai-receptionist

✓ Voice pipeline initialized

✓ GPT-4o connected

✓ Twilio webhooks active

✓ RAG knowledge base loaded

→ Handling calls 24/7...

➜ agentop --status

✓ 8 agents online

✓ LangGraph orchestration running

→ SitePlannerAgent → PageGeneratorAgent → QA

➜

Projects

Clients

24/7

AI Uptime

What I Build

Three things, done well.

AI Systems

Custom AI tools built to automate repetitive operations — receptionists, chatbots, agent pipelines, RAG-powered assistants.

Web Applications

Full-stack apps with real-time data, third-party API integrations, and interfaces that don't get in the way of the work.

Automation

Backend workflows, API orchestration, and scheduled systems that run while you sleep — no babysitting required.

Selected Work

"How can I make this easier?"

AGENTOP

AI Agent Platform

Agentop

In Dev

Multi-agent orchestration platform built on LangGraph and FastAPI. Specialist AI agents — planning, generation, QA, SEO, content — coordinated through a Next.js dashboard and WebSocket task stream. Built for production client site delivery.

LangGraph FastAPI Next.js Python WebSocket PostgreSQL

View on GitHub

Live

AI Receptionist

24/7 AI phone system handling customer inquiries, appointment scheduling, and information requests via Twilio + GPT-4o with RAG knowledge retrieval. Business owners stop missing calls.

FastAPI Twilio OpenAI GPT-4o RAG Redis PostgreSQL

Case Study

DonXera streetwear store inventory management system

Live

DonXera Inventory System

Real-time inventory management for a Florida streetwear resell store. SAP ARP + Lightspeed POS sync across multiple locations, handling 140+ SKUs with automated reconciliation.

Python Flask SAP ARP Lightspeed POS Docker PostgreSQL

View Demo

Content Manager

Content Creation Manager

WIP

End-to-end AI-powered content pipeline — ideation, scripting, scheduling, and publish coordination. Removes the manual bottleneck between idea and published post. Currently in active development.

Python FastAPI OpenAI LangGraph

In active development

Collaboration

Working with Innovation
Development Solutions

IDS is a national business infrastructure firm serving clients across all 50 states — formation, licensing, digital systems, and compliance coordinated as one platform.

I contribute to their digital and AI layer: building client-facing web applications, custom AI tools, backend automation, and scalable systems that support their distributed operation services across industries.

Visit IDS

States Served

1,000+

Systems Deployed

200+

Business Types

Scalable Systems

Client Feedback

What clients say.

"Alex built me an AI receptionist that actually works. I can focus on my clients instead of answering the phone all day. It's like having an extra pair of hands."

Maria Torres

Owner, Bella Vista Salon

"He explained everything in plain English — no tech jargon. The AI handles our after-hours calls perfectly. Simple solution, big impact."

David Kim

Operations Manager, Kim's HVAC

"We went from chaotic spreadsheets to a clean system that just works. Alexander walked me through every step. Real talk: this saved us hours every week."

Alex Martinez

Store Manager, DonXEra Streetwear

About

Hey, I'm Lex.

Lex Santiago

NJIT · New Jersey

I'm a college engineer who builds systems that think, so people don't have to stress. I grew up in a Spanglish household where clear communication wasn't always easy — now I build tech that's simple, accessible, and human.

Learning from NJIT mentors Mark Chiusano and Keith Williams, I'm building tools that connect people and ideas — not just code for the sake of it, but systems that change how people work.

Right now I'm deep in two builds: Agentop, a full AI agent orchestration platform, and a content creation manager to help creators stop drowning in workflow. Both in active development.

Let's work together

Tech Stack

FastAPI Python LangGraph OpenAI Twilio Next.js PostgreSQL Redis Docker WebSockets RAG Flask

Focus Areas

AI agent systems & LLM orchestration pipelines

Full-stack web application development

Voice AI & real-time communication systems

API integrations & backend automation

Small business digital infrastructure

LEXSANTIAGO