Hello, I'm
Enrique Mascarua
Building production-grade RAG, multi-agent and voice AI systems — not demos. 5+ years shipping LLM platforms across AWS, Azure and GCP.
About Me
I started at 18 as CTO of my own AI startup building RAG and agentic systems from scratch. Five years and four companies later, I lead a team of 6 engineers at NexOne AI, architecting financial document intelligence and conversational AI platforms. My stack: LangGraph, LangSmith, RAGAS, Snowflake, AWS, Retell AI, VAPI and Twilio SIP — focused on shipping LLMs that survive production traffic, not notebook demos.
What I Build
Three areas where I've shipped systems that survive real users and real traffic.
Production RAG & Multi-Agent
LangGraph orchestration, GraphRAG retrieval, evaluation pipelines with RAGAS and LangSmith for measurable quality.
Voice AI Systems
Real-time voice pipelines with Retell AI, VAPI and Twilio SIP. Custom TensorFlow STT for domain-specific accuracy.
LLM Observability & Cost
Tracing with LangSmith, Datadog dashboards and token-cost optimization to keep LLM features economically viable.
Experience
Sr AI Engineer
Apr 2025 – PresentNexOne AI
Leading end-to-end development of AI-driven financial document intelligence and conversational platforms. Directing a team of 6 engineers across LangGraph, Snowflake, AWS and Azure.
Gen AI / Voice AI Engineer
Dec 2024 – Apr 2025Vocal AI
Built Twilio SIP voice pipelines with custom TensorFlow STT models for automated real estate client interactions across inbound and outbound flows.
SWE / AI-ML Engineer
Jan 2024 – Nov 2024Gin Real Estate
Developed agentic AI workflows with LangChain and Snowflake for property data analysis. Integrated Meta Cloud API for WhatsApp lead automation.
Software Engineer / Prompt Engineer
Oct 2022 – Jan 2024Codey
Built Azure Functions for SWIFT payment processing. Designed prompt engineering pipelines integrated with Microsoft Dynamics CRM.
AI/ML Engineer & CTO
Jan 2020 – Jun 2022Mesurto
Co-founded and led technical development of an AI startup. Built RAG pipelines and agentic AI systems from the ground up on AWS.
Skills & Technologies
AI & LLM Engineering
Voice & Conversational AI
Cloud & DevOps
Backend & Data
Rapid Prototyping & No-code
CRM / GTM Integrations
Featured Projects
Real systems running in production — not portfolio demos.
AI Financial Document Intelligence
End-to-end agentic platform at NexOne for financial document analysis and automated reporting. Orchestrated LangGraph workflows over Snowflake with RAGAS-evaluated retrieval and LangSmith tracing.
Voice AI Pipeline (Real Estate)
Real-time voice interaction system using Twilio SIP trunking with custom TensorFlow STT and LLM-driven dialog. Handles inbound and outbound calls with natural language understanding for real estate workflows.
WhatsApp Agentic System
Conversational agent over Meta Cloud API with persistent memory and tool-use. LangGraph orchestration handles multi-turn flows, lead qualification and CRM hand-off.
EAO Agent (Agentic RAG)
Production RAG pipeline with autonomous agent orchestration for document intelligence. Multi-step reasoning over vector retrieval with explicit evaluation harness.
Open to contract & freelance — production AI systems only
Currently taking on senior RAG, voice AI and multi-agent projects. Not demos.
Let's Connect
Got a challenge that needs production AI? I'm open to senior contract roles, advisory, and interesting collaborations.
Phone
+52 5580318747Location
Merida, Yucatan, Mexico
Available for opportunities