Mauricio Herrejon
Mauricio Herrejon

Data Analyst

Open to offers · Member since 22 Oct 2026
Location
Morelia, Mexico
Desired salary
Unspecified
Work preference
Remote Only / Full Time
Experience level
Mid

About

Professional summary

I am a data analyst and SaaS founder focused on making business data accurate, understandable, and useful for decision-making. I work with SQL, PostgreSQL, data modeling, dashboards, reporting, and product metrics.

I founded and built Milo, a subscription SaaS platform for local businesses. I own the product data end to end, from the PostgreSQL schema and business rules to dashboards that help non-technical owners understand customer feedback and usage.

I have designed a PostgreSQL data model with 29 tables and more than 60 PL/pgSQL functions. I use row-level security, versioned migrations, transaction-based testing, and database-level validation rules to protect data quality and isolate customer data.

I identified a real visit-fraud case in production data and implemented controls including NFC chip counters, daily visit limits, phone validation, and append-only movement histories. I also define and track metrics such as scans, completion rate, dashboard usage, and repurchase.

My background includes logistics, inventory coordination, biological-sample data management, and archival catalog digitization. I bring a research-oriented approach from my History degree and continue developing my technical skills through a B.S. in Artificial Intelligence Engineering.

I am comfortable working remotely across Americas time zones and collaborating through documented processes, Git-based workflows, and AI-assisted development tools. I am interested in data analyst roles involving product data, operations, reporting, SQL, and business intelligence.

Skills

20 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Data Stores

Development

Experience

Career history

Founder & Developer Milo

Founded and built Milo, an NFC loyalty and appointment-booking SaaS for local businesses. Developed Milo Fanatic, an NFC digital loyalty card product, and Milo Agenda, an online booking product with WhatsApp reminders. The platform is in production with a barbershop, a clinical laboratory, and a dental office.

Designed the PostgreSQL and Supabase data model with 29 tables and more than 60 PL/pgSQL functions that implement plan limits, usage rules, and core business logic. Implemented row-level security to isolate each business's data.

Built custom dashboards for non-technical owners to review customer satisfaction and defined product metrics including scans, completion rate, dashboard usage, and repurchase. Detected visit fraud in production data and implemented database rules using NFC chip counters, one visit per day, phone validation, and append-only movement history.

Maintains 48 versioned migrations and tests each migration in rolled-back transactions before production deployment.

Logistics & Data Management Analyst, Biological Samples (RPBI) Grupo Micro-Tec

Performs quality control and traceability management for biological sample records used in diagnostic studies. Handles large volumes of operational data while maintaining accurate records.

Prepares inventory reporting and supports operations and supplier coordination under biosafety and medical-waste (RPBI) protocols.

Operations & Inventory Coordinator Grupo Abarrotes Azteca

Managed inventory control using the FIFO method, including data entry and updates in management systems.

Supported operational coordination, inventory reporting, and supplier relations.

Intern Faculty of History Library, Universidad Michoacana de San Nicolás de Hidalgo

Participated in migrating the library's physical document catalog to a website hosted on the faculty's server, enabling online search access.

Supported digitization and archival description of records using ISAD(G) standards. Verified document provenance to help ensure that the online catalog was reliable.

Education

Learning history

Hybridge (RVOE 2960)

B.S., Artificial Intelligence Engineering

Currently pursuing a Bachelor of Science in Artificial Intelligence Engineering. GPA: 9.0/10.

Universidad Michoacana de San Nicolás de Hidalgo

B.A., History

Completed a Bachelor of Arts in History.

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