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Mayerlin Becerra Dos Santos

Product Manager × Builder

I build digital products end to end.

Alongside my Product Management experience, I design and develop digital products, web applications, APIs and automations, working across data modeling, business logic, frontend, integrations and deployment.

Product
Full Stack
Automation
AI

Product + Technology

Understanding the problem and building the solution.

My technical experience complements my work in product. Building complete applications has given me hands-on experience with architecture, data, APIs, security, integrations, infrastructure and automation, while helping me better assess feasibility and technical trade-offs in product decisions.

End-to-end

Product→Code→Production

Technical capabilities

01 — 06

From frontend to production

I work across different layers of a product depending on the needs of each solution.

01

Frontend

Development of responsive interfaces, dashboards, forms, user flows, state management and API consumption.

Technology stack
React
Next.js
Angular
Vue
Nuxt
TypeScript
Vite
02

Backend & APIs

REST APIs, business logic, authentication, authorization, services, domain rules and integrations.

Technology stack
Java
Spring Boot
Node.js
Express
C#
.NET
Python
FastAPI
03

Data

Relational and document data modeling, persistence, queries, migrations, historical data and data isolation.

Technology stack
MariaDB
MySQL
PostgreSQL
SQL Server
MongoDB
Firestore
04

Infrastructure & Deployment

Docker, environments, VPS, NGINX, reverse proxies, domains, certificates and application deployment.

Technology stack
Docker
NGINX
Linux
VPS
Git
05

Integrations

API design and consumption, and integration with external services, authentication providers, email, corporate tools and third-party platforms.

Technology stack
REST
Swagger
Firebase
Gmail API
Slack API
Google Sheets
SharePoint
06

Automation & AI

Design of n8n workflows and AI model integrations for classification, analysis, decision-making and automated actions.

Technology stack
n8n
Google Gemini
Kokoro
ONNX Runtime
FFmpeg
Webhooks

Projects

Products and solutions I've built

From SaaS platforms and full-stack applications to finance tools, operational management solutions and AI-powered automations.

01SaaS · Multi-tenant · HealthTech

SISO

Full development · Own product

A multi-tenant SaaS platform I am developing to digitize operations for healthcare and related service organizations. It uses a reusable core to support different verticals while keeping each organization's data and configuration isolated.

Project / 01In progress

SISO

02Full Stack · Traceability · Team Management

TraceUp

Full development · Own project

A web application I developed end-to-end to centralize the traceability of projects, meetings, meeting attendance and team deliverables. It manages ownership, commitment dates, statuses, submissions and change auditing, while keeping documents in SharePoint and operational traceability within TraceUp.

Project / 02MVP in development

TraceUp

03Personal Finance · Analytics

FinanzApp

Full development · Own project

An application for managing individual and shared finances in one place. It supports income and expense tracking, historical data and charts, monthly closing, savings tracking and investment performance monitoring.

Project / 03Own project

FinanzApp

04Full Stack · Sports Management · Finance

Valkirias Kickingball

Full development

A web application for managing the administrative, sporting and financial operations of a kickingball team. It centralizes players, payments, expenses, treasury, income, lineups and role-based permissions.

Project / 04In production

Valkirias Kickingball

05Automation · AI · Integrations

AI Customer Inquiry Automation

Full development

An intelligent automation built with n8n and Google Gemini to classify customer inquiries, analyze sentiment and trigger automated actions based on detected intent, integrating email, Slack and information logging.

View repository→
Project / 05AI automation

AI Customer Inquiry Automation

06AI · Computer Vision · Audio · Generative Media

AI Avatar · Lip Sync

Full development · Own project

An application I developed to generate talking-avatar videos from an image and audio, including text-to-speech generation. It implements local audio and phoneme processing, viseme generation, face detection, landmarks, lip deformation and automatic final video composition.

Project / 06Applied AI · In progress

AI Avatar · Lip Sync

Other development work

Web Development

Casa de Moneda — Web institucional

Development contributor

Contributed to the development and evolution of Casa de Moneda Argentina's corporate website.

E-commerce

Casa de Moneda — Tienda online

Development contributor

Contributed to the development of Casa de Moneda Argentina's online store, built with WordPress and WooCommerce.

Engineering

Different problems require different technical decisions.

My projects do not rely on a single architecture. I have worked with multi-tenant models, full-stack applications, relational and document databases, external services and automation workflows.

01

Multi-tenant architectures

Tenant separation, databases, licenses, permissions and configuration for building reusable SaaS products.

SISO

02

Full-stack applications

Frontend, backend, authentication, persistence, permissions and deployment as interconnected parts of the same solution.

TraceUp · React + Supabase + PostgreSQL · Auth + RLS · SharePoint

03

Data evolution

Data modeling and migration as products evolve, working with relational databases, MongoDB and cloud-based data services.

MariaDB · MongoDB · Firestore

04

Automation + AI

Workflows that connect systems, process information and use artificial intelligence to classify, analyze and determine which action should be executed.

n8n · Gemini · APIs

Automation + Artificial Intelligence

AI applied to real workflows

I also develop automations that combine n8n, AI models and external APIs. One example is AI Customer Inquiry Automation, which analyzes customer inquiries, identifies intent and sentiment, and automatically triggers different actions.

01 · Automation

AI Customer Inquiry

Inquiry classification, sentiment analysis and automated actions based on detected intent.

01

Gmail

Customer inquiry

02

Google Gemini

AI classification · Sentiment analysis

03

n8n

Workflow orchestration

Slack
Google Sheets
Gmail

02 · Generative Media

AI Avatar · Lip Sync

Talking-avatar generation through audio processing, phonemes, visemes, facial landmarks and automatic video composition.

01

Text / Audio

02

Kokoro · TTS

03

Phonemes → Visemes

04

Face landmarks · Lip deformation

05

FFmpeg → Video

How I build

From problem to production

I don't start by choosing a technology. I first understand the problem, the users, the data and the constraints. Then I model the solution, build it, integrate it, validate it and deploy it.

01

Understand

02

Model

03

Design

04

Build

05

Integrate

06

Validate

07

Deploy

08

Iterate

Product × Engineering

Product and technology are part of the same conversation.

Building software helps me understand the technical implications of product decisions. Working in product helps me keep technology focused on the problem, the user and the value it needs to create.