Available for new contracts
Yago Marinho@yagomarinho

Fullstack developer and UI/UX designer building end-to-end digital products — turning ideas into real products.

FullstackDeveloper

It’s not just about code — it’s about solving the right problem. I build digital products from concept to delivery, combining product vision, UX, and engineering to create consistent, scalable, and well-structured solutions.

+6Years of experience
+20Independent projects
+3Countries served

OperationalWorkflow

I turn problems into digital solutions through a structured workflow focused on clarity, scalability, and user experience.

Designing solutions...

Foundation

I focus on solving real problems before thinking about technical solutions. I understand context, users, and product goals to avoid superficial decisions.

Methodology

I work with a focus on clarity, simplicity, and maintainability. I use UX principles, product design, and clean architecture to guide technical and interface decisions with consistency and intention.

Execution Stack

Ideation & Planning
Main Stack
Complementary Stack
Infra & Deploy

Projects

Ideas turned into products — from the first draft to production code.

01

Authorization Engine (DSL-based)

A domain-driven authentication and authorization solution designed to handle complex access rules in a clear and scalable way. The system uses a DSL to express permissions directly within the business context, centralizing access decisions in a consistent and auditable model. This approach reduces rule fragmentation, simplifies the evolution of security policies, and turns authorization into an explicit and sustainable part of the product architecture.

NodeJS
ExpressJS
DSL
Authorization
Security
02

Davna AI

An English conversational AI designed to support language practice in professional contexts through a simplified voice chat interface. The system allows users to interact with an AI-based “teacher” that guides the conversation with a focus on grammar correction and communication improvement. During interactions, users can access message transcription and translation, facilitating understanding and reinforcing learning. The approach prioritizes continuous practice, realistic context, and immediate feedback, making the experience closer to everyday English usage.

Open Source
Conversational AI
NextJS
NodeJS
GPT Models
DDD
03

Notion Blog

A blog built using Notion as a headless CMS, designed to simplify content publishing without sacrificing performance and control. The application leverages static generation with Next.js and a serverless function responsible for triggering redeploys whenever new content is published, keeping the site automatically in sync. Developed with Node.js, TypeScript, and a modular monorepo architecture, the project explores a pragmatic approach to content management, balancing operational simplicity, writing experience, and delivery consistency.

NextJS
Notion API
TypeScript
SSG
Serverless

Journey

A journey built between design and engineering — continuously evolving

Nov 2025 - Present

Davna AI (Open Source)

FullCycle Developer & UX/UI Designer

Developing a conversational AI to improve corporate English. Created for personal use and to help others evolve their professional communication.

NextJS
NodeJS
GPT
Hexagonal
Feb 2026 - May 2026

SMGeo Consulta (Niceplanet)

Mid-level Fullstack Developer

Restructured access control and user management in SMGeo Consulta. Built integrations for compliance reports and territorial analysis for retail clients.

ViteJS
FastAPI
Python
DDD
Dec 2025 - Feb 2026

Market Intelligence (Private Client)

Mid-level Fullstack Developer

Developed an automated data collection solution for marketplaces. Significantly reduced manual operational workload and optimized management processes.

Playwright
NodeJS
AWS
Events

Wanna WorkWith Me?

Do you have an idea or a problem to solve? Let’s talk and turn it into a real product.