Mario Elisei — Design Engineer

AI + Engineer :: Certification Stack

Mario Elisei — Design Engineer building scalable ecosystems for complex platforms. I leverage advanced systems architecture to design and implement highly precise, component-driven digital products.

AI stack & certifications — Google AI Professional, Anthropic, IBM, Adobe

Based in Brazil 🇧🇷 Est. 15+ Experience +85 projects

AI & Intelligence

Intelligent systems, prompt engineering, AI-driven UX

Engineering

Systems architecture, frontend, design engineering

Automation

Pipelines, workflows, custom tooling

Design

UI/UX, brand identity, visual systems

01 About

Mario Elisei

Design Engineer

AI is generating results...

AI Product Design.
Engineering + Design 🚀

Computer Engineer with a postgraduate degree in Industrial Automation Engineering and a strong background in design and systems thinking. By combining engineering, design, and AI-driven product development, I build highly complex digital systems that balance scalable architecture, service integration, usability, and visual precision. Currently, I work as the principal design engineer on the AI team, designing systems that integrate artificial intelligence into enterprise platforms, improving workflows, reducing cognitive load, and optimizing operational and energy efficiency.

LinkedIn GitHub

04 Stack

AI Systems

Prompt Engineer LLM flows AI tools

UI / UX

Figma Design System Prototyping

Frontend

HTML/CSS React Motion

Automation

Workflows IoT industrial API Integration

CODE ASSISTANT

MCP

"Design decisions translated directly into code — Figma, Claude and VS Code connected through MCP, closing the gap between intent and implementation."

02 Featured Work Enterprise · NDA · Preview only

Enterprise Client · Platform Backoffice · Enterprise SaaS

Workspace &
System Architecture

End-to-end design of a multi-role enterprise backoffice platform. From identity management to workflow automation — structured as interconnected systems across 9 distinct flows.

220+Screens

9Flows

15Modules

8Integrations

4User roles

~1wkHandoff

FigmaDesign SystemDesignOpsEnterprise2 Themes

Enterprise · AI Product AI Product · Chat Interface

AI Chat
System

Enterprise conversational AI interface supporting multiple models — Claude, Gemini, OpenAI and Copilot — configurable at parametrization level. Full Light and Dark theme coverage with complex state management across message flows and multi-agent support.

4AI Models

2Themes

EnterpriseGrade

ClaudeGeminiOpenAICopilotMulti-model

Enterprise · Dev Tools Dev Handoff · Documentation

CRUD &
Dev Handoff

Structured extraction of system flows mapped for development autonomy. Complete CRUD documentation enabling dev teams to implement and adjust independently.

Readyto Dev

FullCRUD

CreateReadUpdateDelete

Web Design · Platform Developer Portal · Design System

Developer Portal
& MKTP/B2B/B2C

End-to-end design of an API Management platform and Developer Portal serving three of Brazil's largest retail brands — Casas Bahia, Ponto and Extra.com. Designed for sellers and integrators accessing the Marketplace APIs, covering B2B and B2C flows across the entire Grupo Casas Bahia ecosystem.

3Brands

1200+APIs

MKTP+B2B+B2CCoverage

APIM+ Dev Portal

DSCore

Casas BahiaPontoExtra.comAPI ManagementDeveloper PortalDesign SystemMarketplace

APIM API Management Platform

API Manager

Upstreams, Extensions, Permissions, Deployments and Configuration — full 5-module APIM platform designed for internal teams managing thousands of API endpoints.

5Modules

35200+Endpoints

APIMGatewayPermissions

Design System Prototype · Tokens · Components

Design System
Core

Core design system built to serve all three brands with shared token architecture, component library and documentation — enabling consistent UI across the entire developer platform.

3Brands

CoreTokens

TokensComponentsPrototypeDocs

Independent · Developer Web Design · Full Stack

Web Design &
Development

End-to-end delivery of 20+ websites — from domain registration and hosting setup to back-end configuration, visual design, implementation, deployment and ongoing maintenance. Every project owned fully from brief to live.

20+Websites

E2EOwnership

Domain+ Hosting

Back+ Front

Live& Maintained

HTML/CSSJavaScriptWordPressDomainHostingBack-endDeployment