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Hi, I’m Marcelo Rosa Fontes.
Specializing in Node.js, TypeScript and building scalable applications, APIs and intelligent solutions.
type Engineering = {
focus: string;
stack: string[];
};
const profile: Engineering = {
focus: 'backend',
stack: [
'Node.js', 'TypeScript'
],
};01 / ABOUT
Approximately five years of development experience. Full Stack Development education at Estácio. Experience building internal systems at Marinha do Brasil — CIASC and working as a freelancer at Zelper.
Understand the context, model the solution and evolve with clarity. An approach that connects technical decisions to product needs.
Education at Estácio
02 / EXPERIENCE
03 / PROJECTS
A selection of personal projects and professional contributions. Conceptual visuals provide context without exposing confidential interfaces or data.
5 project(s)
Backend / Full Stack / AI
Application automation and management, from discovering job opportunities to tracking applications.
Backend / Full Stack
Email management and classification with OAuth2 authentication and incremental synchronization.
Backend / AI
Freelance development for a B2B SaaS platform with integrations and AI features.
Backend / Infrastructure
Legacy application modernization, version migration and web environment maintenance.
Game Development
A personal game development project featuring 2.5D exploration and tactical combat mechanics.
04 / TECHNOLOGIES
Tools organized by area, without arbitrary proficiency percentages.
05 / ARCHITECTURE & ENGINEERING
A conceptual modular architecture example. This diagram is illustrative and does not represent a client’s internal architecture.
Authentication identifies who is accessing the system; authorization defines what they can do. Validation and limits protect its boundaries.
Modules isolate business rules. Asynchronous tasks and external integrations need contracts and failure handling.
Explicit data modeling, access-oriented indexes and structured logs help maintain and investigate a system.
06 / CONTACT
A conversation about products, backend and engineering challenges starts here.
Contact links will be available soon.