MarcelloRonald
You've got to start with the customer experience and work backwards to the technology. You can't start with the technology and try to figure out where you're going to try to sell it.
- BR · Goiânia
- Open to work
Projects
Technical Skills
Organized by engineering domain. Each skill links directly to the production systems and projects where I've applied it.
Back-end & Architecture
01Clean & hexagonal architectures, REST APIs, event-driven microservices, and data stores.
Front-end & UI
02Modular web applications, monorepos, design systems, and responsive interfaces.
AI & LLM Workflows
03Production AI agents, conversational screening, RAG pipelines, and AI-augmented development.
Cloud, DevOps & Quality
04Containerized deployments, CI/CD automation, integration testing (TDD), and observability.
About me
Hello!! I am Marcello Ronald!
// Who am I?
Full-Stack & AI Software Engineer (UFG) focused on turning complex business problems into scalable web applications and production LLM workflows. With hands-on experience building multi-tenant AI platforms at CognX and public-sector systems for the State Government of Goiás (SEAD), I work end to end — from requirements and hexagonal back-end architecture (.NET, Python/FastAPI) to modern front ends (React, Next.js, Angular) and cloud deployment on GCP.
- Experience · ContractMay 2026 → Oct 2026 · Aparecida de Goiânia, GO (6 mos)
Full-Stack & AI Software Engineer · CognX
Engineered and evolved AI-driven products from concept to production at CognX, an AI orchestration startup. Key deliveries:- Lead developer of the company's multi-product AI agent platform in production at a large enterprise client: .NET 10 back end (hexagonal architecture, MongoDB) and Next.js 16 / React 19 monorepo on Google Cloud Run.
- Architected and built the recruiting and multi-tenant administration modules (users, groups, and per-company permissions via Clerk), integrated with WhatsApp, Langflow, and Senior HCM — authoring 7 of the module’s 8 Architecture Decision Records (ADRs).
- Experience · InternshipOct 2024 → May 2026 · On-site, Goiânia (1 yr 8 mos)
Software Developer · Goiás State Department of Administration (SEAD)
Part of the Systems Development Management department (GEDS), engineering and maintaining public-sector systems for the State Government of Goiás. Key deliveries:- Core front-end developer of Portal Reutilize, launched in June 2026: a statewide platform where public agencies list and reallocate idle assets without bureaucratic letters.
- Contributed from inception (requirements, user stories, and Figma prototypes) through the first 10 MVP sprints of Reutilize.
- Education2023 → 2028 (expected) · 7th semester (GPA 8.5/10)
B.S. in Software Engineering · Federal University of Goiás (UFG)
Studying Software Engineering at UFG, focusing on software architecture patterns, distributed event-driven microservices, automated testing, databases, and algorithm design.
Contacts
Let's work together
I'm open to remote Full-Stack & AI Software Engineering roles (in Brazil or abroad) as well as select freelance and consulting projects. If you have an interesting challenge, let's talk.
mronaldjs@gmail.com