Cosmic background
MARCELO SOUZZA NONATO

Full-Stack Engineer& AI Analyst

Marcelo S. Nonato -Marcelo S. Nonato -Marcelo S. Nonato -Marcelo S. Nonato -

About me

Origin story

My journey in programming began at 16, during high school, when I won a scholarship at Fucapi. Being among the top 50 grades led to my first practical, paid experience: developing a school management system for remote communities in Amazonas. This early start shaped my drive to use technology to solve real-world problems.

Current chapter

Today, I'm a Full-Stack Engineer & AI Analyst with 5+ years of experience. At Positivo Tecnologia, I single-handedly built an AI-powered document analysis service that cut government contract review from 1-2 weeks to ~5 minutes per case with ~90% accuracy, enabling a team of 6 analysts to focus on higher-value work.

Technical expertise

On the front-end I build with React and Next.js. On the back-end, Node.js, NestJS, and Fastify. On the AI side, I work with Python, LangChain, and Pydantic to create production AI workflows — from PDF preprocessing pipelines to agent-based document processing with async orchestration via Celery and Redis.

What drives me

I turn slow, manual processes into fast, reliable products. Whether it's building AI workflows that automate complex analysis or shipping e-commerce platforms from scratch, I thrive at the intersection of Artificial Intelligence and Software Engineering.

The mindbehind the code

Skills

Career

AI Analyst

Positivo TecnologiaFeb 2025 - Oct 2026

Single-handedly designed and built an AI-powered document analysis service using Python, Django, LangChain, and OpenAI GPT-4.1, cutting contract analysis from 1-2 weeks to ~5 minutes with ~90% accuracy. Engineered 3 production AI workflows with async processing via Celery, Redis, and Docker, enabling a team of 6 analysts to focus on higher-value work.

PythonDjangoLangChainOpenAIPydanticCeleryRedisDocker

Full Stack Developer

MarttechSep 2024 - May 2025

Owned the entire backend of Bubbles, a visual decision-tree chatbot builder, implementing all CRUD operations with Next.js Server Actions. Designed the DynamoDB data model on AWS for hierarchical chatbot flows with dynamic restructuring. Built screens for a school management platform with React and TanStack Query, applying optimistic updates.

Next.jsReactNode.jsTypeScriptDynamoDBTanStack QueryAzure DevOps

Full Stack Developer

MKS SistemasDec 2023 - Apr 2024

Took ownership of a second iGaming platform with React, TypeScript, and Node.js, enabling a team of 4 to deliver both products in parallel. Implemented i18n across multiple platforms supporting 8 languages for a global user base. Integrated TanStack Query with lazy loading to cache data and speed up page loads.

ReactTypeScriptNode.jsTanStack QueryReduxi18nFramer Motion

Front-End Developer

Mkplace TechnologyFeb 2022 - Jul 2023

Built the House of Gamers e-commerce from the ground up as part of a 5-person team with React, Next.js, and TypeScript. Implemented end-to-end test suites with Cypress covering every storefront flow. Developed and maintained the Victor Hugo, MiBR, and Pillowtex e-commerce platforms.

ReactNext.jsTypeScriptCypressGitGitHub

Full Stack Developer

UniNorteOct 2020 - Dec 2020

Set up the base architecture for new projects with React, TypeScript, and Styled Components, and designed web prototypes in Figma. Built a reusable component library documented in Storybook, standardizing the UI and speeding up team delivery.

ReactTypeScriptStyled-ComponentsStorybookFigma

Front-End Developer

FUCAPIFeb 2016 - Apr 2017

Collaborated on a school administration system for remote communities, building interfaces with HTML, CSS, JavaScript, Bootstrap, and Materialize. Developed fully responsive screens ensuring a consistent experience across all devices.

HTMLCSSJavaScriptBootstrapMaterialize

What I do

Design

I transform complex ideas into intuitive, aesthetic interfaces. My focus is on creating fluid user journeys that don't just look good, but solve real problems and drive engagement.

Development

Full-stack specialist across React, Next.js, Node.js, and Python ecosystems. I deliver robust, scalable, and SEO-optimized applications with end-to-end test coverage, ensuring your product is fast and reliable.

Artificial Intelligence

I build production AI workflows that automate complex processes. From LLM orchestration with LangChain to RAG pipelines with vector databases, I turn weeks of manual work into minutes of automated analysis.

Full package

The complete solution: from interface design to AI integration, database architecture, and cloud deployment on AWS, Azure, or Vercel. I handle the entire lifecycle with total project cohesion.

Transforming ideasinto digital products

pharmacare BackgroundfitAI Backgroundlozzato Backgroundportfolio Background

RecentWork

Pharmacare

A multi-tenant pharmacy management platform (Next.js, PostgreSQL, Prisma) for Brazilian drugstores. Features an offline-first point of sale with NFC-e e-invoicing, FEFO batch and expiry inventory control, and regulatory compliance (SNGPC, CMED) behind role-based access control.

pharmacare Mobile AppfitAI Mobile Applozzato Mobile Appportfolio Mobile App
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Let's work together

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