Guilherme Vitorino

Software Engineer · Systems Architecture · AI-Enhanced Development

Building scalable systems, robust APIs, and modern web applications — with AI-assisted engineering, agent workflows, and automation.

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Projects

Portfolio

Current

Personal portfolio and blog built with Next.js 16 and React 19, featuring a file-based blog engine, full i18n (EN/PT), dynamic OG images, and technical articles.

Next.js 16React 19Full i18nFile-based CMSOG ImagesDocker

Next.js 16React 19TypeScriptTailwind v4Shadcn v4next-intlNextAuth v5TanStack QueryZod v4SentryVitestPlaywrightDockerpnpm

Clinitech

A complete management platform for medical clinics, focused on intelligent scheduling, electronic health records, and role-based access control. Engineered with complex business rules, modular architecture, and REST APIs, ensuring data integrity, security, and scalability.

Access ControlSmart SchedulingElectronic Health RecordsCloud InfrastructureEmail

Node.jsTypeScriptResendCloudflareDockerReactPostgreSQL

Professional Experience

Software Engineer

Almaviva Solutions S.A. • 2022 — Present

Worked on the development and modernization of critical systems for the public sector of the State of São Paulo, focusing on scalability, resilience, and software quality. Direct involvement in architectural evolution and in defining business-aligned technical solutions.

Technical leadership in defining architectural standardsMigration of legacy systems to microservices architectureReduction of technical debt through structural refactoringIntegration between multiple systems and APIs (internal and external)Technical mentoring, code reviews, and developer supportAI-assisted development and engineering tooling to improve productivity and code qualityDirect collaboration with stakeholders to define solutionsParticipation in strategic projects for PRODESP, including DIPOL and the Department of Agriculture

JavaSpring BootGCPTypeScriptNode.jsMicroservicesPostgreSQLDockerKubernetesREST APIsAngularReact

Software Engineering (Data) - Intern

Indra Comercializadora de Energias Ltda. • 2020 — 2021

Worked on building data pipelines for the Brazilian energy sector, focusing on automation, reliability, and decision support.

Integration with public APIs (NASA, INMET, ANA)Web scraping and data extraction from public energy sector sourcesProcessing and consolidation of large data volumesCalculation and analysis of energy indicators (ENA)Automation of data collection and processing pipelinesImprovement of operational efficiency through automation

TypeScriptNode.jsPostgreSQLDockerKubernetesREST APIsPythonData ProcessingETL

Technical Expertise

AI Engineering

AI-assisted development, agent workflows, and automation — from local models to production systems.

AI-Assisted DevelopmentLLM WorkflowsAgents & Automation PipelinesRAGLocal ModelsAI CoworkingAI Infrastructure

Architecture & Systems

Design and evolution of distributed systems, focusing on scalability, decoupling, and business domain.

Microservices ArchitectureEvent-driven systemsDomain-Driven Design (DDD)Distributed systems

Backend

Development of robust APIs and scalable services, focusing on performance, data modeling, and business rules.

JavaSpring BootNode.jsTypeScriptREST API DesignPostgreSQLRedis

Frontend

Building modern and high-performance interfaces, focusing on componentization and user experience.

ReactAngularNext.js

Infrastructure & DevOps

Containerization, deployment automation, and observability practices to ensure reliable production systems.

DockerKubernetesAWSCI/CD PipelinesObservability and monitoring

Engineering

Best practices applied to software development, including code quality, decoupled architecture, observability, and data consistency.

Code QualityScalabilityArchitectureResilienceObservabilityData Consistency

About Me

I work as a Software Engineer with over 6 years of experience in production systems, including high-criticality applications with large user volumes. I focus on building robust solutions, with emphasis on software architecture, data consistency, and reliability in real-world environments.

Throughout my career, I have worked on the evolution of complex systems, including legacy modernization, definition of technical standards, and continuous improvement of code quality. Experience with critical business rules, where technical decisions directly impact application integrity, performance, and scalability.

I have a strong product-oriented mindset, going beyond implementation by collaborating directly with stakeholders and cross-functional teams in defining solutions. I often take on the role of technical reference, participating in architectural decisions, code reviews, and technical direction, always focusing on maintainability, security, and sustainable software evolution.

Contact

Open to job opportunities and collaborations. Feel free to reach out!

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