Hi! I'm Rafael Witt, a software engineer from Brazil who thrives on building scalable architectures, resilient APIs, and automated pipelines that bridge data, infrastructure, and user experiences.
I work across backend systems, event-driven architectures, CI/CD automation, and composable front-ends, combining technical precision with strong product thinking.

I’m driven by clean architecture, performance, and automation — and I believe every system should be observable, testable, and extensible.

Designing and maintaining an integration platform that consolidates product and SKU data from multiple systems and synchronizes it with several business destinations.
Focus on catalog automation, rate limiting, resilience, and traceability.

Architecture Highlights

• AWS Serverless stack: Lambda (Node.js 22 + TypeScript), SNS, SQS (STANDARD/FIFO), EventBridge, DynamoDB (Dinamoose).
• Integrations: REST APIs and Kafka streams.
• Operational excellence: Distributed rate limiting, Datadog observability, DynamoDB idempotency + OCC, CI/CD via GitHub Actions and ECR.
• Governance: controlled redrive, optimistic concurrency, and immutable event sourcing for full traceability.

This ecosystem powers real-time catalog synchronization across thousands of SKUs, ensuring consistency and safety at scale.

Contributing to a global replatforming initiative that unifies multiple brand websites under a headless CMS + composable front-end architecture.
Built with AEM (Adobe Experience Manager) and Next.js, aiming for high performance and editorial flexibility.

Key Work Areas

• Front-end modules in React 18 / Next.js, aligned with design system tokens.
• Integration with GraphQL APIs for dynamic content delivery.
• Development of key modules such as PDPs, navigation, calculators, and dealer locator.
• Multi-locale content support via Next-Intl, plus SSR optimizations and code splitting.

• Talk2U Academy App – AI-powered language learning platform with gamified UX (Next.js, React Native, Firebase, OpenAI).
• WABA-NOX – WhatsApp Business API integration (Meta API + Heroku).
• Movies API & Activities Tracker – NestJS + TypeORM microservices with PostgreSQL and Redis.
• Scrapper Web – Python async data scraper using threading and mutex.
• Arduino-NTC – IoT prototype for environmental data collection.
• DevOps Tooling – Jenkins pipelines, GitHub Actions CI/CD templates, and observability dashboards with Grafana & Prometheus.

“Build systems that scale, code that lasts, and teams that trust automation.”