Data Engineer • Software Engineer • Lakehouse Architecture • Data Products • SaaS Platforms
I build end-to-end systems — from data ingestion and lakehouse architectures to backend services, frontend applications, cloud infrastructure, and product delivery.
I am a Data Engineer and Software Engineer focused on building scalable, maintainable, and production-oriented systems.
My work connects data engineering, software architecture, and product development, with hands-on experience in:
- designing lakehouse and medallion architectures
- building batch and streaming pipelines
- creating data products and analytical solutions
- developing backend and frontend applications
- structuring cloud-native SaaS platforms
- applying good engineering practices, from modeling to deployment
- PySpark
- Databricks
- Delta Lake
- Lakehouse Architecture
- ETL / ELT
- Batch & Streaming Pipelines
- Data Modeling
- Data Quality & Observability
- Python
- Java
- Spring Boot
- TypeScript
- Next.js
- REST APIs
- Modular Architecture
- Multi-tenant SaaS
- Azure
- GCP
- Docker
- Terraform
- CI/CD
- PostgreSQL
- GitHub Actions
A practical portfolio focused on real data engineering scenarios, documentation quality, architecture decisions, and project organization.
Lakehouse project applying medallion architecture, analytical modeling, and structured data engineering practices.
Real-time data pipeline using streaming concepts for event processing and analytical ingestion.
A broader platform-oriented project connecting industrial and enterprise data architecture concepts.
Responsive web platform for clinical operations, combining software engineering, backend structure, database design, and product thinking.
Right now, I am focused on projects involving:
- modern data platforms
- lakehouse-first architectures
- data products with business value
- software platforms with real operational use
- robust systems that combine backend, frontend, database, and infrastructure
- Website: phaiffertech.com.br
- LinkedIn: willian-phaiffer-cardoso
- Email: willian.phaiffer@phaiffertech.com.br
Versão resumida em Português
Sou Engenheiro de Dados e Engenheiro de Software com foco em arquitetura Lakehouse, produtos de dados, plataformas SaaS e sistemas de produção ponta a ponta.
Atuo conectando engenharia de dados, backend, frontend, banco de dados e infraestrutura para construir soluções escaláveis, organizadas e com valor real para o negócio.