About Célio Vieira

I build at the intersection of applied artificial intelligence, petabyte-scale data engineering, and commercial venture creation. As a Founder, AI & Data Engineer, my focus is turning deep technical systems into resilient, high-impact digital products. Rather than treating emerging technology as speculative demos, I approach engineering from first principles—crafting architectures that scale seamlessly under production workloads while driving real business momentum.

My engineering foundation is rooted in formal computer engineering and a postgraduate specialization in Cloud Computing Process & Architecture. Over years of hands-on architecture, I have engineered mission-critical distributed systems—from event-driven hexagonal microservices running on AWS serverless backends (Lambda, SQS, EventBridge, DynamoDB) to petabyte-scale lakehouse platforms leveraging Apache Spark, Apache Iceberg, Glue, EMR, and Airflow. I specialize in designing streaming and batch data engines that guarantee ACID transactions, partition evolution, and FinOps cost efficiency without compromising throughput.

In the AI domain, my work centers on high-precision Applied AI and private, zero-leakage infrastructure. I design retrieval-augmented generation (RAG) pipelines with hybrid vector search, prompt graph reasoning topologies, and autonomous task-oriented agents. On self-hosted servers, I actively experiment with model quantizations, fine-tuning, and inference pipelines utilizing Ollama, HuggingFace, and ComfyUI—delivering secure, local intelligence that protects data sovereignty while maximizing speed and accuracy.

Bridging systems architecture with modern full-stack product engineering (TypeScript, React, React Native, Node.js, Go, Python), I take complete end-to-end ownership from system design to production scale. This multi-disciplinary capability is the engine behind Aldeon (aldeon.app)—my venture umbrella operating live products like Be Your Stories on Web, iOS, and Android, smart automation engines, and open-source developer tooling.