Data Engineering
Pipelines, reconciliation, PostgreSQL models, data-quality checks and operational reporting.
Building better systems
Vinicius
Santana
Software & Data Engineer
I build reliable systems where software, data and infrastructure meet.
- Data Systems
- Distributed Infrastructure
- Backend Engineering
- Public Health
Brazil, UTC-3 · Software, data & operations
Three systems. A conceptual map of the work, not a live network.
Resume & contact
A quick path to the practical details.
I’m open to remote Software Engineering, Data Engineering and platform-focused conversations.
About
I build backend systems for data-heavy, operational work.
I’m Vinicius Santana, a Python backend engineer in Brazil. I build FastAPI and PostgreSQL services, validation workflows and automation for municipal public-health operations—work that validates 21,000+ records each month and reduced a municipality-wide reconciliation cycle from 240+ person-hours to about four.
Software Engineering
Backend APIs, automation tooling, testable workflows and maintainable service boundaries.
Experience
Software, data, infrastructure and operations in practice.
Experience spanning public-health software and data, Linux infrastructure and operational automation, with measurable improvements to reliability and decision-making.
Prefeitura de Presidente Epitácio
Health Informatics Analyst & Data Engineer
Oct 2023 — Present
- Process 21,000+ public-health records each month across municipal and partner facilities.
- Reduced claim denial rates from 12%+ to below 1% for eight consecutive submission cycles.
- Cut workforce reconciliation from 240+ person-hours to about 4 hours per cycle.
- Profiled four legacy systems and corrected 10,000+ records to clear the SIA/SIH backlog.
- Use Python, SQL, PostgreSQL, Java and Spring across validation, integration and operational workflows.
IT Infrastructure & Systems Support · Internship
Nov 2021 — Oct 2023
- Operated nine municipal Proxmox/Linux compute nodes, two backup nodes, 23 LXCs and seven VMs.
- Maintained rotating snapshots plus incremental and weekly full backups for clinical and billing systems.
- Used Ceph replication for high-availability services and resolved replication failures.
Irmãos Santana
Business Analyst & Operations Manager
Feb 2021 — Jan 2026 · Part-time
- Increased profitability by 26% and reduced feed waste by 11% through redesigned controls and workflows.
- Built Python automation and MQTT monitoring prototypes for production, inventory, water quality and cost data.
Stack
Tools used across backend, data, reliability and frontend work.
Backend
- Python
- Java
- FastAPI
- Spring
- Pydantic
- SQLAlchemy
- REST/OpenAPI
Data
- SQL
- PostgreSQL
- Redis
- DynamoDB
- InfluxDB
- Parquet
- MinIO/S3
Testing & Quality
- Pytest
- Hypothesis
- Testcontainers
- Ruff
- Pyright
Platform & Reliability
- AWS
- Docker
- Linux
- Ansible
- Prometheus
- Grafana
Frontend
- TypeScript
- React