2017–2022
Systems Analysis and Development
FATEC
Programming, databases, web development, information security, requirements analysis and systems architecture.
Hi, I'm
Jhonatan Pinheiro
Data Engineer
I turn data and code into products that work. Full-stack developer and Data Engineer specialized in ETL and performant web systems. Currently preparing to become a Data Scientist.
Support / ContributeScroll to explore
About me
The builder behind the code
Full-Stack Developer and Database Administrator with strong experience in Data Engineering. I turn requirements into reliable software: I model relational databases, write complex SQL queries, build ETL pipelines and deliver end-to-end web applications, deployed with Docker on Linux.
With a degree in Systems Analysis and Development from FATEC, I combine a background in IT support and cybersecurity with business insight from the commercial field. I deliver secure systems, clean and reliable data, and solutions that create real value — always with documentation and best practices.
I'm open to new opportunities and partnerships. If you need to build a system, optimize databases or structure your data, let's talk.
- Database modeling and optimization
- ETL pipelines and data cleaning at scale
- Consulting with end clients for data handling and ETL
- Full-stack web applications and APIs
- Infrastructure with Linux, Docker and CI/CD
Brasil
Journey
Professional experience
Developer | Data Engineer
CurrentPoloUsinagem·Dec 2024 — Present·São Paulo, Brasil
- Creation and adjustment of Business Intelligence dashboards (Power BI).
- Data handling and modeling for management reports.
- SQL queries for reports on PostgreSQL, MySQL and Firebird.
- Website development and maintenance.
- Creation of process-automation scripts.
- Workflow automation and integrations with n8n.
- Internal APIs for data import between systems.
- Application containerization with Docker.
- Billing (boletos) generation and support for invoice issuance.
- Adjustment of client and product spreadsheets.
Developer Analyst | Data Analyst
RadiusNet·Apr 2023 — Dec 2024·Brasil / Argentina
- Analysis, development and mapping of new features.
- Logic and structuring of relational databases (MySQL and PostgreSQL).
- Writing SQL queries — DDL, DML, DQL, DTL and DCL.
- ETL processes (extract, transform, load).
- Preparation, analysis and execution of data imports.
- Data handling and cleaning.
- Database backup routines.
- Back-end development in PHP.
- Integration with ISP system databases: Mk-Auth, SGP, HubSoft, Beesweb, MikWeb, IXC Soft, among others.
- RADIUS authentication management for internet service providers.
Computer Support Analyst (Help Desk)
Adesso Tecnologia·Oct 2021 — Jan 2023·Jundiaí, São Paulo
- Planning and execution of cyber-protection operations with Acronis Cyber Protect Cloud.
- Email security management through Acronis and Perception Point web consoles.
- Licensing, agent installation and tenant/user management in Cyber Protect Cloud.
- Cloud-based backup, recovery and disaster recovery (failover/failback).
- Disk-health monitoring, software/hardware inventory and patch management.
- Remote administration: group management, remote desktop and remote assistance.
- Network security with Blockbit Network Security Firewall.
- Administration of firewall, switch, hub and Ubiquiti UniFi.
- Installation and removal of Bitdefender agents.
- Support for Windows and Linux operating systems and ERP.
Junior Member — Research
ENGCAMP Finance / UNICAMP·Jun 2020 — Nov 2020·Campinas, São Paulo
- Financial-market research and analysis in a UNICAMP-linked academic league.
- Study of economic trends and scenario modeling.
- Development of innovative financial strategies.
- Multidisciplinary collaboration to build solutions.
Sales Supervisor
Burger King do Brasil·Jun 2015 — Jul 2017·São Paulo e Região
- Leadership, training and management of the sales team.
- Cost of goods sold (COGS/CMV) control.
- Ownership of the full operational process, end to end.
- Overall stock control and product rotation.
- Inventory monitoring with FIFO and FEFO methods.
- New-product sales strategies.
- Point-of-sale marketing actions.
- Customer service.
- Cash closing.
- Accountable for meeting monthly and annual targets.
Stack & Tools
Technical skills
Languages
- SQL
- Python
- PHP
- JavaScript
- HTML & CSS
Databases
- SQL Server
- PostgreSQL
- MySQL
- Oracle
- Firebird
Data & BI
- ETL
- Business Intelligence
- Power BI
- Data Cleaning
Backend & Automation
- Supabase
- n8n
- Postman
AI & Assistants
- Claude Code
- ChatGPT
- Gemini
- OpenCode
- Big Pickle
Tools & Platforms
- Git & GitHub
- GitLab
- Docker
- Linux (Ubuntu)
- VS Code
- HeidiSQL
- Bootstrap
- Jira
Infrastructure & Security
- Active Directory
- Zabbix
- GLPI
- Blockbit (Firewall)
- Bitdefender
Web3 & Blockchain
- Blockchain
- DeFi
- Web 3.0
- Wallets (Cold/Hot)
- Tokens & Runes
What I built
Featured projects
Electronic Time Clock
Time-clock system for desktop and mobile, with authentication, workday control and attendance reports.
- PHP
- MySQL
- JavaScript
- Web
Snake Game
Classic snake game built with JavaScript and Canvas, playable directly in the browser.
- JavaScript
- Canvas
- Game
Power BI Dashboard
In progressBusiness Intelligence dashboard with interactive metrics and visualizations for decision-making — in progress.
- Power BI
- BI
- Data
Certifications
Certificates & Courses
Credentials and courses that back up my work.
Systems Analysis and Development
FATEC · 2022
SQL Database Administration
Curso · 2023
Docker & Containers
Curso · 2023
Power BI & Business Intelligence
Curso · 2024
Recommendations
What people say about me
Recommendations from people I've worked with throughout my career.
O Jhonatan é super profissional e disposto sempre a ajudar os colegas. Tive o prazer de trabalhar com ele no RadiusNet, onde ele demonstrou um desempenho incrível como DBA.
Let's talk
Get in touch
Open to opportunities, partnerships and projects. Send a message — I'll reply as soon as possible.