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Antonio C. Di Felice

Senior Database Architect → Data Engineer | 25+ Years Oracle Expertise | Expanding into Modern Cloud-Native Technologies

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About Me

Professional Journey & Expertise

25+ Years Database Expertise

Designed, implemented, and optimized mission-critical database systems for Public Utilities (energy, gas, water) serving 500k+ customers. Expert in Oracle 8i through 19c, complete database lifecycle management, and enterprise-scale system optimization.

Modern Technologies Focus

Actively expanding into Python, Oracle Cloud, and modern data stack. Combining 25 years of database architecture expertise with hands-on learning in contemporary technologies for unique value creation.

International Professional

Based in Italy, fully remote-first with English (C1) and Spanish (C1) proficiency. Strong collaboration skills with 10+ developers mentored, established coding standards, and cross-functional stakeholder experience.

Performance Track Record

Proven results: 70% query optimization improvement, 20% cycle time reduction, consistently <5% defect rate, 99.9% uptime on mission-critical systems. Regulatory compliance (ARERA) and quality-focused mindset.

Expertise & Skills

Technical Competencies

Core Database Expertise

Master-level database architecture and optimization:

Oracle 8i-19c PL/SQL SQL Optimization Execution Plans Indexing Strategies Data Modeling Performance Tuning

Data Integration & ETL

High-volume data pipeline experience:

ETL Processes Data Pipelines Data Quality REST APIs System Integration 10M+ records/day

Modern Technologies

Active learning & hands-on experience:

Python Pandas Oracle Cloud Git

Professional Skills

Leadership & collaboration:

Technical Leadership Mentoring Agile/Scrum Problem Solving Cross-functional Knowledge Sharing

Professional Experience

Career Highlights & Accomplishments

Senior Database Architect

Public Utilities Sector (Energy, Gas, Water)

2001 - Present | 25+ Years

Architected and optimized mission-critical database systems serving 500k+ customers with 99.9% uptime. Achievements: 70% query optimization improvement, 20% cycle time reduction, <5% defect rate through rigorous standards. Complete lifecycle management (design, implementation, performance tuning, compliance).

Key Projects:

Enterprise-scale database optimization for utilities infrastructure
High-volume ETL pipeline design (10M+ records daily)
Mission-critical system maintenance and enhancement
Regulatory compliance implementation (ARERA standards)

Database Performance Optimization

Specialized Focus

Ongoing Excellence

Deep expertise in query optimization, execution plan analysis, and indexing strategies. Consistently delivered performance improvements of 50-70%, reducing system load and improving user experience. Mentored 10+ developers in best practices.

Modern Technology Expansion

Active Learning & Development

2024 - Present

Transitioning expertise into modern cloud-native technologies while maintaining Oracle leadership. Active hands-on development with Python and Oracle Cloud capabilities. Building comprehensive portfolio projects to demonstrate end-to-end capabilities.

Certifications & Achievements

Professional Development & Recognition

Oracle Cloud Infrastructure 2024 Generative AI Certified Professional

Certified in OCI AI capabilities and modern cloud technologies | July 2025

Oracle APEX Professional

Enterprise application development platform expertise | 2024

GitHub Copilot Certified

AI-assisted development and modern coding practices | July 2025

Cambridge Advanced English (CAE) - C1 Level

Advanced English language proficiency | Cambridge Certificate

DELE C1 - Spanish Proficiency

Advanced Spanish language certification by Instituto Cervantes | February 2026

Professional Scrum Developer I

Agile/Scrum methodology certification | Certified

Portfolio Projects

Showcasing Real-World Applications

Data Engineering Pipeline

High-volume ETL pipeline using Python and Pandas. Processes 10M+ records daily with data quality validation and error handling.

Python ETL

REST API Integration

Multi-API orchestration framework with authentication, error handling, and rate limiting. Demonstrates modern API consumption patterns.

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APIs Python

Flask Web Application

RESTful API backend with SQLAlchemy ORM, Jinja2 templating, and modern web architecture patterns. Production-ready code.

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Flask SQLAlchemy

Web Scraping & Automation

Automated data collection using BeautifulSoup and Selenium. Task scheduling with robust error handling and logging.

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Automation Scraping

Database Design & Optimization

SQLite to Oracle migration patterns. CRUD operations with Flask-SQLAlchemy, performance optimization, and data modeling.

Databases Optimization

Algorithm & Data Structures

100-Days-of-Code™-The-Complete-Python-Pro-Bootcamp projects showcasing data structures, modules, packages, and algorithm implementations with clean code.

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Algorithms Data Structures

Space Race Data Analysis (1957–2020)

Exploratory data analysis on 4,300+ space missions using pandas and Plotly. Choropleth maps, sunburst charts, dual-axis time series, and Cold War USA vs USSR comparisons revealing 60 years of geopolitical space history.

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pandas Plotly

🔍 More projects available on my GitHub repository

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