Welcome to my GitHub profile!
I'm Jeferson Peter, a Software Developer with expertise in process automation, modern web development, and data-driven solutions.
My focus is on creating scalable and efficient systems using cutting-edge technologies.
With a passion for learning and problem-solving, I aim to deliver impactful solutions that bridge business needs and technology.

• 🔧 Core Expertise:
  • Process automation with Python, Apache Airflow, and scripting tools.
  • Building robust APIs using Django and Django REST Framework.
  • Full-stack web development with Next.js and React.
• 🌟 Additional Skills:
  • Knowledge of Agile methodologies, ensuring adaptability and collaboration in team environments.
  • Expertise in databases such as PostgreSQL and MySQL, including database design and optimization.
• 📖 Learning Goals: Continuously expanding knowledge in distributed systems, container orchestration (Docker, Kubernetes), and advanced design patterns.

• CloakData
  A flexible and extensible data anonymization library built on Polars.
  Designed for privacy, compliance, and testing with minimal overhead.
  Available on PyPI:

  

• Airflow Data Pipelines

  A collection of modular and production-ready DAGs for data processing and automation, designed with maintainability and scalability in mind.

  🔗 Resources:

  • Repository

  Built with Apache Airflow, featuring parameterized DAGs, custom operators, and clear separation of concerns across tasks.

• Financial Tracker

  A full-stack finance management system (🚧 in progress), split into backend and frontend:

  🔗 Resources:

  • Backend – Built with Django REST Framework and secured with JWT authentication.
  • Frontend – Developed using Next.js and Shadcn UI, with dynamic data visualization and a modern, responsive interface.

• Designed ETL pipelines with Apache Airflow and Polars.
• Built scalable REST APIs using Django REST Framework.
• Developed full-stack apps with Next.js and React.
• Experienced in Docker, RabbitMQ, Redis for distributed systems.

• Author of bilingual articles on Python, Data Engineering, and Automation.
• Publishing technical tutorials on my Blog.
• Building the CodeCraft Python series (e-book + articles).

• When to Choose Pandas vs Polars — A Practical Perspective — Nov 13, 2025

• Lazy Evaluation in Polars vs Immediate Execution in Pandas — Why It Changes Everything — Nov 6, 2025

• Sorting and Ranking — Pandas vs Polars — Oct 23, 2025

• Handling Null Values — Pandas vs Polars — Oct 16, 2025

• Merge/Join Operations — Pandas vs Polars — Oct 9, 2025