Walter Challier Email & Phone Number

• Led the full lifecycle of ERP software development, including surveying, designing, developing, implementing, and maintaining systems tailored to government needs.• Utilized a robust tech stack: Python/Django for backend development, HTML5, CSS/Bootstrap for front-end, and JS/jQuery for interactive elements.• Engineered and automated the generation of comprehensive PDF reports using Java/iReport.• Set up and configured CentOS Linux servers, managing production environments with Django, Apache, and PostgreSQL to ensure stable and secure deployments.• Developed custom modules for mass email distribution through Python, streamlining communication processes.• Conducted regular system backups using bash scripts and crontab, ensuring data integrity and recovery.

• Spearheaded backend web development projects using a diverse stack: Python/Django, PHP/Laravel, and databases like PostgreSQL and MySQL.• Set up and optimized development environments on Linux distributions (Debian, Ubuntu, Mint) to ensure smooth and efficient coding practices.• Implemented and managed production environments for web applications, deploying Apache, PHP, Django, PostgreSQL, and MySQL on bare-metal cloud servers and traditional web hosting platforms.

Entre Ríos Province, Argentina

• Developed and maintained dynamic web applications using a full stack of technologies, including Python/Django and PHP/Laravel for backend development.• Crafted responsive and user-friendly front-end interfaces with HTML5, CSS/Bootstrap, and JavaScript/jQuery.• Managed robust databases, ensuring efficient data handling and storage with PostgreSQL and MySQL.

• Led the design, development, and implementation of a customized ERP system for the Social Area department, enhancing operational efficiency and data management.• Utilized Ruby on Rails for backend development, ensuring a scalable and maintainable system architecture.• Developed user-friendly interfaces with HTML and CSS, providing a seamless user experience.• Integrated MySQL for reliable and efficient database management, enabling robust data storage and retrieval.

• Collaborated in the development of critical modules for government information systems, enhancing the functionality and performance of existing solutions.• Utilized Java and JPA-Hibernate for backend development, ensuring data consistency and integrity across the system.• Managed and optimized PostgreSQL databases to support robust data operations.• Developed interactive components using ActionScript, improving user engagement and system usability.