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Mathias Tejeda

@mathiastejeda

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I build backend integrations, REST APIs, and data workflows with Go, Perl, Python, and SQL.

Argentina

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What I'm looking for

I'm looking to build backend applications, REST APIs, system integrations, and data-driven solutions while improving processes and growing in data-focused development.

I'm building applications at EYSE with Go, PostgreSQL, and JavaScript, focused on data visualization, management solutions, and internal workflow automation.

Previously at E-planning Argentina, I developed backend-to-frontend integrations using JavaScript, REST APIs, and XML. I built Perl backends for system integrations, data processing, and REST APIs.

I've created complex SQL reports and queries for data analysis and synchronization, and developed an onboarding system that processed PDFs and integrated APIs for data loading.

I bring experience integrating with SQL Server and existing systems, alongside hands-on work with Go, Perl, Python, SQL, and JavaScript. I'm currently pursuing a degree in Data Science.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Developer

Current

EYSE

Jan 2025 - Present (1 year 8 months)

Developed applications using Go, PostgreSQL, and JavaScript. Automated processes and optimized internal workflows, with solutions for data visualization and management, integrating with SQL Server databases and existing systems.

Go PostgreSQL JavaScript SQL Server Automation Data Visualization

Backend / Fullstack Developer

E-planning Argentina

Jan 2022 - Jan 2025 (3 years)

Developed backend-frontend integrations using JavaScript, REST APIs, and XML. Built interfaces with JavaScript, jQuery, and EmbPerl, and implemented backend in Perl for system integrations, data processing, and REST APIs. Created SQL reports and complex queries for data analysis and synchronization, and developed an onboarding system with PDF processing and API integrations.