Available to hire
Hi, I’m Cristian Hernán Balmaceda, a Senior Software Engineer and Full Stack Architect based in Argentina with over 15 years of experience building and scaling enterprise-grade applications.
I specialize in the PHP ecosystem (Laravel, Yii2) and modern JavaScript, delivering high-performance RESTful/SOAP APIs and refactoring legacy systems for US-based companies. I’m agile-minded, autonomous, and quick to adapt to emerging technologies, including AI-driven development workflows and Python/React ecosystems.
Skills
Language
Spanish; Castilian
Fluent
English
Advanced
Work Experience
Full Stack Developer at RentingCarz / AgentCars
January 1, 2018 - November 5, 2025Developed and maintained car rental platforms for multiple countries. Refactored legacy systems, improved performance and upgraded libraries. Integrated external providers via REST and SOAP APIs. Automated internal processes and backoffice. Resolved critical production bugs and added new modules. Participated in architecture decisions and agile development with Jira and Bitbucket.
Full Stack Developer at Doctor.com
January 1, 2018 - January 1, 2018Developed and maintained a platform for healthcare professionals in the US. Implemented profile, appointment, and review modules. Integrated CRMs, insurers and calendars via APIs. Refactored legacy code for performance and security. Worked remotely with daily stand-ups and monthly company-wide meetings.
Full Stack Developer at Doctor.com
January 1, 2010 - January 1, 2018Developed and maintained a platform for healthcare professionals in the US. Implemented profile, appointment, and review modules. Integrated CRMs, insurers and calendars via APIs. Refactored legacy code for performance and security. Worked remotely with daily stand-ups and monthly company-wide meetings.
Senior Full Stack Developer at Renting Cars / Agent Cars
January 1, 2018 - January 1, 2025Architected and scaled a global car rental engine processing high-volume transactions across multiple countries. Refactored legacy core systems, achieving a significant increase in system performance and reducing server-side latency. Led API integrations with international providers, ensuring 99.9% uptime and data consistency via REST and SOAP. Automated critical back-office workflows, reducing manual operational time by approximately 40%.
Education
Qualifications
Bachelor's Degree in Systems Engineering
January 11, 2030 - January 1, 2023Bachelor's Degree in Systems Engineering
January 11, 2030 - January 1, 2023Bachelor's Degree in Systems Engineering
January 11, 2030 - January 1, 2023Industry Experience
Software & Internet, Healthcare, Travel & Hospitality, Transportation & Logistics, Professional Services, Media & Entertainment
Skills
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