
Olivia Carter
Nodejs Backend Developer, REST API and API Integration
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Node.js Backend Developer
Self Employed • Freelance
Apr 2026 - Present • 4 mos
I develop and maintain custom backend solutions using Node.js, Express.js, REST APIs, and database technologies. My work includes building REST API endpoints, integrating third-party APIs and webhooks, implementing authentication, connecting databases, troubleshooting backend issues, and developing reliable server-side functionality for web applications and SaaS products. I focus on clean, maintainable code, secure API communication, proper validation, error handling, database integration, and reliable backend architecture. I also work with existing applications to extend functionality, improve API performance, and resolve integration or backend issues. Core technologies: Node.js, Express.js, JavaScript, REST API, MongoDB, MySQL, PostgreSQL, API Integration, Webhooks, JWT, and JSON.