Job Summary: Ibertech is seeking a Senior Back-End Developer to collaborate on an international project developed in NodeJS on AWS, with CDN experience. Key Highlights: 1. 100% English-language international project 2. Caching strategies and performance optimization 3. Evolution of integrations and CDN migration This is a remote position. At Ibertech, we are looking for a **Senior Back-End Developer (NodeJS + AWS + Fastly CDN)** profile with **fluent English** to collaborate with one of our leading clients. Location: Madrid, Spain (residency required). Work Mode: Remote **Job Description:** We are seeking a Senior Back-End Developer with extensive experience in **NodeJS** on **AWS**, to join a 100% English-language international project. **Requirements:** • 100% **English** project (advanced level required): ability to interact with the client and technical documentation in English. • Solid back-end development experience with **NodeJS**. • Experience working on **AWS**. • Experience with **CDNs**, especially **Fastly**. • Advanced knowledge of caching strategies, TTL, cache invalidation, SSO, and performance optimization in high-traffic environments. **Responsibilities:** • Propose strategies to reduce the need for daily cache purging at the event integration layer, optimizing the use of TTL, selective invalidations, and cache tagging. • Evolve the current Salesforce Native Forms integration—which currently relies on iframes—by designing a scalable solution based on custom APIs, considering security, authentication, SSO, performance, and compatibility with AEM EDS. • Configure and migrate the CDN from Adobe Managed CDN to Fastly, including cache policies, TTL, invalidation rules, SSO configuration, and best practices for high-traffic environments. If you believe you are a good fit and are interested in this opportunity, please send your updated CV along with your salary expectations to sara.gonzalez@ibertech.org, and we will contact you. We look forward to hearing from you!