Jesús Daniel Medina Cruz
San Leandro, CA | jesus.daniel.medina.cruz@gmail.com | +1 (470) 406-1747 | jesusdmedinac.com

August 05, 2026

Hiring Team
Identity Team | Aptivist

Subject: Application for Full Stack AI Engineer – Identity

Dear Aptivist Team,

I am writing to express my strong interest in the Full Stack AI Engineer – Identity position. With 10 years of experience architecting highly scalable cross-platform solutions and robust backend systems, I am excited to help Aptivist build intelligent, secure, and scalable identity experiences. My background spans designing secure data services, implementing authentication pipelines, and delivering AI/ML solutions into production.

In my recent work, I have focused heavily on integrating AI-driven systems and secure data handling. For example, in Empry and Zora, I integrated AI conversational models and dynamic personalization features, ensuring strong security and data boundaries for user sessions. Additionally, while at Insulet Corporation, I architected scalable data processing and communication layers for health monitoring applications where strict privacy, identity management, and compliance were paramount.

Beyond core AI integration, my experience with modernizing codebases and building secure RESTful APIs—such as using Ktor for multi-platform consumption at Bubble and driving large-scale architectural redesigns at Wells Fargo—has equipped me to tackle complex identity workflows, SSO capabilities, and fraud detection integrations. I am highly comfortable across the entire stack, from defining backend security models to delivering seamless, performant frontend user experiences.

I would welcome the opportunity to discuss how my background in full-stack architecture, secure API design, and AI integration can support Aptivist’s Identity team. Thank you for your time and consideration.

Sincerely,

Jesús Daniel Medina Cruz