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Architected and implemented the backend (in Golang microservices) for Sixt's Fastlane product, allowing customers to select their vehicle, start their rental, and unlock the car using the Sixt app. Served as the architect for the Reservation team working to modernize the product.

Architected and implemented the backend (in Golang microservices) for Sixt's new third party API, allowing external partners to integrate with Sixt's rental products. Regularly represented Sixt towards external business partners, serving as the technical contact person. Served as the technical lead and architect for the digital checkout initiative. Helped to drive a new security community of practice while designing and developing frameworks for common security patterns such as rate limiting. Together with other tech leads, developed organization-wide backend NFRs.

Architect for multiple development teams. Led a new application security team, designing security best practices, performing vendor evaluations, providing frameworks, and performing security consultations and penetration tests. Designed and built in-house automated security scanners to proactively and automatically detect common security issues such as insufficient access controls and hardcoded credentials.

Independently deliver and collaborate on high-impact, complex engineering efforts while improving and maintaining the software ecosystem. Actively mentor engineers and provide deep technical guidance to Directors, VPs, and the CTO through design and implementation work. Create and drive application and product security initiatives, including secure code reviews, threat modeling, vulnerability analysis, and remediation; proactively identify and mitigate risks, and participate in security incident detection and response. Implement, scale, and operate application and product security frameworks and tooling, integrating security controls into development workflows, CI/CD pipelines, and runtime environments.