• Payment Credential and Biometric Binding: Leveraged FIDO2 capabilities to enable cryptographically consented and non-repudiable payment authentications. #FIDO2 #OIDC• Certified FIDO2 Server: Architected the FIDO2 server foundation for payment passkeys. #FIDO2• Secure Traffic: Ensured end-to-end authenticated and encrypted traffic through key agreement schemes. #Security #NIST-800-56• Predicate-Based Authorization: Designed an authorization mechanism based on the evaluation of predicates using for their evaluation self-contained security tokens that carry variables such as time, authentication methods, applications, users, devices, and clients. #Security #Authorization #Performance #Availability #CBOR• Replay Attack Prevention: Mitigated replay attacks by enforcing session keys and conducting continuous user and device behavior analysis. #Security #NIST-800-56 #UEBA• Transferrable Session State: Maintained session state within client software for improved scalability and availability across data centers. #Scalability #Availability #CBOR• Component Independence: Designed independent components with clear responsibility boundaries across API gateways, session managers, security token managers, and identity providers. #Scalability #Extensibility• Tenant-Agnostic Features: Ensured the platform's universal features and behaviors are tailored to specific tenant needs only through configuration, allowing variations in execution logic. #Adaptability• Security Event Handling: Defined asynchronous notifications of security events and synchronous delegation for inline decisions when required. #Extensibility #SecurityEventToken• Adaptive Authorization: Traffic analyzed through diverse security lenses to contextually enforce decisions that prevent unauthorized access. #Adaptability #Authorization

• Open-Minded Solution Discovery: Dissecting complex systems, contrasting alternatives, clarifying reasoning and merits, listening to new perspectives, continuously adopting new knowledge, and gaining buy-in.• Attention to Detail: Strategically investing in the important details that, if neglected, could undermine future outcomes.• Unlimited Possibilities: Believing that "little by little, anything can be done," ensuring no limits are placed on what can be achieved.• Humility: Accepting that others may have better ideas and always letting the best idea prevail, regardless of its source.• Knowledge Sharing: Sharing knowledge deliberately and unselfishly for the benefit of the team, individuals, and the quality of the work being done.

• Adaptive Payments APIs: Contributed to the development of Adaptive Payments APIs, utilizing PayPal’s infrastructure to enable third-party developers to integrate payments seamlessly into their applications.• Java Batch Implementation: Pioneered the first Java batch implementation at PayPal, overcoming significant challenges in a predominantly C-based environment.• Permission API Enhancement: Developed a hierarchical mechanism to chain different sources of permission APIs. By leveraging a chain of responsibility pattern, this approach mitigated bottlenecks caused by the centralized, pace-limited original API, and incorporated unsupported permissions.• Traffic-Monitoring UI: Created a traffic-monitoring UI that visualizes the sequence of steps in any given flow through dynamic graph rendering.• High-Quality Code: Advocate for high-quality code through the implementation of design patterns such as singleton, template, strategy, factory, observer/observable, chain of responsibility, and command.

• Collaborated in a project sponsored by the SEI (Software Engineering Institute) to enhance OSATE, a tool used to manipulate AADL (Architecture Analysis and Design Language) models. These models are used in the automotive industry to evaluate system designs. The collaboration consisted in implementing the infrastructure to facilitate the transformation of models for interoperability and optimization purposes.• Created the architecture and design of the solution, while implementing a transformation framework for streamlining the creation of new model transformations.• Performed part of the implementation of a fault-tolerant sudoku game using middle-tier technology.

• Developed a data-firewall configuration tool which defines access-rules for establishing the permissions an authenticated user has over the data exposed by diverse manufacturing equipments. • Created the software requirements specification detailing the features of a new intranet used by BD Metrics’ operational team to support their core process. This included a tool that calculates customers’ affinities for finding new business contacts with complementary and/or similar interests.• Performed and presented to a leading convenience retailer the proof of concept that let us got a project to implement the transmission of their inventory data from a PDA to a Point of Sale system. Later, I carried out the development of this product that is now part of their more than 2,000 stores.

• Constructed the home delivery software 20/20D aimed at coordinating and controlling the day’s duties of each member of the fleet; resulting in the efficient delivery of the products purchased by the customer.• Coordinated and implemented the enhancements and fixes included in the AIM transport library from versions 4.0 to 4.3. AIM abstracts the complexities of diverse wireless protocols into a common API.

• Envisioned, architected and implemented a plug-in based solution to provide the foundations of a data management tool that supports the diverse needs of health specialists.• Carried out the promotion of the product including interviews, presentations, and demos with prospective investors, physicians, hospitals and pharmaceutical companies.

• Led the team in charge of developing the infrastructure for setting up the eGo web-store. Made by Silicon Valley based Encanto Networks, eGo was aimed at individuals who wanted to sell their products online.• Oversaw the definition and development of HP’s new proof of concept for Proposal Managers called ProposalJet. This solution formed part of HP’s strategy to market their corporate printers. The solution included the creation of a master document or proposal coming from documents with diverse formats.

• Conceived and constructed a highly visual decision support system which calculates and presents a group of indicators used by a chain of restaurants to measure the success of items in their menu.• Researched and detected the lack of products within the low-end health market and devised and built a solution that eases the handling of medical records in a typical doctor’s office.• Negotiated a deal with the prestigious medical publisher Editora Cientifica Medica resulting in the sale of more than 100 copies of Medisis.