In addition to solid technical skills, candidates should have strong interpersonal and communication skills, be self starters that are comfortable with the unknown and are capable of mentoring engineers and more junior security teammates.4+ years of relevant industry experience shipping critical deliverables Proficiency in Java and Swift or other object-oriented languages and accompanying frameworks Solid understanding in cryptographic primitives, such as PKI, ASN1, x.509, authentication protocols, key exchange protocols, and PQC algorithms Outstanding verbal and written communication skillsProven track records in designing, leading and shipping mission-critical security service in Java or Swift that runs at a global scale Proven track records in leading large cross-functional teams in mission-critical initiatives Proven track records in designing, implementing, and supporting large scale security systems that are in production today Proven track records in presenting to senior leadership and executives, ability to read the room and represent project team appropriately. Supporting 2.5 billion active Apple devices, processing billions of secure transactions, and keeping the technology that defines modern life running flawlessly, IS&T makes the impossible feel effortless.