{"id":2529411,"url":"https://alion.io/job/ebay-cryptography-platform-security-swe","title":"Cryptography & Platform Security SWE","company":{"id":7519,"name":"eBay","domain":"ebay.com","url":"https://alion.io/company/ebay","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":80,"open_postings":34,"ghost_share":0,"stale_share":0.794,"repost_share":0,"time_to_fill_p50_days":24,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Austin, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":118800,"max":205600,"currency":"USD","period":"year","gross":null,"usd_annual":205600},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":true,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Java","optional":false},{"name":"PKI","optional":false},{"name":"Threat Modeling","optional":false}],"status":"live","first_seen_at":"2026-09-29T00:00:00Z","employer_posted_date":"2026-09-29","last_verified_at":"2026-11-04T02:54:06Z","board_verified":true,"closed_at":null,"days_open":36,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":36},"description":"At eBay, we're more than a global ecommerce leader - we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.\nOur customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work - every day. We're in this together, sustaining the future of our customers, our company, and our planet.\nJoin a team of passionate thinkers, innovators, and dreamers - and help us connect people and build communities to create economic opportunity for all.\n* This role cannot offer any sort of visa sponsorship *\nAbout the team and the role:\neBay’s Cloud Security Engineering team builds the foundational security services that protect our global marketplace. The team develops and operates secure, scalable cryptographic platforms that enable trusted transactions, secure communications, and strong identity guarantees across millions of users and services.\nAs a Senior Software Engineer - Cryptography & Platform Security, you will build and implement high-assurance cryptographic services that underpin authentication, digital signatures, key management, and secure data protection across eBay’s distributed systems.\nYou will collaborate closely with platform and infrastructure teams to embed robust cryptographic protections into our services and help shape eBay’s long-term security posture.\nWhat you will accomplish:\nDesign and deliver cryptographic services and libraries that enable secure encryption, digital signatures, and key management for high-scale, global platforms.\nBuild and evolve systems using public key cryptography (such as RSA, ECC, and DSA) to support secure transactions, identity, and communications across distributed services.\nDevelop and improve PKI infrastructure, including certificate lifecycle management and trust frameworks, to strengthen authentication and service-to-service trust.\nIntegrate cryptographic capabilities into Java-based services using JCA/JCE and hardware-backed security modules (for example PKCS#11, KMIP, TPM 2.0) to protect sensitive data and keys.\nLead and participate in threat modeling, security reviews, and cryptographic design validation to proactively identify and mitigate risks.\nImprove the performance, scalability, and resilience of cryptographic operations in high-throughput environments while knowing the latest modern standards, vulnerabilities, and approaches.\nWhat you will bring:\nBachelor’s degree, Master’s degree, or equivalent experience in Computer Science, Engineering, or a related field is required. Typically, 7+ years of software engineering experience with a focus on security and cryptography is needed.\nProven hands-on experience with cryptographic algorithms and protocols, including RSA, ECC, DSA, and digital signatures, applied in production systems.\nStrong understanding of public key infrastructure (PKI), certificate management, and trust models in large-scale, distributed environments.\nProficiency in Java, including experience using JCA/JCE or building secure J2EE-based applications that integrate cryptographic services.\nExperience implementing or integrating with key management standards and interfaces such as PKCS#11, KMIP, or similar protocols, and familiarity with secure coding practices and common cryptographic pitfalls.\nAbility to work from our Austin office (in a hybrid or onsite model as defined by eBay policy) and to collaborate optimally across security, platform, and infrastructure teams in a fast-paced environment.\n* This role cannot offer any sort of visa sponsorship *\nAdditional Details\nThe base pay range for this position is expected in the range below:\n$118,800 - $205,600Base pay offered may vary depending on multiple individualized factors, including location, skills, and experience. The total compensation package for this position may also include other elements, including a target bonus and restricted stock units (as applicable) in addition to a full range of medical, financial, and/or other benefits (including 401(k) eligibility and various paid time off benefits, such as PTO and parental leave). Details of participation in these benefit plans will be provided if an employee receives an offer of employment.\nIf hired, employees will be in an “at-will position” and the Company reserves the right to modify base salary (as well as any other discretionary payment or compensation program) at any time, including for reasons related to individual performance, Company or individual department/team performance, and market factors.\nRemote roles are not eligible for U.S. visa sponsorship.\neBay is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, veteran status, and disability, or other legally protected status. If you have a need that requires accommodation, please contact us at . We will make every effort to respond to your request for accommodation as soon as possible. View our accessibility statement to learn more about eBay's commitment to ensuring digital accessibility for people with disabilities. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.\nWe use cookies to enhance your experience and may use AI tools for administrative tasks in the hiring process. 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