Cryptography & Platform Security SWE

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Join a team of passionate thinkers innovators and dreamers and help us connect people and build communities to create economic opportunity for all.

About the team and the role:

eBays 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.

As 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 eBays distributed systems.

You will collaborate closely with platform and infrastructure teams to embed robust cryptographic protections into our services and help shape eBays long-term security posture.

What you will accomplish:

• Design and deliver cryptographic services and libraries that enable secure encryption digital signatures and key management for high-scale global platforms.

• Build and evolve systems using public key cryptography (such as RSA ECC and DSA) to support secure transactions identity and communications across distributed services.

• Develop and improve PKI infrastructure including certificate lifecycle management and trust frameworks to strengthen authentication and service-to-service trust.

• Integrate 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.

• Lead and participate in threat modeling security reviews and cryptographic design validation to proactively identify and mitigate risks.

• Improve the performance scalability and resilience of cryptographic operations in high-throughput environments while knowing the latest modern standards vulnerabilities and approaches.

What you will bring:

• Bachelors degree Masters 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.

• Proven hands-on experience with cryptographic algorithms and protocols including RSA ECC DSA and digital signatures applied in production systems.

• Strong understanding of public key infrastructure (PKI) certificate management and trust models in large-scale distributed environments.

• Proficiency in Java including experience using JCA/JCE or building secure J2EE-based applications that integrate cryptographic services.

• Experience 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.

• Ability to work from our San Jose 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.

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Additional Details

The base pay range for this position is expected in the range below:

Base 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.

If 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.

eBay 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 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 eBays 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.

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