What You’ll Do
Build and enhance cryptographic libraries, integrations, and service components that support encryption, digital signatures, and secure key management.
Develop and maintain software systems that use public key cryptography, including RSA, ECC, and digital signature workflows.
Contribute to PKI, certificate-management capabilities, and trust frameworks used by internal platforms and services.
Implement extensible, maintainable software solutions for secure service integrations and platform capabilities.
Support production readiness through testing, monitoring, operational improvements, and continuous integration practices.
Translate feature requests into design options, engineering tasks, and effort estimates for the team.
Participate in threat modeling, security reviews, and validation of cryptographic designs and implementation choices.
Improve the performance, scalability, and resilience of cryptographic operations in distributed, high-throughput systems.
Stay current with modern cryptographic standards, vulnerabilities, and secure development best practices.
Must-Have Qualifications
Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
5+ years of software engineering experience, with meaningful hands-on work in security, cryptography, or secure platform development.
Strong programming skills in Go, Java, or C++, with the ability to build production-quality backend software.
Hands-on experience with cryptographic concepts and algorithms such as AES, RSA, ECC, DSA, and digital signatures.
Strong understanding of PKI, certificate management, and secure key handling concepts.
Experience with secure application development using technologies such as JCA, JCE, or similar security libraries and frameworks.
Familiarity with PKCS#11, KMIP, or similar key management protocols and integrations.
Good understanding of distributed systems, secure service design, and secure coding practices, including common cryptographic pitfalls.
Experience working independently on components or sub-systems, with accountability for delivery, quality, and production support.
Nice-to-Have Qualifications
Experience with hardware-backed security, HSM integrations, or TPM-related capabilities.
Exposure to modern cryptographic evolution areas such as post-quantum cryptography.
Familiarity with AI-assisted engineering tools such as GitHub Copilot or Claude, with sound judgment around code quality, security, and performance.
Why This Role Matters
This role is an opportunity to help build and evolve the security foundations that underpin eBay’s marketplace at scale. As a Software Engineer 3, you will own meaningful technical scope within the team, deliver secure and reliable software end to end, and contribute to the continued strength of eBay’s cryptographic and platform security capabilities.
Additional Details
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 status. If you have a need that requires accommodation, please contact us at talent@ebay.com. 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.
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