Sr. Security & Test Engineer Device OS (PKI & Firmware Security)

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Were Fiserv a global leader in Fintech and payments and we move money and information in a way that moves the world. We connect financial institutions corporations merchants and consumers to one another millions of times a day - quickly reliably and securely. Any time you swipe your credit card pay through a mobile app or withdraw money from the bank were involved. If you want to make an impact on a global scale come make a difference at Fiserv.

Job Title

About your role:

Clover a Fiserv company is a global leader in point-of-sale platforms powering millions of small businesses worldwide with integrated hardware software and payment this role you will join the DeviceOS team which owns all platform software secure boot infrastructure and mass manufacturing software running on Clover hardware. You will design build and execute security validation strategies manage embedded PKI/HSM trust architectures and ensure our POS devices meet strict regulatory and cryptographic compliance standards.

What youll do:

• Design develop and execute comprehensive security and testing strategies for the Device OS powering Clover Point of Sale devices.
• Manage and validate PKI infrastructure Certificate Authority (CA) lifecycles and Hardware Security Modules (HSMs) for secure device provisioning and key management.
• Take direct accountability for overall platform security vulnerability management and operational quality across Clover hardware product lines.
• Interpret PCI-PTS and PCI-PIN specifications to design and execute compliance penetration testing and risk validation workflows.
• Audit and secure CI/CD build pipelines automated deployments and golden images to maintain end-to-end supply chain security.
• Troubleshoot complex issues related to embedded cryptography TLS/mTLS certificate lifecycle tools and secure bootloaders.
• Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.

Experience youll need to have:

• 5 years of professional experience in Software Security PKI Engineering AppSec or Software QA/Testing.
• Deep hands-on experience with Public Key Infrastructure (PKI) Certificate & Key Management and Hardware Security Modules (HSMs e.g. Thales).
• Strong domain knowledge of security protocols symmetric/asymmetric encryption TLS/mTLS and digital certificates.
• Experience with vulnerability management security scanning tools and risk assessments within Linux Android (AOSP) or cloud/embedded infrastructure.
• Practical scripting skills (Python PowerShell or Bash) to automate security workflows log extraction and diagnostic testing.
• Familiarity with secure CI/CD pipelines version control and infrastructure orchestration (Jenkins GitHub Actions Terraform Jira).
• Excellent communication skills with the ability to partner across engineering GRC and product teams to remediate findings.

Experience that would be great to have:

• Experience validating software or hardware for certified/regulated standards (PCI-PTS PCI-PIN SOC 2 or ISO 27001).
• Hands-on exposure to penetration testing tools (e.g. BurpSuite Metasploit) or cloud security posture management (e.g. Wiz AWS SSM).
• Experience with Android test frameworks (UIAutomator adb debugging Logcat analysis).
• Prior experience managing supply chain security golden image retention or mass manufacturing provisioning software.

How youll work:

• This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
• This role requires use of a computer and audio equipment.

Benefits at Fiserv:

• Fuel Your Life program to support your physical financial social and emotional well-being
• Paid holidays and generous time away policies
• No-cost mental health support through Employee Assistance Programs
• Living Proof program to recognize your peers extra effort with points redeemable for rewards
• Eight Employee Resource Groups to foster a collaborative culture and expand your network
• Unparalleled professional growth with training development and internal mobility opportunities
• Medical dental vision life and disability insurance options available from day one
• Retirement planning and discounted shares with the Employee Stock Purchase Plan
• Tuition assistance and reimbursement program
• Paid parental caregiver and military leave

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Salary Range

These pay ranges apply to employees in Sunnyvale California. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individuals status as a veteran.

Thank you for considering employment with Fiserv. Please:

• Apply using your legal name
• Complete the step-by-step profile and attach your resume (either is acceptable both are preferable).

Our commitment to Equal Opportunity:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race color religion national origin gender gender identity sexual orientation age disability protected veteran status or any other category protected by law.

If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process please contact. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiservs Disability Accommodation Policy for additional information.

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