Staff Engineer - DeviceOS SecureOS Development

Calling all innovators - find your future at Fiserv.

We're 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, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Staff Engineer - DeviceOS SecureOS Development

What does a successful Staff Engineer - DeviceOS SecureOS Development do at Fiserv?

The Clover DeviceOS team is at the core of our platform, building the software that powers every Clover device and ensures seamless manufacturing of tens of thousands of devices each month. As a Staff Engineer, you’ll play a pivotal role in shaping our vision, driving innovation, and delivering high-quality solutions that enhance the experience for millions of users. If you’re a hands-on engineer with a passion for cutting-edge technology, agile development, and solving complex challenges, we’d love to have you on our team!

What you will do:

• You create technical solutions from the ground up—writing product requirements, designing system architecture, and collaborating with Product and Engineering to bring it all to life.
• You develop and customize the secure operating system that powers Clover’s point-of-sale devices, making them fast, reliable, and safe to use.
• You dive deep into PCI-PTS and PCI-PIN standards, building features that meet the highest levels of security and compliance.
• You write embedded software with a strong focus on Android, object-oriented design, and hardware abstraction layers.
• You solve tough problems around cryptography, ensuring our systems handle sensitive data securely and efficiently.
• You port and optimize crypto algorithms to run seamlessly on embedded platforms—balancing power, performance, and security.
• You work hand-in-hand with cross-functional teams to launch new hardware platforms and shape the future of Clover devices.
• You partner with our manufacturing teams and build tools that guarantee secure, high-volume production of our devices.

What you will need to have:

• Bachelor's Degree (preferably Computer Science or Engineering) or equivalent combination of experience, education and military. 
• 5+ years of software development experience, with a focus on security and secure consumer electronic devices.
• Hands-on experience securing operating systems, including security hardening and threat mitigation.
• Experience coding in C and at least one additional programming language such as Java, Kotlin, or Python.
• Experience in asymmetric crypto algorithms.
• Deep understanding of security protocols, encryption/decryption technologies, PKI, HSM, certificate management, TLS, and mTLS.
• Experience working with programming languages requiring manual memory management.
• Proficiency in revision control and code review tools like Git and Gerrit.

What would be great to have:

• Experience working with Java security APIs.
• Experience in Physical security, Payment security standards, TrustZone and Android keystore.
• Experience with developing a certified/regulated product (PCI, medical, automobile, high assurance computing, etc.).

Important info about this role:  

• We’re better together. This role is fully on-site.
• In order to be considered, you must be legally authorized to work in the U.S. without need for sponsorship now or in the future.

Salary Range

$124,300.00 - $213,100.00

These pay ranges apply to employees in New York and California. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's 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