Sr. Cyber Security Engineer

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

Sr. Cyber Security Engineer

About your role:

You will serve as a Sr. Cyber Security Engineer responsible for designing, building, and evolving our internal enterprise browser platform with a focus on secure, centrally governed access to generative AI tools. You will work closely with security architecture, identity, networking, and AI governance teams to embed policy enforcement, visibility, and controls directly into the browser runtime, enabling secure-by-design application delivery across the enterprise.

What you'll do:

• Design, develop, and maintain enterprise browser features and system components that support secure access to internal and external applications.

• Build integrations between the enterprise browser and security ecosystems, including endpoint security and device management, network security technologies, and identity and access management solutions.

• Implement browser-level security mechanisms, including session isolation, in-browser access enforcement, authentication and authorization workflows, and data protection and policy controls.

• Develop services that collect, interpret, and act on device posture, endpoint telemetry, and user identity and contextual access information.

• Design and implement a browser-level AI Controls Framework that governs enterprise use of generative AI tools (for example, Gemini, Claude, Grok, OpenAI), including centralized policy enforcement, isolation of sensitive data, guardrails for data submission and exfiltration, and instrumentation for AI interactions.

• Create browser-mediated abstractions and capabilities such as AI usage classification and risk scoring, approved model routing, dynamic masking and redaction, and identity-bound usage controls to reduce the need for direct integration with each AI provider.

• Troubleshoot and debug complex issues across browser runtime, network stack, operating system integrations, and identity layers while contributing to performance tuning, reliability engineering, and platform scalability.

• Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.

Experience you'll need to have:

• 6+ years of experience in software engineering in systems, platforms, or security-focused development environments.

• 6+ years of experience with one or more system-level languages such as C++, Rust, Go, Java, or similar object-oriented or systems programming languages.

• 5+ years of experience working with network protocols ( TLS, proxy architectures) and authentication and authorization flows (OAuth, Security Assertion Markup Language (SAML), OpenID Connect (OIDC)) in enterprise environments.

• 4+ years of experience integrating with enterprise security and access control systems such as endpoint security, device management, secure web gateways, private application access, or security infrastructure APIs.

• Experience with browser concepts such as rendering engines and runtime components, extensions or embedded browser frameworks, and network traffic interception and inspection models.

• Strong analytical and debugging skills across distributed systems, including complex interactions between browser, network, identity, and operating system layers.

• Bachelor's degree or degree in Computer Science, Engineering or related field or equivalent combination of education, related experience and/or military experience.

Experience that would be great to have:

• Experience with Chromium-based architectures or commercial enterprise browsers such as Island.

• Background in endpoint security, application security, network security, and/or Zero Trust architectures.

• System integration experience with both Windows and macOS platforms.

• Knowledge of secure coding practices, threat modeling, software hardening, and security compliance or regulated-industry requirements.

• Exposure to AI or machine learning governance, data protection controls, or secure enterprise adoption of large language model (LLM) technologies.

How you'll 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 experience helps you with your overall onboarding experience and leads to stronger productivity.

Travel: This role requires occasional travel (up to 10%).

Sponsorship:

You must currently possess valid and unrestricted U.S. work authorization to be considered for this role. Individuals with temporary visas including, but not limited to, F-1 (OPT, CPT, STEM), H-1B, H-2, or TN, or any candidate requiring sponsorship, now or in the future, will not be considered for this role.

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.

Salary Range

$128,000.00 - $216,000.00

These pay ranges apply to employees in New Jersey and New York. 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.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.

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 View email address on click.appcast.io . Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv's Disability Accommodation Policy for additional information.

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

Warning about fake job posts:

Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.