Senior Cyber Security Engineer

Sr. Cyber Security Engineer at Fiserv designing and building an enterprise browser platform.

Posted 5/5/2026full-timeBerkeley Heights • Florida, New Jersey, New York • 🇺🇸 United StatesSenior💰 $128,000 - $216,000 per yearWebsite

Tools & technologies

Cyber SecurityDistributed SystemsGoJavaRust

Key responsibilities & impact

Serve as a Sr. Cyber Security Engineer responsible for designing, building, and evolving our internal enterprise browser platform.
Work closely with security architecture, identity, networking, and AI governance teams to embed policy enforcement, visibility, and controls directly into the browser runtime.
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.
Implement browser-level security mechanisms, including session isolation, in-browser access enforcement, and data protection controls.
Develop services that collect, interpret, and act on device posture, endpoint telemetry, and user identity.
Create browser-mediated abstractions and capabilities such as AI usage classification and risk scoring.
Troubleshoot and debug complex issues across browser runtime, network stack, operating system integrations, and identity layers.

What you’ll need

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 (HTTP/S, TLS, proxy architectures) and authentication and authorization flows (OAuth, SAML, 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.
Bachelor’s degree or degree in Computer Science, Engineering or related field or equivalent combination of education, related experience and/or military experience.

Comp & perks

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.

ATS Keywords

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Hard Skills & Tools

C++RustGoJavaHTTP/STLSOAuthSAMLOIDCbrowser security mechanisms

Soft Skills

analytical skillsdebugging skills