Freelance Python Automation Engineer Jobs in Randolph, NJ

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Job Title

About your role:

As a Threat Detection & Automation Engineer, you will enable end-to-end detection engineering across telemetry onboarding, detection content development, response automation, and threat reporting within Cyber Security Operations at Fiserv. You will be a partner with threat intelligence, threat hunting, incident response, red team, platform, and engineering teams to build and operate resilient detection infrastructure and integrations at enterprise scale. Your work will strengthen detection fidelity, improve operational awareness, and help teams respond quickly to credible threats across the Fiserv environment.

What you'll do:

• Research adversarial techniques and translate threat behaviors into high-fidelity detections aligned to complex cybersecurity use cases.
• Design, build, and operate production-grade security detection infrastructure across Google SecOps and internal automation applications that support enrichment, orchestration, and response workflows.
• Lead telemetry and detection lifecycles, including source onboarding, parsing, normalization, enrichment, testing, deployment, tuning, and ongoing maintenance.
• Develop custom integrations, automations, and lightweight services using application programming interfaces (APIs), webhooks, and event-driven patterns to improve signal fidelity and reduce mean time to detect and mean time to respond.
• Create dashboards, metrics, and reports using business intelligence tools, structured query language (SQL), statistical analysis, and applied artificial intelligence and machine learning techniques to improve threat visibility and operational reporting.
• Apply Python, prompt-driven workflows, model context protocol (MCP) capabilities, and agent-to-agent orchestration patterns to support detection engineering, enrichment, and analytic decision support.
• Collaborate with threat intelligence, threat hunters, incident responders, red team, and engineering partners to evaluate detection coverage gaps and improve defensive capabilities.
• Manage work through Agile practices, documenting requirements, tracking delivery, and maintaining reliable platform operations across hybrid environments.

Experience you'll need to have:

• 8+ years of experience in cybersecurity engineering, security operations, or detection engineering, including building and maintaining detections for enterprise security environments.
• 8+ years of experience developing and tuning detections using security information and event management (SIEM) technologies, security orchestration, automation, and response (SOAR) platforms, and correlated rule logic for complex threat scenarios.
• 8+ years of experience scripting and automation development using Python, SQL, PowerShell, Bash, or similar languages to support integrations, telemetry processing, and response workflows.
• 8+ years of experience working with cybersecurity technologies such as endpoint detection and response (EDR), intrusion detection system or network detection and response (IDS/NDR), user and entity behavior analytics (UEBA), data loss prevention (DLP), web application firewall (WAF), proxy technologies, and cloud security services.
• Experience designing and supporting API integrations using representational state transfer (REST), JavaScript Object Notation (JSON), webhooks, OAuth, service accounts, and event-driven messaging patterns with measurable reliability and observability outcomes.
• Experience applying MITRE ATT&CK, detection coverage analysis, telemetry mapping, dashboard development, and threat reporting to improve cyber detection quality and operational awareness.
• Bachelor's degree in cybersecurity, computer science, information technology, engineering, or a related field, or equivalent combination of education, related experience and/or military experience.

Experience that would be great to have:

• Experience with Google SecOps in enterprise-scale detection engineering or security operations environments.
• Experience applying artificial intelligence, machine learning, feature engineering, prompt engineering, and AI-assisted coding to cybersecurity analytics, enrichment, or automation use cases.
• Experience with infrastructure as code, continuous integration and continuous delivery (CI/CD), Git-based workflows, and platform automation using tools such as Terraform.
• Industry certifications such as GIAC Certified Incident Handler, GIAC Security Operations Certified, GIAC Certified Intrusion Analyst, GIAC Penetration Tester, GIAC Defending Advanced Threats, or equivalent certification.

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 experiences help you with your overall onboarding experience and leads to stronger productivity.

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 including 401k match and discounted shares with the Employee Stock Purchase Plan.
• Tuition assistance and reimbursement program.
• Paid parental and military leave.

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Salary Range

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.

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 contactAskHR.US@fiserv.com. 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.