Principal, Systems Engineer

Shape the Future with Dun & Bradstreet

At Dun & Bradstreet, we believe data has the power to create a better tomorrow. As a global leader in business decisioning data and analytics, we help companies worldwide grow, manage risk, and innovate. For over 180 years, businesses have trusted us to turn uncertainty into opportunity. We're a diverse, global team that values creativity, collaboration, and bold ideas. Are you ready to make an impact and help shape what's next? Join us! Explore opportunities at dnb.com/careers.

We are looking for a hands-on technical lead to own and scale large-scale IP-to-business entity attribution capabilities.

The Principal, Systems Engineer will work with internet intelligence datasets covering billions of IP addresses and help determine which signals can be reliably associated with businesses, organizations, and commercial entities. The role requires strong judgment in large-scale data attribution, entity resolution, quality control, and production data workflows.

The Principal, Systems Engineer is not primarily a cloud infrastructure role. It is a large-scale data attribution and quality role at the intersection of IP intelligence, business identity, and production data engineering.

Required Experience:

• Strong experience working with large-scale IP, domain, internet infrastructure, cyber intelligence, adtech, threat intelligence, fraud, or similar datasets.
>
• Hands-on experience resolving technical internet signals to real-world entities, companies, organizations, or business locations.
>
• Strong SQL skills for large-scale data analysis, joins, filtering, deduplication, quality checks, and exception analysis.
>
• Strong Python skills for data processing, automation, file handling, matching logic, validation workflows, and repeatable pipelines.
>
• Working knowledge of IP address ranges, ASNs, BGP/routing behavior, DNS, reverse DNS, domains, hosting infrastructure, cloud providers, CDNs, ISPs, and IP geolocation.
>
• Ability to distinguish business-owned infrastructure from infrastructure that is residential, consumer, mobile, proxy/VPN, cloud-hosted, CDN, parked, stale, or otherwise weakly attributable.
>
• Experience working with messy, high-volume data where the answer is probabilistic rather than perfectly deterministic.
>
• Strong judgment in entity resolution: knowing when to map, when not to map, when to lower confidence, and when to escalate for review.
>
• Ability to document rules, assumptions, confidence logic, QA findings, and repeatable workflows clearly.
>

Responsibilities:

• Operate comfortably with very large-scale IP and internet intelligence datasets, including files covering billions of IP addresses.
>
• Understand how to assess whether internet infrastructure is meaningfully attributable to a business, organization, or commercial entity.
>
• Apply strong technical judgment to distinguish business-relevant infrastructure from consumer, residential, mobile, cloud-hosted, CDN, proxy/VPN, parked, stale, or otherwise weakly attributable signals.
>
• Work across IP-level, domain-level, routing, hosting, geolocation, and other internet-layer signals to support high-quality business entity attribution.
>
• Build and maintain repeatable data-processing workflows that support ingestion, normalization, analysis, validation, quality review, and delivery of large-scale attribution outputs.
>
• Use SQL and Python to analyze large datasets, identify signal patterns, automate repeatable steps, investigate exceptions, and support scalable production processes.
>
• Develop practical rules, heuristics, confidence logic, and review frameworks for working with noisy, incomplete, or conflicting attribution signals.
>
• Evaluate the quality, coverage, freshness, explainability, and commercial usefulness of third-party IP intelligence and internet-signal data sources.
>
• Partner effectively with product, data science, engineering, customer-facing, and data operations teams to translate attribution work into reliable business outputs.
>
• Produce clear documentation of assumptions, quality standards, confidence levels, known limitations, and operational procedures.
>
• Support customer-facing and downstream product use cases by ensuring outputs are reliable, explainable, and fit for purpose.
>
• Provide technical guidance to analysts or junior engineers involved in validation, exception review, quality control, or recurring production workflows.
>

Education:

• Bachelor's degree in Computer Science, Information Systems, Engineering or a related field is required and master's degree Preferred

Benefits We Offer

• Generous paid time off in your first year, increasing with tenure.

• Up to 16 weeks 100% paid parental leave after one year of employment.

• Paid sick time to care for yourself or family members.


• Education assistance and extensive training resources.

• Do Good Program: Paid volunteer days & donation matching.


• Competitive 401k with company matching.

• Health & wellness benefits, including discounted Wellhub membership rates.

• Medical, dental & vision insurance for you, spouse/partner & dependents.

All Dun & Bradstreet job postings can be found at Official communication from Dun & Bradstreet will come from an email address ending in @dnb.com.

Notice to Applicants: Please be advised that this job posting page is hosted and powered by Lever, a subsidiary of Employ Inc. Your use of this page is subject to Employ's Privacy Notice and Cookie Policy, which governs the processing of visitor data on this platform.

Equal Employment Opportunity (EEO) : Dun & Bradstreet provides equal employment opportunities to applicants and employees without regard to race, color, religion, creed, sex, age, national origin, citizenship status, disability status, sexual orientation, gender identity or expression, pregnancy, genetic information, protected military and veteran status, ancestry, marital status, medical condition (cancer and genetic characteristics) or any other characteristic protected by law. Know Your Rights: Workplace Discrimination is Illegal - The current poster can be found here. We participate in E-Verify - The current poster can be found here.

Accommodations information for applicants with disabilities : Dun & Bradstreet is committed to providing reasonable accommodation to, among others, individuals with disabilities and disabled veterans. If you need an accommodation because of a disability to search and apply for a career opportunity with Dun & Bradstreet, please send an e-mail to [email protected] to let us know the nature of your accommodation request and your contact information.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please visit