Data Scientist II, MarTech

Chicago, IL (Hybrid)

$89K/yr – $127K/yrSenior Level3+ years expFull time

Posted 4 months ago

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Job Summary

Drive enterprise data science and analytics for paid media and lead gen, delivering forecasting, incrementality, and reliable reporting at scale.

  • Must-have: PySpark/Tableau experience and 3–5 years in data science
  • Must-have: Ad Tech/MarTech background in e-commerce, insurance, travel, or finance
  • Standout: Proven ability to deliver scalable data solutions in a complex enterprise, with client-facing delivery

Job Description

Responsibilities

  • Lead and support advanced client-facing data science and analytics projects within a complex enterprise digital advertising environment, including forecasting, incrementality measurement, and program optimization.
  • Own end to end data reliability and validation processes, including oversight of medallion layer data structures, quality controls, data transfers, uptime monitoring, and ensuring timely, accurate delivery of data to support client reporting and decision making.
  • Take ownership of project scoping, data querying and modeling, quality checks, and delivery of actionable insights, developing a deep understanding of client integrations, attribution logic, and performance drivers.
  • Analyze large-scale e-commerce and advertising datasets, leveraging statistical and ML methods to uncover opportunities and support growth strategies across paid media and lead generation programs.
  • Design and interpret incrementality tests, marketing mix models (MMM), and lift tests to assess causal impact, inform bidding and budget allocation strategies, and optimize marketing spend.
  • Develop machine learning models, including forecasting and inferential analysis, and implement LLM-driven solutions where applicable to improve analytical workflows and delivery.
  • Create and deliver Tableau dashboards and reporting that distill complex analysis into clear, actionable insights for both internal and enterprise collaborators.
  • Collaborate with account teams, engineers, and other data scientists to design and implement scalable data solutions across integrated marketing ecosystems.
  • Present technical findings and recommendations to non-technical audiences, demonstrating strong client-facing and communication skills in high-visibility environments.

Requirements

  • 3–5 years of professional experience in Data Science and Analytics.
  • 2+ years of hands-on experience with PySpark, Scala, and Tableau.
  • Must have Ad Tech / MarTech industry experience, specifically in Insurance, e-commerce, travel, or finance.
  • Strong understanding of digital advertising practices, including media buying, bidding strategies, and lead generation economics.
  • Experience operating within complex, enterprise-level marketing organizations with integrated data environments.
  • Strong client-facing experience, including presentations and solution delivery.
  • Proven ability to deliver scalable data solutions and actionable insights in digital advertising or affiliate marketing.
  • Proficiency with GitLab or GitHub for version control and collaborative development.
  • Experience developing alongside LLM code assistants (e.g., Copilot, Claude, Codex).
  • Experience with incrementality testing, MMM, and lift test design and analysis.
  • Strong communication skills with the ability to simplify and explain complex technical results to non-technical stakeholders.
  • You must be work authorized in the United States without the need for employer sponsorship.

Preferred

  • Experience implementing LLMs into business workflows, including training, fine-tuning, and applied use cases.

Benefits

  • Flexible time off without the hassle of accrual
  • A generous number of paid holidays
  • Company-sponsored team-building events
  • An Employee Referral Program
  • Annual recognition awards
  • Hybrid work arrangements for optimal work-life balance
  • Parental bonding leave
  • Backup care options for children and elders
  • An employee discount program
  • International SOS program for global support
CJ logo

CJ

3.3 Glassdoor

From pioneering affiliate marketing to powering the future of connected commerce, CJ has been the trusted leader in partnership-based growth since 1998.Founded in Santa Barbara, California, CJ (formerly Commission Junction) is the world’s most established performance marketing platform, trusted by over 3,800 global brands across retail, travel, finance, and home services. Our technology and expertise connect 167K+ publishers and brands to billions of consumers worldwide, driving measurable, profitable growth.As part of Publicis Groupe, and aligned with Publicis Media, we unite data, technology, and strategic expertise to deliver a truly customer-centric approach. With a legacy of innovation and a vision for what’s next, CJ continues to set the standard for performance marketing — building partnerships that scale, campaigns that perform, and commerce that connects.

Founded in 1998
Santa Barbara, California, USA
1.7K employees (352 in marketing)
55% recommend to a friend
53% CEO approval

Traffic Signals

Monthly Visitors
1.5M
Traffic Source Mix
Search
21.1%
Direct
63.4%
Referral
10.8%
Social
1.9%
Paid
2.6%

Headcount Trend

Current headcount: ~1.7K

Marketing Team

Marketing Team Size
319 (18% of company)
Marketing Roles Posted (Last 30 Days)
10

Funding

Total Funding
$40M
Last Raise
$40M
Non Equity Assistance, 22 years ago

Funding History

  • Dec 2003
    Non Equity Assistance • $40M