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CJ · 20 hours ago

Data Scientist II

Chicago, IL

Full-time

Hybrid

Mid Level

$87K/yr - $115K/yr

3+ years exp

CJ is a leader in the affiliate industry, known for its performance marketing solutions. In the Data Scientist II role, you will lead advanced analysis projects, ensuring data accuracy and delivering insights that drive growth across e-commerce, travel, and finance sectors.

AdvertisingMarketing

No H1B

Responsibilities

Lead and support advanced client-facing data science and analytics projects, including forecasting, incrementality measurement, and program optimization

Take ownership of project scoping, data querying and modeling, quality checks, and delivery of actionable insights

Analyze large-scale e-commerce and advertising datasets, demonstrating statistical and ML methods to uncover opportunities and support growth strategies

Design and interpret incrementality tests, marketing mix models (MMM), and lift tests to assess causal impact and optimize marketing spend

Build machine learning models, such as forecasting and inferential analysis, and implement solutions about LLM when relevant

Create and deliver Tableau dashboards and reporting that distill complex analysis into clear, actionable insights for both internal and external stakeholders

Collaborate with account teams, engineers, and other data scientists to design and implement scalable data solutions

Present technical findings and recommendations to non-technical audiences, demonstrating strong client-facing and communication skills

Qualification

Data SciencePySparkScalaTableauIncrementality TestingAd Tech ExperienceMarTech ExperienceMachine LearningGitLab/GitHubClient-facing SkillsCommunication Skills

Required

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 e-commerce, travel, and finance

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 collaborators

Preferred

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

Benefits

401K matching

Wellness programs

Comprehensive medical, dental, and vision coverage

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

Business Resource Groups, where employees connect over shared interests to cultivate an engaging, inclusive environment

Company

CJ

Glassdoor3.4

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 1998

Santa Barbara, California, USA

501-1000 employees