Data Scientist II

Company Description

Hybrid role- 3 days a week is a CJ office- Atlanta or Chicago

You must be work authorized in the United States without the need for employer sponsorship.

Must have Ad Tech / MarTech industry experience, specifically in e-commerce, travel, and finance.

From helping to invent the affiliate industry, to performance marketing and what comes next, we've earned a reputation for maintaining the largest, most reliable partnership-based platform and sterling service with a personal touch.


With over 27 years of experience and 1,000+ associates across 7 different countries, CJ (formerly Commission Junction) is the most trusted and established name in performance marketing.


We specialize in cultivating partnerships between top brands and trusted publishers to help them drive revenue and grow their businesses. CJ's industry-leading solutions and services are what makes our innovative marketing technology ("martech") the platform of choice for over 3,800 global brands across all industries including retail, travel, finance, technology, and home services. As part of Publicis Groupe, our data capabilities, future-focused tech, and strategic expertise power meaningful connections so brands can reach consumers wherever they are.


We take just as much pride in our innovative technology and comprehensive data as we do in the expertise and dedication of our people. Our collaborative teams are equipped with advanced tools, training, and career development opportunities in order to provide our clients with cutting edge solutions, strategies, and support that drive meaningful results. In an industry with much uncharted territory, our people are a trusted a steady hand.


So, what is Affiliate Marketing?


Think about the last time you bought something online. Maybe your favorite influencer shared a product that caught your eye with a coupon to help save you some cash, or perhaps you already knew what you wanted to buy, but there were so many options that you needed help from a trusted review site. However you finally made your purchase, chances are you interacted with affiliate publishers along the way-whether they influenced you, provided helpful information, or made sure you got the best price, CJ provides the performance marketing platform that connects brands with publishers to create valuable resources frequently used by shoppers such as yourself.


Here's why you'll love working here!


In addition to competitive salaries, 401K matching, wellness reimbursement programs, life insurance, comprehensive medical, dental and vision coverage, we also offer...

• Flexible time off, no accrual necessary
• Generous amount of paid holidays
• Company-sponsored team building events
• Employee Referral Program
• Annual recognition awards
• Flexible work arrangements
• Parental bonding leave
• Back-up child/elder care
• Employee discount program
• Work Your World
• Business Resource Groups- these employee-led groups join together around common interests, backgrounds, or demographic factors to help build an engaging, inclusive work environment for all.

... just to name a few of our great perks!


Overview

In this client-facing Data Scientist 2 role at CJ, you will support and lead advanced analysis projects for individual clients and internal collaborators within the Data Science organization. You will take ownership of complex projects end-to-end, ensuring data accuracy while delivering actionable insights that drive advertising program growth across e-commerce, travel, and finance verticals. Collaborating with cross-functional teams, you will interact directly with clients to translate business needs into impactful data science solutions. You'll tap into your expertise in PySpark, Scala, Tableau, advanced measurement (incrementality, MMM, lift testing), and modern AI/ML techniques-including large language models (LLMs)-to develop, visualize, and communicate analyses that enable data-driven decision-making in a dynamic digital advertising landscape.

Responsibilities

Do these things interest you? You will:

• 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 passionate about LLM when relevant.
• Create and deliver Tableau dashboards and reporting that distill complex analysis into clear, actionable insights for both internal and external collaborators.
• 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.

Qualifications

What we look for:

• 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).
• Preferred: Experience implementing LLMs into business workflows, including training, fine-tuning, and manipulation for applied use cases.
• 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.

Additional Information

CJ is the leader in Performance Marketing. We take pride in our innovative technology, comprehensive data solutions and our people. We equip our teams with advanced tools, training and career development opportunities all to provide modern solutions, strategies and support to deliver high quality results for our clients. We work in an energetic, results-oriented, collaborative, team environment that recognizes exceptional performance. As we evolve and grow as a business, so do you.


We're a community of creative and passionate problem solvers who go the distance to tackle the tough questions, think creatively, and drive intelligent growth, for our clients-and ourselves. We foster and embody an inclusive and collaborative culture where diverse perspectives are sought, relationships are valued, and people feel accepted with a sense of belonging in expressing themselves authentically. We pride ourselves in having a workplace environment that values both work and play. Business Resource Groups, Fun team outings, office events, and flexible time off mean a work life balance with colleagues that turn into lifelong friends.

Conditions of Employment

All job offers are contingent upon successful completion of certain background checks which unless prohibited by applicable law may include criminal history checks, employment verification, education verification, drug screens, credit checks, DMV checks (for driving positions only) and fingerprinting.

Great People Deserve Great Benefits

We know that we have some of the brightest and most dedicated associates in the world, and we believe in rewarding them accordingly. If you work here, expect competitive pay, comprehensive health coverage, and endless opportunities to advance your career.

Compensation Range: $87,210 - $115,000 annually. This is the pay range the Company believes it will pay for this position at the time of this posting. Consistent with applicable law, compensation will be determined based on the skills, qualifications, and experience of the applicant along with the requirements of the position, and the Company reserves the right to modify this pay range at any time. Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan through a third-party benefits administration system once certain criteria have been met. Temporary roles may also qualify for participation in our 401(k) plan after eligibility criteria have been met. For regular roles, the Company will offer medical coverage, dental, vision, disability, 401k, and paid time off. The Company anticipates the application deadline for this job posting will be 11/7/25.

All your information will be kept confidential according to EEO guidelines.