Data Scientist II

Data Scientist 2Hybrid role- 3 days a week is a CJ office- Atlanta or ChicagoYou 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.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.ResponsibilitiesDo 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.QualificationsWhat 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 InformationCJ 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 EmploymentAll 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 BenefitsWe 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. Compensation Range: USD $87,210.00 - USD $125,265.00/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 11/26/2025.