Tatari Data Scientist interview questions & guide 2026

The following questions reflect patterns observed in previous interview cycles. While specific technical challenges may change, the focus on statistical rigor, data wrangling, and practical problem-solving remains consistent.

Coding and Technical Proficiency

These questions test your ability to manipulate data efficiently and demonstrate fluency in standard data science tools.

• Write a function to perform complex data wrangling on an array or dataframe.
• How would you handle missing data or outliers in a large advertising dataset?

Preparation for Tatari requires a balanced approach. You must be technically sharp, but you must also be capable of explaining the "why" behind your technical choices.

Technical Competency – You will be evaluated on your mastery of Python and SQL. Expect these to be tested not just in isolation, but through practical, data-heavy tasks that mirror the actual work performed by the team.

Analytical Communication – The ability to present your findings clearly is as important as the code you write. You should be ready to defend your methodology, explain your assumptions, and articulate how your analysis solves a specific business problem.

Structured Problem Solving – Tatari values candidates who can take an open-ended, messy problem and break it down into logical, manageable components. Focus on showing your thought process, even when you are unsure of the final answer.

The interview process at Tatari is designed to be rigorous and comprehensive, often spanning several weeks. It typically begins with an initial screening call to discuss your background, followed by a technical assessment. You should expect a mix of live coding sessions, analytical case studies, and, in many cases, a take-home assignment followed by a presentation to the team.

The process is highly collaborative once you reach the later stages. You will likely interact with multiple members of the data science and product teams, who will evaluate both your technical output and your ability to work within their specific team culture. The pace can be intense, and you should be prepared to invest significant time into the technical components of the assessment.

This timeline illustrates the progression from initial screening to final presentation. Candidates should view the take-home phase as a critical evaluation point where your ability to synthesize data into a presentation is tested; ensure you allocate sufficient time to polish your communication, not just your code.

Technical Execution

This area focuses on your ability to write clean, maintainable, and efficient code. You will be evaluated on your mastery of libraries like pandas and your ability to write complex SQL queries under time constraints.

Be ready to go over:

• Data cleaning and preprocessing workflows.
• Performance optimization for large datasets.

As a Data Scientist at Tatari, your primary responsibility is to transform raw media data into actionable insights for clients. You will spend a significant portion of your time wrangling data, building and refining attribution models, and creating visualizations that help clients understand their return on investment.

You will work closely with product managers and engineers to ensure that the data pipelines you rely on are accurate and that the models you develop can be integrated into the Tatari platform. This role involves a high degree of ownership; you are expected to not only execute tasks but to suggest improvements to the existing dashboard and analytical framework.

A strong candidate for this role possesses a blend of deep technical skill and a pragmatic business sense.

• Must-have skills:
• Advanced proficiency in Python and pandas.
• Strong SQL skills for complex data extraction and manipulation.
• Experience with statistical modeling and data visualization.
• Ability to communicate complex analytical results to non-technical stakeholders.
• Nice-to-have skills:
• Prior experience in the advertising technology (AdTech) space.
• Familiarity with cloud-based data warehouses (e.g., Snowflake, BigQuery).
• Experience building and maintaining production-level data models.

Q: How long should I expect the entire process to take? The process typically lasts 2–4 weeks. Factors like team availability and the complexity of the take-home assignment can influence the speed of progression.

Q: Is the take-home assignment mandatory? Yes, in most cases, the take-home assignment is a core component of the evaluation. It is used to gauge your technical depth and your ability to communicate findings in a presentation format.

Q: What is the best way to stand out? Focus on the "business impact" of your work. While your code must be correct, the candidates who succeed are those who can explain why their analysis matters to the client and how it drives better decision-making.

Q: Will I receive feedback if I am not selected? Feedback policies vary by team, but candidates have reported that receiving detailed, constructive feedback can be rare. Prepare to be self-reflective about your performance after each round.

• Clarify the requirements: If an assignment feels ambiguous, do not hesitate to ask for clarification on the scope. It is better to ask for guidance than to spend hours on an assumption that does not align with their expectations.
• Master the presentation: When presenting your case study, treat your interviewers like stakeholders. Focus on the insights and the "so what," rather than just the technical implementation.
• Prepare for live coding: Practice common data manipulation tasks in a live setting. Being able to talk through your code as you write it is a key skill they look for.
• Research the product: Spend time understanding how Tatari approaches TV measurement. Understanding their core product will help you tailor your answers to their specific business model.

The Data Scientist role at Tatari offers a unique opportunity to apply sophisticated analytical techniques to a high-impact, high-visibility industry. By focusing your preparation on technical fluency, clear communication of complex ideas, and a product-centric approach to problem-solving, you will be well-positioned to navigate the interview process successfully.

Remember that Tatari values candidates who can demonstrate ownership and a proactive attitude toward improving their internal systems. Approach each round as a conversation about how you can contribute to their mission of making TV advertising measurable. We encourage you to use the insights provided here as a foundation for your preparation and to approach your interviews with confidence and clarity.