Senior Data Scientist Ii, Relevance & Ranking

Meet Fetch AI & DataAI & Data at Fetch sit at the center of how we understand our business, make decisions, and build intelligent products. The organization operates as an integrated AI & data ecosystem, spanning multiple disciplines, including data engineering, analytics engineering, machine learning, experimentation, and data platforms, all working together to turn data into durable business and customer impact.
Teams operate in complex problem spaces where requirements evolve, tradeoffs are constant, and the right answer is rarely obvious. Success depends on strong technical judgment, comfort with ambiguity, and the ability to gather context and make informed decisions while balancing quality, performance, scalability, and responsible use.
Practitioners across this org contribute hands‑on to production systems, analytical foundations, and intelligent features. You will collaborate closely with product, platform, and engineering partners, help shape standards and best practices, and ensure our AI and data capabilities scale reliably as Fetch grows.
About the Role:You’ll own the analytical and experimentation roadmap for ranking and relevance at Fetch, partnering with Product, Engineering, and ML to improve advertiser outcomes, user value, and Fetch’s long‑term economics.
As the team’s dedicated data scientist, you’ll own the data science strategy for relevance and ranking, working closely with engineers on models that drive user engagement, rewards earned, and partner economic outcomes. You’ll build frameworks that balance advertiser incrementality and delivery, user relevance and retention, and platform revenue, reward costs, and margin.
You’ll be the core data science partner across the go‑to‑market, offer development, and offer delivery teams, translating commercial goals into measurable objectives, product requirements, and ranking improvements. You’ll shape senior stakeholder decisions on launch, iteration, or stopping, and mentor others while establishing reusable methods that improve the team’s scientific quality and execution.
What You’ll Do at Fetch:
Own the data science strategy and roadmap for ranking and relevance as the team’s dedicated data scientist
Partner closely with engineers to improve ranking models end to end, from defining what the model should optimize through experimentation
Own experiment design and turn results into clear launch recommendations
Design measurement that holds up in a marketplace, where bias and interference between advertisers can distort results
Apply rigorous observational methods when experiments aren’t possible, and defend the assumptions behind them
Build marketplace frameworks that balance advertiser, user, and platform value with clear success criteria and guardrails for the trade‑offs
Separate true incremental gains from value that’s simply shifted between advertisers, surfaces, or time periods
Measure how changes impact different user and advertiser segments, distinguishing durable value from short‑term lift
Use findings to shape targeting and investment strategy, accounting for uncertainty
Quantify commercial impact to guide senior leaders on priorities and product decisions
Serve as the core data science partner to commercial and offer teams, turning business goals into measurable objectives and ranking improvements
Communicate with technical and non‑technical partners alike
Mentor others and build reusable methods that raise the team’s scientific quality and execution
Leverage tools and technologies such as Python, SQL, Snowflake, dbt, Airflow, Spark, and AWS to conduct and scale analytical work
Minimum Qualifications:
8+ years of experience in data science, machine learning, or applied analytics, with demonstrated ownership of complex analytical problems in product‑driven environments
Experience owning the analytical roadmap and experiments for ranking, relevance, or recommendations
Ability to explain which questions you prioritized, which work you declined, and why
Cross‑functional collaboration experience where product, sales, and engineering are all factors in your daily work
Experience defining a marketplace KPI framework and resolving advertiser‑user‑platform trade‑offs
Track record of looking beyond a single metric’s improvement to its effect on overall marketplace economics
Experience designing measurement that accounts for selection bias, shared budgets, or spillovers
Ability to defend experiment design and its assumptions, addressing selection bias, interference, or observational identification
Demonstrated incremental, persistent business impact
Track record of influencing strategy or launch decisions
Examples of redirecting, pausing, or stopping initiatives based on quantified trade‑offs
Experience building reusable analytical assets and mentoring other analysts or scientists
Strong modeling expertise
Strong proficiency in SQL and at least one programming language, preferably Python
Experience working with large‑scale data systems such as Snowflake, dbt, Airflow, or Spark
Preferred Qualifications:
Substantial experience with advertiser‑funded consumer marketplaces, retail media, or ad platforms balancing advertiser, user, and platform incentives
Experience in ad ranking or product search and ranking
Consumer product analytics experience connecting behavior to retention and monetization
This is a full‑time role that can be held from one of our US offices or remotely in the United States or any Canadian province (excluding Quebec), subject to appropriate work authorization. Canadian employment, if applicable, would be through Fetch’s Canadian Employer of Record.
Benefits for Canada‑based employees may differ slightly to comply with applicable law(s) (e.G., paid time off, Holidays, etc.).
Fetch may use technology tools that incorporate artificial intelligence ("AI") capabilities to support certain activities within our recruiting and hiring process:
Reviewing and organizing applications and resumes to help our recruiting team manage high volumes of submissions, including automated review of fraud signals to identify bad actors;
Identifying candidates whose stated qualifications and experience appear relevant to an open position;
Scheduling andcoordinating interviews with candidates;
Generating interview summaries or notes to assist recruiters and hiring managers in their review;
and
Conductingresearch on open roles and candidate pools to improve the effectiveness of our recruiting practices.
Fetch does not use AI tools to make hiring decisions. All decisions regarding whether to advance a candidate, extend an offer, or decline an application are made by Fetch employees, who are predominantly members of our Talent Acquisition team and relevant Hiring Managers. AI tools serve only to assist the process of recruiting talent and to inform the human review of candidate information. In no way does Fetch allow AI systems to make, finalize, or override any employment decision.
Compensation:At Fetch, we offer competitive compensation packages including base, equity, and benefits to the exceptional folks we hire. Discover our benefits and how our employees live rewarded at
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