Senior Data Scientist II, Relevance & Ranking

Fetch; Canada; Remote; CAD 198,000 - 269,000; Full time

Job summary

Fetch is seeking a senior data scientist to own the data science strategy for ranking and relevance. You will partner with product, engineering, and ML teams to drive advertiser outcomes, user value, and long-term economics, building scalable frameworks and reusable methods for consistent scientific quality.

You will design experiments, measure impact across advertiser and user segments, mentor analysts, and guide senior stakeholders on prioritization and product decisions.

Qualifications

• 8+ years in data science, ML, or analytics in product-driven env.
• Own analytical roadmap for ranking/relevance or recommendations.
• Explain prioritization and trade-offs behind decisions.
• Cross-functional collaboration with product, sales, and engineering.
• Define marketplace KPI framework and its impact on economics.
• Demonstrated business impact beyond single metrics.

Responsibilities

• Own the data science strategy for ranking and relevance.
• Collaborate with engineers to improve models end-to-end.
• Design experiments and translate results into launch recommendations.
• Build observational methods and guardrails for bias and interference.
• Mentor teammates and develop reusable analytical assets.
• Communicate insights to technical and non-technical partners.

Skills

Data science

Python

SQL

Experiment design

Modeling

Communication

Mentoring

Tools

Snowflake

dbt

Airflow

Spark

AWS

Job description

Meet Fetch AI & Data

AI & 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 and coordinating interviews with candidates;
• Generating interview summaries or notes to assist recruiters and hiring managers in their review; and
• Conducting research 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 https://fetch.com/careers.