Sr. Software Engineer, Machine Learning, tvScientific (San Francisco)

About Pinterest:Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product.Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work. Creating a career you love? It’s Possible.At Pinterest, AI isn't just a feature, it's a powerful partner that augments our creativity and amplifies our impact, and we’re looking for candidates who are excited to be a part of that. To get a complete picture of your experience and abilities, we’ll explore your foundational skills and how you collaborate with AI.Through our interview process, what matters most is that you can always explain your approach, showing us not just what you know, but how you think. You can read more about our AI interview philosophy and how we use AI in our recruiting process here.About tvScientifictvScientific is the first and only CTV advertising platform purpose-built for performance marketers. We leverage massive data and cutting-edge science to automate and optimize TV advertising to drive business outcomes. Our solution combines media buying, optimization, measurement, and attribution in one, efficient platform. Our platform is built by industry leaders with a long history in programmatic advertising, digital media, and ad verification who have now purpose-built a CTV performance platform advertisers can trust to grow their business.As a Sr. Machine Learning Engineer at tvScientific, you'll build the ML and AI systems behind our Connected TV ad-buying platform: real-time bidding, campaign optimization, and incrementality measurement at scale. We're an adtech company solving a hard problem: making CTV advertising actually measurable. Our platform helps advertisers buy ads across the CTV ecosystem: Hulu, Pluto TV, Disney+, HBO Max, and hundreds of FAST channels: and prove that those ads drove real business outcomes.What you'll do:Write production Python that powers real-time bidding, model training, and campaign optimizationTrain, deploy, and monitor ML models that decide which ads to show, when, and at what price: millions of bid decisions per secondBuild and improve our incrementality measurement systems: helping advertisers understand the true causal lift of their CTV spendDesign and implement new ML products across the ad-buying lifecycle: audience targeting, bid optimization, pacing, and attributionUse LLMs and generative AI to build internal tools that accelerate how we develop, test, and ship ML systemsServe as a technical lead and mentor on a distributed engineering teamWhat we're looking for:Strong production Python skills: you write code that runs in prod, not just notebooksSolid statistics and ML fundamentals: you can reason about experiment design, model evaluation, and when simpler approaches beat complex onesFamiliarity with modern AI tools and good judgment about where they add valueAdtech or CTV experience: familiarity with RTB, programmatic advertising, supply-path optimizationClear written communication: we're a distributed team and writing is how decisions get madeComfort with ambiguity: you'll own problems end-to-end in a fast-moving environment, from scoping to shippingBachelor's degree in Computer Science, Mathematics, Engineering, related field, or equivalent experience4+ years of industry experienceNice-to-Haves:Experience using Cursor, Copilot, Codex, or similar AI coding assistants for development, debugging, testing, and refactoringFamiliarity with LLM-powered productivity tools for documentation search, experiment analysis, SQL/data exploration, and engineering workflow accelerationCausal inference: uplift modeling, synthetic controls, difference-in-differences, or incrementality testingBig data experience with Scala and SparkSystems programming experience in Zig or similar (C, C++, Rust)Reinforcement learning or bandit algorithms in productionExperience building agentic AI systems or LLM-powered workflowsMLOps experience: model deployment, monitoring, and pipeline orchestration on AWSIn-Office Requirement Statement:We recognize that the ideal environment for work is situational and may differ across departments. What this looks like day-to-day can vary based on the needs of each organization or role.Relocation Statement:This position is not eligible for relocation assistance. Visit our PinFlex page to learn more about our working model.#LI-SM4#LI-REMOTEAt Pinterest we believe the workplace should be equitable, inclusive, and inspiring for every employee. In an effort to provide greater transparency, we are sharing the base salary range for this position. The position is also eligible for equity. Final salary is based on a number of factors including location, travel, relevant prior experience, or particular skills and expertise.Information regarding the culture at Pinterest and benefits available for this position can be found here.US based applicants only$155,584—$320,320 USDOur Commitment to Inclusion:Pinterest is an equal opportunity employer and makes employment decisions on the basis of merit. We want to have the best qualified people in every job. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, national origin, religion or religious creed, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, age, marital status, status as a protected veteran, physical or mental disability, medical condition, genetic information or characteristics (or those of a family member) or any other consideration made unlawful by applicable federal, state or local laws. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you require a medical or religious accommodation during the job application process, please complete this form for support.By submitting this application, I certify that all information submitted in my application and throughout the hiring process is true, accurate, and complete to the best of my knowledge. I understand that any false statement, omission, or misrepresentation may disqualify me from employment consideration or result in termination if discovered after hire.