Senior Staff Machine Learning Engineer, Ads Ranking
Reddit · Remote - United States
About this role
**Senior Staff Machine Learning Engineer, Ads Ranking** ## About the Role Reddit is seeking a **Senior Staff Machine Learning Engineer** to define and accelerate how we leverage **agentic AI** to transform **machine learning models and modeling workflows**. This role focuses on **modeling leverage**—improving **model quality and velocity**—rather than building general infrastructure. As a senior staff engineer, you’ll lead across the **entire modeling loop**, using modern AI-assisted development systems (e.g., **Claude, Cursor**, and similar tools) to make model development faster, more rigorous, and more effective across the organization. ## Why Join Us? A domain-flexible platform to redefine how ML engineering is done. If you’re excited to combine strong ML fundamentals with the forefront of **agentic AI** to multiply team impact, we’d love to talk. ## What you’ll do - Develop advanced ML models and **agentic workflows** to help teams design, train, evaluate, and improve them. - Use tools such as **Claude, Cursor**, and comparable AI-assisted development systems to investigate model behavior, generate/test hypotheses, automate repetitive analysis, and improve code and experiments. - Build reliable loops for **data/label analysis**, **feature & embedding development**, **architecture comparison**, **hyperparameter optimization**, **error analysis**, and **experiment readouts**. - Design **evaluation harnesses** that measure both model outcomes and agent/workflow quality (correctness, reproducibility, regressions, cost, latency). - Partner with **product, data science, ML infrastructure, and engineering** teams to connect modeling improvements to user and business outcomes. - Set technical direction across teams, mentor engineers, and raise the bar for **modeling rigor** and **AI-assisted engineering**. ## Required Qualifications - **9+ years** of experience in ML engineering, applied ML, or related field, with substantial production impact. - Senior Staff-level technical leadership and a record of influencing direction across teams. - Deep modeling expertise and strong fundamentals in data, objectives, architectures, optimization, evaluation, and experimentation. - Concrete examples of using **agentic AI** or **AI coding tools** to produce better ML outcomes (not just faster code generation). - Ability to design **guardrails** and evaluations that make autonomous/semi-autonomous workflows trustworthy. - Strong coding ability in **Python** and fluency with modern ML frameworks and data tooling. - Clear, concise communication and a collaborative, low-ego approach to technical leadership. ## Perks and Benefits - **100% remote** opportunity (with office locations for hybrid/onsite preference in **NY, SF, LA, and Chicago**) - Competitive salary and **equity options** - Comprehensive health benefits (medical, dental, vision) + workplace perks (e.g., home office setup stipend) - Generous **401(k)** matching - Flexible vacation policy - **Paid parental leave** (4+ months) - Family planning support - Paid volunteer time off ## Pay Transparency - Base salary range: **$292,500 — $409,500 USD** ## Note on Interview Recording In select roles/locations, interviews may be recorded, transcribed, and summarized by AI. You can opt out prior to scheduled interviews. ## Equal Opportunity Reddit is an equal opportunity employer committed to building a workforce representative of diverse communities. Reasonable accommodations are available for quali
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