Senior Machine Learning Systems Engineer, ML Platform

Reddit is a community of communities. It's built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet.

As a Senior Software Engineer, ML Platform, you will work on our ML Data Team and be instrumental in architecting, implementing, and maintaining foundational ML infrastructure powering Feeds Ranking, Content Understanding, Recommendations, Ads, and much more to fulfill Reddit's mission of bringing community and belonging to everyone in the world.

Responsibilities:

• Lead the design, development, testing, and operation of ML signal-governance capabilities that help MLEs discover signals and understand their ownership, lineage, quality, and usage.
• Build tools that help teams assess signal importance and make informed lifecycle decisions.
• Partner with MLEs and cross-functional teams to define governance workflows and deliver reliable, intuitive ways to explore and act on signal metadata.
• Contribute across the ML Data Platform, including prediction logging and training data platforms, to design, develop, test, and operate batch and streaming pipelines processing petabyte-scale data.
• Drive complex projects end to end from technical planning and design through implementation, testing, rollout, and ongoing operation.

Requirements:

• 5+ years of experience in the ML Platform domain.
• Strong customer focus and experience driving projects from requirements to production in close collaboration with multiple cross-functional partners (XFN).
• Experience with large-scale batch and streaming data processing.
• Experience building production-quality systems with testing, monitoring, observability, and reliability practices.
• Deep understanding of distributed systems and data-intensive architectures, with strong communication and collaboration skills.

Benefits:

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
• Family Planning Support
• Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Paid Volunteer Time Off
• Generous Paid Parental Leave