Principal Software Engineer, ML Feature Platform

Reddit

285d • $266,000 - $387,400

About The Position

Reddit is a community of communities, built on shared interests, passion, and trust. The Machine Learning Platform team at Reddit is a high-impact team that owns the infrastructure powering recommendations, content discovery, and user and content quantification. As a Senior Staff Software Engineer, ML Feature Platform, you will oversee the vision and lead the charge of our ML Feature Platform Team, architecting, implementing, and maintaining foundational ML infrastructure used to compute, store, and retrieve features for various applications including Feeds Ranking, Content Understanding, and Ads. You will lead the design and development of a cutting-edge feature store optimized for low-latency online inference at scale.

Requirements

• 10+ years of professional software engineering experience.
• 3+ years leading a team to design large-scale distributed systems.
• Deep expertise in systems design, performance optimization, and cloud-native architectures (AWS, GCP, or Azure).
• Strong understanding of ML infrastructure, especially feature engineering, data freshness, feature versioning, online/offline feature retrieval, and online/offline consistency.
• Proven experience building real-time data systems, e.g., feature stores, stream processing engines, or caching systems.
• Strong organizational and communication skills.

Responsibilities

• Lead the technical strategy, architecture, and development of Reddit’s next-generation, real-time feature store that supports both online and offline feature retrieval.
• Work with other engineers across ML Platform and Reddit infrastructure to significantly advance the ML Platform.
• Collaborate with management on team goal setting, planning, and de-risking project execution.
• Mentor team members in adopting a rigorous DevOps approach to maintain and improve ML infrastructure components and services health and quality.

Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k Match
• Family Planning Support
• Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Reddit Global Days off
• Generous paid Parental Leave
• Paid Volunteer time off

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 1,001-5,000 employees