Principal Software Engineer

Summary

Join Reddit's Machine Learning Platform team as a Principal Software Engineer and lead the development of our next-generation, real-time feature store. You will oversee the vision and implementation of foundational ML infrastructure used for features powering Feeds Ranking, Content Understanding, Recommendations, and Ads. This role involves leading the technical strategy and architecture, collaborating with engineers across the platform, and mentoring team members. The position requires 10+ years of software engineering experience and 3+ years leading teams in large-scale distributed systems. It's a completely remote-friendly role with benefits including comprehensive healthcare, 401k match, generous parental leave, and flexible vacation.

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 to serve 100s of millions of users
• Proven experience building real-time data systems, e.g., feature stores, stream processing engines, or caching systems
• Strong organizational & 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
• Work with management on team goal setting, planning, and de-risk project execution
• Mentor other team members in adopting a rigorous DevOps approach to maintain and/or improve ML infra 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