Senior Staff Machine Learning Engineer, Search Platform

October 20

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Reddit, Inc.

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B2C • Media • Social Impact

Reddit, Inc. is a social media platform that acts as a hub for thousands of communities, where users can engage in diverse conversations ranging from breaking news to niche interests. It enables users to post, comment, and vote on content, fostering a vibrant online community. Millions of people globally connect and share their passions on Reddit, creating a dynamic environment for authentic human interaction.

501 - 1000 employees

Founded 2005

👥 B2C

📱 Media

🌍 Social Impact

📋 Description

• Lead the technical strategy, architecture, and implementation of Reddit’s next-generation search engine, integrating lexical, vector retrieval and Gen AI search applications. • Partner closely with product engineers across Search, Feeds, Ads, Growth, and Safety to deliver high-quality, low-latency search and retrieval experiences. • Define best practices for observability, reliability, and operational excellence in large-scale distributed systems. • Mentor and guide engineers in designing scalable search infrastructure and adopting robust DevOps and SRE principles. • Collaborate with infrastructure, and ML teams to ensure the search platform evolves to meet the needs of Reddit’s growing user base and diverse content ecosystem.

🎯 Requirements

• 10+ years of experience in software engineering, specializing in cloud-native search and retrieval systems. • 3+ years in technical leadership, architecting and scaling distributed systems in production environments. • Deep expertise in lexical and vector retrieval technologies, such as Milvus, Vespa, and Elasticsearch, with strong knowledge of Lucene and Tantivy internals. • Skilled in designing cloud-native architectures and managing containerized workloads using Kubernetes and AWS/GCP. • Proven track record in building real-time data pipelines, indexing frameworks, and hybrid (lexical + vector) search architectures. • Adept at translating complex technical challenges into clear, actionable strategies. • Strong communicator and mentor who leads through collaboration, influence, and technical excellence.

🏖️ 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