[Remote] Senior Staff Machine Learning Systems Engineer, Indexing & Retrieval Search

Note: The job is a remote job and is open to candidates in USA. Reddit, Inc. is a community-driven platform known for its diverse conversations and vast user engagement. They are seeking a Senior Staff Machine Learning Systems Engineer to lead the development of ML Indexing & Retrieval systems, focusing on building scalable and reliable platforms that enhance machine learning capabilities.ResponsibilitiesLead the technical strategy, architecture, and implementation of Reddit’s next-generation ML Indexing & Retrieval engine, integrating capabilities across lexical and vector indexing, low-latency retrieval, and emerging GenAI applicationsPartner closely with product engineers across Content Understanding, Search, Feeds, Ads, Growth, and Safety to deliver high-quality experiencesDefine best practices for observability, reliability, and operational excellence in large-scale distributed systemsMentor and guide engineers in designing scalable infrastructure and adopting robust DevOps and SRE principlesCollaborate with infrastructure, and ML teams to ensure the platform evolves to meet the needs of Reddit’s growing user base and diverse content ecosystemSkills10+ years of experience in software engineering, specializing in Indexing and Retrieval systems3+ years in technical leadership, architecting and scaling distributed systems in production environmentsDeep expertise in large-scale data platforms, including batch indexing and stream processingProven experience designing and operating large-scale, low-latency retrieval servicesExpertise in lexical and vector search retrieval technologies, such as Milvus, Vespa, or ElasticsearchSkilled in designing cloud-native architectures and managing containerized workloads using Kubernetes and AWS/GCPAdept at translating complex technical challenges into clear, actionable strategiesStrong communicator and mentor who leads through collaboration, influence, and technical excellenceBenefitsComprehensive Healthcare Benefits and Income Replacement Programs401k with Employer MatchGlobal Benefit programs that fit your lifestyle, from workspace to professional development to caregiving supportFamily Planning SupportGender-Affirming CareMental Health & Coaching BenefitsFlexible Vacation & Paid Volunteer Time OffGenerous Paid Parental LeaveEquity in the form of restricted stock unitsCommission (depending on the position offered)Medical, dental, and vision insurance401(k) program with employer matchGenerous time off for vacationParental leaveCompany OverviewReddit is the heart of the internet, where millions of people get together to talk about any topic imaginable. It was founded in 2005, and is headquartered in San Francisco, California, USA, with a workforce of 1001-5000 employees. Its website is https://www.redditinc.com.Company H1B SponsorshipReddit, Inc. has a track record of offering H1B sponsorships, with 22 in 2026, 99 in 2025, 63 in 2024, 76 in 2023, 70 in 2022, 68 in 2021, 39 in 2020. Please note that this does not guarantee sponsorship for this specific role.