[Remote] Staff Machine Learning Systems Engineer, Embeddings Platform

Note: The job is a remote job and is open to candidates in USA. Reddit is a community of communities, known for its open and authentic conversations. The Staff Machine Learning Engineer will lead the technical direction for large-scale machine learning models, driving innovation and ensuring reliable deployment of ML systems while mentoring the team.ResponsibilitiesArchitect and lead the development of next-generation, large-scale machine learning techniquesDefine and execute the ML strategy, identifying opportunities to enhance personalization and recommendation quality across RedditLead research initiatives on scalable machine learning systems and real-time model adaptation, bringing cutting-edge advancements into productionPartner with ML infrastructure teams to build high-performance, distributed training systems that efficiently scale across multiple GPUs and cloud environmentsEstablish and optimize real-time serving architectures for large-scale embeddings, ensuring low-latency inference and high throughputCollaborate cross-functionally with teams in Feed Ranking, Ads, Content Understanding, and Core ML to integrate ML models into Reddit’s key AI-driven systemsMentor and guide senior and mid-level ML engineers, fostering a culture of excellence, innovation, and knowledge sharingStay at the forefront of AI research, evaluating and introducing new modeling paradigms to keep Reddit’s ML ecosystem cutting-edgeDrive technical discussions, present findings to leadership, and contribute to long-term ML planning and decision-makingSkills8+ years of experience in machine learning engineering, with a strong focus on large-scale ML systems and recommendation or personalization systemsExpertise in modern deep learning architectures, including sequence models and foundational modelsDeep understanding of complex multi-entity relationships in machine learning applications and how they are modeled in large-scale systemsProven ability to design, implement, and optimize scalable ML architectures, from distributed training to real-time inferenceStrong software engineering skills in Python, C++, or similar languages, with experience in ML infrastructure, high-performance computing, and cloud-based ML pipelinesDemonstrated leadership in driving ML strategy, mentoring engineers, and influencing cross-functional teamsExperience with A/B testing, model evaluation frameworks, and real-time feedback loops in large-scale production systemsExcellent communication skills, with the ability to effectively present complex ML concepts to technical and non-technical stakeholdersBenefitsComprehensive 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 unitsMay also be eligible to receive a commissionMedical, dental, and vision insurance401(k) program with employer matchGenerous time off for vacation, and parental 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.