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.
Responsibilities
- Architect and lead the development of next-generation, large-scale machine learning techniques
- Define and execute the ML strategy, identifying opportunities to enhance personalization and recommendation quality across Reddit
- Lead research initiatives on scalable machine learning systems and real-time model adaptation, bringing cutting-edge advancements into production
- Partner with ML infrastructure teams to build high-performance, distributed training systems that efficiently scale across multiple GPUs and cloud environments
- Establish and optimize real-time serving architectures for large-scale embeddings, ensuring low-latency inference and high throughput
- Collaborate cross-functionally with teams in Feed Ranking, Ads, Content Understanding, and Core ML to integrate ML models into Reddit’s key AI-driven systems
- Mentor and guide senior and mid-level ML engineers, fostering a culture of excellence, innovation, and knowledge sharing
- Stay at the forefront of AI research, evaluating and introducing new modeling paradigms to keep Reddit’s ML ecosystem cutting-edge
- Drive technical discussions, present findings to leadership, and contribute to long-term ML planning and decision-making
Skills
- 8+ years of experience in machine learning engineering, with a strong focus on large-scale ML systems and recommendation or personalization systems
- Expertise in modern deep learning architectures, including sequence models and foundational models
- Deep understanding of complex multi-entity relationships in machine learning applications and how they are modeled in large-scale systems
- Proven ability to design, implement, and optimize scalable ML architectures, from distributed training to real-time inference
- Strong software engineering skills in Python, C++, or similar languages, with experience in ML infrastructure, high-performance computing, and cloud-based ML pipelines
- Demonstrated leadership in driving ML strategy, mentoring engineers, and influencing cross-functional teams
- Experience with A/B testing, model evaluation frameworks, and real-time feedback loops in large-scale production systems
- Excellent communication skills, with the ability to effectively present complex ML concepts to technical and non-technical stakeholders
Benefits
- Comprehensive Healthcare Benefits and Income Replacement Programs
- 401k with Employer Match
- Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
- Family Planning Support
- Gender-Affirming Care
- Mental Health & Coaching Benefits
- Flexible Vacation & Paid Volunteer Time Off
- Generous Paid Parental Leave
- Equity in the form of restricted stock units
- May also be eligible to receive a commission
- Medical, dental, and vision insurance
- 401(k) program with employer match
- Generous time off for vacation, and parental leave
Company Overview
Reddit 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 Sponsorship
Reddit, 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.