Staff ML Platform Engineer: Embeddings & Inference

Reddit, Inc.; San Francisco (CA); On-site; USD 253,000 - 355,000; Full time

Benefits offered by this job

Healthcare

401k

Benefits programs

Family planning

Gender-affirming care

Mental health

Flexible vacation

Parental leave

Job summary

Reddit, Inc. is seeking a Staff Machine Learning Infrastructure Engineer to own the technical direction for large-scale ML platforms, guiding development of advanced DL architectures and scalable ML systems.

You will partner with leadership to define ML roadmaps, drive innovation, and ensure efficient deployment of models in production while mentoring the team. You will lead cross-functional efforts with Feed Ranking, Ads, Content Understanding, and Core ML to integrate ML models, optimize

Qualifications

• 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.
• Strong software engineering skills in Python, C++, or similar languages, with experience in ML infrastructure, high-performance computing, and cloud-based ML pipelines.

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

Large-scale ML systems

Deep learning architectures

Python

C++

ML infrastructure

Leadership

AB testing

Communication

Tools

Distributed training

Job description

Reddit, Inc. is seeking a Staff Machine Learning Infrastructure Engineer to own the technical direction for large-scale ML platforms, guiding development of advanced DL architectures and scalable ML systems.

You will partner with leadership to define ML roadmaps, drive innovation, and ensure efficient deployment of models in production while mentoring the team. You will lead cross-functional efforts with Feed Ranking, Ads, Content Understanding, and Core ML to integrate ML models, optimize