# Senior Machine Learning Engineer, Ads ML Efficiency at Reddit

- Company: Reddit
- What the company does: Backed by 500 Global.
- Company website: https://www.redditinc.com
- Type: Startups (AI role)
- Level: Senior
- Location: Remote - United States
- Work setup: Remote
- Posted: 2026-10-20
- Apply by: 2026-12-04
- Apply: https://job-boards.greenhouse.io/reddit/jobs/8304463?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/reddit-senior-machine-learning-engineer-ads-ml-efficiency/

## About the role

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com . Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Hands-on ML performance engineering experience: Demonstrated ability to diagnose and implement meaningful performance improvements in production or production-relevant ML workloads
- Deep expertise in at least one ML performance area, such as inference execution, ML runtimes, compiler integration, GPU/kernel optimization, memory systems, or training execution
- Strong profiling and benchmarking skills: Ability to identify bottlenecks systematically, establish reliable baselines, and validate measurable end-to-end improvements
- Strong software engineering fundamentals: Experience implementing, debugging, testing, and maintaining performance-sensitive systems, with proficiency in Python and relevant systems programming technologies
- ML systems understanding: Familiarity with production ML frameworks and the performance trade-offs across model execution, runtime, memory, hardware, and infrastructure
- Production engineering judgment: Ability to balance performance improvements with numerical correctness, model quality, reliability, maintainability, and safe rollout

Tags: Ads Product & Engineering

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/reddit-senior-machine-learning-engineer-ads-ml-efficiency/