Senior Machine Learning Engineer, Dev Platform Data and Discovery

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 101M+ daily active unique visitors, Reddit is one of the internet’s largest sources of information.

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The Developer Platform team empowers developers to create engaging interactive experiences for Reddit communities, such as asynchronous or real-time multiplayer games, live stock tickers, and live scoreboards. If you have a background in ranking and are excited about connecting Redditors with their next favorite game, this highly collaborative and impactful team wants your expertise!

You will own projects from ideation to production instead of being stuck making small incremental gains on enterprise systems. You’ll work with a super talented, cross‑functional team to solve hard problems in order to create experiences that users will love. We are a team of builders that value impact, personal growth, openness and kindness.

• Lead projects from concept, design, implementation, to rollout, ensuring the highest quality and performance.
• Identify opportunities to enhance ranking capabilities by diving deep into our platform and understanding the needs of our customers.
• Design and develop applied machine learning models for modeled personalization, game taxonomy, and more, from ideation to production deployment.
• Collaborate with data scientists, product managers and backend software engineers.
• Mentor junior team members, share knowledge, and contribute to the technical growth of the team. Provide guidance on machine learning best practices and methodologies.
• Conduct A/B tests and experiments to iterate and fine‑tune algorithms and models.
• Stay updated on state‑of‑the‑art algorithmic techniques and recognize promising innovations, adapting them to Reddit’s unique platform and community.
• Design, implement, and maintain reliable, high‑performance distributed systems.

• 5+ years of experience in a relevant industry or academic background, preferably in a quantitative/modeling or highly scalable computing environment.
• Prior experience with personalized feed ranking.
• Proven track record of delivering complex machine learning projects from conception to deployment, preferably in real‑world applications.
• Ability to lead and mentor machine learning engineers or data scientists.
• Strong communication skills to collaborate effectively with cross‑functional teams and stakeholders.
• Demonstrated ability to innovate and stay updated with the latest advancements in machine learning and AI.

• Experience of orchestrating complicated data pipelines and system engineering on large‑scale dataset
• Proficiency with programming languages and statistical analysis
• Prior experience with Sequence Modeling, Reinforcement Learning, or Transformer Architecture is a big plus
• Experience in Bayesian methodology and experimentation is a plus

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k Match
• Family Planning Support
• Gender‑Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Reddit Global Days off
• Generous paid Parental Leave
• Paid Volunteer time off

This job posting may span more than one career level.

In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to U.S.

-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, and parental leave. To learn more, please visit

To provide greater transparency to candidates, we share base pay ranges for all U.S.

-based job postings regardless of state. We set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage growth companies. Final offer amounts are…