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Senior Machine Learning Engineer, Of Funnel

Job in Portsmouth, Hampshire County, PO5, England, UK
Listing for: Alien Blue
Full Time position
Listed on 2026-09-18
Job specializations:
  • Software Development
    Machine Learning/ ML Engineer, AI Engineer (Applied/Software)
Job Description & How to Apply Below

Machine Learning Deep Learning Pytorch Data Science Tensorflow

Join Reddit's Top of Funnel team and play a key role in user growth. Leverage your expertise in machine learning and search engines to introduce Reddit to new users and transform them into engaged members of the community. As a core member, you'll use vast amounts of user data to enhance Reddit's ability to attract, engage, and guide new users. You will own projects from ideation to production, collaborating with a talented, cross‑functional team to solve hard problems and create experiences that users will love.

The team values impact, personal growth, openness, and kindness.

Responsibilities
  • Collaborate on projects with other Top of Funnel engineers, applying Machine Learning to solve discovery, relevance, and recommendation problems.
  • Build and deploy sophisticated machine learning models to improve experiences for millions of users.
  • Participate in the full software development cycle: design, develop, QA, deploy, experiment, analyze, and iterate.
  • Collaborate across disciplines and with other ML teams at Reddit to find technical solutions to complex challenges.
  • Be a mentor and cross‑functional advocate for the team.
Qualifications
  • 2+ years of experience with industry‑level deep learning models.
  • 2+ years of experience with mainstream ML frameworks (such as Tensor Flow and PyTorch).
  • 4+ years of end‑to‑end experience of training, evaluating, testing, and deploying industry‑level models.
  • 4+ years of experience of orchestrating complicated data generation pipelines on large‑scale datasets.
  • Successful track record of product ionizing and applying machine learning techniques in addressing real‑world problems end to end.
  • Comfort analyzing high‑volume natural language and multimodal data from varying sources, proficient with SQL.
  • Experience communicating complex research and ideas in a clear, precise, and actionable manner.
  • Experience working with data‑intensive systems and writing production‑quality software (preferred Python or Go).
Nice to have
  • Experience in content recommendations and content personalization.
  • Passionate about building delightful products for users.
Benefits
  • Group Personal Pension Scheme with Employer match.
  • Private Medical and Dental Scheme.
  • Income Replacement Programs.
  • Family Planning Support.
  • Gender‑Affirming Care.
  • Mental Health & Coaching Benefits.
  • Bike to Work scheme.
  • Flexible Vacation & Reddit Global Days Off.
How to Apply

Interested in this position? Please submit your resume and cover letter through the application portal.

Position Requirements
10+ Years work experience
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