Machine Learning Engineer, Reddit
Answers Relevance
$216.7-322k
Online platform for thoughts, experiences & discussions
Be an early applicant
Online platform for thoughts, experiences & discussions
1001+ employees
Be an early applicant
$216.7-322k
1001+ employees
Company mission
To empower communities, and make their knowledge accessible to all.
Role
Who you are
- You don’t need experience in every area listed below. A background in a few may make you a great fit!
- Recommendations, search, content understanding, or large-scale data and ML infrastructure
- SOTA large scale RecSys
- Foundational retriever models
- RAG systems, retrieval methods, LLM evaluation, or production LLM features
- Agentic AI, such as tool calls, MCPs, multi-agent systems, or orchestration
- Self-hosted open-weight models such as Qwen or Llama; prompt engineering, fine-tuning, post-training, or prompt optimization
- Improving grounding, instruction following, and hallucination; evaluating retrieval and generation quality
- Scaling LLM systems, including latency, caching, and cost; safety measures for prompt injection and unsafe inputs
- Defining product success metrics, feedback loops, and evaluation approaches, including human review
- 4–12 years of experience building, deploying, and operating ML systems in production
- Broad knowledge of ML fundamentals and experience applying them in production; expert-level modeling depth isn’t required
- Experience developing and productionizing models with TensorFlow, PyTorch, or Hugging Face Transformers
- Experience writing production-quality code, including testing, evaluation, and monitoring; Python experience required, Golang experience a plus
- Experience with ML systems such as data pipelines, feature engineering, model training and serving, and production monitoring
- Strong communication and collaboration skills, and a record of delivering measurable product impact
What the job involves
- We’re hiring Senior and Staff Machine Learning Engineers to make Answers smarter, more relevant, and more helpful
- Our SOTA AI systems helps surface the right conversations, but the heart of Answers is still people helping people ~ Redditors sharing what they know with each other!
- You’ll lead ML projects from idea to production, partnering with Product, Data Science, and Engineering across recommendations, search, messaging, and AI systems
- Build and improve large-scale ML systems, including retrieval and ranking, embeddings, and LLM-powered features
- Set technical direction and deliver measurable user and business impact
- Work with partner teams to shape product and technical roadmaps
- Evaluate new AI/ML approaches and support responsible LLM development
- Mentor engineers and contribute to long-term ML planning
Our take
Reddits is an online platform that hosts thousands of message board communities (known as subreddits) designed to foster authentic human connection. With more than 130,000 communities covering everything from food, entertainment and sports, to niche interests for highly specific audiences, there's virtually a space for everyone.
The platform attracts over 120 million daily users and billions of monthly page views. While these figures are smaller than those of social media giants like Facebook and X, Reddit stands out by offering easily discoverable communities where users can dive deep into virtually any topic imaginable.
Today, Reddit continues to grow its user base and expand its reach, remaining a unique hub for conversation, connection and shared interests. With its strong community-driven model and steady revenue streams, it's most definitely positioned to stay a central part of online culture for years to come.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
57% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Aug 2021
$410m
SERIES F
Feb 2021
$250m
SERIES E
Total funding: $1.2bn
Company benefits
- Comprehensive health benefits
- Flexible vacation & Reddit global days off
- Family planning funds & 4+ months paid parental leave
- Personal & professional development funds
- Paid volunteer time off
- Workspace & home office benefits
Company HQ
SoMa, San Francisco, CA
Leadership
Steve Huffman
(CEO & Founder)After co-founding Reddit in 2005, they stepped away from the company to co-found Hipmunk, where they were the CTO for 5 years. They returned to Reddit in 2015, and have been the CEO since.
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