Lead design and implementation of search relevance, retrieval, ranking, and ML-driven search features (including LLMs and RAG). Requires 10+ years experience in large-scale search/recommendation systems, proficiency with PyTorch or TensorFlow, production LLM experience, and programming in Python and/or Golang. Remote role for United States-based candidates.

Work on the Feeds Experience team to design, implement, and ship high-traffic feed features across web and apps. Collaborate with product, design, and engineers; own full development cycle, contribute to developer standards, and focus on observability and metrics. Requires 6+ years of front-end development experience (JavaScript/TypeScript, ES6) and experience with frameworks such as React, Vue, Angular, Lit, or Polymer.

Remote (United States) senior role focused on refining and owning Reddit’s data storage and caching infrastructure to support hundreds of millions of users. Requires 5+ years building internet-scale software and experience with distributed storage, languages such as Golang/Python/C++/Java, and storage technologies like Postgres, MySQL, Cassandra, Redis, and Memcached.

Mid-level generalist backend role on Reddit Ads. Responsibilities include designing and implementing advertiser-facing microservices and APIs, building distributed and real-time data systems, improving operational stability, and collaborating with product, platform, and data teams. Requires 3+ years of software development experience in languages such as Java, Scala, Go, C++, or Python.

Mid-level backend engineer role on Reddit Ads teams (e.g., Ads ML Serving, Attribution & Identity, Ads Growth, Business Manager). Work includes building microservices/APIs, distributed and real-time data systems, and infrastructure for ad products using technologies such as Go, Python, Scala, Spark, Kafka, Postgres, BigQuery, Redis, Druid, Kubernetes, Argo, and Docker. Requires 3+ years of software development experience.

Generalist mid-level backend role in Reddit's Ads organization. Responsibilities include designing and implementing ads products and microservices, collaborating with platform and data teams, improving operational stability (code quality, dashboards), and building extensible components. Technologies mentioned: Go, Python, Scala, Spark, Thrift, Baseplate, Kafka, Postgres, BigQuery, Redis, Druid, Kubernetes, Argo, Docker.

Generalist senior backend engineer role on Reddit's Ads organization responsible for building microservices and APIs, distributed and real-time data systems, ad backends and interactive ad experiences. Technologies listed include Go, Python, Scala, Spark, Kafka, Postgres, BigQuery, Redis, Druid, Kubernetes, Argo and Docker. Requires 5+ years of software development experience. US-based remote; base salary range $190,800–$267,100 USD per year.

Reddit is hiring a Senior Machine Learning Engineer to own end-to-end ML systems including model development, scalable data and model pipelines, model serving, and monitoring. The role focuses on recommendations, search/ranking, advertising systems, representation learning and LLM/Gen AI techniques, and requires production ML experience, strong software engineering skills, and familiarity with modern ML frameworks and large-scale data processing tools.