Lead Data Scientist

Ahrefs is looking for an experienced Lead Data Scientist who is proficient in working with large amounts of data to extract all kinds of insights and regularities from it. We're also building our own models of calculating the ‘power’ of a web page and its likelihood of ranking high in search results.

What We Need

• Good knowledge in a wide variety of advanced data analysis and machine learning techniques and experience in developing solutions in response to real-world business problems
• Proficient with programming languages such as Python and R
• Experience in scaling Machine Learning models related to Information Retrieval (Web Search in production is a huge plus)
• Experience in full stack data science is preferred
• Knowledgeable in Language Modelling, and experience with open source NLP library such as NLTK, Gensim, Spacy, Pytorch, etc.
• Experience with mainstream big data platforms such as Spark and Hadoop
• Experience in Tensorflow, Theano, or other deep learning frameworks preferred
• Experience with Elasticsearch or similar DB, and ability to conduct independent research utilising large unstructured data sets
• Knowledge on visualisation using open source tools

What You'll Do

• Research, prototype, build and maintain systems for information retrieval, search, document classification, and Q&A
• Create comprehensive product requirements together with Product Development, Design and Marketing teams
• Work closely with the Engineering teams (frontend and backend) to implement, deploy, and maintain production systems
• Write thorough documentation
• Effectively communicate highly technical results to various teams
• Lead and manage the existing Data Science team
• Lead and manage the hiring of Data Science team members including interns

Basic Requirements

• Preferably at least a Master’s degree in any quantitative discipline: Applied Mathematics, Computer Science, Statistics, etc.
• Experience with search, information retrieval, and natural language processing is a must
• Experience with streaming algorithms and applications
• Experience in Python, SQL (clickhouse dialect is a plus), Git, CI/CD
• Experience with (at least one) deep learning framework: TensorFlow, Pytorch, Theano
• Experience with big data platforms such as Spark and Hadoop
• Experience with lucene-based search engines: Solr and/or Elasticsearch
• Strong interpersonal and communication skills
• Familiarity with functional languages such as OCaml or Haskell is a big plus