Senior Data Scientist (Sota Team)

CyprusCzechiaSpainGermanyPolandSerbiaHybrid

About the role

  • Build and improve LLM- and NLP-based systems used in AI Search optimization products

  • Design evaluation frameworks and benchmarks for LLM outputs, prompts, and model behavior

  • Work on brand extraction, domain mapping, entity extraction, and related algorithmic tasks

  • Optimize LLM pipelines for quality, cost, throughput, and reliability

  • Write clean, production-quality Python code

  • Collaborate with Product, Engineering, and other Data Scientists to turn product problems into working technical solutions

Examples of our projects:

  • Brand Extraction and Domain Mapping – extracting brand names, mapping corresponding domains, and other relevant entities from LLM-generated responses

  • LLM quality evaluation and optimization – building benchmarks to evaluate prompt and model quality, while improving throughput, latency, and cost

  • Algorithm development – designing and improving algorithms for product aliases, brand hierarchies, and other domain-specific problems

About you

Move together. Raise the bar. Learn fast—grow faster. That’s the default. And here’s what else is needed to succeed in this role: 

Hard Skills:

  • 5+ years of experience as a Data Scientist, Machine Learning Engineer, or in a similar role

  • Strong knowledge of machine learning, statistics, and classical NLP techniques

  • Strong Python and SQL skills

  • Practical experience working with LLMs or LLM-based systems

  • Understanding of how to evaluate model quality using datasets, benchmarks, or experiments

  • Ability to write clean, maintainable, and reliable code

  • Ownership mindset and ability to work with ambiguous product problems

Soft Skills:

  • You care about delivering working solutions, not just experiments

  • You balance execution speed with code quality, reliability, and maintainability

  • You communicate clearly and collaborate well across Data Science, Product, and Engineering

Not required, but a plus

  • Experience with RAG, AI agents, or agent-based systems

  • Experience deploying ML or LLM-based solutions in production

  • Experience with GCP, Vertex AI, or GitLab CI

  • Experience with asynchronous Python, high-throughput API calls, or large-scale data processing

  • Experience with monitoring, experiment tracking, or reproducible research practices

About the team

We are a Data Science team focused on LLM- and NLP-powered products for AI Search optimization. We work on AIO, AI Summarization, Brand Extraction and Domain Mapping, building AI-driven solutions for SEO analysis, entity extraction, and domain understanding.
 

Our stack:

  • Python

  • Google Cloud Platform

  • ClickHouse, PostgreSQL

  • ClearML, Docker, LangFuse, DVC

  • LLM APIs: OpenAI, Google, Anthropic, Perplexity

About the perks

  • Unlimited PTO

  • Hobby & team building budget allowance

  • Employee Support Program

  • Loss of family member financial aid

  • Employee Resource Groups

Published on: 6/28/2026

Semrush

Semrush

Semrush is a leading AI-powered digital marketing SaaS platform used by 10,000,000 digital marketers worldwide.

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