Senior Data Scientist — LLMs & ML Ops (Stockholm)

H & M Hennes & Mauritz Sverige AB

Stockholms kommun

On-site

SEK 900,000 - 1,200,000

Full time

14 days+
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Benefits offered by this job

25% staff discount
HIP - Incentive Program
30 days holiday
Pension and life insurance
Wellness benefit 4000kr/year
Benify Benefits Portal
Community activities

Job summary

H & M Hennes & Mauritz Sverige AB in Stockholm seeks a Senior Data Scientist to solve complex business problems using data and ML. You will own end-to-end DS initiatives, build and deploy models, and collaborate with product, engineering, analytics, and business teams.

You will design and operate LLM-based tools, monitor performance, and translate business needs into analytical approaches for measurable impact.

Qualifications

  • Bachelor's or Master's degree in Statistics, Engineering, Computer Science, or a related field.
  • Strong theoretical and practical knowledge of statistics and ML.
  • Proven experience deploying ML models in cloud environments beyond notebook-based work.
  • Hands-on experience building and deploying LLM-based applications, including fine-tuning, retrieval pipelines, and prompt engineering.
  • Strong proficiency in Python and ML frameworks such as PyTorch, TensorFlow, LangChain, or similar libraries.
  • Practical experience with MLOps practices, CI/CD pipelines, and model monitoring, ideally in a cloud environment.
  • Strong SQL skills for data manipulation and analysis.
  • Familiar with DBT or similar data transformation tools.
  • Experienced with vector databases and embedding models.
  • Excellent communicators and confident taking ownership and accountability.
  • Comfortable working in ambiguity while being proactive.

Responsibilities

  • Own and contribute to data science initiatives end to end, from understanding problem statements and exploring data to building, deploying, and maintaining models in production.
  • Design, deploy, and operate LLM-powered tools and workflows in production, with responsibility for evaluation, monitoring, and continuous improvement.
  • Apply statistical methods, machine learning, and advanced analytics to support product and business decisions.
  • Develop, test, and improve models and data-driven solutions with a strong focus on quality, scalability, and long-term maintainability.
  • Take responsibility for solutions after deployment, including monitoring, troubleshooting, and iterative improvements.
  • Perform exploratory and ad hoc data analysis, and present insights in a clear and structured way.
  • Communicate closely with stakeholders to translate business needs into analytical approaches and explain outcomes in an accessible manner.
  • Contribute to technical standards, best practices, and knowledge sharing within the data science community.

Skills

Python
Communication
Ownership
Ambiguity tolerance
Cloud deployment

Education

Bachelor's or Master's in Statistics, Engineering, Computer Science or related field

Tools

PyTorch
TensorFlow
LangChain
DBT
Vector databases

Job description

H & M Hennes & Mauritz Sverige AB in Stockholm seeks a Senior Data Scientist to solve complex business problems using data and ML. You will own end-to-end DS initiatives, build and deploy models, and collaborate with product, engineering, analytics, and business teams.

You will design and operate LLM-based tools, monitor performance, and translate business needs into analytical approaches for measurable impact.

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