Senior Data Scientist

H & M Hennes & Mauritz Sverige AB; Stockholms kommun; On-site; SEK 900,000 - 1,200,000; Full time

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

WHAT YOU'LL DO

As a Senior Data Scientist, you will work hands on to solve complex business and product problems using data and machine learning. You will collaborate closely with cross functional teams and be expected to work pragmatically, navigate ambiguity, and focus on delivering measurable impact.

• 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.

WHO YOU'LL WORK WITH

You will work in cross-functional teams together with colleagues in product, engineering, analytics, and business roles. You will also be part of a broader Data Science community, collaborating with other data scientists to share knowledge, align on best practices, and continuously improve how data science is applied across the organisation.

WHO YOU ARE

We are looking for people with the following skills and experience.

• A Bachelor's or Master's degree in Statistics, Engineering, Computer Science, or a related field.
• Strong theoretical and practical knowledge of statistics and machine learning.
• Proven experience developing and deploying machine learning 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 machine learning 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.

PLEASE NOTE

We will not be able to offer relocation for this role, so we will not be able to proceed with candidates living/working outside of Sweden.

BENEFITS

• All employees receive a 25% staff discount usable on all our H&M Group brands in stores and online.
• All employees are included in our H&M Incentive Program - HIP.
• 30 days holiday.
• We offer a collective agreement which includes pension and life insurance.
• Wellness benefit 4000kr/year (from Jan 1, 2026).
• Benify Benefits Portal.
• Community with activities.

LOCATION

Årstaängsvägen, Stockholm, Sweden