Senior Data Scientist

RoamlerAmsterdamHybridFull-time30 Sept 2026

Roamler is seeking a Senior Data Scientist to join its AI/ML platform team in Amsterdam (hybrid). The role involves owning and evolving classical ML/NLP enrichment pipelines and LLM-based components in production, requiring 5+ years of data science experience, Python, Spark, and cloud services.

What you'll do

Add value by finding data solutions that fit the business problems we want to solve for our customers.
Own and evolve our classical ML/NLP enrichment pipeline (matching, classification, embeddings) and the services that power all our data applications.
Design, build, and run LLM-based components in production, such as enrichment, classification, and entity matching, with prompt design treated as part of system design.
Choose the right tool for the problem: a state-of-the-art model, an LLM, a classical algorithm, or a smart business rule, weighing accuracy, cost, and latency.
Define evaluation methods and quality metrics so LLM and ML output can be trusted at the same bar as our rule-based systems, together with our data engineers.
Look beyond the pure data science scope: work together with our data engineers to get POCs into production.
Write production quality code.
Identify new opportunities in the large amount of data we collect every day in our data lake.
Collaborate with business and data stakeholders to align requirements and expectations.
Drive continuous improvement in our data science setup.
Foster a collaborative and enjoyable team environment through code reviews, knowledge sharing, and daily interactions.

What you need

Must-have

Pythonscikit-learnNumPypandasApache SparkPySparkMachine LearningNLP

Nice-to-have

AI agent frameworksComputer Vision

Soft skills

ProactiveResult-drivenHands-onCommunicationCollaborationKnowledge sharing

Data ScienceMachine LearningNLPLLMAISeniorHybridAmsterdamTechnologyEngineering Services

/What you'll do

/What you need

Must-have

Nice-to-have

Soft skills

What you'll do

What you need