Senior Data Scientist – f/m/d

PAIR Finance

Senior Data Scientist optimizing the innovative product based on machine learning and AI at fintech company. Collaborating with diverse international team in a hybrid working environment.

Posted 7/8/2026full-timeBerlin • 🇩🇪 GermanySeniorWebsite

Tech Stack

Tools & technologies

AWSCloudFlaskMySQLNumpyOpen SourcePandasPostgresPythonPyTorchScikit-Learn

About the role

Key responsibilities & impact

Be part of our Data Science team to further optimize our innovative product based on machine learning and artificial intelligence
Work on advanced and demanding AI fields such as large language models
Identify, understand, structure and solve complex problems in a driven and pragmatic manner
Work on projects that deliver measurable value to our business
Experiment with new technologies and acquire new skills to find clever solutions to the unique challenges we will encounter along the way
Communicate between all stakeholders (data scientists, lead developers, product management, business owners) and present technical product concepts

Requirements

What you’ll need

Degree in Data Science, Computer Science, Mathematics or similar
6+ years experience as Data Scientist, ideally in a startup or fintech company
Extensive and hands-on experience with deployment of (ideally open source) LLMs (hosting, fine-tuning, prompt engineering, evaluation)
Experience automating complex processes using LLMs, reducing system latency, increasing efficiency, etc.
Deep knowledge of server management, GPU orchestration, and computational optimization techniques
Extensive experience with Python and with data processing packages (e.g. Pandas, Numpy) and machine learning frameworks (e.g. pytorch, scikit-learn, transformers)
Familiarity with web frameworks like Flask or FastAPI
Deep knowledge of relational databases such as MySQL or PostgreSQL
Experience with agile development practices such as TDD/BDD, continuous integration, refactoring, code reviews, etc.
Experience with cloud-based infrastructure solutions, such as AWS
Experience with reinforcement learning is a strong plus
Excellent English speaking and writing skills

Benefits

Comp & perks

Visa sponsorship
Thriving, financially stable company
Strong experienced international team to support and mentor you along the way, smooth onboarding process
International team of 30+ nationalities with professionals and experts
Flat hierarchy, transparent and appreciative feedback culture, monthly all hands meetings, annual feedback and evaluation cycle, regular 1-on-1s with your lead
Well-structured onboarding process as well as supportive and welcoming colleagues
Personal learning & development budget as well as German and English language courses
Unlimited employment contract, flexible working hours and 28 vacation days for your work-life balance
Company pension plan, partly covered Deutschlandticket (public transport) and access to “Corporate Benefits” voucher platform to ensure your full well-being
Fun company summer and Christmas parties as well as regular team events

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Data ScienceMachine LearningServer ManagementGPU OrchestrationComputational OptimizationRelational Databases (MySQL, PostgreSQL)Reinforcement LearningPrompt EngineeringContinuous IntegrationAutomating Complex Processes

Soft Skills

Problem SolvingCommunicationCollaboration