# Senior Data Scientist (f/m/d) at PAIR Finance

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Develop and optimize ML/AI components of

- **Company:** PAIR Finance (https://jobs.trythestack.co/companies/pair-finance)
- **Location:** Germany
- **Work arrangement:** On-site
- **Employment type:** Permanent
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Large Language Models, Python, PyTorch, Scikit-learn, Transformers, Pandas, Numpy, Flask, FastAPI, MySQL, PostgreSQL, AWS, GPU Orchestration, Reinforcement Learning, TDD/BDD, Prompt Engineering
- **Posted by employer:** 2026-07-08
- **Added to The Stack:** 2026-07-08
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://pair.jobs.personio.com/job/2045833 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-data-scientist-fmd-pair-finance

## About the role

Responsibilities:
- Develop and optimize ML/AI components of our product with a strong focus on large language models (LLMs).
- Deploy, host, fine-tune and evaluate open-source LLMs for production use.
- Design and implement automation using LLMs to reduce latency and operational cost.
- Improve system performance via GPU orchestration and computational optimization techniques.
- Build and integrate backend services (Flask/FastAPI) and database interactions for ML features.
- Collaborate with data scientists, lead developers, product managers and business owners; present technical concepts and trade-offs.
- Run experiments, measure impact, and deliver projects that produce measurable business value.

Requirements:
- Degree in Data Science, Computer Science, Mathematics or related field.
- 6+ years’ experience as a Data Scientist, preferably in startups or fintech.
- Hands-on experience deploying and fine-tuning LLMs; strong prompt engineering and evaluation skills.
- Advanced Python skills and experience with Pandas, NumPy, PyTorch, scikit-learn, and transformers.
- Familiarity with web frameworks (Flask/FastAPI) and relational DBs (MySQL/PostgreSQL).
- Knowledge of cloud infra (AWS), GPU orchestration and performance optimization.
- Experience with TDD/BDD, CI, code reviews and agile development.
- Reinforcement learning experience is a plus; excellent English communication skills.

## Responsibilities

Optimize innovative products using machine learning and artificial intelligence, specifically focusing on large language models. Collaborate with stakeholders to solve complex problems and deliver measurable business value through technical product concepts.

## Requirements

Requires a degree in Data Science, Computer Science, or Mathematics with over 6 years of experience, ideally in fintech. Must have hands-on expertise in LLM deployment, Python, machine learning frameworks, and cloud infrastructure.

## FAQ

- **Is this Senior Data Scientist (f/m/d) role still open?** It was posted on 2026-07-08. Listings more than 30 days old may no longer be active, so check PAIR Finance's site before applying.
- **Does PAIR Finance offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on PAIR Finance's site.
- **Where is this role located?** The listing gives the location as Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: Large Language Models, Python, PyTorch, Scikit-learn, Transformers, Pandas, Numpy, Flask, FastAPI, MySQL, PostgreSQL, AWS, GPU Orchestration, Reinforcement Learning, TDD/BDD, Prompt Engineering.

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