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About the Role
Moss is expanding its Data & AI team and seeking a senior/lead contributor with hands-on LLM app/agent experience and fluency in classical ML. This role will own end-to-end LLM/ML initiatives, directly improving core product workflows.
Responsibilities
- Own LLM/ML pipelines for extraction, classification, anomaly detection, and recommendations.
- Define evaluation & monitoring: gold sets, automated tests, robustness checks, SLAs, and cost/latency tracking.
- Productionize with Platform/Data Eng: bring models live and iterate/improve until adopted by stakeholders.
Requirements
- 5-10+ years in applied ML with production ownership of shipping models/systems.
- Hands-on LLM app/agent experience (tool use/function calling, RAG, structured outputs, guardrails) in production.
- Strong Python + ML stack (e.g., scikit-learn, XGBoost/LightGBM, PyTorch/TF) and solid experiment/evaluation skills.
- Strategic Problem Solver: Approach ambiguous problems by deeply understanding business context and framing data science solutions that drive meaningful outcomes. Rigorously validate assumptions, identify root causes, and prioritize solving the right problem before building.
- End-to-End Executor: Independently own projects from ideation to production, balancing model performance with engineering realities. Ensure solutions are scalable, monitored, and maintained with thoughtful evaluation, deployment, and iteration strategies.
Skills
- LLM app/agent experience
- Classical ML
- Python
- scikit-learn
- XGBoost
- LightGBM
- PyTorch
- TensorFlow
- Experimentation
- Evaluation
Experience Level
- Senior
- Lead
- 5-10+ years
Salary/Compensations
- Top-of-market compensation package, including equity.
Benefits
- Equity
- 20 days “work from abroad”
- 600EUR/GBP Learning & Development Budget
- Other local benefits
About the Company
- Moss is a SaaS scale-up founded in Berlin, with a team of 300+ people from 50+ nationalities in 5 offices across Europe.
- Ambition: to power every SMB’s spend across Europe - fully digital, AI-driven, and seamlessly integrated for complete control.
- Over 5000 businesses in Germany, Netherlands and the UK use Moss’ leading spend management product.
- Modules include: corporate cards, accounts payables, employee cash reimbursements and procurement.
- Raised a total of €180 million in funding.
- Backed by investors including Valar Ventures, Tiger Global, Global Founders Capital, Cherry Ventures and A-Star.
- Culture thrives on impact and speed, where you can take bold moves, learn fast and accomplish more.
- Fast track your career.