Senior Machine Learning Engineer – Babbel Labs

Jobtailor; Berlin; Vor Ort; EUR 90.000 - 130.000; Vollzeit

Zusammenfassung

Jobtailor in Berlin is seeking an experienced ML Engineer to own personalization models and production-grade pipelines. You will collaborate with a Principal Scientist to translate designs into scalable services and shape new features from scratch.

You will implement robust offline benchmarks, monitor for issues, and maintain live scoring systems. Proficiency in TypeScript, Python, AWS, Terraform and CI/CD is required.

Qualifikationen

• Strong, hands-on ML engineering experience shipping real models to production.
• Experience with recommendation, ranking, scoring, or trust-and-safety systems under real user load.
• Experience with probabilistic modeling, latent-variable modeling and Bayesian inference, or equivalent rigor from an adjacent domain.
• Experience evaluating ML systems, defining monitoring metrics, debugging anomalous outputs, and safely rolling out changes to live scoring or ranking systems.
• Rigorous experimentation practice, including benchmarking against a real baseline and running or correctly interpreting A/B tests.
• TypeScript and Python as primary languages.
• Sufficient AWS, Terraform, and CI/CD knowledge to ship and own service delivery.
• Experience using coding agents daily and verifying their output.
• Nice to have: psychometric models such as Item Response Theory
• Nice to have: graph ML experience, including embeddings, graph neural networks, or relational modeling at scale
• Nice to have: open-source contributions, writing, or competitive ML

Aufgaben

• Own real personalisation and mastery-tracking subsystems end to end.
• Work with the Principal Scientist to take designs from specification into production.
• Shape new features from the beginning, beyond implementing predefined specifications.
• Improve the personalisation engine independently and make confident technical decisions.
• Design rigorous offline benchmarks against real baselines and online experiments to validate changes.
• Instrument systems, monitor for silent failures, and resolve issues before incidents occur.
• Operate and maintain production ML systems over time.
• Deliver software using coding agents and verify their output.

Kenntnisse

ML Engineering

Production Deployment

Probabilistic Modeling

A/B Testing

TypeScript

Python

AWS

Terraform

CI/CD

Coding Agents

Tools

AWS

Terraform

CI/CD

Coding Agents

Jobbeschreibung

• Own real personalisation and mastery-tracking subsystems end to end
• Work with the Principal Scientist to take designs from specification into production
• Shape new features from the beginning, beyond implementing predefined specifications
• Improve the personalisation engine independently and make confident technical decisions
• Design rigorous offline benchmarks against real baselines and online experiments to validate changes
• Instrument systems, monitor for silent failures, and resolve issues before incidents occur
• Operate and maintain production ML systems over time
• Deliver software using coding agents and verify their output

Requirements

• Strong, hands-on ML engineering experience shipping real models to production
• Experience with recommendation, ranking, scoring, or trust-and-safety systems under real user load
• Experience with probabilistic modeling, latent-variable modeling and Bayesian inference, or equivalent rigor from an adjacent domain
• Experience evaluating ML systems, defining monitoring metrics, debugging anomalous outputs, and safely rolling out changes to live scoring or ranking systems
• Rigorous experimentation practice, including benchmarking against a real baseline and running or correctly interpreting A/B tests
• TypeScript and Python as primary languages
• Sufficient AWS, Terraform, and CI/CD knowledge to ship and own service delivery
• Experience using coding agents daily and verifying their output
• Nice to have: psychometric models such as Item Response Theory
• Nice to have: graph ML experience, including embeddings, graph neural networks, or relational modeling at scale
• Nice to have: public technical work such as open-source contributions, writing, or competitive ML

Core Competencies

Demonstrates expertise in Machine Learning Engineering, with a focus on shipping models to production, evaluating ML systems, and conducting rigorous experimentation. Proficient in TypeScript and Python, with experience in AWS, Terraform, and CI/CD for effective service delivery.

Highest-signal resume keywords

• Machine Learning Engineering
• Production Model Deployment
• Probabilistic Modeling
• A/B Testing
• AWS and Terraform

Hard Skills

• Machine Learning
• Probabilistic Modeling
• Latent-Variable Modeling
• Bayesian Inference
• TypeScript
• Python
• Benchmarking
• Debugging
• Graph ML
• Item Response Theory

Soft Skills

• Technical Decision-Making
• Independent Problem-Solving

Industry Keywords

• Personalisation Engine
• Recommendation Systems
• Ranking Systems
• Scoring Systems
• Trust-and-Safety Systems

Tools & Technologies

• AWS
• Terraform
• CI/CD
• Coding Agents