Senior ML Engineer (m/f/d)

Praxy; Köln; Hybrid; EUR 70.000 - 110.000; Vollzeit

Benefits dieser Stelle

Urban Sports Club membership

Mental Health support with Likeminded

Work from Home up to 20 EU days

Deutschland Ticket fully costed

Personal development trainings

And many more

Zusammenfassung

Praxy is seeking a Machine Learning Engineer to design, build, and operate ML systems for retail media use cases such as sponsored product ranking and audience segmentation. You will translate business requirements into scalable solutions, balancing quality, latency, reliability, and maintainability.

Join a cross-functional team with product managers, engineers, and commercial stakeholders. You will own production-grade pipelines, monitor models, and contribute to ML engineering standards while

Qualifikationen

• Several years of hands-on experience in ML engineering or ML-focused software.
• Experience building and operating production-grade ML systems and pipelines.
• Experience with retail media, recommender systems, or ranking is a plus.
• Ability to explain complex topics clearly to non-technical stakeholders.
• Ownership mindset and comfort navigating ambiguity in early-stage products.

Aufgaben

• Design, build, and operate ML systems for retail media use cases.
• Translate business requirements into scalable ML solutions balancing quality, latency, and reliability.
• Develop robust ML pipelines for feature engineering, training, evaluation, deployment, and monitoring.
• Bring models into production using cloud-based stack and ensure observability over time.
• Communicate technical decisions and uncertainties to product, engineering, and business stakeholders.
• Contribute to ML engineering standards and knowledge sharing within the team.

Kenntnisse

Machine Learning

Software Engineering

Data Scientist

Jobbeschreibung

• Work with colleagues from our Data & AI department and collaborate closely with product managers, engineers, and commercial stakeholders.
• Design, build, and operate machine learning systems for retail media use cases such as sponsored product ranking, audience segmentation, campaign optimization, attribution, and performance measurement.
• Translate business and product requirements into scalable ML solutions, balancing model quality, latency, reliability, scalability, and maintainability.
• Develop robust ML pipelines for feature engineering, training, evaluation, deployment, monitoring, and continuous model improvement.
• Bring models into production using our cloud-based stack and ensure they are reliable, observable, and maintainable over time.
• Communicate technical decisions, assumptions, limitations, and uncertainty clearly to product, engineering, and business stakeholders.
• Contribute to ML engineering standards, best practices, and knowledge sharing within the team.

About you:

• You have several years of hands‑on experience as a Machine Learning Engineer, ML‑focused Software Engineer, or Data Scientist with strong engineering experience.
• You have built and operated production‑grade machine learning systems, pipelines, or model‑based products.
• You have experience working with retail media, or alternatively recommender systems or ranking.
• You are comfortable working with complex data and understand common ML failure modes such as data leakage, feedback loops, distribution shifts, and misleading offline metrics.
• You enjoy working close to the business and can explain complex technical topics clearly to non‑technical stakeholders.
• You take ownership, work proactively, and are comfortable navigating ambiguity in an early‑stage product environment.
• You value collaboration, give and receive feedback openly, and enjoy helping others grow.

In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits:

• Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers.
• Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge.
• Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU.
• Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more.
• Personal development: Grow! We support and encourage your individual development through various in- and external trainings.
• And many more