Machine Learning Engineer
Offer summary

(Summary generated by AI based on the full job description)

The project focuses on recommender systems within the fitness and wellness domain, emphasizing building and optimizing ML models and data pipelines. The key tech stack includes Python, Spark, Airflow, AWS, Kubernetes. Responsibilities cover building and deploying ML models, maintaining pipelines, running A/B tests, cross-team collaboration, and supporting the transition to real-time systems. The offer includes full medical care, Multisport card, and MacBook Pro.

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Machine Learning Engineer

Company: Motife Sp. z o.o.

from: 9 June 2026
to: 9 July 2026
24 000 - 28 000gross/ mth.contract of employment (full-time)
Salary details
basic salary
Offer parameters
level:senior
working mode:hybrid
Warszawa, Wola
Warszawa, WolaGrzybowska 60View on map

Requirements

Expected technologies

Python
DynamoDB
AWS
Spark
Airflow

Optional technologies

Java
Kotlin
Go

Operating system

macOS

Our requirements

  • 3+ years of experience in machine learning, ideally in recommender systems, NLP, computer vision, or another applied ML domain.
  • Degree in Computer Science, Machine Learning, Statistics, Mathematics, Operational Research, or another highly quantitative field.
  • Hands-on experience building, training, evaluating, and improving machine learning models.
  • Strong software engineering fundamentals, including data structures, algorithms, clean code, and reproducibility.
  • Professional experience coding in Python; experience with Java, Kotlin, Go, C, or C++ is welcome.
  • Experience working with relational or non-relational databases such as Postgres, MySQL, Cassandra, or DynamoDB.
  • Familiarity with production ML systems, including deployment, monitoring, scalability, latency, and model-serving considerations.
  • Strong communication skills with the ability to explain technical concepts clearly to business, technical, and non-technical audiences.

Your responsibilities

  • Build, train, evaluate, and improve ML models powering personalized workout and content recommendations.
  • Develop and maintain AI/ML pipelines using Python, Spark, Airflow, AWS, and S3.
  • Research and apply modern machine learning techniques for recommender systems, content discovery, and engagement optimization.
  • Productionize, deploy, monitor, and optimize ML models and recommendation services.
  • Support the evolution of recommendation systems toward unified rankers, candidate generation, and real-time model serving.
  • Run A/B tests and analyze experiment results with Product Analysts to measure product and user impact.
  • Collaborate with ML Engineers, Software Engineers, Platform Engineers, Product Managers, and Product Analysts to test and launch new personalization ideas.
  • Work with platform and data teams to use internal infrastructure, data sources, and tools required to scale ML solutions.

About the project

We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere.
We are looking for a Machine Learning Engineer to join the Personalization team, which owns recommendation systems powering content discovery across the company’s digital ecosystem. In this role, you will build and improve ML models, data pipelines, and production services that deliver personalized recommendations to millions of users. You will work hands-on across the ML lifecycle, from research and experimentation to deployment and monitoring, while supporting the team’s transition toward more unified and real-time recommendation systems.
Key takeaways:
Stack: Python, Spark, Airflow, AWS, S3, Kubernetes, recommender systems, ML pipelines, A/B testing, REST/gRPC/FastAPI

This is how we organize our work

This is how we work

in houseyou develop several projects simultaneouslyyou have influence on the technological solutions appliedyou have influence on the productyou focus on product developmentyou focus on code maintenanceagile

Team members

backend developerfrontend developerfullstack developermobile developerdevOpsautomated test programmer

This is how we work on a project

  • Clean Code
  • Continuous Deployment
  • Continuous Integration
  • DevOps
If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.
Company

What we offer

  • 100% paid medical care
  • Multisport
  • Creative tax (KUP)
  • Home office allowance
  • MacBook Pro

Recruitment stages

  • 1.
    A call with MOTIFE Recruiter
  • 2.
    Coding interview (1h)
  • 3.
    Panel interviews with the team (2.5h)
Machine Learning Engineer
24k–28k zł / mth. (CoE)
I apply to:
Motife Sp. z o.o.
Warszawa, Wola
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