Senior Machine Learning Engineer - Remote Opportunity

About the Role

We are looking for a Senior Machine Learning Engineer to join our team remotely. In this role, you will work closely with our partner in the e-commerce sector, one of the largest growing trading platforms in Central and Eastern Europe. As a Machine Learning Engineer remote, you will be responsible for building real-time systems that monitor and analyze data related to offers, prices, and inventory from both internal and external sources.

What You'll Do

• Support the preparation and training of AI/ML models, conducting A/B tests, and validating research hypotheses.
• Develop backend services using Kotlin/Java and process large volumes of data with Scala and BigQuery.
• Design, implement, and maintain data pipelines using Apache Airflow / Cloud Composer on GCP.
• Visualize analysis results and present them to business stakeholders (Data Storytelling).
• Ensure data reliability and quality in processing pipelines (Data Veracity).
• Participate in technical readiness service (on-call / incident response).
• Manage cloud infrastructure on GCP using Terraform.

Requirements

• Minimum 3-6 years of experience in Software Engineering.
• Experience with MongoDB (document modeling) and proficient SQL in the context of BigQuery.
• Experience working with Big Data systems and understanding performance challenges.
• Experience in Feature Engineering and understanding the full lifecycle of AI models.
• Knowledge of Python/Scala in the context of data processing (Apache Spark).
• Practical knowledge of Vertex AI (experiments, endpoints, Feature Store).
• Hands-on experience with Apache Airflow / Google Cloud Composer.
• Familiarity with GCP services and managing infrastructure through Terraform (IaC).
• Advanced understanding of statistical methods.
• Proficient in Kotlin or Java (backend).
• Fluent in English.

Nice to Have

• Experience with Looker Studio - building dashboards and BI visualizations.
• Creating frontend components in ReactJS.

What We Offer

• Projects with real impact; your code and models will operate on data from millions of transactions and influence the decisions of tens of thousands of sellers.
• Fully remote work; you can work from anywhere.
• Quarterly team meetings in Warsaw or Poznań to discuss what really matters.
• Stability and perspective; collaboration until the end of 2026 with the possibility of extension.
• Start ASAP and dive into the project immediately.
• Participation in integration meetings and tech meetups to share knowledge and experience.
• Support from a dedicated contact person from Connectis, available to assist with project-related matters.
• 5000 PLN for referring friends to our projects.
• Stable, long-term cooperation based on B2B.