Senior Data Engineer (Python / AWS / ML Pipelines)

Lever, Inc.; Polska; On-site; PLN 120,000 - 160,000; Full time

Benefits offered by this job

Flexible working arrangements

Healthcare benefits

Career development

Job summary

Lever, Inc. is seeking a Senior Data Engineer in Poland to build and operate large-scale data and machine learning pipelines. The role focuses on Python, AWS, ETL, workflow orchestration, and scalable ML infrastructure in production.

You will collaborate with Data Scientists and ML Engineers to productionize forecasting and data-driven solutions while improving reliability, observability, and performance across pipelines in distributed Agile teams.

Qualifications

• Strong experience with Python for data engineering and production systems.
• Proven experience building data pipelines and ML pipelines in production.
• Hands-on experience with Apache Airflow for workflow orchestration.
• Practical experience with AWS Step Functions and AWS Glue.
• Experience deploying and supporting ML models using AWS SageMaker.
• Experience with AWS cloud services in production environments.
• Experience with large-scale systems focusing on reliability and performance.
• Excellent written and verbal English communication skills.

Responsibilities

• Build, operate, and optimize production-grade data and ML pipelines in a distributed environment.
• Develop ETL and data-processing workflows using Python.
• Design and orchestrate workflows with Airflow and AWS Step Functions.
• Utilize AWS Glue for data processing and transformation.
• Deploy ML models with AWS SageMaker into production.
• Collaborate with Data Scientists and ML Engineers to productionize solutions.
• Monitor pipeline health and improve reliability and performance.
• Contribute to architectural decisions for data platform and ML infra.

Skills

Python

Data pipelines

ML pipelines

Airflow

AWS

SageMaker

Glue

Step Functions

Cloud production

English communication

Tools

Apache Airflow

AWS Step Functions

AWS Glue

AWS SageMaker

Job description

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Engineer (Python / AWS / ML Pipelines) based in Poland.

As a Senior Data Engineer, you will build and operate large-scale data and machine learning pipelines in a production environment.
You will work across data engineering, cloud infrastructure, and machine learning operations to turn models into reliable production workflows.
The role focuses heavily on Python, AWS, ETL, workflow orchestration, and scalable ML infrastructure.
You will collaborate closely with Data Scientists and ML Engineers to productionize forecasting and data-driven solutions.
You will also help improve the reliability, performance, and observability of critical data pipelines.
Working within distributed Agile teams, you will contribute to architecture decisions and technical improvements across the data platform.
This is an opportunity to work on challenging production systems while continuing to develop your cloud and ML engineering expertise.

Accountabilities

• Build, maintain, and improve production-grade data and machine learning pipelines supporting forecasting and data-driven decision-making.
• Develop ETL and data-processing workflows using Python, ensuring they are scalable, reliable, and maintainable.
• Design and orchestrate workflows using technologies such as Apache Airflow and AWS Step Functions.
• Use AWS Glue for data processing, transformation, and pipeline execution.
• Support the deployment and operationalization of machine learning models using AWS SageMaker.
• Work closely with Data Scientists and ML Engineers to move models and analytical solutions reliably into production.
• Monitor pipeline health and performance, troubleshoot production issues, and implement improvements to reliability, scalability, and efficiency.
• Contribute to architectural and technical decisions related to the data platform, ML infrastructure, and production workflows.
• Collaborate effectively with distributed, cross-functional Agile teams and contribute ideas that improve engineering practices and delivery.

Requirements:

• Strong professional experience with Python and its application to data engineering and production systems.
• Proven experience building and maintaining data pipelines and/or machine learning pipelines in production.
• Hands‑on experience with Apache Airflow for workflow orchestration.
• Practical experience with AWS Step Functions and AWS Glue.
• Experience deploying and supporting machine learning models using AWS SageMaker.
• Strong hands‑on experience with AWS cloud services and cloud-based production environments.i
• Experience working with systems operating at significant scale, with a strong understanding of reliability and performance considerations.
• Experience collaborating closely with Data Scientists, ML Engineers, and other technical stakeholders.
• Strong troubleshooting, analytical, and problem‑solving abilities.
• Excellent written and verbal English communication skills.
• Comfortable working independently and collaboratively within distributed, cross‑functional teams.
• Experience with GCP is a plus but not required.
• Familiarity with monitoring and observability tools is also advantageous.

Benefits:

• Collegial working environment where responsibility and decision-making are shared across the team.
• Agile culture where employees are encouraged to contribute ideas and influence technical direction.
• Supportive approach to learning from mistakes and continuously improving ways of working.
• Opportunities to work on different projects and broaden your technical experience.
• Ongoing training, mentoring, and professional development.
• Opportunities for career growth and exposure to new technologies and challenges.
• Possibility of business travel.
• Flexible working arrangements appropriate to a distributed team.
• Additional salary, healthcare, and other employment benefits may vary according to local terms in Slovenia.