Senior ETL Developer (f/m/x)

Sii Poland

Kraków

On-site

PLN 180,000 - 240,000

Full time

14 days+

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Job summary

Sii Poland is seeking a Senior ETL Developer to join our team in Kraków and drive the cloud transformation of a data-intensive analytical platform. You will design scalable architectures, modernize legacy components and ensure performance, reliability, and cost efficiency in the cloud.

You will collaborate with software engineers, analysts and QA to deliver high‑quality solutions, leverage AWS technologies such as AWS Glue and AWS Lambda, and optimize ETL pipelines and SQL procedures.

Qualifications

Minimum 5 years of ETL development experience.
Experience with MS SQL Server and advanced query design.
Hands-on experience with ETL tools and AWS data services.
Strong English communication skills.

Responsibilities

Contribute to cloud transformation of a data-intensive analytics platform by designing scalable architectures and modernizing legacy components.
Lead continuous technological evolution by proposing and implementing modern frameworks and architectural improvements.
Expand analytical capabilities by developing and integrating advanced statistical methods and machine learning models.
Collaborate with software engineers, analysts and QA to design and build software solutions that meet business needs.
Ensure adherence to team design and coding procedures and standards.

Skills

ETL development

Microsoft SQL Server

Data modeling

English

Tools

SSIS

AWS Glue

AWS Lambda

Job description

We are looking for a Senior ETL Developer to join our team working on the cloud transformation of a data-intensive analytical platform. In this role, you will design scalable architectures, modernize legacy components, and ensure performance, reliability, and cost-efficiency in the cloud environment. You will collaborate closely with a team of software engineers, analysts, and quality engineers to deliver high-quality software solutions that meet business needs. If you are passionate about leveraging AWS technologies and optimizing ETL processes, this opportunity may be the right fit for you.

Your tasks

Contributing to the cloud transformation of a data-intensive analytical platform by designing scalable architectures and modernizing legacy components
Leading continuous technological evolution by proposing and implementing modern frameworks and architectural improvements
Expanding analytical and predictive capabilities by developing and integrating advanced statistical methods and machine learning models
Working closely with a team of software engineers and analysts to design and build software solutions that meet business needs
Ensuring adherence to team design and coding procedures and standards

Requirements

Minimum 5 years of experience in ETL development
Strong expertise in Microsoft SQL Server, including advanced query design and relational data modeling
Hands-on experience with SSIS for ETL pipeline design and optimization
Practical experience building ETL processes in AWS, including AWS Glue and AWS Lambda functions
Proven ability to optimize stored procedures and debug data flows across dependent components
Ability to enforce best practices in SQL coding standards and operational monitoring
Advanced level of English

Nice to have

Practical experience in the Healthcare IT domain
Experience in developing highly available architectures in the cloud
Strong knowledge of Microsoft Windows operating systems and development tools
Knowledge of statistical modeling methods
Hands-on experience with Python

Job no. JOB-MP8YV

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

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