Senior ETL Developer (f/m/x)

Sii Poland; Białystok; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Profit sharing

Medical care

Centre of internal trainings

Open management

Job summary

Sii Poland is seeking a Senior ETL Developer to help transform our data-heavy analytical platform in the cloud. You will design scalable architectures, modernize legacy components, and optimize ETL processes using AWS tools, SQL Server, and SSIS.

Collaboration with engineers and analysts will be key to delivering robust, cost-efficient solutions. Responsibilities include leading architectural improvements, integrating ML-driven capabilities, and enforcing coding standards.

Qualifications

• 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.

Responsibilities

• 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

Skills

ETL development

Data modeling

Microsoft SQL Server

Python

English

Tools

SQL Server

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

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care

Job no. JOB-4NULP
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.