Data & Reporting Senior Developer in Kraków

ALTEN – A Global Leader in Engineering and IT Services. ALTEN Polska has been operating for 13 years, supporting its clients' innovation, research and development, and IT systems. It serves key industries such as aerospace, space, industrial solutions, automotive, railway, energy, finance, telecommunications, and retail.

What You’ll Do:

• Deliver end-to-end data projects, including data discovery, cleansing, transformation, validation, aggregation, and KPI development.
• Design and maintain scalable data models based on multiple data sources, ensuring alignment with business requirements and data standards.
• Perform data matching, linking, and reconciliation across complex datasets.
• Develop and optimize reporting solutions, dashboards, and analytical outputs using SQL, Python, and cloud-based data platforms.
• Ensure secure and reliable data movement between source and target systems.
• Collaborate with business stakeholders to gather requirements, understand process logic, and translate business needs into technical solutions.
• Analyze large datasets to identify insights, trends, and opportunities for process improvement.
• Proactively identify risks, dependencies, and blockers, and drive mitigation actions.
• Create and maintain clear documentation, including process maps, solution designs, and technical specifications.
• Lead assigned initiatives, facilitate stakeholder discussions, and monitor project delivery progress.
• Support continuous improvement initiatives focused on data quality, efficiency, and reporting capabilities.

Requirements:

• 5+ years of experience in a data-focused role, such as Data Analyst, Data Engineer, SQL Developer, Data Architect, or Data Modeller.
• Expert-level SQL skills with strong knowledge of relational database design, optimization, query tuning, indexing, and data modelling.
• Hands-on experience with data analysis, data transformation, and data integration processes.
• Strong understanding of ETL processes, data warehousing concepts, and data management best practices.
• Experience building business reports, dashboards, and analytical solutions for operational or strategic decision-making.
• Proficiency in Python for data processing, automation, and analytics is highly desirable.
• Experience working with cloud-based data platforms, particularly Google Cloud Platform (GCP), including BigQuery and reporting tools.
• Ability to work with complex datasets and translate business requirements into scalable technical solutions.
• Strong analytical and problem-solving skills with a proactive, solution-oriented mindset.
• Experience managing priorities, risks, and stakeholder expectations in a dynamic environment.
• Excellent communication and stakeholder management skills.
• Fluent English, both written and spoken.
• Self-driven, collaborative, and focused on delivering high-quality results with a continuous improvement mindset.

We offer:

• A full-time employment contract.
• Stable and long-term cooperation.
• Well-defined career path at the European leader in engineering & IT consulting.
• Participation in company conferences, trainings, workshops, integration meetings, etc.
• Certification and training opportunities.
• Opportunity to relocate and work in different ALTEN Polska branches.
• After completion of the project, opportunity to engage in a subsequent one within the company.

Benefits:

• Medicover medical care.
• Medicover dental care.
• Medicover Benefits platform.
• Medicover Sport card.
• Referral Program.
• Layette for a newborn employee’s child.
• Group life insurance.
• Pension scheme.

We also offer cooperation based on a B2B or Contract of mandate (UZ). As part of this cooperation, you may have the opportunity to access various benefits and participate in additional initiatives.

Join our team and let’s build tomorrow’s world today!