Wiktoria Cichosz
SQL/ETL Developer @ Link Group
About
Data Engineer with 5+ years of experience across enterprise data engineering and analytics projects. My background spans financial services — Credit Suisse and UBS — as well as an insurance data platform implementation involving policy, claims, and quote data. My core stack includes T-SQL, Python, SSIS, Azure Data Factory, Power Automate, and Alteryx, alongside BI tools such as Tableau, Power BI, and Qlik. I'm comfortable working across the full data pipeline — from source analysis and ETL development to automation, data modeling, and reporting handoff. I also have hands-on experience with Hadoop Data Lake environments and CI/CD processes in Databricks. I hold the Microsoft Azure Data Engineer Associate (DP-203) certification and continue to develop within the Azure ecosystem. Currently looking for B2B data engineering or data analytics contracts in Poland.
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Poland
Investment Banking
T-SQL, Azure Data Factory, Microsoft SQL Server, SSIS, Data Build Tool (DBT), Azure Data Engineer, ELT, ETL, Pipeline, Data Warehousing, Data Modelling, Databricks, NLP, Confluence, Data Lake, Hadoop, GitLab, SharePoint, Power Automate, Alteryx
Experience

SQL/ETL Developer
Warszawa
Worked on the implementation of a normalized data framework for an insurance industry client, covering policy, claims, and quote data. • Designed and built a multi-level T-SQL view hierarchy where each lower-level view referenced its parent, ensuring consistency and traceability across the data model • Analyzed SSIS packages to understand source data transformation logic (Excel, Access) and migrated that logic to stored procedures or Azure Data Factory pipelines • Built ADF pipelines from scratch and modified existing ones — including FTP-to-SQL file transfers and iterative stored procedure execution across multiple files • Participated in data mapping and gap analysis with the client, identifying fields without a counterpart in the target model and implementing automated extensions in T-SQL • Conducted SIT/UAT testing by comparing data and aggregations between DEV and UAT environments at the view level

Data Engineer Consultant for UBS
• Lead Automation Engineer: Spearheaded the automation segment of a bank-wide project related to the merger of Credit Suisse and UBS, ensuring seamless integration and process efficiency. • Integration Support: Supported the integration function by tracking key milestones and providing extensive change request automation, which ensured data accuracy across various divisions. • Power Automate Workflows: Delivered approximately 5 production-level Power Automate flows, enhancing workflow automation and operational efficiency. • Alteryx Data Transformation: Assisted the workforce team by transforming monthly allocation data in Alteryx, which is utilized in at least 7 Power BI dashboards for comprehensive reporting and analysis.

Data Engineer
Wrocław, Woj. Dolnośląskie, Polska
• Python Automations: Developed various automation scripts including scraping task scheduler logs using xml.etree library for reading .EVTX files, executing data lake queries via Python and storing results in MS SQL Server. • Tableau Server Scraping: Extracted table connections from dashboard queries on Tableau Server to streamline data dependencies. • NLP Clustering: Implemented NLP clustering techniques to identify and categorize the most common error groups, enhancing error resolution efficiency. • Tableau Dashboard Development: Created comprehensive Tableau dashboard to present project's history dating back to 2010, enabling clear and insightful data visualization. • Invoice Automation: Automated invoice preparation and email dispatch to vendors using Python libraries such as smtplib and email.MIME. • BAU Data Lake Tasks: Managed business-as-usual tasks involving the Data Lake, including data onboarding and creation of current tables to support ongoing data needs. • ServiceNow Data Management: Collaborated within a team responsible for owning and managing ServiceNow data, ensuring accurate and efficient data handling.

Information Technology Analyst / Qlik Developer
Wrocław, Woj. Dolnośląskie, Polska
Key Responsibilities: - Developing dashboards (collecting data in SQL, data preparation, visualization) - Maintaining dashboards (implementation of new requirements, fixing bugs, enhancing usability/performance) - Deep-dive R Studio retrospective data analysis project - Ad hoc SQL/Excel data analysis for business cases - Preparing PROD releases (GIT versions, documentation) - Preparing training videos, maintaining confluence pages (UAT test cases, change log) - Active participation in Scrum meetings

Back Office Assistant
Smarts BPO
Wrocław, Woj. Dolnośląskie, Polska
Wiktoria Cichosz's Contact Information
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