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Bartłomiej Rządowski

Bartłomiej Rządowski

Certified

BI Developer

BiSmart | Barcelona

Technologies

My Portfolio Highlights

My New Course

Introduction to Python

My New Course

Introduction to Python

Data whisperer, unlocking the secrets hidden within the numbers.

My Work

Take a look at my latest work.

DataLab

Intermediate SQL

course

Introduction to Python

DataLab

Intermediate SQL

DataLab

Intermediate SQL

My Certifications

These are the industry credentials that I’ve earned.

SQL Associate

SQL Associate

Python Data Associate

Python Data Associate

Other Certificates

Code with Mosh Complete SQL Mastery

IBM Working in a Digital World: Professional Skills

Microsoft Power BI Data Analyst Associate PL-300

Datahack Power BI IBM SkillsBuild

Datahack SQL IBM SkillsBuild

Microsoft Azure Fundamentals AZ-900

Databricks Databricks Fundamentals Accreditation

Microsoft GitHub Foundations

DataCamp SQL Associate

DataCamp Python Data Associate

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Introduction to SQL
Introduction to Power BI
Intermediate Python

My Work Experience

Where I've interned and worked during my career.

BiSmart | Apr 2025 - Present

BI Consultant

• Built and maintained Power BI dashboards end-to-end: data ingestion, data modeling (star schema), DAX measures, and advanced visuals—delivering actionable insights to business stakeholders. • Optimized semantic models with Tabular Editor (calculation groups, partitions, relationships) and SQL Server Analysis Services processing, improving report refresh and query performance. • Wrote production-grade SQL (Azure Synapse / SQL Server Management Studio) to create tables, stored procedures, and views; ensured data quality and governance across environments. • Developed and orchestrated ETL/ELT pipelines in Azure Data Factory, integrating sources into Azure Data Lake/Storage and Databricks for downstream analytics. • Built reusable PySpark/Python transformations in Databricks (joins, column engineering, schema/format updates) to scale analytics across large datasets. • Shipped features through Azure DevOps and Git: pull requests, branch strategy, merge conflict resolution, version control, and automated pipeline runs for deployments. • Partnered directly with business users and cross-functional Data Analysts / Data Scientists to scope requirements, run EDA, and translate findings into measurable outcomes. • Authored clear technical & functional documentation; tracked work and stakeholder comms in Jira (statuses, tickets, attachments). • Leveraged Copilot / ChatGPT for faster query writing, DAX templates, and documentation drafts—accelerating delivery while maintaining review standards. • Administered and navigated data in Azure Storage Explorer; managed credentials with KeePass in line with security best practices.
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Best in Bi Solutions | Mar 2024 - Apr 2025

Data Analyst

• Preparing training materials in Power BI • Initiated and managed client projects, fostering strong relationships to support ongoing collaboration and long-term partnerships • Designed and maintained SQL Server databases, including data preparation, cleaning, and manipulation to ensure data integrity • Extracting, transforming and loading data in SQL Server • Filtering and cleaning data in Power Query • Applied Data Analysis Expressions (DAX) for advanced data modeling and analysis in Power BI • Designed dashboards in Power BI • Built and optimized data pipelines in Microsoft Azure Data Factory in Microsoft Azure

TheFork, a TripAdvisor company | Mar 2022 - Oct 2023

Cash Collection Topic Expert

Create/modify reports in SQL/Snowflake, SalesForce, NiceinContact, Excel in order to analyze data and to share the results with executives • Visualize data in form of the dashboards • Collect or extract data for ad hoc tasks • Creating and maintaining databases • Improve operational internal processes to help team reduce the debt generated by restaurants • Create and monitor onboarding program for new hires • Close collaboration with operational team leaders and other internal stakeholders • Give support both locally and globally to the team on customers’ requests • Share best practices with the team and be the go-to-person for processes clarifications • Provide trainings to the team depending on the need

Cargill | Jan 2020 - Mar 2022

Collection Specialist

• Providing risk pre-analysis to the Credit Risk team to facilitate their order release and risk activities • Order Release • Manage collection activities for the assigned country, business, region or office customer portfolio • Contact and follow-up daily customers by phone or e-mails • The need to liaise with other Functions or Departments such as Allocation, • Logistics, Customer Support, Debt Collection, Analytics and Sales Department • Allocate money to proper accounts • Prepare the litigation file for Legal procedures. • Achieve yearly team Collection targets around Bad Debt and Cash-in amounts. • Participating in relevant meetings with Business personnel both Financial and Commercial. • Meeting with customers as and when required to resolve issues and relationship building. • Handling between 200-800 clients and 200-500 emails daily • Understanding operation programs such as SAP or Axapta

Sitel | Jan 2019 - Jan 2020

Customer Service Representative

• Providing first line support for Philips market in the area of small household appliances by phone, chat and emails • Providing first line fixesEnsuring that a high level of customer service and support is provided to allinternal and external customers • Escalating cases to different internal groups like: Online shop, Technical, Service related escalations and also to different external departments like: televisions,lightening, healtcare • Receiving incoming calls for non-technical and technical assistance, managing service requests, monitoring specific cases • Creating, monitoring, managing cases in Salesforce, Hybris and Quadra • Handling huge amounts of calls - between 60-80 calls per day from different customers

Unilever | Jan 2018 - Jan 2019

Master Data Specialist with Spanish

• Transferring processes from office in Barcelona to Katowice, which took 2 and half moths ( including 3 weeks in Barcelona) in order to be able to provide and improve those processes in Katowice and share the knowledge with other employees • Cooperating with Trade Terms in Katowice, IBM in Portugal and Sales group in Spain in order to provide external customers with annual and temporal discounts for Unilever's products and calculate them in SAP system • Generating reports in excel and SAP for Sales group and for main Unilever office in Barcelona • Applying invoices, unblocking billings, creating credit notes, provide payments by using the SAP system • Modifying data in SAP for entire OFF invoice Spanish Market

Rockwell Automation | Nov 2017 - Jan 2018

Technical Support Specialist

• Providing first line technical support for RA english speaking customers in the area of software activations • Providing assistance as required to the IT manager and support to colleagues in IT-related matters • Ensuring that a high level of customer service and support is provided to all internal and external customers • Creating documents what include instruction what to do to solve issues • Next level engineer (escalation) --> working with higher level of support and higher level of management in order to ensure high level of customer and company relationship • Receiving incoming calls for non-technical and technical assistance, managing service requests, monitoring specific cases • Providing first line fixes • Working with technical engineers, managers and other internal resources to facilitate the resolution of customer issue • Training of the new employees as well as technical in the subject of way of communicate with customer and also providing all most recent issues with examples

My Education

Take a look at my formal education

Management: Project Manager in MasterUniversity WSB Merito | 2023
Russian Business Language in BachelorUniversity of Silesia | 2017
Russian Business LanguageBaltic Academy Riga | 2016

About Me

Bartłomiej Rządowski

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