Michał is available for hire
Hire MichałMichał Kaliński
Verified Expert in Engineering
Data Analyst and BI Developer
Warsaw
Toptal member since February 15, 2022
Bio
Michał is a seasoned software developer passionate about data, from analysis and transformation to presentation. He has a professional career of 15+ years in the IT field and more than five in BI development with Tableau, SQL, Oracle, and Excel. Michał enjoys working with Tableau, deep-dive into the client's needs, presenting and delivering stunning dashboards that not only showcase the data but that walk users through creating a unified experience towards conclusions.
Portfolio
Billennium
Tableau, SQL, HTML, CSS, Python, Oracle, Agile, Scrum, Snowflake...
Woven by Toyota, Inc - Woven IT USA
Tableau, Jira, Data Visualization, Proof of Concept (POC), Data Pipelines...
Woven by Toyota, Inc - Woven IT USA
Tableau, Jira, Data Visualization, Proof of Concept (POC), PostgreSQL...
Experience
- SQL - 15 years
- Excel VBA - 10 years
- SQL Server DBA - 8 years
- Agile Project Management - 8 years
- Dashboards - 6 years
- Data Visualization - 6 years
- Tableau Desktop Pro - 6 years
- Agile - 5 years
Preferred Environment
Tableau Desktop Pro, SQL
The most amazing...
...thing I've built is a predictive app. It is used by the client as the base to year-to-year budget discussions to calculate the hourly engineering rate.
Work Experience
Senior Tableau Architect
2018 - PRESENT
Billennium
- Played a key role in cooperating with Billennium's customers in the BI projects.
- Designed Tableau, data, big data, software, and business solutions.
- Led and coordinated the software development team.
- Created PoCs and reports for several clients, answering their needs.
- Collaborated on designing and delivering a sales dashboard for a monitoring system.
- Developed a set of dashboards for a TV company with Tableau and Snowflake cooperation.
Technologies: Tableau, SQL, HTML, CSS, Python, Oracle, Agile, Scrum, Snowflake, Business Intelligence (BI), Tableau Server, Google Sheets, APIs, Data Analysis, Data Analytics, Dashboard Development, PostgreSQL, Data Modeling, Redshift, Data Engineering, Dashboard Design, Amazon Web Services (AWS), Microsoft Power BI, Data Reporting, Data Science, Relational Databases, Data Integration, Database Architecture, ETL, Data Structures, Data Warehousing, Microsoft SQL Server, Microsoft Excel, JSON, Transact-SQL (T-SQL), Google Data Studio, CSV, Business Analysis, Windows, Database Administration (DBA), Databases, Data Warehouse Design, Reporting, Reports, Visual Basic for Applications (VBA), Microsoft Word, ETL Tools, Tableau Desktop, Tableau API, Web Dashboards, SharePoint, Microsoft PowerPoint, Git, Data Governance, Data Architecture, Excel 2016, UI Design, Excel Macros, Looker, Looker Studio, Data Pipelines, AWS Lambda, Trend Analysis, Key Performance Indicators (KPIs), Business, Data Build Tool (dbt)
Tableau Dashboard Developer
2025 - 2025
Woven by Toyota, Inc - Woven IT USA
- Developed and tested functional parts of automotive software, covering unit, integration, and custom tool-based testing.
- Led automation processes for software deployment (SPL) and documentation generation (Doxygen) across multiple repositories.
- Designed and implemented GitHub Actions and workflows for automated testing, deployment, packaging, and CI/CD pipelines.
- Maintained Git repository management, supported PR reviews, and authored onboarding documentation to accelerate team adoption of SPL and Arene Lab.
- Delivered data insights and business analytics using Tableau and Power BI with Python-based ETL and data mining.
- Utilized Python, C++, C, scripting languages, YAML, and Linux to support development and testing pipelines; initiated Android and REST API integration efforts.
- Partnered with remote, cross‑timezone teams to resolve complex Bazel build and workflow issues.
- Demonstrated adaptability, quickly learning unfamiliar technologies to enhance cross‑repository support and developer productivity.
- Demonstrated core skills, including Python, C++, C, GitHub Actions, YAML, Linux, Tableau, Power BI, data mining, ETL, Doxygen, SPL, Bazel, Android, REST API, automation, testing (manual and automated), and agile collaboration.
Technologies: Tableau, Jira, Data Visualization, Proof of Concept (POC), Data Pipelines, Trend Analysis, Key Performance Indicators (KPIs), Business
Tableau Dashboard Developer
2023 - 2024
Woven by Toyota, Inc - Woven IT USA
- Conducted data mining from the Jira database, decoding and transforming data into a user-friendly format for further analysis, incorporating ETL transformation, data cleanup, and database verification.
- Set up a PostgreSQL database with ETL procedures to prepare data at various stages, implementing business logic for usage and reporting.
- Developed a Tableau report for detailed Jira data visualization across various levels, such as projects, teams, managers, topics, epics, and issues.
- Created a Tableau dashboard including performance, budget, completion, and milestone metrics to provide easy-to-use, immediate insights for management.
Technologies: Tableau, Jira, Data Visualization, Proof of Concept (POC), PostgreSQL, Data Pipelines, Trend Analysis, Key Performance Indicators (KPIs), Business
Data Engineer
2022 - 2023
Radiant Law Limited
- Cooperated in defining the full matter workflow to generate key data for reporting purposes in the MySQL database. Developed a set of procedures to create a data transformation/aggregation pipeline.
- Developed and maintained Tableau dashboards to report law matters at various dimensions, levels, and calculations.
- Collaborated closely with the CEO to define the BI solution path for reporting and maintenance. Redefined the previous R code to redirect to the database-scheduled automated workflows.
Technologies: Tableau, R, Dashboards, Data Visualization, Data Engineering, MySQL, Business Intelligence (BI), Tableau Server, Data Analysis, Data Analytics, Dashboard Development, Data Modeling, Dashboard Design, Data Reporting, Relational Databases, Data Integration, Database Architecture, ETL, Data Structures, Data Warehousing, Microsoft Excel, JSON, Transact-SQL (T-SQL), CSV, Business Analysis, Windows, Database Administration (DBA), Databases, Reporting, Reports, Automation, Microsoft Word, ETL Tools, Tableau Desktop, SharePoint, Microsoft PowerPoint, Data Governance, Data Architecture, Excel 2016, UI Design, Excel Macros, PostgreSQL, Data Pipelines, Trend Analysis, Key Performance Indicators (KPIs), Business
BI Consultant
2020 - 2022
ITDS
- Collaborated with the client, UBS, providing consultancy expertise in proofs-of-concept (POC) development, report optimization, and BI systems design.
- Added new clients and new Tableau solutions to the company's portfolio.
- Developed competencies in big data solutions and banking operations.
- Designed Tableau, business solutions, and PoCs for several clients.
- Optimized and implemented new solutions on the clients' BI software, following best practices.
- Collaborated on the design and delivery of model relations dashboards.
- Engaged with several professionals while working on the banking report solution.
- Helped recruit new team members, ensuring they met the required technical knowledge.
Technologies: Tableau, Agile, Scrum, SQL, Jira, Data Visualization, Dashboards, Business Intelligence (BI), Tableau Server, Data Analysis, Data Analytics, Dashboard Development, Data Modeling, Data Engineering, Dashboard Design, Amazon Web Services (AWS), Data Reporting, Data Science, Relational Databases, Data Integration, Database Architecture, ETL, Data Structures, Data Warehousing, Microsoft SQL Server, Microsoft Excel, Transact-SQL (T-SQL), Google Data Studio, CSV, Business Analysis, Microsoft Power BI, Windows, Database Administration (DBA), Databases, Data Warehouse Design, Reporting, Reports, Automation, Visual Basic for Applications (VBA), Microsoft Word, ETL Tools, Tableau Desktop, HTML5, Web Dashboards, SharePoint, Microsoft PowerPoint, Data Governance, Data Architecture, Excel 2016, UI Design, Data Pipelines, Trend Analysis, Key Performance Indicators (KPIs), Business
Co-founder and IT Consultant
2017 - 2019
KRK Partnerzy Digital Solutions
- Co-founded a technological and business organization focused on IT and BI services.
- Acquired experience in day-to-day management and supervision.
- Managed clients, team-building exercises, and software, as remote specialists.
- Conceptualized and built a digital project to predict work efficiency granted by the EU founding.
- Supervised web page development as part of my role.
Technologies: Agile, Scrum, Waterfall Development, Tableau, .NET, SQL, PHP, JavaScript, Data Integration, Database Architecture, ETL, Data Structures, Microsoft SQL Server, Microsoft Excel, Windows, Databases, Reports, Microsoft Word, HTML5, SharePoint, Microsoft PowerPoint, Excel 2016, UI Design, Excel Macros, Trend Analysis, Key Performance Indicators (KPIs), Business
Senior Data Engineer
2017 - 2018
Baker Hughes, a GE Company
- Owned the BI environment, cloud and stationery, the data warehouse (SQL Server, Greenplum), and Tableau reports.
- Supported 20 projects with day-to-day and ad hoc reporting needs.
- Managed the complete software solution in close cooperation with internal customers as the consulting expert on BI trends.
- Followed Agile and Scrum methodologies throughout project management.
Technologies: Tableau, SQL, HTML, CSS, Oracle, Greenplum, SQL Server DBA, Business Intelligence (BI), Tableau Server, APIs, Data Analysis, Data Analytics, Dashboard Development, Data Modeling, Data Engineering, Data Reporting, Relational Databases, Data Integration, Data Structures, Microsoft SQL Server, Microsoft Excel, Transact-SQL (T-SQL), Microsoft Data Transformation Services (now SSIS), CSV, Windows, Database Administration (DBA), Databases, Reporting, Reports, Automation, Microsoft Word, ETL Tools, Tableau Desktop, Microsoft PowerPoint, Excel 2016, UI Design, Excel Macros, Data Pipelines, Trend Analysis, Business
Lead Software Engineer
2015 - 2017
GE Company Polska (EDC)
- Developed, updated, and managed SQL servers and the data flow DB integration process.
- Used a SQL EDC DB to create business quality and operations metrics.
- Developed, under request, C#, VBA, Access, and batch files business tools to help integrate the whole process.
- Implemented Tableau for reports and data preparation.
- Doubled the operational reports portfolio by adding reports based on demand and capacity.
- Created and standardized the work in SQL server and Tableau environment, increasing the number of frequent users by more than 40%.
- Prepared SQL queries of ad-hoc and regular business data reports.
- Participated in the business operations meetings to update business strategy upon metrics and results.
- Provided business-level user support for operational metrics data consistency, SQL, and Tableau.
- Acted as a coach in Excel VBA EDC at the center of skills of excellence.
Technologies: Tableau, SQL, HTML, CSS, Oracle, Greenplum, SQL Server DBA, Business Intelligence (BI), Tableau Server, Data Engineering, Relational Databases, Data Integration, Data Structures, Microsoft SQL Server, Microsoft Excel, Transact-SQL (T-SQL), Microsoft Data Transformation Services (now SSIS), CSV, Windows, Databases, Automation, Visual Basic for Applications (VBA), Microsoft Word, Tableau Desktop, Microsoft PowerPoint, Excel 2016, Excel Macros
Lecturer
2013 - 2015
Kotarbinski University of Information Technology and Management in Olsztyn
- Planned, created, and delivered lessons for classes of 11 to 20 students in the fields of mechatronics and information.
- Taught students across Excel, VBA, script languages, MATLAB, design, and coding principles.
- Collaborated with other professionals in defining best practices to help students deliver the best results.
Technologies: MATLAB, Excel VBA, Microsoft Excel, Windows, Automation, Microsoft Word, Microsoft PowerPoint, Business
Lead Software Engineer
2008 - 2015
GE Company Polska (EDC)
- Developed, maintained, and implemented business and engineering applications while participating in other programming tasks for the oil and gas industry.
- Improved my competencies and skills as a developer and SQL database administrator.
- Engaged with multiple stakeholders, including business users, IT developers, high managers, CEOs, global organizations, sales, metrics department, local office community, engineering, operations, quality, project management, and HR.
- Worked in application development and bug fixing.
- Participated in all project planning phases, prepared programming documentation, designed and performed application testing, and owned SQL database management tasks.
Technologies: C#, Visual Studio, SQL, Perforce, Windows Presentation Foundation (WPF), Oracle, Excel VBA, Agile, Scrum, Relational Databases, Data Integration, Data Structures, Microsoft SQL Server, Microsoft Excel, Windows, Databases, Automation, Visual Basic for Applications (VBA), Microsoft Word, Microsoft PowerPoint, Business
Experience
Prediction Dashboard for an Engineering Site
Built a prediction dashboard for an engineering company's site with over 1,000 employees. It provides automatical calculations of unified hourly rate based on a customized model, including actual demand, upcoming projects, and predicted costs versus capacity and working culture.
Pharma Accessibility and Validation Dashboards
Pharma dashboards depict accessing medicines along countries, regions, and markets based on various kips being calculated and presented to concerned stakeholders. Validation of rules and data consistency is based on external and internal systems and repositories.
TV Dashboards
Built a set of TV dashboards to analyze programs and products viewership and purchases of on-demand TV. The algorithms developed group clients based on their preferences, potential growth rate, and income and are presented on radar charts.
Software Development, Testing & BI Reporting – Automotive Software Projects
I developed and tested functional components of automotive software, including unit, integration, and custom tool-based testing. I led automation for software deployment (SPL) and documentation generation (Doxygen) across multiple repositories. I also designed and implemented GitHub Actions for automated testing, deployment, packaging, and CI/CD pipelines, while maintaining Git repository management and supporting PR reviews.
I delivered data insights using Tableau and Power BI with Python-based ETL and data mining. Using Python, C++, C, scripting languages, YAML, and Linux, I supported development and testing pipelines and initiated Android and REST API integration efforts. Partnering with remote, cross-timezone teams, I resolved complex Bazel build issues. I demonstrated adaptability by quickly learning unfamiliar technologies to enhance cross-repository support and developer productivity.
Core skills: Python, C++, C, GitHub Actions, YAML, Linux, Tableau, Power BI, data mining, ETL, Doxygen, SPL, Bazel, Android, REST API, automation, testing (manual and automated), agile collaboration.
I delivered data insights using Tableau and Power BI with Python-based ETL and data mining. Using Python, C++, C, scripting languages, YAML, and Linux, I supported development and testing pipelines and initiated Android and REST API integration efforts. Partnering with remote, cross-timezone teams, I resolved complex Bazel build issues. I demonstrated adaptability by quickly learning unfamiliar technologies to enhance cross-repository support and developer productivity.
Core skills: Python, C++, C, GitHub Actions, YAML, Linux, Tableau, Power BI, data mining, ETL, Doxygen, SPL, Bazel, Android, REST API, automation, testing (manual and automated), agile collaboration.
Education
2002 - 2007
Master's Degree in Automatics and Robotics
Gdańsk University of Technology - Gdańsk, Poland
Certifications
NOVEMBER 2017 - PRESENT
Six Sigma: Green Belt
Lean Six Sigma
NOVEMBER 2016 - PRESENT
AgilePM Foundation
APMG International
Skills
Libraries/APIs
Tableau API, REST APIs
Tools
Tableau Desktop Pro, Tableau, Microsoft Power BI, Microsoft Excel, Tableau Desktop, Google Sheets, Microsoft Word, Microsoft PowerPoint, Git, Excel 2016, MATLAB, Visual Studio, Perforce, Jira, Bazel, Looker, Apache Iceberg
Languages
SQL, Transact-SQL (T-SQL), C#, Excel VBA, Visual Basic for Applications (VBA), HTML5, C++, HTML, CSS, PHP, JavaScript, Python, R, Snowflake, C, YAML, Java
Paradigms
Business Intelligence (BI), ETL, Agile, Automation, UI Design, Agile Project Management, Six Sigma, Scrum, Waterfall Development, Testing
Storage
Relational Databases, Data Integration, Databases, Data Lakes, MySQL, PostgreSQL, Database Architecture, Microsoft SQL Server, JSON, Database Administration (DBA), Data Pipelines, Greenplum, SQL Server DBA, Redshift
Platforms
Windows, Oracle, Amazon Web Services (AWS), SharePoint, Linux, AWS Lambda
Frameworks
Windows Presentation Foundation (WPF), .NET
Other
Data Visualization, Dashboards, Data Engineering, Tableau Server, Data Analysis, Data Analytics, Dashboard Development, Data Modeling, Dashboard Design, Data Reporting, Data Structures, CSV, Reporting, Reports, Data Governance, Excel Macros, Trend Analysis, Key Performance Indicators (KPIs), ELT, Enterprise, Medallion Architecture, Optimization, APIs, Data Science, Data Warehousing, Business Analysis, Data Warehouse Design, ETL Tools, Web Dashboards, Excel 365, Data Architecture, Business, Data Build Tool (dbt), Computer Science, Robotics, Programming, Algorithms, PLC, Lean Project Management, Microsoft Data Transformation Services (now SSIS), Google Data Studio, Proof of Concept (POC), GitHub Actions, Data Mining, Doxygen, Looker Studio, SQL Server, Identity & Access Management (IAM), Human-machine Interface (HMI), fuzzy-rule systems
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