Make Sense of Your Data with Expert Analysis
Hi, my name is Jacek and I develop tailored Power BI dashboards, analytics frameworks, and forecasting tools that reveal trends, clarify performance, and help teams make informed decisions. Whether you’re improving internal reporting, scaling operations, or preparing for investment, I build insight systems grounded in financial logic, customer behaviour, and real operational drivers.
📈 Power BI Dashboards & Insight Models
I design Power BI dashboards with clear data models, robust DAX logic, and intuitive layouts built for everyday use:
- FP&A dashboards combining P&L, cash flow, balance sheet, and forecasts.
- Customer analytics including churn, retention, cohorts, and LTV.
- Sales and revenue reporting with forecasting and what-if parameters.
- Marketing performance dashboards for CAC, ROAS, attribution, and channel performance.
- Profitability and cost allocation by product, region, or project.
- Inventory and yield analytics for utilisation and margin visibility.
- Multi-entity reporting with FX conversion and unified KPIs.
- Operational KPI dashboards for IT, finance, and process improvement.
🔍 Advanced Business Analytics
I develop analytical frameworks that uncover what drives performance and how outcomes evolve:
- Driver-based forecasting and scenario modelling.
- Customer lifecycle and revenue behaviour analysis.
- Cohort modelling, conversion tracking, and retention forecasting.
- IFRS-15 aligned revenue recognition logic.
- Variance and trend analysis for FP&A teams.
- Marketing and acquisition analytics (CAC, ROAS, attribution).
- Yield, inventory, and affiliate performance analysis.
- KPI frameworks aligned with your operating model.
⚙️ Data Modelling & ETL
To support reliable reporting, I deliver the essential technical foundations:
- Power Query transformation.
- SQL-based joining, cleansing, and shaping.
- Python workflows for data standardisation.
- Multi-source data modelling.
- Validation and reconciliation logic.
🛠️ How I Work
- Free consultation to understand your business, metrics, and data.
- Proposal outlining the analytical framework and data model.
- Development of dashboards, metrics, and forecasting components.
- Walkthrough and training to help you maintain or extend the solution.
- Ongoing support for improvements and updates.
👥 Who I Work With
- Founders and CFOs needing clear, strategic reporting.
- FP&A teams improving planning and forecasting.
- Telecom, real estate, energy, media, and digital organisations.
- Marketing teams seeking transparent performance analytics.
- Operations and IT teams building KPI frameworks.
- Investors and finance directors requiring structured insights.
- Businesses without internal BI resources looking for expert support.
📈 Examples of Work
- Telecom Infrastructure – Investor & Performance Analytics
Supported senior leadership with scenario modelling, key driver analysis, and KPI frameworks used for equity raises, debt financing, and strategic plans. - Real Estate – Portfolio Forecasting & FP&A Support
Developed long-term revenue and cost projections, improved cash flow forecasting processes, and worked with a private equity investor to refine internal financial logic. - Media & Advertising – Multi-Entity Data Consolidation & Yield Analysis
Consolidated subsidiary datasets, unified KPIs, built validation workflows, and analysed inventory and affiliate yield across large datasets. - Training & Skills – Customer Behaviour & Revenue Recognition Analytics
Built cohort, churn, and conversion models; delivered IFRS-15 compliant revenue recognition logic; and supported internal/external auditors. - Global Marketing Network – BI & Data Standardisation
Introduced Python-based ETL workflows, developed ML name-matching tools, and improved visibility of financial performance across business units. - Technology & Operations – KPI Engineering & Performance Tracking
Developed operational KPI frameworks, wrote Python and SQL scripts for IT metrics, and structured datasets for consistent reporting. - Finance Directors & Founders – Decision Models & Analytical Support
Delivered analytical structures, improved monthly reporting frameworks, and provided ongoing insight support. - Automated Insight Tools – Python Applications & Pipelines
Built automated workflows to standardise data inputs and reduce turnaround time for recurring analysis.
Get in Touch
📌 Featured Power BI Tutorials
Here are some of my hands-on tutorials that walk through building Power BI dashboards and models step by step:
- Financial Planning & Analysis Dashboard – Build an integrated FP&A dashboard combining P&L, cash flow, balance sheet, and forecasting logic.
- Customer Churn & Revenue Forecast – Model customer cohorts, churn patterns, retention trends, and long-term revenue forecasts.
- Sales Analysis & Forecasting Dashboard – Create sales performance reporting with trend analysis, funnel insights, and interactive what-if forecasting.
- Consolidated P&L & Forecast Model – Merge multiple entities with FX conversion, unified KPIs, and consolidated forecasting.
- Yield Management & Inventory Analysis – Analyse inventory performance, yield metrics, variance drivers, and forecasting parameters.
Why Choose ChallengeJP?
- Over 10 Years of Experience — With over 10 years of experience in Commercial Finance and Data Analysis, I have helped businesses in many different industries to make sense of their data.
- Take Control of Your Data — Whether you use my consultancy services or Excel training courses, you’ll be in control of the process and the result — you can decide what you want to learn yourself, and which aspects of data analysis you’d like me to take care of for you.
- Personalised One-to-One Solutions — I offer personalised solutions to help you master spreadsheets and maximise data value. My courses are held on a one-to-one basis so I can tailor them to your skills and pace of learning. I also tailor my consultancy services to your business needs and desired results.
- Hands-On Learning Experience — Listening, watching and taking notes can only get you so far. So ChallengeJP courses give you the chance to apply lessons to practical examples. With hands-on learning experience, you’ll develop confidence using and creating spreadsheets.
- Competitive Pricing — All of the ChallengeJP services are competitively priced so you can get the help you need without breaking the bank. Whether you use my Excel courses and training to develop your skills, or you bring me on board to help with a business project, I will always offer you fair and competitive prices.