Power BI · SQL · Advanced Excel · Python · Financial Planning and Analysis
Turning financial data into clear insight that supports confident business decisions.
Chartered Accountant with over ten years of experience in financial analysis, forecasting, and reporting automation. I help organisations move from static reporting to insight driven decision making using Power BI, SQL, Python, and advanced financial modelling.
Open to Financial Data Analyst and Finance Systems roles in the United Kingdom. Hybrid and remote considered.
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About Me
I am Teslim Adeyanju, a Chartered Accountant, Xero Advisor Certified professional, and Financial Data Analyst with more than a decade of experience at the intersection of finance, accounting, and data analytics. My career began in core accounting and finance, where I prepared management accounts, built budgets and rolling forecasts, delivered variance analysis, and supported compliance under IFRS and UK GAAP.
Over time, I expanded into data analytics and machine learning, combining accounting discipline with modern analytical tools. Today, I help organisations go beyond reporting by uncovering performance drivers, explaining trends, and translating complex financial data into actionable business insight that supports planning and decision making.
I also serve as Treasurer on the Board of Trustees at Asylos, a United Kingdom based charity providing research to support asylum claims. In this role, I manage budgets, forecasts, and restricted funds, and design board level dashboards that strengthen transparency, accountability, and governance.
In short, I turn numbers into meaningful stories that inform strategy and drive results.
What I Do Best
I combine strong accounting foundations with data science, advanced Excel, SQL, and Power BI modelling to help organisations turn financial data into confident decisions.
Finance and Accounting for Decision Making
- Financial reporting under IFRS and UK GAAP including Statement of Financial Position, Statement of Profit or Loss, and Cash Flow
- Management accounts, budgeting, rolling forecasts, and reforecast cycles
- Variance analysis across revenue, cost, margin, cash flow, and working capital
- Liquidity management, financial risk analysis, and cash flow forecasting
- Scenario and sensitivity modelling to support planning and strategic decisions
- Restricted funds management and board level financial reporting
Data Analytics, Modelling, and Insight
- Financial analysis and predictive analytics using SQL, Python, R, and machine learning
- Power BI semantic modelling using star schema with clearly defined fact and dimension tables
- DAX measures, variables, and time intelligence for margin, YoY, and trend analysis
- Power BI performance optimisation using aggregations, cardinality reduction, and model tuning
- SQL data modelling and querying using advanced joins, views, stored procedures, and normalised schemas
- Advanced Excel financial modelling using Power Query, PivotTables, FORECAST.ETS, XLOOKUP, and dynamic formulas
- Reporting automation using Power Query, SQL pipelines, GitHub, Docker, and scheduled refreshes
- Interactive dashboards and executive reporting using Power BI and advanced Excel
Systems, Automation, and Governance
- Accounting and ERP systems including Xero, Sage 50, Business Central, and QuickBooks
- ERP to Power BI data integration and ETL processes ensuring reliable and consistent reporting
- SQL based data extraction and normalisation to maintain analytical integrity
- Month end close optimisation, audit readiness, and statutory reporting support
- Governance focused reporting with strong internal controls and risk oversight
Education and Professional Qualifications
- MSc Finance and Investment Banking with Advanced Research, Distinction, University of Hertfordshire, United Kingdom, Top five percent of cohort
- Chartered Accountant, Institute of Chartered Accountants of Nigeria
- Xero Advisor Certified
Tools & Technologies
Accounting and ERP Systems
- Xero, Sage 50, Business Central
- General ledger, month end close, reconciliations, payroll RTI, financial consolidation
Data Visualisation and Modelling
- Power BI, Advanced Excel
- DAX measures, Power Query, semantic models, financial dashboards, dynamic KPIs
Programming and Data Science
- Python, R, SQL, pandas, scikit learn, Jupyter, GitHub, Docker
- Data analysis, automation, machine learning workflows, feature engineering
Featured Portfolio Projects
Diamond Price Predictor
Developed an end to end machine learning pipeline to predict diamond prices and explain key price drivers. Applied regression and ensemble models with evaluation and feature analysis, and deployed the solution using Streamlit.
Explore the full Project on Github
Tech Giants Stock Analysis
Conducted SQL and Python based analysis of financial performance and market trends of leading technology firms, transforming raw financial data into clear investment insights.
Explore the full Project on Github
International Student Wellbeing Analytics
Built an advanced SQL portfolio project analysing wellbeing patterns across education and healthcare style datasets, using analytical queries to uncover trends and drivers.
Explore the full Project on Github
News Automator Real Time News Aggregator
Designed and built a real time news aggregation platform using Python and Streamlit, enabling intelligent search, automation, and personalised content delivery through API integration.
Explore the full Project on Github
Automating Podcasts into Actionable Lessons
I use automation to transform podcasts into a structured, searchable knowledge base that supports continuous learning and professional insight.
Using Snipd and Notion, transcripts and key highlights are automatically captured and organised across AI, finance, and data science. Relevant insights are then connected to forecasting, data strategy, and emerging technology, ensuring learning is retained and applied rather than lost.
Journals and Study Hub
This section captures reflections, study notes, and insights from my ongoing learning journey across finance, accounting, and data science.
My journals document not just what I learn, but how concepts connect to real world financial analysis, reporting, and decision making.
Project Collections
Browse my structured project collections across the following areas.
