Oleksii Podpriatov

Oleksii Podpriatov

Power BI & data engineeringContract Bratislava, CETRemote

I build reporting that stays right when the sources change — Power BI models, Power Query and SQL pipelines, and the checks that catch a number that has quietly stopped adding up.

Reporting platform at Swiss Reenergy data at the Slovak Academy of Sciences

Available now for contract work — full-time or part-time, remote. Month to month, invoiced monthly. Prefer to see the work first? We start with one paid trial task — a week or two, price agreed upfront — and continue month to month if it works.

Email me Download CV (PDF)
16×faster reports at the Slovak Academy of Sciences — 21 min 40 s down to about 80 s
21Power BI reports on one model with 8 fact tables, built at Swiss Re
+61 ptsfield completeness in six months at Swiss Re — nobody was chased to fill it in
97%of 122,370 order lines matched after one key fix that two systems disagreed on

Selected work

Problems I have already solved

Swiss Re · 2026

One reporting platform instead of separate exports

Events, requests and tasks from regional lists and exports, brought into one Power BI model that is always on the latest data.

Power BIDAXPower QuerySharePoint How it was built → Swiss Re · 2026

Reports that survive the export changing shape

Automatic file pickup and header detection, so a changed export no longer means a rebuild — and totals stop double-counting.

Power Query (M)Power AutomateSharePoint How it works → Swiss Re · 2026

A data quality score that stopped flattering the data

Completeness per field and per owner, with placeholders counted as missing. One field went from 25% to 86% in six months.

Data qualityPower BIDAX What changed → Slovak Academy of Sciences · 2024–2025

From Excel exports to Power BI — 16× faster

Millions of sensor readings a quarter. Three months of data now load in about 80 seconds instead of 21 minutes.

Power BISQLMariaDBDAX Before and after → Open source · public data · 2026

Orders and stock reconciled between two systems

A Python tool that matches two exports. On public data it found paid orders that never shipped — and a shoe size written as 105 in one system and 10.5 in the other.

PythonpandasOpen source What it found → Slovak Academy of Sciences · 2025– · in progress

A data platform for an energy lab

TimescaleDB, a Python watchdog on every data stream, anomaly detection with machine learning, and faster Power BI reporting.

TimescaleDBPythonMLin progress The plan and the aim →

Reference

From the team I built it for

Letter of recommendation from the Slovak Academy of Sciences, July 2025, about the energy hub project. Translated from Slovak.

Read the full letter →

“He built a working system that helps users process large amounts of data efficiently. […] I am convinced that the candidate will be an asset to your company too, and will very quickly learn the work required of him.”

Ing. János Kurcz · Institute of Materials and Machine Mechanics, Slovak Academy of Sciences

How I work

What working with me looks like

Most of my work is the unglamorous half of business intelligence: getting data out of systems that were never meant to hand it over cleanly, and keeping it right after the source changes.

  • Remote from Bratislava (CET) — a full overlap with UK and EU hours, and US mornings.
  • Month to month, no minimum term, invoiced monthly. Defined pieces of work at a fixed price.
  • A short written update every week — what is done, what is next, what is blocked.
  • Your data stays in your environment wherever possible. NDA before any data moves.
  • Everything documented and handed over — files, models, notes. Nothing stops working if we stop.

For BI and Microsoft consultancies

One more Power BI pair of hands for your client projects

When a project needs an extra person for a few weeks or months, I join your team as a subcontractor — your client sees your team, not a stranger.

  • Under your brand and standards — your templates, naming conventions and review process.
  • In your environment — your tenant, accounts and tools; client data stays in your systems.
  • Ready for client work — documented, handed over, comfortable on client calls in English.
  • B2B contract, invoiced from Slovakia (EU). Day rate on request.
  • Available now, full-time or part-time, with a full overlap with UK hours.

Short of a Power BI person on a project? Tell me the stack and the dates — two lines are enough.

Email me

Experience

  • 2026 — now Operations reporting platform · Swiss Re, Bratislava
    Power BI on one dimensional model; data quality and governance.
  • 2025 — now Energy lab data platform · Slovak Academy of Sciences
    TimescaleDB, Python, anomaly detection — in progress.
  • 2024 — 2025 Energy hub reporting · Slovak Academy of Sciences
    Solar energy production in Power BI, 16× faster; EU NextGenerationEU project.

Tools

Power BIDAXPower Query (M)SQL SQL ServerMariaDBTimescaleDBPython pandasExcelPower AutomateSharePoint Power BI ServiceDimensional modelling (star schema)Data quality

Education

MSc Computer Science — Slovak University of Technology, Bratislava (expected 2027)
BSc Computer Science — Slovak University of Technology, 2025

Languages

English — professional · Slovak — fluent · Ukrainian — native