Systems, Data, and the Practice of Statistical Thinking

ISO 27001 and Multi-Tenant SaaS

Security

Architecture

App

Strategy

This article examines the two dominant approaches to multi-tenant data isolation, maps them against ISO 27001 Annex A controls, and makes the case for isolation enforced by infrastructure rather than policy.

May 24, 2026

Aleksei Prishchepo

Transit Accessibility Maps in R

H3 Clustering, Routing APIs, and IDW Isolines

Geospatial

Data Engineering

Practitioner walkthrough of building a transit accessibility pipeline in R — covering H3 hexagonal clustering, resilient routing calculation loops, and IDW isoline generation over an OSM base tile.

May 18, 2026

Aleksei Prishchepo

My German Website Is Live

News

Meet frequentist.de — a German-language professional site covering my BI and analytics services for companies in the DACH region.

Apr 23, 2026

Aleksei Prishchepo

Practical Concepts for AI Driven Sales Coaching

Sales

Strategy

Breaking away from the ‘one-size-fits-all’ sales coaching approach, here are four transformative ideas inspired by the AI revolution to overcome the scalability challenge in sales enablement.

Mar 23, 2026

Aleksei Prishchepo

Implementing a Neural Network in Base R

Animation

This small project implements a fully connected neural network using only matrix operations, a logistic activation function, and manually derived gradients. There is no…

Feb 14, 2026

Aleksei Prishchepo

Using Transit Time to Rethink Hotel Search

Product

Marketing

Spatial

Geospatial

Strategy

Price competition in hotel search has largely saturated, especially for leisure travel. As a result, platforms increasingly differentiate by helping users make better…

Feb 7, 2026

Aleksei Prishchepo

The 7-Step KPI Blueprint from Business Intelligence Analytics Perspective

KPI Design

Strategy

A 7-step process of building governed, scalable KPI frameworks using XmR charts, semantic modeling, and variance analysis.

Jan 28, 2026

Aleksei Prishchepo

Building a Privacy-First LinkedIn Analytics Platform

App

Visualization

NLP

Python

Developing a tool that turns LinkedIn™ data export into a clear, visual overview of professional relationships, helping users see who they’re connected with, identify meaningful clusters, prioritize important contacts, clean up outdated connections, and discover new people worth engaging with.

Dec 27, 2025

Aleksei Prishchepo

Agentic vs Deterministic Workflows: Designing a Reliable AI Application

Agents

LLM

App

Python

A case study on designing an AI-assisted workflow, discussing agentic autonomy and deterministic control through architectural decisions and production constraints.

Dec 13, 2025

Aleksei Prishchepo

Building an E-Commerce Dashboard with Power BI and R

Statistics

Visualization

An overview of the process of building an E-Commerce dashboard using Power BI and R, covering exploratory data analysis, time series forecasting, and causal modelling.

Nov 26, 2025

Aleksei Prishchepo

Propensity Score Matching for Causal Analysis

A/B Testing

Statistics

A hands-on guide to implementing propensity score matching in R for causal inference in A/B testing scenarios using marketing data.

Oct 31, 2025

Aleksei Prishchepo

Building the Analytical Dashboard with Power BI and R

Statistics

Visualization

An overview of the process of building an analytical dashboard using Power BI and R, focusing on data preparation, time series forecasting, and causal analysis.

Oct 26, 2025

Aleksei Prishchepo

Building a Credit Risk Dashboard with Power BI and R

Statistics

Visualization

A detailed walkthrough of creating a financial risk dashboard using Power BI and R, covering data cleaning, model building, and integration.

Sep 27, 2025

Aleksei Prishchepo

Time-Series Clustering with R’s dtwclust Package

Time-Series

Clustering

This article is a practical guide for time-series clustering using the dtwclust package. The dtwclust package in R (see vignette) provides a powerful and flexible framework…

Aug 27, 2025

Aleksei Prishchepo

Minimum Detectable Effect (MDE) Calculation

A/B Testing

Product

Statistics

Minimum Detectable Effect (MDE) is defined as the smallest difference between a control and a test group that your A/B test can reliably identify as statistically…

Aug 7, 2025

Aleksei Prishchepo

A/B Testing: Concepts and Techniques

A/B Testing

Product

Statistics

Key components, metrics, errors, CUPED, multiple testing, peeking, and Bayesian vs frequentist approaches.

Jul 29, 2025

Aleksei Prishchepo

Animation of Spatial Data

Visualization

Spatial

Animation

Creating an animated visualization of spatial data using R

Jul 4, 2025

Aleksei Prishchepo

Product Cards Creation Application

App

LLM

Python

This application is designed to create product cards for an online store. It utilizes a large language model (LLM) and programming libraries to generate detailed…

May 31, 2025

Aleksei Prishchepo

Creating Anki Flashcards From List of Words

NLP

Python

This notebook demonstrates how to create Anki flashcards from a list of words. The example uses a list of German words related to “Die Stadt” (The City) and translates them…

May 3, 2025

Aleksei

Implementing a Local Retrieval-Augmented Generation System

RAG

NLP

LLM

Python

RAG (Retrieval-Augmented Generation) is a technology that combines the search external sources and generation using large language models. It allows for more accurate and…

Mar 21, 2025

Aleksei

Nerdy Valentine’s in Python, R, and Matlab

Python

Matlab

Let’s celebrate Valentine’s Day with some nerdy love! In this post, we will create heart-shaped plots using Python, R, and Matlab. These heart-shaped plots are a fun and…

Feb 14, 2025

Aleksei

Run Docker Containers Remotely with Airflow

Airflow

Docker

Airflow is a powerful tool for automating workflows. Once you start using it, you’ll likely find it a great replacement for cron jobs on Linux machines. One common use case…

Jan 8, 2025

Aleksei

BI System Blueprint

ETL

In this post, I’d like to present a blueprint for a BI system that I’ve been working on. The system is designed to provide insights into the company’s performance and…

Jan 6, 2025

Aleksei

CV Week 2024

CompVis

In November 2024, the Yandex School of Data Analysis (YSDA) and Yandex conducted an open online intensive course on computer vision, focusing on generative diffusion models…

Dec 18, 2024

Aleksei

Using Airflow FileSensor for Triggering ETL Process

ETL

Airflow

In this article, we will discuss how to use the Airflow FileSensor to trigger an ETL process. We will walk through the process of setting up a FileSensor in Airflow and…

Nov 5, 2024

Aleksei

European Tech Salaries

Money

Recently, I stumbled upon a Reddit post where someone was gathering salary data from the tech sector throughout Europe. It piqued my interest to explore how these salaries…

Sep 27, 2024

Aleksei

Python Library for Russian Macroeconomics Data

Time-Series

Macroeconomics

Python

The article introduces a Python library called sophisthse that provides access to Russian macroeconomic statistics time series published by the National Research University…

Aug 22, 2024

Aleksei

Kano Model for Prioritization of Features

Marketing

Product

Python

A practical guide to the Kano model for feature prioritization covering the five quality categories, survey design, satisfaction scoring formulas, and a full Python implementation on a fintech dataset.

Aug 5, 2024

Aleksei