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NikitaBoyarkin/README.md

Nikita Boyarkin — Data / Product Analyst. Ambiguous product questions turned into clean experiments, SQL pipelines, and decisions.

📦 Portfolio: Portfolio
🔗 Links: Links

📚 Currently

  • 📚 Learning: Bayesian A/B testing, ClickHouse, dbt, Apache Airflow, Apache Superset
  • 💼 Open to: BI / product / data analyst roles — actively interviewing
  • 🤝 Collab: experimentation, user retention analytics
  • 🚧 Building: interactive analyst portfolio — playable SVG games + self-hosted GitHub stats

🗂️ All Projects

Portfolio overview: 27 projects across 4 tracks plus 23 Volta Neobank case studies

27 projects across 4 tracks · 23 Volta case studies

1. A/B Testing Methodology Toolkit — Experiments

Repo Stars Case study

Stack: Python NumPy / SciPy pytest uv

2. Browser Mini-Games — Analytics Arcade — Experiments

Repo Stars Case study

Stack: SVG JavaScript Astro Playwright

3. Causal / Uplift — CUPED and Individual Treatment Effects — Experiments

Repo Stars Case study

Stack: Python LightGBM scikit-learn pandas / NumPy

4. CRM Experiment Lab — Segment-Stage Randomization, GCG and Net Effect — Experiments

Repo Stars Case study

Stack: Python pandas / NumPy SciPy statsmodels

5. Data Analyst Telegram Bot — Experiments

Case study · private

Stack: Python aiogram pandas SciPy / statsmodels

6. Volta Neobank — Product Analytics — Experiments

Repo Stars Case study

Stack: Python pandas / NumPy SciPy / Statsmodels scikit-learn

7. Churn Prediction — Leakage-Free Retention Model — Analytics

Repo Stars Case study

Stack: Python LightGBM scikit-learn pandas / NumPy

8. Cohort Analysis Dashboard — Analytics

Repo Stars Case study

Stack: Python pandas matplotlib / seaborn Jupyter Notebook

9. Delivery Control Tower — Analytics

Case study

Stack: python sql duckdb superset

10. GMV Drop RCA — root cause on real data — Analytics

Case study

Stack: Python pandas DuckDB Plotly

11. LinkedIn Content Analytics — Analytics

Case study · private

Stack: Python openpyxl uv bootstrap

12. ML Fundamentals — scikit-learn Pipeline — Analytics

Repo Stars Case study

Stack: Python scikit-learn pandas matplotlib

13. Product A/B & Funnel Analytics — Conversion versus Retention — Analytics

Repo Stars Case study

Stack: Python pandas / NumPy DuckDB SciPy

14. Promo Margin Lab — what a promo rouble actually earns — Analytics

Repo Stars Case study

Stack: Python pandas scikit-learn PySpark

15. Python Analytics Playground — Analytics

Repo Stars Case study

Stack: Python pandas / NumPy Matplotlib pytest

16. RAG Evaluation Harness — retrieval and generation metrics — Analytics

Repo Stars Case study

Stack: Python scikit-learn pandas / NumPy TF-IDF

17. RFM Analysis of Bank Clients — Analytics

Repo Stars Case study

Stack: Python SQL Tableau

18. Sales Calls Analytics Dashboard — Analytics

Repo Stars Case study

Stack: Python Streamlit pandas

19. SERP Rank Lab — Analytics

Repo Stars Case study

Stack: Python DuckDB Streamlit NumPy / SciPy

20. SQL Analytics Case Study — Analytics

Repo Stars Case study

Stack: SQL dbt DuckDB Python

21. Product Analytics + A/B on Supabase — Product

Repo Stars Case study

Stack: Python Streamlit Supabase SQL

22. Product Analytics Dashboard (Streamlit) — Product

Case study · private

Stack: Python Streamlit pandas / NumPy

23. TaskFlow — PostHog Product Analytics Pipeline — Product

Case study · private

Stack: Python PostHog FastAPI Streamlit

24. Airflow DAG Platform — Engineering

Repo Stars Case study

Stack: Python Apache Airflow 3 PostgreSQL Docker Compose

25. Digital Garden — EQ in IT — Engineering

Repo Stars Case study

Stack: TypeScript Quartz v4 Markdown Obsidian

26. Scrolly English Speaking — Engineering

Repo Stars Case study

Stack: Astro TypeScript MDX D3

27. This Portfolio Site — Engineering

Repo Stars Case study

Stack: Astro TypeScript Markdown CSS custom properties

🏦 Volta Neobank — 23 case studies
  1. Volta — Funnel Analysis · Repo · Case study
  2. Volta — KYC Progress-Bar A/B Test · Repo · Case study
  3. Volta — Retention & Cohorts · Repo · Case study
  4. Volta — User Segmentation · Repo · Case study
  5. Volta — Churn Prediction · Repo · Case study
  6. Volta — RFM Analysis · Repo · Case study
  7. Volta — CLV Modeling · Repo · Case study
  8. Volta — Marketing Attribution · Repo · Case study
  9. Volta — Anomaly Detection · Repo · Case study
  10. Volta — Spend Analysis · Repo · Case study
  11. Volta — Support & Churn · Repo · Case study
  12. Volta — NPS Trends · Repo · Case study
  13. Volta — JTBD × Cohorts · Repo · Case study
  14. Volta — Traveler Unit Economics · Repo · Case study
  15. Volta — Premium Upsell · Repo · Case study
  16. Volta — 45+ KYC Deep-Dive · Repo · Case study
  17. Volta — Referral Segments · Repo · Case study
  18. Volta — Assisted CAC vs LTV · Repo · Case study
  19. Volta — FX Sourcing Feasibility · Repo · Case study
  20. Volta — Segment Premium Offers · Repo · Case study
  21. Volta — Anchor Launch CAC at Scale · Repo · Case study
  22. Volta — Dormant 45+ Win-back · Repo · Case study
  23. Volta — Causal Validation of KYC (DiD) · Repo · Case study

⚡ Activity

Last refreshed: 2026-10-27 09:51 UTC · 273 contributions in the last 7 days

📊 Stats, streaks, contribution map, languages and monthly trend

NikitaBoyarkin GitHub Stats

Top Languages

GitHub contribution map

Monthly contributions

Contribution types

NikitaBoyarkin 30-day activity graph

Contribution snake

Profile views

📝 Recent Notes

Auto-updated daily from the site RSS via GitHub Actions.

🛠️ Tech Stack

Core stack

Languages

Python SQL TypeScript JavaScript

Data & Machine Learning

Pandas NumPy SciPy Statsmodels scikit-learn LightGBM PySpark Matplotlib Seaborn Plotly Jupyter openpyxl

Storage & Pipelines

PostgreSQL SQLite DuckDB Supabase dbt Apache Airflow

BI & Product Analytics

Tableau Streamlit Apache Superset PostHog

Shipping & Quality

uv pytest Docker GitHub Actions FastAPI aiogram Playwright

Web & Publishing

Astro D3 Quartz Obsidian

Exploring next: ClickHouse · Bayesian A/B testing · real-time pipelines — every other badge above ships in one of the 27 projects.

🌐 Connect

LinkedIn Portfolio Blog Telegram Email

🧩 How this profile is built — situation, task, actions, result

Situation. The work lived across many repositories — experiments, SQL, retention, segmentation — each with its own numbers and no single reachable page tying a method to the result it produced.

Task. Turn that body of work into a profile a recruiter can navigate in one scroll: headline cases with real numbers, a public case study per project, and a portfolio site that demonstrates the analytics rather than describing it.

Actions. Published the work end-to-end. Projects are grouped into Experiments / Analytics / Product / Engineering, the Volta flagship carries 23 linked sub-cases, and the portfolio site at https://nikitaboyarkin.github.io renders every case study. In the site, headline numbers are frozen in src/lib/metrics.ts and CI-checked; profile cards, stats and the SVG games are self-hosted via scripts/build_profile.py.

Result. A public portfolio site plus a self-hosted profile: 8 playable SVG mini-games, the Volta flagship at +5.72 pp KYC conversion and €208.5K over 12 months, and an analytics evidence map linking each method to the repository that produced it.

Profile cards (stats, activity, contribution map, contribution types, monthly activity, top languages) are self-hosted via scripts/build_profile.py. Powered by snk, blog-post-workflow, skill-icons, shields.io, and jsDelivr.

Pinned Loading

  1. NikitaBoyarkin.github.io NikitaBoyarkin.github.io Public

    Bilingual RU/EN portfolio of a product and data analyst: 22 cases as an Astro static site, each headline metric frozen and drift-checked.

    HTML 5

  2. volta-banking volta-banking Public

    End-to-End Product Analytics Pipeline

    Python 4

  3. rfm-analysis-of-bank-clients rfm-analysis-of-bank-clients Public

    Segment bank clients by transaction behavior using Recency, Frequency, Monetary scoring

    HTML 11 1

  4. sql-analytics-case-study sql-analytics-case-study Public

    25 DuckDB SQL cases plus one real-data case (UCI Online Retail II): funnel, cohort retention, RFM, LTV and an A/B z-test written in pure SQL.

    Python 3

  5. ab_test ab_test Public

    Calibration-driven A/B testing toolkit: SRM, CUPED/CUPAC, delta-method ratio metrics, sequential and Bayesian methods, each validated by tests.

    Python 4

  6. tableau_cohort_analysis tableau_cohort_analysis Public

    Tableau-ready cohort retention and LTV pipeline on seeded synthetic data: 39 tests, CSV + .hyper export

    Jupyter Notebook 5