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ARTUR MISTIUK
Stockholm, Sweden | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация»)
Portfolio Website | LinkedIn | GitHub
DATA ANALYST

SUMMARY
Data Analyst at Visa working on financial transaction data across 20+ international markets.
Focused on prompt engineering for AI labeling agents, blind evaluation of model output, and data
quality for ML training datasets. Software engineering background with strong Python, SQL, and
formal mathematics foundation.
WORK EXPERIENCE
Data Analyst | VISA (Consultant via Coody) | Oct 2024 - Present
Working on financial transaction data across 20+ international markets to support merchant
prediction and transaction categorization ML models.
Writing and iterating on prompts for AI labeling agents; running blind evaluations of model
vs. human labels and feeding error patterns back into prompt revisions.
Performing data quality assurance through dashboards and resolving inconsistencies to keep
training datasets reliable.
Using Python and BigQuery for data tasks and analysis, collaborating with ML engineers
Mentored a team of 7 data labelers — standups, onboarding materials, and workshops.

PROJECTS
Stockholm Job Market Analyzer Live Demo GitHub Repository
Built an end-to-end data pipeline and dashboard to track data job trends in Stockholm.
Ingested job postings from Platsbanken API and LinkedIn/Indeed, deduplicated records,
extracted skills using regex, and classified seniority levels.
Deployed the project on Fly.io with KPI cards, skill rankings, experience distribution, and
a skill co-occurrence heatmap.

EDUCATION
Bachelor’s Degree in Computer Science | Zaporizhzhia National University 2017 - 2021
Python Developer Course | GoIT Global 2022 - 2023
Data Analytics and ML | Nod Coding Bootcamp (Stockholm) 2024

SKILLS
Python Looker Studio BigQuery Prompt Engineering
SQL Power BI MongoDB Clustering
Pandas, Excel Docker EDA
NumPy Git scikit-learn Statistics
BigQuery
LANGUAGES
English — Fluent Swedish — Intermediate
Ukrainian — Native
Russian — Fluent Polish — Intermediate