Hello, I'm

Kateřina Volfová

Developer & Analyst

Specialising in Python development, data engineering, and AI/ML

About Me

I'm a developer and analyst based in Prague with a strong focus on Python development, data engineering, and AI/ML. I enjoy building data-oriented services, automating processes, and figuring out tricky technical problems.

I care deeply about the products I work on and love working closely with product owners. I always want the user experience to be as smooth as possible.

Currently working at SAP Concur on serverless ETL pipelines in AWS, while also freelancing as a Python programming lecturer. Over the years, I've done everything from web scraping and big data engineering to test management and teaching programming.

Outside of work, I'm an avid reader, and I enjoy music, computer gaming, and automating things just for fun.

10+ Years in Tech
C1 English

Skills & Technologies

Programming

Python Django Flask Bash HTML/CSS JavaScript React.js GNU/Linux: Fedora, Alpine

Data & Cloud & Infrastructure

SQL (PostgreSQL) Pandas Matplotlib Plotly AWS AWS Lambda S3 DynamoDB SQS ElasticSearch CloudFormation Terraform CI/CD Git/GitHub Docker/Podman

Testing

Test Automation Test Analysis Test Management Selenium RobotFramework pytest API Testing Postman

AI & Data Science

ML/AI Statistics Spark Hive HDFS Jupyter

Work Experience

August 2022 — Present

SAP Concur

Software Developer

Development of data-oriented services (ETL processes) within a serverless architecture in Python. Using lambdas, SQS and other serverless tools provided by AWS. Replicating data to ElasticSearch, querying ES and working with DynamoDB. Analysing data and problem solving. Development of internal Python packages and testing of our solutions.

Python AWS ElasticSearch DynamoDB CloudFormation
November 2021 — Present

Freelancer

Python Developer

Development of a custom UI testing tool based on Python, pytest, Selenium, dockerisation of the solution, and a web app for displaying test results. Small ad hoc projects in Django.

Python pytest Docker Selenium Django
June 2020 — January 2022

Doctors Without Borders — Shared IT Services Prague

Developer / IT Analyst

Maintenance of data warehouse residing in PostgreSQL database. Optimising transformation scripts and preparing data for Power BI. Migrating part of DWH into Azure Synapse Analytics. Enhancement of test tool written in Python — speeding up tests and running them in parallel using Docker.

Python PostgreSQL Docker Selenium Bash
January 2019 — May 2020

LeadsPicker (Web Project s.r.o.)

Web Scraper Developer

Development of web scrapers using Python and the Scrapy framework.

Python Scrapy
September 2018 — June 2019

MakeITtoday

Tutor of Programming for Children

Tutoring fun programming courses for children, preparing syllabi and games to engage them more in programming.

Python Scratch HTML/CSS
December 2017 — July 2018

T-Mobile CZ/DE

Big Data Engineer

Working with the Cloudera stack (HDFS, Hive/Impala, Spark). Writing unit tests in Python for HQL transformation scripts. Analysing input data and transforming scripts from SAS to Hive. Using Jupyter notebooks and Pandas for data analysis.

Python Hive Spark Pandas HDFS
January 2016 — August 2017

E-Commerce Holding / MallGroup

Test Manager & Web Applications Tester

Leading a small team of five testers, preparing test plans, time management and reporting. Creating a new vision of testing in the context of CI/CD and agile. Test case design, manual testing and test automation in Python and PHP.

Python SQL Jira Postman

Education & Certifications

Education

Podkrušnohorské Gymnázium Most

Grammar School, 2011

Certificates

ISTQB Foundation Level

April 2017

FCE — First Certificate in English (B2)

January 2011

Courses

AI Developer

Robot Dreams, December 2024 — 400/400 points

Mastering Machine Learning in Python

Robot Dreams, December 2024 — 151/140 points

ElasticSearch Deep Dive

A Cloud Guru, August 2022

AWS Certified Solutions Architect — Associate (SAA-C03)

A Cloud Guru, July 2022

Bertelsmann Data Science Challenge Scholarship

Udacity, May 2018

Multiple Coursera Courses

University of Michigan, Rice University, Johns Hopkins — Python, R, Data Science, Genomics (2015–2016)

Languages

English (C1)

French (A2)

Czech (native)

Beyond Code

Reading

Mostly fiction, fantasy, and sci-fi with a soft spot for Japanese and Korean literature

Music

Listening, discovering new sounds and from time to time hitting some piano keys

Gaming

Computer gaming as a way to unwind with real-time strategies, Dota 2, and cosy games

Automating

Programming and automating stuff for fun and vibing with Claude