Jonny Mills
Data Engineer at Trainline
- Role
- Data Engineer at Trainline
- Location
- New York, NY, US
- LinkedIn followers
- 500 followers
About Jonny Mills
Data engineer specializing in analytics and platform engineering with 5+ years of experience across health tech, travel, real estate, and sports tech, including 4+ years at San Francisco–based companies. Currently at Trainline, Europe’s #1 downloaded rail app. Enthusiastic volunteer in AI and tech education to empower the next generation. Skilled in building scalable ETL pipelines, automating workflows, and developing data solutions using Python, SQL, DBT, Airflow, Docker, Snowflake, Dagster, and more. Constantly building my AI tool repertoire.Open to chat about roles including data engineering, solutions engineering, and edtech. Or ask me about my intuitive piano method and pickleball coaching!Languages & Libraries:Python (pandas, PySpark, NumPy, scikit-learn), SQL, Ruby (Rails), R, Scala, STATAData Engineering & Infrastructure:Airflow, DBT, Dagster, ETL, Snowflake, PostgreSQL, Spark, Jenkins, Kubernetes, Docker, Git, AWS (EC2, S3, VPC, IAM), OOPData Science & BI:Machine learning, Tableau, Looker, Databricks, web scraping, automationAI & Emerging Tools:Claude, OpenAI, Perplexity, Gamma AI, Cursor, Repl.itInterests & Passions: Piano Performer & Teacher (IntuitivePiano.com)| Wild Swimmer | Pickleball & Table Tennis Player
Experience
Data Engineer
Jul 2025 — Present · London, GB
Analytics and platform data engineering in Python and SQL for Europe’s number 1 downloaded rail app (over 125 million monthly visits & £5.9 billion annual ticket sales), using AWS, Trino (Starburst), dbt, Spark, Jenkins, and Airflow.
Education
William & Mary – Raymond A. Mason School of Business
Master of Science - MS, Business Analytics (Data Science Focus)
2017 — 2018
Stanford Continuing Studies
Sports & AI Courses
2019 — 2019
William & Mary
Bachelor's degree, Economics
2013 — 2017
Brunswick School
High School Diploma
2009 — 2013
Skills
- Microsoft Excel
- Machine Learning
- Microsoft Powerpoint
- Matlab
- Teamwork
- Interpersonal Leadership
- Database Development
- Social Entrepreneurship
- Python
- Hadoop
- Fitness Training
- Global Business Development
- Leadership
- Tableau
- Web Scraping
- Data Mining
- Data Analysis
- Research
- Sql
- Microsoft Word
- Resiliency
- Microsoft Office
- Business Strategy
- R Programming
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