Steven Calder
Verified Expert in Engineering
Data Visualization Developer
Steven is a versatile data scientist who connects concepts from various fields of thought to create novel solutions and identify new areas to apply data. His work emphasizes clear communication of technical concepts via interactive visualizations and narrative storytelling, allowing decision-makers from all backgrounds to understand and take appropriate actions.
Portfolio
Experience
Availability
Preferred Environment
Tableau, Looker, Python, Snowflake, PostgreSQL, Pandas, Python 3
The most amazing...
...use of data I've done was to combine data from various railway sensors to create predictive maintenance products, resulting in multiple patents along the way.
Work Experience
Senior Staff | Data Science and Analytics
Doximity
- Developed NLP models to extract features from medical literature and match the content with users.
- Led the dimensional modeling team in structuring company-wide data.
- Leveraged the company data to customize the product to achieve company goals.
Principal Data Scientist | Head of R&D Data Analytics Center
Siemens
- Recruited, hired, and led an international and multicultural team of 15 data experts, including some with their direct reports.
- Organized international teams in Japan, Singapore, Hong Kong, and Europe.
- Managed simultaneous project proposals, budgets, and timelines.
- Developed and maintained scalable ETL systems to ingest, process, and analyze streams of petabytes of data from diverse sources.
- Produced interactive data visualization products with real-time analytics for resource allocation, predictive maintenance, and improvements to odometric systems.
- Authored intellectual property applications and academic publications.
Head of Data Science
CrossEngage
- Recruited, hired, and led a team of ten data specialists.
- Designed an artificial intelligence technique for predicting and directing customer behavior.
- Invented new techniques for machine learning with imbalanced datasets—expansion of the SMOTE algorithm for online marketing.
- Presented our data products to clients and investors.
Data Scientist
Rocket Internet
- Consulted portfolio companies—HelloFresh, Zalando, Carmudi—to identify new opportunities to utilize their data.
- Oversaw the construction of scalable ETL pipelines to plan for growth.
- Created price prediction models for the global used vehicle market.
- Worked with product owners to determine KPIs with automated reporting.
- Segmented customers for marketing and churn prediction.
Postdoctoral Researcher
Wageningen University & Research
- Supervised a team of six graduate students and managed international projects with teams from Japan, Egypt, Israel, Canada, the USA, and Europe.
- Applied machine learning to chemical systems to produce biochemical sensors.
- Acquired and analyzed the data from "artificial noses" as a diagnostic instrument.
- Authored research articles in top journals and reviewed articles as a peer reviewer.
Experience
Rail Vehicle Anomalies
https://tabsoft.co/2My67LpA dashboard presenting the findings is available on the website above.
Skills
Languages
Python, SQL, Snowflake, Python 3, R
Libraries/APIs
Pandas, NumPy, Scikit-learn, Natural Language Toolkit (NLTK), PyTorch, TensorFlow, Dask, SciPy, Luigi
Tools
Tableau, Looker, Amazon SageMaker, Apache Airflow, Spreadsheets, Microsoft Excel, PyCharm, pgAdmin, MATLAB, Jupyter, GIS
Paradigms
Data Science, Business Intelligence (BI), ETL, Dimensional Modeling, Automation
Storage
PostgreSQL, Data Pipelines, Redshift, Cassandra
Other
Data Analytics, Data Visualization, BERT, Natural Language Processing (NLP), Machine Learning, Predictive Modeling, A/B Testing, Big Data, Word2Vec, Data Modeling, GPT, Generative Pre-trained Transformers (GPT), Data Engineering, Time Series Analysis, Torch, Time Series, Deep Learning, Tableau Server, APIs, Clustering, Neural Networks, Large Language Models (LLMs), Artificial Intelligence (AI), Funnel Analysis, Customer Retention, Data Analysis, People Management, Algorithmic Trading
Platforms
Amazon Web Services (AWS)
Industry Expertise
Project Management
Frameworks
Spark
Education
Ph.D. in Chemical Physics
University of Minnesota - Minneapolis, MN
Master's Degree in Chemistry
University of Minnesota - Minneapolis, MN
Bachelor's Degree in Chemical Physics
College of William and Mary - Williamsburg, VA
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