Hi, I'm Dennis!
Detail-oriented data scientist with a strong foundation in statistical modeling, machine learning, and data visualization. Experienced in building predictive models and performing exploratory data analysis using Python, SQL, and modern libraries. Passionate about web scraping, turning complex datasets into actionable insights, and developing impactful, data-driven solutions.
My projects Get in touch







The idea is to go from numbers to information to understanding
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FleetPros
January 2024 - Current
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AwardLogic
January 2022 - December 2023
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AwardLogic
March 2021 - December 2021
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Freelance
June 2020 - February 2021
Lead Analyst / Developer
JavaScript, Node, Excel, Playwright
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Automated daily vehicle sourcing workflows, reducing manual labor by 40 hours per week and significantly improving operational efficiency
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Built scalable web scrapers to extract vehicle data across 8 car brands; developed internal data dictionaries to match unstructured feature info with trade-in value increases based on CarMax pricing, processing 25,000+ cars monthly
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Scraped and analyzed auction data from 10 websites, evaluating resale potential using historical bid prices for over 100,000 vehicles each month
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Conducted exploratory data analysis to uncover market demand trends and engineered new data features to support business strategy and vehicle valuation models
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Designed a custom filtering system to flag high-profit vehicles, cutting sourcing overhead by over 85% and optimizing purchasing decisions
Software Engineer
PHP, JavaScript, Node, Sabre APIs, ETLs, Playwright
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Constructed ETL pipelines to transform raw flight data from Sabre APIs into structured formats, supporting 60% of the company’s software applications and improving data consistency across platforms
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Developed robust HTTP request modules using PHP (cURL, Guzzle) and Node.js (fetch, axios), coordinated via Playwright automation, to ensure seamless communication and data exchange among 5 internal APIs
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Engineered efficient parsers for real-time extraction of flight information, increasing the platform’s available content by 7%, enhancing user search capabilities and customer satisfaction
Software Developer
PHP, JavaScript, Node, Sabre APIs, ETLs, Playwright
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Collaborated with 6 travel agencies to analyze and translate complex airline commission structures into automated business logic, ensuring precise and efficient commission calculations
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Developed automation scripts that reduced manual weekly commission calculations by 25%-40%, significantly improving operational productivity and accuracy for client organizations
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Built and maintained a Puppeteer-based web scraper to regularly retrieve, transform, and ingest commission rules from over 100 airlines
Software Developer
Python, JavaScript, Scrapy, Playwright
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Developed Python Scrapy web crawlers to automate extraction of real estate data for 650,000+ Ohio parcels.
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Created ETL pipelines to streamline data processing, saving 25+ manual work hours per week.
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Improved software efficiency by 14% through bug fixes and performance testing related to external data updates.