Pura

Senior Data Engineer

Dutch Engineer

I can write blog posts, LinkedIn posts, demos, or share advice about your data or machine learning infrastructure.

Founder

EcZachly Inc

Instructor and Lead Teacher Assistant

Zwift

Build long-term roadmaps for machine learning platform and code best practices for the data science team
Orchestrated the implementation of DBT to build data lineage and shorten debugging time by 30%
Deployed XGBoost models to identify customers who will might or not subscribe in free trials. 
Lead a team to provide the best short-term and long-term solutions to reduce service downtime by 50%
Own e-commerce datasets to lower handle data quality, data contracts, and resolve pipelines downtime
Tools: AWS, Kafka, Python, Docker, Kubernetes, Scala, Spark, SQL, Airflow, Jenkins,  DBT

Senior Data and ML Platform Engineer

Clinical Trial Media

Documented technical specifications of workflows to be presented to stakeholders and executive team
Automated and optimized existing workflows using Prefect and dbt to adhere to best practices
Tools: DBT, Prefect, Azure, Azure Data Factory, Python, SQL, Tableau Server, Docker

Qumulo

Lead migration of on-premise pipelines to cloud capable of handling 210+ GB per day
Produce key metrics to counsel sales and engineering and drive product feature decisions
Integrate linters, tests, and CICD to improve Data Science code quality 
Tools: AWS, Redshift, S3, Postgresql, Pyspark, Fargate, Python, Gitlab CICD, SQL, MongoDB, Tableau

Data Scientist

Blueprint Technologies

Created 30,000 customers’ metric sheets that calculated employees behavior for 1.5 months before and 1.5 months after covid and presented to the c-executive suite of the F500 company 
Developed daily pipelines with >500 TB that build employee behavior metric sheets on request
Productionalize Decision Tree and Logistic Regression to prioritize likely buyers
Optimize SQL and PowerShell scripts to reduce running script from 3 days to 15 minutes.

Tools: Azure Databricks, Python, Plotly, PowerShell, C#, COSMOS, SQL

Data Engineer

Redapt Inc

Migrating Hadoop cluster on VMs to Google Cloud Platform's Dataproc cluster
Importing, cleaning, and visualizing data in Power BI dashboards
Building a storage infrastructure system to identify frequent patterns and errors 
Incorporating Machine Learning algorithms to recommend new items for over a million items and for several thousands of customers. 
Tools: Hadoop, Kafka, Airflow, Spark, Power BI, Azure Databricks, Azure ML Studio, Azure Blob Storage

Apex Learning

Build a python script to obtain Zendesk's data via its RESTful API for marketing reports
Redesigned monthly and yearly reports by incorporating Tableau Software to evaluate tutors’ performance 
Implement Salesforce.com to create an easily accessible school’s credit acceptance database for marketing campaigns 
Support middle and high school students’ through the Apex Learning Virtual School curriculum

Online Tutoring and Data Analysis

Projects

ILest: Ionic Liquid estimation Tool
Team project, Implemented LASSO, SVR, and MLP-Regressor on 10,000 data points to estimate the desired properties of ionic liquid binary mixtures for electric battery applications
Tools: scikit-learn, Pandas, RDKit, Matplotlib

Data-Driven Design of Perovskite
Team Project, Carried out LASSO, and supervised neural networks on a reduced data set to identify the optimal combination of elements in the hybrid organic perovskites (crystals)
Tools: scikit-learn, Pandas, RDKit, Matplotlib

Stack Overflow: Suggest a Tag for My Post Please 
Queried 150k posts and users details to determine tags needed based upon a posts' body or score.
Tools: PySpark, Neo4j, Plotly, Python, Cypher, SQL

How Much Will Your Videogame Sell For? 
Web scraping video game tweets and statistics from VGChartz to predict their unit sales using machine learning
Tools: BeautifulSoup, Matploblib, multiprocessing, requests, plotly

Twitter Scraping Tool
Web-scraped old tweets from the twitter page to eliminate the usage of the Twitter Official API and decrease the time needed by 60%. Tools: pyquery, requests, datetime

Senior Data & ML Platform Engineer | dutchengineer.substack.com | Host of Ask A Data Mentor Podcast

Built long-term roadmaps for data platform and machine learning platform
Experience in designing, analyzing, and visualizing large (>500 TB) datasets 
Build and manage multiple ETL infrastructures to identify text patterns and detect network and hardware anomalies
Prepare critical metrics to guide product decisions in people, healthcare, computer games, and chemical analytics
Multilingual (Dutch, English, Spanish)

Keywords: Airflow, AWS (Cloudwatch,  ECS, EKS, Fargate, Glue, Redshift, Kinesis, Databricks, Postgresql, S3), Azure (Azure Functions, Azure ML Studio, Databricks, PowerBI, SQL Server), BentoML, C++, Datadog, Docker, ElasticSearch, Flink, Kafka, Keras, Kubernetes, Hive, High Performance Computing, Github Actions, Gitlab CICD,  Pagerduty, PowerBI,  Prefect, Python (DBT, Numpy, Pydantic, Sklearn,Scipy), Pyspark, Neural Network, Natural Language Processing, MLFlow, MongoDB, Recommendations, Sagemaker, Scala, SparkML, SQL, Tableau, Terraform

Sarah Floris, MS

Engineering program manager, Agile coach, & biggest fan of all Zwift's Platform/Backend teams: SRE, Systems Architecture, Relay Server, Cloud Infrastructure, Subscriptions & Payments, Data Engineering, IT/IS, & Game Engine. Mentored engineering managers of all offshore engineering teams to independently effectively manage Agile ceremonies & artifacts. Established healthy self-sustaining communication channels between offshore & onshore teams. Co-ordinated multiple cross-functional teams to deliver successful on-time launch of major relay-server algorithm update with no rollback & minimal post-launch defects. Helped establish team & process to deprecate server monolith into microservices (while still delivering smooth weekly releases of remaining monolith code). Supported SRE team in establishing production-health dashboards & response processes for the entire engineering org. Led subscriptions & payments tech teams that designed & launched a new coupon functionality allowing subscription/hardware bundle sales--on time with no critical post-launch defects (currently 30% of new subscriptions). Created Zwift's first Maintenance/Outage process & checklist resulting in calm, predictable events supporting 99.9% uptime SLA since June 2020.

Staff Technical Program Manager, Engineering

Edmunds

Managed a portfolio of teams and initiatives, including the SEO and Advertising teams (responsible for enabling the delivery of ~$100M/year revenue via a custom platform that creates and serves native ads for automotive clients). Coordinated and executed complex cross-team initiatives for SRE, Technology, and Editorial teams. Jira administrator, Agile/Scrum/project-management coach and mentor.

Senior Technical Program Manager

New Context Services, Inc.

Project-management consultant for tech startup; wrote SOWs resulting in over $600K contracts; built team and managed an Agile project to develop security/data-assurance software to productize client's cryptography algorithm.

Project Management Consultant

Edmunds.com

Managed a variety of large, complex, test-driven, Agile, frontend and backend shared-service projects in support of the complete redesign of Edmunds.com. My teams (including both in-house and offshore developers) wrote a CMS for all Edmunds.com content, and a new message-bus based publishing platform which included migrating a large number of data sets to new data-services layer and deploying an in-memory data grid. Also led an Internal-Tools development team that provided management, monitoring, and diagnostic applications for these systems.

Senior Technical Project Manager

Symantec

Planning, development, deployment, and maintenance of client, server, web and IT projects to support over 50 million consumer endpoints.

Principal Program Manager

Movielink.com

• Managed iterative initiatives and maintenance releases for front-end, back-end, business systems, client-server, IT/operations, and content-management systems at Movielink (a web-based Video-On-Demand and Electronic-Sell-Through movie-downloading service, subsequently bought by Blockbuster). 
• Piloted the first use of Scrum in the organization. 
• Administered the Change Control Board, and managed the change-request process from end-to-end.
• https://en.wikipedia.org/wiki/Movielink

Senior Program Manager

• Built a new software-development team of 10 people, responsible for all aspects of a market-leading $18 million/year retail software. 
• Directed technology transfer during $80 million acquisition.
• Shipped first Norton AntiVirus for UNIX (NAV for Internet Email Gateways) in 6 months from kick-off to ship, coordinating multiple off-site teams. 
•Defined product requirements and ensured technical implementation. Created project plan and schedule, managed through software-lifecycle process; obtained buy-in from stakeholders. 
•Tracked and prioritized defects. Responsible for localizability of product.

Development Team Lead

• Hired, trained, developed, and managed technical writers, graphic artists, and managers.
• Coordinated writing, programming, and graphics resources in the creation of help systems leveraging a variety of technologies including HTML, ActiveX, VB, database.
• Wrote scripts and specified audio and video for Symantec's first digital users’ guide; wrote, compiled, and debugged it.

Manager of Technical Publications, Graphics, and UI Design

I develop, coach, empower, enable, and gently nudge software development teams to arrive at a shared vision aligned with organization goals. Then we deliver that vision: predictably, transparently, & humanely. We use lean methods. We value personal interaction & working solutions over processes & documents. We assess priorities, effort, resources (rigorously & frequently), then hold each other accountable to the goals we set for ourselves & the agreements we make to each other. We help each other, & care for our extroverts and our introverts. We have fun. I remove blockers, optimize signal-to-noise, & manage up (& out).  I take the blame & give the credit. I Zoom like a champ but prefer being in an office with other humans.

[Buzzword Version: seasoned Agile/Scrum leader; delivers multiple high-risk, high-profile, date-driven projects on-time, on-budget; small scrappy startups to large international security-software corporations. Builds teams, removes roadblocks, manages risks, balances needs of customers, business, management, team. Organized, self-motivated, adaptive, diplomatic team-player; excellent writing and speaking skills. Jira, Agile, test-driven development, Design Thinking, distributed teams, offshore development]

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Sarah Floris, MS

Susan Stahl

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