Christian H. Email and Phone Number

* Developed and implemented into production a new personalization engine for recommending the most likely next category for returning clients.* Designed and created a new ranking algorithm for clients to book a tasker for a job this has measured impact on both revenue and overall experience.* Using both Logistic Regression and other modeling techniques to understand the factors that lead clients to retain or churn.* Designing and implementing A/B tests for both product features and machine learning model improvements.

Contract work for various teams and projects. Some key responsibilities are:Data Mining and Cleaning (ETL): -- Extracting data from web sources both structured and unstructured - Assessing quality of data and the data pipeline structureExploratory Data Analysis (EDA): -- Visualizing data, e.g. understanding customer distributions and groupings of targeted features - Segmenting users and studying subsets of dataStatistical Inference (Experimental design and analysis): -- (A/B Testing) Optimizing click-through rates for both mobile and web analytics -- Experimental design, i.e., understanding statistical power and confidence intervalsMachine Learning (Python/Scikit-learn): -- Supervised learning models (predict churn and conversion rates, predict prices) -- Unsupervised learning methods (cluster users into distinct segments, association rule learning)

• Metis is a competitive 12-week data science immersive program in San Francisco with a curriculum designed by Datascope Analytics.• Developed and presented five business-applicable data projects, a few examples are:-- Designed a pipeline of deep learning algorithms to perform unique image augmentation and stylized to produce artistically styled objects in images.-- Created an application to predict crime incidents to visualize crimes on a basemap and the probability of an incident in a location and time.-- Implemented sentiment analysis across entire books to find key archetype clusters and engineered natural language features to produce a recommender system.

• Leading a small team to provide quality and consistent service on a daily basis • Adapting management styles to produce quality outcomes of employees• Trained new employees in customer service and service skills• Maintained and monitored necessary materials for normal restaurant procedures

Using what I know and what I can do to help young students in San Francisco from middle school to high school.

• Modeled Photon interactions and performed radio-wave experiments on scaled 3D structures to compare results and improve performance.• Performed signal analysis of wave patterns in a novel optical structure to detect and strengthen the received signals. • Created a standard for A/B testing of waveform patterns in different structures. • Advanced research on novel Photonic Structures.

• Mastered laboratory techniques to preform experiments on semiconductor devices.• Utilized complex electronics and physics concepts to preform calculations• Gained engineering techniques and gained hands-on experience with wafer doping and etching.

• Provided technical support at SFSU Student Services Building• Mastered and troubleshooted specialized software and hardware for people with special needs • Performed routine computer repair and customer service.