Karsten Walker Email & Phone Number

Mountain View, California, Us

Free Marketing Analytics (Social Media, SEO, Earned Media, etc)- Tax Year 2023 Off Season/Tax Year 2024* Build machine learning models for customer targeting.* Partner with data teams to automate ingestion of third party data to augment datasets used for platform campaign analysis and causal inference geo tests.* Work with stakeholders across marketing to identify ways in which we can leverage ML and Analytics to measure the impact of marketing interventions.* Use Causal Inference to measure the impact of specific types of marketing campaigns on KPIs. * Mentor Analysts in development of skills in ML, causal inference, and time series forecasting techniques.Social Media Marketing Team- Tax Year 2023* Used Bayesian statistics to estimate campaign traffic responses from prior distributions. * Built an ad spend analysis dashboard that provided spend effect curves to identify diminishing returns.* Provided proactive campaign performance deep dive analyses that led to 200% increases in the number of site visitors that authenticated into the product.Experimentation Methodologies FY23/24* Built batch processing data pipelines that collect experiment metadata from statistical analysis, experiment routing, marketing, and planning tools for executive-level reporting (PySpark, Scala, Python). * Quantify the incremental revenue gains from experimentation methods. * Own a Senior Leadership Team facing Experiment Portfolio Health Dashboard that is the source of truth for program level experimentation data.Staff Technical Project Manager, Experimentation Methodology FY22* Reported on Experimentation Program goal performance at the Company goal level.* Built a Program Health Dashboard that used Z-Curves to estimate experiment replication rates.* Assisted teams with the adoption of Sequential A/B testing, Bayesian A/B testing, and Multi-armed Bandits and application of methods to business areas.

-I took a few months between jobs to spend time with my new child to "figure out" life as a parent.

San Francisco, California, Us

- Cost optimization of compute clusters: Multivariate testing, Difference-in-Difference estimation, Dynamic Time Warping and synthetic controls, and Causal Impact modeling to measure the effects of query speed on user behavior. - Account Health classification model used by 45 Customer Success Managers to identify “unhealthy” accounts based on product usage data. Product health classes from the model were used to segment Quarterly Business Reviews. Reduced annual churn by 55%. Saved each CSM an average of 6hrs of manual work/week.- Built six multivariate Product KPI forecasting models outputs used by the C suite and Board of Directors.- Conducted research and built product features such as forecasting and anomaly detection cross-correlation, time series pattern matching, A/B Testing (Bayesian and Sequential), funnel significance tests, and process mining.- Designed Amplitude’s future A/B testing platform from methodology to visualization design.- Data Engineering of raw Postgres event data into relational tables in Snowflake via Airflow.

San Francisco, California, Us

-Own, manage, and implement the models (multi-class classification) that inform Dropbox's user segmentation across the entire customer journey for all of Dropbox's SKUs (Basic, Plus, Pro, Business). Includes management of cross-functional IC's on projects in Data Science, Machine Learning, and Product.-Work with Populations Platform Engineering to integrate model outputs so that Growth can leverage model populations for user engagement, A/B testing/experimentation, page routing, and feature roll-out.-Work with Engineering teams to ensure that all data pipelines, compute clusters, and technical outputs meet availability, latency, and volume specifications. Integral in assisting in the design of the Segmentation Service back-end.

San Francisco, California, Us

-Owned, managed, and implemented the models (multi-class classification) that inform Dropbox's top-of-funnel user segmentation strategy for Dropbox Basic conversion. Models led to $XXM/XX% increase in ARR.-Managed the application of Contextual Bandits for matching ad CTA to user context including A/B and MVT tests.-Own, manage, and implement a Bayesian A/B testing system including MCMC sampling, stopping criteria, user interface, and reporting.-Advise on overall Growth Customer Journey technical strategy.

Berkeley, Ca, Us

-Led and directed the Advanced Analytics Program -Managed an ad-hoc four to six member analytics team on four high profile projects. -Project examples: Modeling the effect of Individual Retirement Account donations on giving patterns among donors; Effects of economic recessions and macro/microeconomic indicators on fund-raising patterns within donor cohorts and their application to predictive modeling.-Built classification models to identify the next area of giving and approximate giving amount.-Built revenue forecasting models for 16 academic fundraising units.-Created a macro/micro economic “Market Health Composite Index” of 30 years of internal and external data.-Coauthored four internal R packages.-Designed static and dynamic reports, visualizations, dashboards and web pages using Rmarkdown, Shiny, HTML, Java Script, and Plotly Dash

Assist in the development and implementation of a unique test-based product development methodology.Supervise, implement, and analyze A/B testing, AdWords, and SEO efforts.Author investor pitch decks, product marketing materials, documentation, and website copy.

-Conducted user sentiment, classification, and survival analysis on over 100,000 unique users of 10 mobile applications.-Conducted A/B/n product marketing tests on over 500,000 unique users.-Conducted market research and analysis for the CEO, CTO, and VP of Product.

Washington, District Of Columbia, Us

Financial performance analysis for a $43 million USAID-funded project which led the region and company in net profit.Performed new business intelligence research on upcoming proposals, competitors, and personnel in the region.Authored myriad sections of USAID proposals.

Monitored insecurity flow and events in the Ein el-Hilweh Refugee Camp (Lebanon), the Bekaa Valley (Lebanon) and the Rafah border crossing (Egypt and the Gaza Strip).Investigated and mapped extremist indoctrination and recruiting networks in London and Hamburg.

Analyzed performance indicators, outputs, and objectives.Prepared logical frameworks for funding applications and evaluations.

M.A., International Relations- Foreign Policy, Transnational Organizations And Leadership, Middle East

B.S., Poltical Science, International Affairs, Islamic Studies

Bachelor Of Science - Bs, Political Science