Benjamin Bang Email & Phone Number

Palo Alto, Ca, Us

San Francisco, California, Us

* Joined a Product Application team (Expenses) as a Backend Engineer, exploring a new frontier of the Backend Engineering in Spend Management* Product Services managed: spend, expenses, reimbursement, receipts, clawbacks, disputes, notifications, related tasks, AI-suggested spend limit assignment, Temporal receipt Workflows, Kafka event driven Processors

San Francisco, California, Us

* Led the Applied AI team from September to December as an interim Tech Lead

San Francisco, California, Us

Applied AI (Founder)* Founded a 3-person team, grew it to 7. Led team vision, hiring pipelines and ML best practices and team strategy.* Built a real-time recommendation k-NN Extreme Multi-Label Classifier based on cosine distance of NLP embeddings and expense features. Model will power Brex’s main spend management's auto-routing for spend, aimed to reduce credit card declines by X0% and customer delay in decline resolution by X0%* Built a near real-time Streaming Kafka/Event Data observability tool with Slack alerts, processing ~xxxK events daily and improved data quality by identifying new data incidents* Built a prototype of graph data interface (networkX) for PageRank-alike algorithm for fraud ring detection* Reviewed design docs, gave user feedback for Brex’s internal ML library, Fractal, and its new capabilities such as Feature/Model Service, Feature Values Cache, Local Testing Suite

San Francisco, California, Us

Credit Science - Underwriting Team* Researched/modernized the existing Simple Exponential Time Series model by exploring Facebook’s Prophet with Seasonality extracted from the spending patterns of Client Corporations.* Created & modified a front-end Product Applications via Retool for Human-In-The-Loop (HITL) credit modeling pipeline* Productionized small-business underwriting model, unblocking Brex’s small business launch in 2021* Fully automated validation testing pipeline for the mid-market underwriting model, saving hundreds of analyst hours* Built a microservice for handling synchronous HTTPs calls with Experian web services to extract client’s business credit information real-time and apply it for underwriting purposes

San Francisco, California, Us

San Francisco, California, Us

* Created, maintained, automated & tested Python and SQL scripts using Airflow & Jenkins used for Search Index Optimization that was used as the basis of ElasticSearch indices used for Physician search (Amino’s main app)

San Francisco, Ca, Us

Nashville, Tennessee, Us

* Built a Random Forest churn model, graph networks for hip replacement claims, Time Series Forecasting model* Maintained Python infrastructure for Medicare Bid Submission regarding risk score and medical initiatives projections

Nashville, Tennessee, Us

Master Of Science - Ms, Computer Science

Bachelor’S Degree, Statistics And Economics