Jacob Stein Email & Phone Number

Menlo Park, Ca, Us

Memcache Team- Led efforts to improve efficiency and reliability for the Memcache service, a high throughput, distributed in-memory key-value store that serves billions of QPS from Meta productsand services.- Developed an optimized read-focused FIFO cache library which reduced read latency by60% over the existing caching libraries (C++)- Designed and implemented a local hot key cache for Memcache clients to reduce thenumber of hot keys and improve reliability of the memcache service. Reduced globalQPS by ~1 billion QPS, while improving client side performance.

Seattle, Wa, Us

AWS Athena Team- Led a cross functional project to add read and write support for the Ion data serialization format to Athena. Designed the overall project, implemented changes in both Athena’s DDL and DML engines, and developed enhancements for OSS Ion Hive Serde- Designed and implemented syntax for time and version travel in Athena’s DML engine and open sourced it to Trino. - Implemented time travel SPIs and functionality for LakeFormation governed tables

New York, Ny, Us

Enterprise Tech team Worked on maintaining the Teem application and converting it from a monolithic structure to a horizontally scaling, service based architecture.• Designed and implemented a database router to manuallyshard the existing PostgreSQL database (Django)• Optimized server-side APIs to create/edit/delete rooms anddesks in bulk (Django)• Created an horizontal-stepper component to support wizard-style workflows (EmberJS)

Verona, Wi, Us

Referrals and Authorizations team - 1.5 years• Technical Lead• Created a framework for revenue cycle users to create and send custom documents to payers. (Cache, VB6, C#, Javascript)Real Time Authorization team - 2 years• Mentor for new hires• Implemented a modified version of word2vec to categorize benefit plans from different payers (Cache)• Developed EDI message error handler and new features/specs for 278R/278N messages (Cache, C#, HTML)Eligibility team - 2 years• Developed workflow to gather patient data from an insurance card using OCR (Cache, C#)• Maintained 270/271 message codebase (VB6/Cache)

St. Paul, Mn, Us

Implemented a depth perception algorithm into image matching softwareBased on the waterfall and watershed algorithmsDeveloped in C++

St. Paul, Mn, Us

Created a Terahertz Spectroscopy SystemDeveloped an experiment to test the electromagneticproperties of graphene after exposed to Mid-Infrared LightHonors Physics Capstone Research

St. Paul, Mn, Us

Created a Weak Gravitational Lensing SimulationMonte Carlo simulation with 10,000,000 raysImplemented a Ray Tracing Algorithm in CUsed VIRGO data (http://www.mpa-garching.mpg.de/galform/virgo/) for stellar objects

Bachelor Of Arts (B.A.), Computer Science/Physics

Study Abroad, Computer Science