Zach Humpherys

• Wrote an integer program for a critical optimization problem, demoed an ultra-fast hybrid solution and taught LP/IP theory to the team, presented a design doc to a senior and principal with in-depth comparison of integer programming, simulated annealing, column generation, and more, receiving praise from leadership
• Designed and delivered the base implementation for the KCL's new single-table format on a time crunch, with delicate in-place migration support
• Invented a system to coordinate feature rollout across deployments of KCL versions based on deadlock-free merging of state machines, utilizing graph algorithms like cycle detection, topological sort, and dominators
• Fixed an obscure race condition in the C++ core of the KPL for one of our biggest customers; thoroughly whiteboarded and reproduced the different cases with a custom simulator
• Created a canary to launch scheduled test workflows, integrating AWS services like Lambda, CloudFormation, S3, and EventBridge with internal build tools to enhance testing capabilities
• Added IPv6 coverage to an API endpoint tester using an HTTP adapter, creating the necessary routing table and VPC infrastructure changes using CFN
• Onboarded one of our components to a fault injection microservice to chaos test a dependency outage scenario
• Tested and delivered the KPL changes to add support for 10MB records, debugging rate limiting and batch aggregation code paths
• Created a monitor to respond to user input in DDB by excluding hosts from holding leases or leadership based on a regex pattern
• Prototyped a solution to force leadership to specific pipeline stages during a deployment with rollback detection based on timestamps and version comparison
• Contributed to the server-side buildout of an important new API launch, converting high-level designs to workflow implementations for the feature set
• Resolved deployment safety risks and incorporated CI/CD best practices through a homegrown IaC framework
• Iteratively brought the deployment pipeline for one of the largest fleets in Kinesis into compliance with company-wide deployment automation standards
• Designed, implemented, and demoed a prototype where I onboarded our service to a dynamic config solution, wrote automated scripts to be hooked into our deployment pipeline, and updated our leader election algorithm, documenting tradeoffs and would-be race conditions along the way
• Spearheaded an opportunity to utilize an automated testing feature to save ongoing operator effort and engineer bandwidth

• Worked on the Payer Platform application team to improve relationships between payers and providers and shift the United States towards value-based care
• Collaborated with project stakeholders and subject matter experts to identify and address diverse customer use cases
• Learned through code review and complex testing workflows about current development in various subdomains of Payer Platform, especially claims exchange and member attribution
• Created an automated report workflow for customers to view their attributed members
• Investigated solutions for client-server communication issues over FHIR, enhancing interoperability with external systems
• Participated in cross-team data model and infrastructure discussions concerning topics like risk adjustment and prior authorization
• Completed a rigorous training program and became internally certified for development using Typescript, C#/.NET, and React, along with Epic's own APIs and frameworks

Worked in a small professional software development environment at a startup; earned selection due to performance in two technical interviews.

An opportunity I had before heading off to college to bring chess into the lives of young kids