Aaron Evans

Experience

2021 - Present

Build and launched a system enabling railroads to integrate with the Interline Settlement System (ISS) and Rate EDI Network (REN), growing it from an initial prototype to a 250K+ LOC production system.
Built a comprehensive test harness for validating the ISS system without access to a real ISS system or other carrier messages in a pre-production integration environment.
Created a novel approach to processing X12 EDI using protobufs. Brought all of the benefits of protobufs (e.g. declarative model, multi-language bindings, efficient encoding) to the ancient X12 EDI format.
Led the migration of services from AWS Lambda to gRPC/Kubernetes by establishing build and deployment infrastructure.
Designed and implemented a data ingestion pipeline in Go for railcar equipment data.

2020 - 2021

Owned web services managing Tableau Online Site lifecycle operations.
Defined a target architecture for transitioning from a monolithic system to a workflow-based orchestration system.

2015 - 2020

Owned and maintained the customer-facing the EC2 DescribeInstanceStatus API, one of the most frequently called and most critical APIs in EC2, along with its underlying data collection and ingestion pipeline.
Resolved a critical scaling bottleneck that required rearchitecting parts of the EC2 instance health data ingestion process.
Led key improvements to the EC2 hypervisor deployment process, reducing customer-impacting outages by proposing, gaining leadership buy-in, and coordinating implementation across multiple teams.
Conducted 1,200+ technical interviews as an Amazon Bar Raiser, playing a key role in maintaining high hiring standards.

2014 - 2015

Worked on an alpha capture system.
Re-designed and implemented login and session management across multiple sites.
Automated a release and deployment process using Ansible. Took a manual, multi-step process and transformed it into an automated, single-step process.

2009 - 2014

Designed and implemented a system to automate multi-region tasks across AWS
Lead/founding developer on a team that built systems to standardize the infrastructure hardware ordering process. Helped grow the team from 3 to 15 developers in a year.
Designed and implemented RESTful web services for Amazon's server provisioning system.
Added support for EC2 capacity into the server provisioning system to allow teams to adopt AWS and EC2.
On-call support - carried a pager and was first-responder for critical services. Involved in various large scale events.