Experience

Took over as lead developer and shipped a critical multiplayer server allocation and matchmaking service that was falling behind schedule (prior to my joining) by redesigning its approach to request handling, improving performance dramatically.
Project planning and onboarding for newly acquired game studios.

Building tools to aid in root cause analysis for failures in Meta's in house content delivery network.
Improving a correlation engine critical to the maintenance of Meta's network infrastructure.
Eliminated N+1 queries in a critical system that were hindering production performance and causing data loss with a refactor - the data loss and performance issues were completely resolved.
Led efforts to automate mission critical processes, related to rolling out changes to Meta's content delivery network.

Team lead overseeing configuration management across Twitter data centers and cloud providers.
Wrote static analysis tools to detect problematic Puppet code and automatically fix it.
Wrote code generation tools to increase developer productivity.
Developed services to increase observability into the status of puppet releases.
Built cross-team relationships that unblocked important projects which had been stalled due to misunderstandings.
Held regular meetings with teammates to help them do their best work. (Mentoring)
Led yearly and quarterly team OKR/project planning and roadmapping.
Communicated the successes and ongoing progress of the team to the larger SRE and software engineering organizations.
Identified cross organizational opportunities and eliminated redundant work.

Led development of an in house distributed log tailer and metric exporter.
Decreased memory usage by ~100x and CPU by ~10x in system daemons, with huge cumulative savings.
Mentored teammates and helped them identify opportunities for taking on impactful projects.
Helped build out an interview process for a newly minted SRE-SWE role pipeline.
Wrote mapping tools that revealed hidden dependencies between parts of our infrastructure.
Designed monitoring systems that helped us understand the performance of our logging platform.

Oncall for Google's entire payment processing infrastructure.
Wrote developer productivity tooling (with a focus on static analysis and debugging tools).
Reviewed design proposals, across teams and organizations, for new software.
Performed monitoring and SLO adjustments to decrease toil.

Performed regular oncall shifts to support the world's largest CDN.
Built, trained and deployed (TensorFlow) models to help automate oncall work.
Wrote developer tooling for internal platforms and domain specific languages.
Troubleshot software and hardware problems with non-Google employees located in datacenters around the globe on a regular basis.

You can see many of my commits at => https://github.com/mozilla/gecko-dev/commits?author=usize
For WebAssembly work see => https://github.com/bytecodealliance/wasmtime/commits?author=usize
Implemented sorting for typed arrays (new Int32Array([4, 3, .., n])).sort();
Implemented sorting for arrays with custom comparators [4, 3, .., n].sort((x, y) => x - y);
Implemented object destructuring [with default values] {x=1} = {}; x === 1;
Rewrote parsing logic for the Date object new Date("5-26-1988");
Added [Learn More] links to JavaScript error messages in the Firefox web console.
Added smart multi-line editing to the Firefox web console.
Contributed to WasmTime, a code generator for WebAssembly.

Part of the team that built TaskCluster, a task queuing system that powered Mozilla's build pipeline.
Designed and built a continuous integration system on top of TaskCluster, tailored to the needs of Mozilla's GitHub hosted repositories.
Created a secret management service, along with a novel (http proxy based) method for injecting secrets into running CI jobs.
Contributed to RelengAPI, a platform for building infrastructure services with RESTful APIs and nice self-serve interfaces.
Primary maintainer of "Runner," a specialized init system which forms the foundation of Mozilla's current build infrastructure. Runner saved over 72,000 minutes of compute time per day by reducing the setup/teardown time between builds.
Primary maintainer of "Clobberer," a service which allows developers to easily flush object caches across large numbers of hosts.
Containerized Linux Firefox Builds.

Education

B.S. Physics
GPA: 3.47/4.00

George V. Page Physics Award for Outstanding Scholarship in Physics (top GPA in graduating class)

Programming Languages: Python, Go, JavaScript, C, C++, Bash, AWK, Rust, Java, Ruby, Scala