Satana de Santana

Senior Software Engineer @GitHub

London, GB

As a senior software engineer, I contributed to low-level and wide-impacting parts of GitHub\'s platform, improving performance, efficiency, security, observability, and maintainability, and assisting teams with documentation and guidance in those areas.Highlights:* Consolidated GitHub and GitHub Enterprise build scripts and Dockerfiles, reducing maintenance toil, improving support experience and fixing security issues* Supported architectural decisions with expertise in DataDog metrics emission and performance measurement* Migrated DataDog\'s transport from UDP to UDS, allowing the measurement of dropped metrics, and improving performance and efficiency of a high throughput distributed system* Migrated GitHub between GNU/Linux distributions to keep up with new security requirements and software updates* Debugged the root cause of a mysterious error in the trilogy MySQL driver, revealing a bug in libcurl, by patching the OpenSSL library to bubble up a stack trace from C to Ruby* Optimised DataDog\'s ruby client gem concurrency with async metric serialisation, reducing site latency and maintenance costs* Won the first company-wide CTF (Capture The Flag) in a team of 4 colleagues* Supported the sharding of GitHub\'s MySQL clusters by patching Vitess to speed up DDLs and fix a query scattering case* Fixed a race condition when emitting metrics to DataDog* Identified, reported and fixed an RCE (Remote Command Execution) vulnerability