Sam Gwydir
Summary
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RockstarSam Gwydir is a systems-focused software engineer with six years of experience building resilient distributed infrastructure, currently working on FoundationDB performance and chaos testing at Snowflake and now a Member of Technical Staff at Perplexity. He specializes in storage engine optimization across AWS, Azure, and GCP, fault-injection tooling for large-scale clusters, and low-level systems work from network overlays to hypervisor fixes. Sam is an active contributor to the flagship open-source FoundationDB project, improving its mako testing framework and C bindings to strengthen core testability and reliability. Comfortable in both startup and enterprise environments, he has a track record of shipping pragmatic, high-impact fixes—sometimes improving subsystem performance by orders of magnitude—and translating complex infrastructure failure modes into reproducible tests.
6 years of coding experience
Github Skills (9)
c1710
foundationdb10
test-framework10
key-value-store10
c1110
distributed-database10
testing10
acid9
transactional9
Programming languages (4)
Github contributions (5)
apple/foundationdb
Jan 2020 - Dec 2022
FoundationDB - the open source, distributed, transactional key-value store
Role in this project:
Back-end Developer
Back-end DeveloperContributions:41 reviews, 38 commits, 27 PRs in 2 years 11 months
Contributions summary:Sam primarily focused on enhancing the mako testing framework for FoundationDB, adding features such as the ability to set log groups and prepend padding. They contributed to the core functionality of mako by implementing an overwrite operation, improving the testing capabilities of the key-value store. The user also made several bug fixes and code improvements, primarily focused on the C bindings and utility functions.
foundationdbkey-value-storetransactionaldistributed-database
sfc-gh-sgwydir/foundationdb
Jun 2020 - Jun 2023
FoundationDB - the open source, distributed, transactional key-value store
Contributions:2 PRs, 163 pushes, 29 branches in 2 years 11 months
transactionalfoundationdbdatabasekey-value-storekey-value
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