Tristan Swadell
Senior Staff Software Engineer at Google
Menlo Park, California, United States
Summary
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Rockstar🎓
Top SchoolTristan Swadell is a Senior Staff Software Engineer based in Menlo Park with over a decade of hands-on experience and 15+ years working across startups and large tech organizations. At Google since 2013, he blends deep backend engineering with consensus-building to drive production-safe systems and tooling. He contributes to prominent open-source projects around the Common Expression Language and artifact metadata (grafeas), implementing parsers and CEL AST generation that power advanced filter semantics. Tristan specializes in making portable logic fast, safe, and featureful, and is comfortable turning ambiguous requirements into rigorous, testable implementations. A UC San Diego computer engineering graduate, he pairs systems-level thinking with practical build and tooling fixes that keep large codebases healthy.
10 years of coding experience
University of California, San Diego
Stackoverflow
151reputation
8kreached
4answers
0questions
Github Skills (24)
parser10
apidoc10
testing10
grammar10
grammars10
go10
api10
parsing10
parse10
antlr10
protobuffer10
protobuf10
computer-engineering9
bazel9
test-automation9
Programming languages (8)
Github contributions (5)
google/cel-spec
Dec 2017 - Sep 2022
Common Expression Language -- specification and binary representation
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:17 releases, 174 reviews, 34 commits in 4 years 9 months
Contributions summary:Tristan primarily contributed to the Go code within the CEL specification project. Their work involved fixing build tooling issues, making lint fixes, and implementing map comparison logic for tests. The user also created a Go module, updated proto options, and refactored code to support Golang protobuf v2 API. Further contributions included updating Google APIs repo references.
representationspecification-languagespecificationexpression-languagelexical-analysis
grafeas/grafeas
Feb 2018 - Mar 2018
Artifact Metadata API
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 commits, 1 PR, 9 comments in 20 days
Contributions summary:Tristan implemented a filter expression parser using ANTLR4, introducing a grammar to define the filter syntax. The parser supports logical operations, object field referencing, and function calls, similar to Google Cloud Logging Advanced Filters. The core contribution is the generation of the Common Expression Language (CEL) abstract syntax representation. The code changes included modifications to the parser's grammar and imports.
metadata-apiapiartifactmetadata
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