Hengfeng Li
Software Engineer at google
Australia, China
Summary
🤩
RockstarHengfeng Li is a PhD-trained software engineer with 11 years' experience specializing in backend systems and cloud database integrations, currently based in Australia. He is an active open-source contributor to high-profile Google Cloud client libraries and samples, with notable work on Spanner across Ruby and Go projects where he improved emulator support, query options, JSON data types, and test reliability. His contributions show a strong focus on practical developer experience—adding SPANNER_EMULATOR_HOST support, optimizer statistics handling, and resilient testing patterns to reduce flakiness. Comfortable across languages, Hengfeng combines deep database expertise with production-grade engineering practices, shipping multiple library releases and sample improvements. Less obvious is his knack for improving test infrastructure and automation, which has repeatedly surfaced as reductions in intermittent failures and clearer integration workflows.
11 years of coding experience
Stackoverflow
391reputation
36kreached
7answers
5questions
Github Skills (33)
admin10
testing10
query-optimization10
databases10
database-administration10
spanner10
ruby10
google-cloud-spanner10
go10
api10
google-cloud10
sql10
golang10
database10
gcp9
Programming languages (15)
Github contributions (5)
GoogleCloudPlatform/golang-samples
Feb 2020 - Jul 2021
Sample apps and code written for Google Cloud in the Go programming language.
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:45 reviews, 22 commits, 35 PRs in 1 year 5 months
Contributions summary:Hengfeng primarily contributed to the Google Cloud Spanner samples repository, focusing on improving existing code and adding new functionalities related to the Spanner database. Their work included fixing recurring session deletion errors, addressing test flakiness by adding sleep times, and adding the creation of admin client for Spanner emulator. They also added code samples to demonstrate query options and updated existing samples to align with the new style guide, reflecting expertise in database interactions and potentially query optimization techniques.
golangappenginesample-appsgoogle-cloudgoogle-appengine
GoogleCloudPlatform/ruby-docs-samples
Mar 2020 - Oct 2021
Ruby samples for Google Cloud Platform products.
Role in this project:Back-end Developer
Back-end DeveloperContributions:32 reviews, 10 commits, 13 PRs in 1 year 7 months
Contributions summary:Hengfeng contributed significantly to the Google Cloud Spanner samples within the repository. Their work focused on implementing and expanding the available code samples, adding functionalities like creating instances, deleting data, and setting custom timeout/retry settings. They also added samples related to numeric data types and optimizer statistics packages, demonstrating a focus on the Spanner API's features and integration. This involved modifying and adding Ruby code and corresponding tests to showcase Spanner database interactions.
railsgooglegoogle-cloud-platformrubycloud-platform
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