Isobel Redelmeier
Principal at Downdog
San Francisco, California, Canada
Summary
🤩
Rockstar🎓
Top SchoolIsobel Redelmeier is a Principal software engineer based in San Francisco with a decade of experience building reliable, high-performance backend systems and observability tooling. She has shipped production-grade infrastructure at companies like Discord and LightStep and contributed to OpenTelemetry Go—improving API completeness, concurrency tests, and thread-safety—that supports a widely used observability ecosystem. Comfortable working across languages, she’s implemented performance-critical native components (an Elixir SortedSet backed by a Rust NIF) and added jemalloc-based memory insights to drive real-world optimizations. A former consultant and teacher who pairs well with product teams, she blends pragmatic engineering, mentorship, and a knack for shaving the metaphorical yaks to make complex systems maintainable.
10 years of coding experience
9 years of employment as a software developer
Post-baccalaureate Computer Science, Post-baccalaureate Computer Science at Tufts University
English, French, German
Github Skills (14)
opentelemetry10
rust10
go10
tracer10
performance-optimization10
trace10
api-design10
elixir10
testing10
concurrency9
logging4
github-ci4
metric4
githubaction-workflow4
Programming languages (18)
Github contributions (5)
discord/sorted_set_nif
Jul 2021 - Jul 2021
Elixir SortedSet backed by a Rust-based NIF
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits, 11 PRs, 14 pushes in 5 days
Contributions summary:Isobel primarily contributed to the development of a Rust NIF (Native Implemented Function) for an Elixir SortedSet. They implemented core functionalities like adding, removing, and slicing elements, focusing on optimizing performance through native code. The contributions included upgrading dependencies such as Rust and jemalloc_info, and also involved refactoring, and adding jemalloc_info calls for memory allocation insights. Furthermore, they released multiple versions of the library, indicating active development and maintenance.
rustnifelixirbacked
open-telemetry/opentelemetry-go
Jun 2019 - Dec 2019
OpenTelemetry Go API and SDK
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:13 commits, 18 PRs, 79 comments in 5 months
Contributions summary:Isobel contributed to the OpenTelemetry Go project by creating separate Go modules for examples, reducing dependencies in core code. They exported `NoopSpan` and `NoopTracer` for API completeness. The user also refactored code to rename `IsRecordingEvents` and `WithRecordEvents` and propagated `FollowsFrom` span relationships in the SDK. Additionally, they added concurrency tests to the tracer test harness and addressed thread-safety concerns within the SDK.
golangapitracingsdkobservability
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