Senior Go / Golang Software Engineer

About the role

Senior Go / Golang Software Engineer

Location: Redmond WA

Third-Party Open-Source Package Upgrades

Must Have

Copybara or OSS

Role mission

Own the engineering path for complex third-party package upgrades, from assessment and version change through dependency remediation, build and existing-test stabilization, presubmit validation, change submission, and migration reporting.

Role Summary

We are seeking a highly skilled Senior Go Software Engineer to deliver complex third-party open-source software (OSS) package upgrades within a large-scale monorepo environment. The engineer will assess package and dependency impacts, execute version upgrades, remediate compatibility issues, stabilize builds and existing tests, complete applicable presubmit validation, submit review-ready changes, and maintain clear migration records.

Scope emphasis: The role focuses on diagnosing, fixing, and executing existing tests affected by package upgrades. Creation of new unit or integration test suites is not required.

Key Responsibilities

Package Assessment and Upgrade Planning

Assess assigned packages, dependency trees, API-change exposure, build impact, and upgrade friction before execution.

Identify compatibility risks, upgrade constraints, and required remediation within the approved scope.

Dependency Management and Remediation

Upgrade Go modules and third-party package versions.

Separate version bumps from local patches where required.

Reapply, update, or safely retire existing patches and document their disposition.

API Migration and Code Changes

Resolve breaking API changes introduced by upgraded libraries.

Update directly affected downstream callers within the approved scope.

Apply idiomatic Go refactoring practices while maintaining functional compatibility.

Build, Test, and Presubmit Stabilization

Diagnose and remediate Go and Bazel build failures attributable to the upgrade.

Fix existing test failures and applicable CI or presubmit failures caused by the package change.

Isolate compiler, linker, build, test, and runtime issues introduced by dependency upgrades.

Source Synchronization and Integration

Maintain Copybara configurations.

Troubleshoot source-synchronization and integration issues associated with package changes.

Support clean propagation of approved changes across relevant environments.

Change Management and Documentation

Submit review-ready change lists with clear technical rationale, validation evidence, patch status, and traceable migration records.

Document and escalate material package deviations, external blockers, and cross-product dependency impacts with actionable evidence.

Maintain disciplined handoffs and reliable progress reporting against assigned priorities.

Automation and Engineering Efficiency

Use approved internal tooling and reusable automation to accelerate analysis, failure triage, validation, and evidence capture.

Contribute reusable learnings, upgrade playbooks, and automation patterns within controlled enterprise environments.

Required Qualifications

7+ years of software engineering experience, including substantial hands-on development and debugging in Go.

Strong command of Go modules, semantic versioning, transitive dependency resolution, package compatibility, and idiomatic API refactoring.

Practical experience with Bazel, go build, go test, CI/presubmit pipelines, and large or monorepo-based build environments.

Demonstrated ability to isolate and remediate compiler, linker, build, test, and runtime failures introduced by dependency upgrades.

Proficiency with Git-based change management, code review, merge-conflict resolution, and local patch lifecycle management.

Strong Linux and scripting skills for investigation, repeatable validation, and engineering automation.

Clear written and verbal communication, disciplined documentation, and effective collaboration with reviewers and language subject-matter experts.

Mandatory Technical Skills

Go / Golang

Go Modules

OSS Package Upgrades

Dependency Management

Semantic Versioning

Bazel

Git

Linux

CI / Presubmit

Python

Shell / Bash