Senior GO Software Engineer

Senior Go Software EngineerWe 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 ResponsibilitiesAssess 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.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.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.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.Maintain Copybara configurations.Troubleshoot source-synchronization and integration issues associated with package changes.Support clean propagation of approved changes across relevant environments.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.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 Qualifications7+ 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 SkillsGo / Golang - Go Modules - OSS Package UpgradesDependency Management - Semantic Versioning - BazelGit - Linux - CI / PresubmitPython - Shell / BashNote: Python is retained as a mandatory skill based on the supplied requirement and is expected to support scripting, investigation, and automation. Go remains the primary engineering language for this role.Preferred ExperienceCopybara or comparable source-synchronization tooling.Large-scale OSS dependency upgrade, vulnerability-remediation, or package-maintenance programs.Complex dependency graphs, generated code, multi-target changes, and high-impact API migrations.Building reusable upgrade playbooks or automation within controlled enterprise environments.Platform engineering, developer infrastructure, build engineering, or release engineering environments.Expected OutcomesAccepted package upgrade: The package builds successfully, existing tests pass, applicable presubmits pass, and the change list is submitted.Complete migration report: Package and version details, code and dependency remediation, validation evidence, patch disposition, and documented exceptions.Predictable delivery: Early blocker escalation, clean handoffs, reusable learnings, and reliable progress against assigned priorities.