Senior Software Engineer – Go (Golang) OSS Package Ecosystem

About the role

We are seeking an experienced Go (Golang) Open Source Software Engineer to drive the modernization and maintenance of large-scale third-party package ecosystems. The engineer will be responsible for performing version upgrades of open-source Go packages, resolving dependency conflicts, fixing code breaks introduced by package updates, and ensuring successful validation through build, test, and presubmit pipelines.

Responsibilities

• Open Source Package Upgrade Management
  • Perform version upgrades of Go open-source packages across large codebases.
  • Analyze package dependencies and transitive dependency chains.
  • Assess compatibility impact of package upgrades on consuming applications.
  • Drive package modernization and retirement of obsolete dependencies.
  • Manage end-to-end package migration activities.
• Dependency Analysis & Remediation
  • Investigate dependency conflicts and version incompatibilities.
  • Resolve issues arising from indirect and nested dependencies.
  • Analyze API deprecations and breaking changes introduced by package upgrades.
  • Create remediation plans for application and library compatibility issues.
  • Develop dependency migration strategies for large package ecosystems.
• Go Development & Debugging
  • Troubleshoot and resolve code breaks resulting from package version migrations.
  • Modify Go applications and libraries to align with updated package APIs.
  • Perform root cause analysis of runtime, functional, and integration failures.
  • Develop and maintain fixes for OSS-related defects.
  • Contribute improvements and fixes to upstream open-source projects where appropriate.
• Build & Test Engineering
  • Diagnose and resolve build failures triggered by package upgrades.
  • Investigate and fix unit, integration, and regression test failures.
  • Ensure successful execution of CI/CD validation pipelines.
  • Resolve failures identified during global presubmit validation processes.
  • Improve build reliability and automation around package migration workflows.
• Copybara & Source Synchronization
  • Manage Copybara configurations and synchronization workflows.
  • Troubleshoot repository synchronization and code migration issues.
  • Resolve merge conflicts and code integration challenges.
  • Support source movement between internal and external repositories.
• Patch Management
  • Create and maintain local patches for package compatibility.
  • Track upstream fixes and assess opportunities to retire local patches.
  • Manage patch lifecycle and release readiness.
  • Maintain upgrade documentation and remediation records.
• Engineering Automation
  • Develop automation for:
    • Dependency discovery
    • Version analysis
    • Impact assessment
    • Upgrade validation
    • Failure triage
  • Build tooling to improve migration velocity and engineering productivity.

Required Technical Skills

• Go Programming Expertise
  • Strong software engineering experience in Go (Golang).
  • Deep understanding of:
    • Goroutines
    • Channels
    • Concurrency patterns
    • Memory management
    • Context propagation
    • Error handling strategies
  • Experience developing and maintaining production-grade Go applications.
• Go Ecosystem Knowledge
  • Extensive experience with:
    • Go Modules
    • GOPROXY
    • Dependency resolution
    • Semantic versioning
    • Package publishing
    • Open-source package maintenance
• Build & CI/CD
  • Strong experience with:
    • Bazel
    • Go Build
    • Go Test
    • GitHub Actions
    • Jenkins
    • Buildkite
    • GitLab CI
  • Ability to troubleshoot large-scale build environments.
• Dependency & Migration Engineering
  • Experience performing:
    • Package upgrades
    • Framework migrations
    • Dependency conflict resolution
    • Version compatibility analysis
    • API migration and refactoring
• Source Control & Repository Management
  • Git expertise.
  • Experience with monorepos and large-scale codebases.
  • Familiarity with Copybara or equivalent repository synchronization tools.
  • Code review and branching strategy experience.
• Platform & Infrastructure
  • Linux systems expertise.
  • Container technologies:
    • Docker
    • Kubernetes
  • Familiarity with cloud-native development practices.

Preferred Qualifications

• Experience managing large-scale OSS upgrade programs.
• Contributions to public Go open-source projects.
• Experience with supply-chain security and dependency governance.
• Familiarity with vulnerability remediation practices.
• Experience with SBOM generation and management.
• Understanding of modern software release engineering practices.

Skills

• Golang