Golang Developer with OSS Package C2C requirements

Tech Mirrors; Frisco (TX); Hybrid; USD 70,000 - 95,000; Full time

Job summary

Tech Mirrors seeks Go (Golang) engineers with deep OSS package ecosystem expertise to manage complex package upgrades across large codebases in a hybrid Redmond/Frisco setup. This contract role pays $60/hr on a C2C basis, targeting 7+ years of experience.

The team handles dependency analysis, API migrations, and build/test engineering within CI pipelines, with focus on automation and upstream collaboration.

Qualifications

• Strong software engineering experience in Go (Golang).
• Deep understanding of Goroutines, Channels and concurrency patterns.
• Experience with memory management and context propagation.
• Ability to handle error strategies in production-grade apps.
• Proficient with Go Modules, GOPROXY and dependency resolution.
• Experience with semantic versioning, package publishing and OSS maintenance.
• Proficient in Build & CI/CD pipelines and related tooling.
• Hands-on with Bazel, Go Build, Go Test, GitHub Actions and Jenkins.
• Experience with large-scale build environments and migration engineering.
• Expertise in Git, monorepos and repository management.
• Familiarity with Copybara or similar tools.
• Linux systems expertise and container tech (Docker, Kubernetes).
• Cloud-native development practices.
• Experience upgrading OSS, contributing to Go projects, and dealing with supply-chain security.

Responsibilities

• 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 apps.
• Drive package modernization and retirement of obsolete dependencies.
• Manage end-to-end package migration activities.
• Investigate dependency conflicts and version incompatibilities.
• Resolve issues from indirect and nested dependencies.
• Analyze API deprecations and breaking changes from upgrades.
• Create remediation plans for compatibility issues.
• Develop migration strategies for large ecosystems.
• Troubleshoot and resolve code breaks from package migrations.
• Modify Go apps and libraries to align with updated APIs.
• Perform root cause analysis of runtime, functional, and integration failures.
• Develop fixes for OSS-related defects and upstream contributions.
• Diagnose and resolve build failures from upgrades.
• Fix unit/integration/regression test failures.
• Ensure CI/CD pipelines validate changes.
• Resolve failures in presubmit validations.
• Improve build reliability and automation for migrations.
• Manage Copybara configurations and sync workflows.
• Troubleshoot repo synchronization and code migration issues.
• Resolve merge conflicts and code integration challenges.
• Support source movement between internal/external repos.
• Create and maintain local patches for package compatibility.
• Track upstream fixes and retire local patches when possible.
• Manage patch lifecycle and release readiness.
• Maintain upgrade docs and remediation records.
• Develop automation for dependency discovery, version analysis, impact assessment, upgrade validation, and failure triage.
• Build tooling to improve migration velocity and productivity.

Skills

Go (Golang)

Goroutines

Concurrency patterns

Memory management

Context propagation

Error handling

Go Modules

GOPROXY

Dependency resolution

Semantic versioning

Package publishing

Open-source maintenance

Build & CI/CD

Bazel

Go Build

Go Test

GitHub Actions

Jenkins

Buildkite

GitLab CI

Troubleshooting large-scale build envs

Dependency & Migration Engineering

Git

Monorepos

Copybara

Code review

Linux systems

Docker

Kubernetes

Cloud-native

OSS upgrade programs

Public Go contributions

Supply-chain security

Vulnerability remediation

SBOM generation

Release engineering

Tools

Copybara

Git

Job description

Role: Go (Golang) Engineers with OSS Package Ecosystem

Location: Redmond Washington / Frisco, TX (Hybrid)

Exp: 7 + years

Contract

Rate: $60/hr on C2C

Key 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.