Golang Developer

Our client, is seeking a Senior Golang Developer to support a large-scale engineering environment focused on open-source package upgrades, dependency remediation, and build/test stabilization. This role is ideal for a hands-on engineer with strong Go/Golang development experience , expertise in dependency management, and experience working in complex monorepo or enterprise build environments.

Apply today for consideration!

Job Title: Golang Developer

Location: Bellevue, WA (Day 1 Onsite - Hybrid, 3 days onsite per week)

Duration: 5 months

Employment Type: W2 Contract

Pay Range: $47-52 per hour

Start Date: TBD — Candidates must be available to start within 1-2 weeks

Job Description

We are seeking a senior Go engineer to support complex third-party open-source package upgrades within a large monorepo environment. You will own the engineering process from package assessment and version changes through dependency remediation, build and test stabilization, validation, and change submission.

This is a highly hands-on engineering role focused primarily on upgrading existing packages and ensuring the existing test suites and applicable presubmits continue to pass . Creation of new unit or integration test suites is not required.

Key Responsibilities

Golang Development & Package Upgrades

• Assess assigned packages, dependency trees, API changes, build impact, and upgrade complexity

• Upgrade Go modules and package versions while managing version changes and local patches

• Reapply, update, or safely retire local patches as required

• Resolve breaking API changes introduced by upgraded libraries

• Update downstream callers directly affected by package upgrades

• Analyze complex dependency relationships and package compatibility issues

Build & Test Troubleshooting

• Diagnose and remediate Go and Bazel build failures

• Troubleshoot existing test failures related to package upgrades

• Investigate compiler, linker, build, test, and runtime failures

• Troubleshoot applicable CI and presubmit failures

• Validate that upgraded packages successfully build and existing tests pass

• Isolate issues introduced by dependency or version changes

Engineering Tools & Automation

• Maintain and troubleshoot Copybara configurations and source synchronization issues

• Use approved internal tools and reusable automation to accelerate dependency analysis and failure triage

• Develop repeatable approaches for investigation, validation, and evidence collection

• Support efficient engineering workflows for large-scale package migration activities

Change Management & Documentation

• Submit review-ready change lists with clear technical rationale and validation evidence

• Document package versions, dependency remediation, validation results, and patch status

• Maintain traceable migration records throughout the upgrade process

• Document and escalate material package deviations and external blockers

• Identify cross-product dependency impacts and communicate them to appropriate stakeholders

Collaboration & Delivery

• Partner with reviewers, engineering teams, and language subject-matter experts

• Communicate technical issues and blockers clearly and proactively

• Provide actionable evidence when escalating complex issues

• Maintain predictable progress against assigned upgrade priorities

• Ensure clean handoffs and capture reusable technical learnings

Qualifications

• 7+ years of software engineering experience

• Strong hands-on Golang / Go development and debugging experience

• Strong understanding of Go modules and semantic versioning

• Experience with transitive dependency resolution and package compatibility

• Strong knowledge of idiomatic Go and API refactoring

• Hands-on experience with Go build and Go test

• Experience with Bazel and large-scale or monorepo-based build environments

• Proven ability to troubleshoot compiler, linker, build, test, and runtime failures

• Experience with Git-based development, code reviews, and change management

• Experience resolving merge conflicts and managing local patches

• Strong Linux and scripting skills

• Strong analytical and problem-solving abilities

• Excellent written and verbal communication skills

• Strong documentation and collaboration skills

• Ability to work independently in a complex engineering environment

Must-Have Skills

• Golang / Go — Mandatory

• 7+ years of software engineering experience

• Go modules and dependency management

• Go build / Go test

• Bazel

• Git

• Linux

• Troubleshooting large-scale build and test environments

• API compatibility and dependency remediation

Nice to Have

• Copybara or comparable source-synchronization tooling

• Large-scale open-source dependency upgrade experience

• Vulnerability remediation or package maintenance programs

• Experience with complex dependency graphs

• Generated code and multi-target changes

• High-impact API migrations

• Building reusable upgrade playbooks or engineering automation

• Experience working within large enterprise monorepos

• CI/presubmit infrastructure experience

Additional Information

• Golang is the highest-priority skill for this position

• Candidates should be able to start within 1-2 weeks

• Relocation candidates are welcome, but must provide confirmation of their ability to work onsite

• Day 1 onsite in Bellevue, WA

• Hybrid schedule with 3 days onsite per week

• Two rounds of technical interviews

• No additional client interview

• Hands-on engineering role;
  candidates should demonstrate recent practical Go development experience

• Target profile: 7-12 years of experience

• Strong preference for candidates authorized to work in the U.S.

• Fast-moving hiring process with an expected profile-closing window of approximately 15-20 days

#RTA

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