Staff SDK Engineer — Cross-Language Dev Tools (Remote)

Speedrun Talent Network; United States; Remote; USD 180,000 - 240,000; Full time

Benefits offered by this job

Remote-first

Equity package (4-year vest, 1-year cl

4 weeks vacation

11 statutory holidays

MacBook Pro + $500 peripherals stipend

Comprehensive benefits

Job summary

Keycard is hiring a STAFF-LEVEL Software Engineer, SDK to own libraries developers use to integrate Keycard across agents and MCP servers. You will work on OAuth, token exchange, and multi-language SDK parity across Python, TypeScript, Go, and Ruby.

You’ll ensure safe defaults, versioning discipline, and robust framework integrations. You’ll collaborate with founders, product, and engineering to ship handwritten and generated clients, maintain releases on PyPI, npm, and RubyGems, and drive

Qualifications

• Shipped libraries or SDKs used by other developers
• API consistency across multiple languages
• Knowledge of OAuth 2.0 and token workflows
• Experience with versioning and deprecations

Responsibilities

• Design APIs keeping cross-language consistency
• Ensure safe defaults and token handling
• Maintain MCP SDK alignment with upstream changes
• Release and publish packages for multiple languages
• Improve developer experience with docs and examples
• Review and guide SDK pull requests

Skills

API design

OAuth 2.0

Multi-language SDKs

Versioning & deprecations

Developer experience

Tools

OpenAPI

PyPI

npm

RubyGems

Go modules

Job description

Keycard is hiring a STAFF-LEVEL Software Engineer, SDK to own libraries developers use to integrate Keycard across agents and MCP servers. You will work on OAuth, token exchange, and multi-language SDK parity across Python, TypeScript, Go, and Ruby.

You’ll ensure safe defaults, versioning discipline, and robust framework integrations. You’ll collaborate with founders, product, and engineering to ship handwritten and generated clients, maintain releases on PyPI, npm, and RubyGems, and drive