Senior/Staff Software Engineer

The role

A generalist engineer will connect Stream to existing apps, services, and AI tools. You will own the integration layer end to end and work directly with the founders.

What you will do

• Build integrations between Stream and the apps, services, and AI tools people already use
• Design how tools plug into Stream’s agent
• Own the integration layer end to end
• Build and operate MCP servers and clients in production
• Work out reliable integrations for software without clean APIs
• Instrument every integration so breakage is caught before users notice
• Carry a share of the core backend and its on-call rotation

Required qualifications

• 5+ years building software
• Strong Python
• Comfort owning a live, real-time service
• Shipped third-party integrations in production: OAuth 2/OIDC, token refresh and revocation, webhooks, API versioning, and vendor quirks
• Understand software architecture well enough to work with applications you didn’t write
• Integrated tools into an LLM agent that real users depend on, and been accountable for actions completing
• Hands-on MCP experience
• Generalist range across backend, auth, client code, and agent logic
• Product sense for software that acts on someone’s behalf, including when the user isn’t looking at a screen
• Communicate precisely and make tradeoffs explicit

Nice to have

• Connector or plugin work at an AI product
• Browser automation (e.g. Playwright, Chrome DevTools Protocol)
• Integration security: scoped credentials, secret storage, prompt-injection defenses, audit logging
• Voice or multimodal assistant experience
• Developer documentation other engineers have built on

Benefits

• Health, vision, and dental benefits
• Company-sponsored 401(k)
• Unlimited PTO and sick time
• Early stage equity

About the company

Sandbar is an interface company in New York City. Their first product is Stream, a private voice ring.