Senior Software Engineer

CloudCrane lets a person ask their assistant (Claude, ChatGPT, or any that connects to MCP) for a small app (a habit tracker, a spending log, a packing list) and have it land on their phone's home screen. The assistant writes the app and publishes it through our MCP server; we check it, keep every version, and serve it at its own address, where it installs, opens full screen and works offline. What the person saves stays on their phone.

This role owns whole slices of that, not tickets. You'll take something that is still a sentence ("an update must never lose what someone saved") through the MCP tools, the service, the database, the apps host and the tests until it holds on a real phone.

What you'll do

• Build and extend the app MCP: the tools an assistant sees, what each grant may do, and the errors that tell an assistant how to fix what it sent
• Own the checks an app passes before it's published, and the warnings kept with each version
• Keep the apps host honest: one answer per address, worked out once and served the same here and at the edge
• Review others' work for correctness, races and the failure modes a passing test suite misses

What we need

• Five or more years building production backends, with real ownership of something that had users
• TypeScript at depth, or another statically typed language you'd pick this up from quickly
• Strong SQL, and a reason for every place you'd enforce a rule in the database instead of in code
• You write tests as part of building, and can say what each one would catch
• You've debugged a race condition in production and can describe how you proved the fix

Nice to have

• You've built against the Model Context Protocol, or another protocol strangers' clients call
• Progressive web apps, service workers and their update edge cases
• Cloudflare Workers or another edge runtime

How we hire: a 30-minute call about something you've built; a working session on a real problem from this codebase; a conversation about decisions when the evidence is thin; references, then an offer. No puzzles, no unpaid project work, and we aim to answer within a week at every stage.

More: https://cloudcrane.ai/careers/senior-software-engineer/