We're hiring a Senior Software Architect for a fully funded SaaS startup in Boulder, CO — but only if you've already done the job at a senior/staff level. Deep C# expertise required; small team, AI-accelerated build process, real ownership from day one. No C2C offers please and candidates who require sponsorship will not be considered.

Senior Software Architect — Boulder, CO (Hybrid, Direct Hire)

Our client is a fully funded SaaS startup building an enterprise task-governance platform from the ground up — and they need a true senior architect to help build it.

This isn't a growth role. They want someone who has already operated as a senior/staff-level architect, not someone stepping into the title for the first time.

What makes this different: the engineering team is staying small on purpose. AI-driven accelerators and an internal Design System → IDE pipeline are automating a growing share of implementation, so architects here spend more time writing and owning code — not managing a large team.

What you'll do:

• Own the core architecture for a B2B SaaS platform built for scale
• Work directly with founders and leadership on foundational technology decisions
• Build with AI-accelerated tooling instead of a traditional-sized dev team
• Set the technical bar as one of the company's first architects

What you need:

• Expert-level, hands-on C# — required, no exceptions
• Proven track record as a senior/staff-level software architect, ideally in B2B SaaS
• Cloud-native architecture experience
• A plus: experience building AI features into business applications, or WebAssembly

Compensation is market rate for Boulder. Hybrid — 3 days/week onsite.