First Engineer: AI Infra, End-to-End Ownership, Remote Europe

Unknown; United States; Remote; USD 90,000 - 157,000; Full time

Job summary

Unknown is an early-stage AI infrastructure startup building scalable infrastructure for AI-powered service businesses. As the first engineer, you will work directly with the founder in a fast-moving, ownership-driven culture, shaping the product and platform from day one.

You will scale the system across backend, infrastructure, frontend, and AI agents, delivering production-grade software and enabling rapid experimentation in a highly autonomous environment.

Qualifications

• 2+ years shipping production software or equivalent founder record.
• Experience running LLM or AI agent systems in production.
• Full-stack range and ability to turn prototypes into dependable systems.

Responsibilities

• Scale architecture to a large user base.
• Build and operate the agent runtime.
• Own projects end to end across backend, infrastructure, frontend, and AI agents.

Skills

Production software

AI/LLM systems

Full-stack

Job description

Unknown is an early-stage AI infrastructure startup building scalable infrastructure for AI-powered service businesses. As the first engineer, you will work directly with the founder in a fast-moving, ownership-driven culture, shaping the product and platform from day one.

You will scale the system across backend, infrastructure, frontend, and AI agents, delivering production-grade software and enabling rapid experimentation in a highly autonomous environment.