Founding AI Engineer: Build AI-Driven Web Apps & MVPs

flint; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Flint is seeking a product-first engineer to design and deploy AI-powered web experiences, employing prompt engineering and multi-agent architectures. You will implement production-grade agentic systems and work across frontend, backend, and infrastructure.

You will lead RAG workflows, strengthen evals and observability, and shape architectural decisions while shipping MVPs and iterating rapidly based on user feedback.

Qualifications

• Product-first engineer with hands-on AI product deployment.
• Experience with prompt engineering, context optimization, and model fine-tuning.
• Strong full-stack skills with AI integration in web apps.
• Ownership mindset and quick learning in fast-paced settings.

Responsibilities

• Design and build production-grade AI-powered web experiences.
• Architect and optimize RAG systems with context engineering.
• Improve engineering processes with robust evals, observability, and testing.
• Develop and maintain the core frontend, backend, and infra.
• Shape technical vision and lead architectural discussions.
• Create prototypes to gather rapid user feedback.

Skills

Product-first engineer

AI product deployment

Prompt engineering

Context optimization

Model fine-tuning

Full-stack AI

Cursor Windsurf

Ownership mindset

Fast-paced environment

MVP development

User feedback iteration

Tools

Cursor

Windsurf

Job description

Flint is seeking a product-first engineer to design and deploy AI-powered web experiences, employing prompt engineering and multi-agent architectures. You will implement production-grade agentic systems and work across frontend, backend, and infrastructure.

You will lead RAG workflows, strengthen evals and observability, and shape architectural decisions while shipping MVPs and iterating rapidly based on user feedback.