Full Stack AI Engineer

We’re building AI-native engineering team within Infinity, a holding company building full-stack AI businesses. We support portfolio companies by:

• Rapidly prototyping new product ideas to validate markets
• Providing flex capacity during high-growth phases
• Maintaining and evolving the Gravity our in house software factory and agent hub that we use to build all software.

We’re not a dev shop. We’re a surgical team of builders who move fast, reduce ambiguity, and create leverage across a network of founders building with AI at the core.

The Role

We’re looking for scrappy, sharp, execution-focused engineers who thrive in high-autonomy environments. You’ll be deployed on fast-moving projects; from validating ideas in one-week sprints to helping scale production tools inside early-stage companies.

This is a contract-to-hire role. If there’s mutual fit, you’ll transition to a full-time or retainer-based role within the core team.

What You’ll Do

• Build working prototypes of agentic AI applications, LLM workflows, and full-stack products
• Experiment quickly across frameworks, open source tools, and low-code stacks
• Interface directly with product thinkers and founders to distill ambiguous ideas into testable code
• Contribute to shared internal libraries and the Infinity Commons and add features to Gravity, our software factory platform.
• Occasionally embed with portfolio companies to support launches or unblock execution

Required:

• Fluency in Python and experience using AI toolkits and APIs
• Experience rapidly building and iterating on proof-of-concept or MVPs
• Comfort using a blend of commercial APIs, open source, and low-code tooling to get things done
• Strong problem-solving skills and analytical intuition

Bonus Points:

• Prior work with AI agents, and a deep familiarity with what it takes to make them work well in production environments.
• Experience with frontend development (React, Next.js, etc.)
• A background in a STEM discipline, data science, or quant-heavy engineering you’ll need to be able to show the impact of your work with statistical significance
• Previous experience in a venture-backed startup or technical founder role