Full Stack AI Engineer

AI Engineer (Contract-to-Hire) Location: Remote (Global, EST working hours) Start Date: Rolling 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 What We're Looking For 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 How We Work Asynchronous by default, with tight feedback loops and clear ownership High-trust, high-autonomy culture that values shipping, learning, and iterating Small, elite team of senior builders with experience across AI, product, and infrastructure How to Apply Send us: A short note in the application form on why this role fits you Links to past work, projects, or GitHub. Availability to start the contract phase We'll move quickly. If it feels like a fit, you'll be coding real things with us within a week. Infinity Constellation