Software Engineer, AI

At Sixfold, we’re building the AI platform that transforms how insurers evaluate and price risk. Not just another tool that generates summaries or flags issues—we're creating AI agents that actually understand risk the way veteran underwriters do. Our platform is processing billions in premium for some of the world's largest carriers, and we're just getting started.

The technical challenges are wild. We're teaching AI to understand that a bakery in Florida faces different risks than one in Montana. To know when a manufacturing company's pivot from toys to medical devices fundamentally changes their risk profile. To make million-dollar decisions with the same intuition as someone who's been underwriting for 20 years.

What makes Sixfold special isn't just the technology—it's that we're building it with people who deeply understand insurance. Our team includes folks who've built and scaled carriers, researchers who've pushed the boundaries of AI, and engineers who just love solving seemingly impossible problems.

We're still early, but the impact is already real. If you want to build AI that matters—that affects real businesses, real people, and billions in economic activity—Sixfold is where you should be. We're not just digitizing insurance. We're reimagining what it can be.

• A smart self-starter
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  You have a bias for action. You orient yourself around solutions and outcomes and don’t wait for others to tell you what to do. But you also understand how to build alignment and conviction for a decision that can’t be taken back easily.
• A force multiplier: You look for ways to magnify your impact and your team’s. When you find a productivity hack, you share it with your teammates and build a tool to make it easier. You document knowledge for the benefit of future teammates. And you lean into AI and automation to improve your productivity.
• An empathetic communicator: You communicate nuanced ideas clearly, whether you're explaining technical decisions in writing or brainstorming in real time. In disagreements, you engage thoughtfully with other perspectives and compromise when needed.
• A learner: You thrive on learning new things. You can name your favorite sources of what’s new in tech and AI, and you’re excited to tell us about your latest hack or discovery.

As a software engineer at Sixfold, you will:

• Build and deliver quality software. You will write, test, and deploy code across our AI pipeline using Python and a variety of generative AI and other machine learning tools & techniques. You'll work with large language models, fine-tune prompts, design evaluation metrics, and implement responsible AI practices. You’ll work on team-level projects, applying engineering best practices and contributing to the team’s technical decision-making.
• Grow as a full-stack developer. You'll have opportunities to build features end-to-end by expanding your skills with Ruby on Rails and React Type Script. You'll collaborate with our product engineers to understand our tech stack and how AI capabilities integrate with our web app and APIs.
• Collaborate with cross-functional partners. Our teams include product managers, designers, and engineers working together to accomplish shared goals. You will collaborate with these partners, beginning with problem discovery through solution design and delivery. We work in two-week cycles and release to production at least once a week.
• Own your software through its entire lifecycle. In addition to shipping code, you will assess our most pressing product and engineering problems, identify and design solutions, write technical specs, and scope and break down projects. You will also spend approximately one week per quarter on call, serving as the first line of defense against service outages and critical bugs. If you don’t have experience with all of this yet, don’t worry - we’ll teach you!

• You have 3+ years of professional software engineering experience
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• You are familiar with Python and FastAPI and know their patterns well enough to build features and APIs without significant learning time. Extra credit if you have experience with Pydantic, Notebooks, or…