Founding Engineer

_What if you got to build the technical foundation of the company redefining health and longevity?_

About Helios

Helios is the human enhancement company. Almost all of medicine today is reactive, which means it waits for disease to appear and then tries to treat whatever shows up. We think the interesting problem is the opposite one: seeing trouble early enough to do something about it. That takes a kind of data the healthcare system has never collected, and we decided the only way to get it was to build the instrument ourselves. No one has built this before, and we think it is the largest opportunity in healthcare: the chance to build what medicine should have been all along.

That instrument is an at-home panel measuring over 1,000 biomarkers from a single draw, which makes it the highest-resolution at-home diagnostic available anywhere. The test is where we start, not where we stop. Around it we are building the brand, the platform, and the products that we expect will make Helios a household name in health, the company millions of people trust to live longer and better. Each draw becomes part of a longitudinal dataset connecting a member's biomarkers with their wearable data, their labs, their records, and how they actually live. We use that dataset to train the Helios Foundation Model (HFM), our path to medical superintelligence. Today, the HFM simulates physiology and predicts disease risk, and the HFM will soon design interventions outright. The first of those interventions go on sale this year, and every one we sell will send outcome data back into the model.

The three founders are Harvard Medical School physician-scientists (two of us helped pioneer CRISPR diagnostics) with backgrounds running from longevity research and computational biology through clinical practice and drug development. We are well-capitalized, and we are building a consumer company first. Roon ([takeroon.com](http://takeroon.com)), our cognitive performance pouch, is the first of those products and is live now; the store, the funnel, and the systems behind it are part of what you would own. The products fund the data, the data compounds into models no competitor can train, and those models become our deepest moat. We are not improving the healthcare that exists. We are reinventing it, building a new kind of platform and the company that millions of people trust to monitor and run their health.

The role

The model is the moat, and the model is only as good as the systems it lives in. You would be one of the first employees, and the only person whose full-time job is engineering. Everything technical runs through you: the models, the infrastructure they live on, the security that wraps them, and the product a member actually touches. In practice you would operate as our technical lead from the first day, and the role should grow into formal leadership as the team does.

We can cover the clinical and scientific side ourselves, since that is where the three of us have spent our careers. What we need is the person who turns the science into systems that survive contact with production. There is no lane to stay inside here, and whatever the company needs built next is yours to build.

What this role is not: a management job. For now there is no team to manage and no process to run, and the work is building the thing rather than overseeing the people who do. The seat can grow into technical leadership over time, but it starts hands-on and stays that way for a long while.

What you'll own

1. The website and member product

The core of the job is building the platform for the test: the website where someone learns what Helios is and orders a kit, and the member product on web and mobile where they connect their wearables and records and read what their results mean. That includes the report, the product's moment of truth, which has to be legible, honest about uncertainty, and beautiful enough that people screenshot it. You build the LLM