AI Engineer

Tiny Health is advancing lifelong health, from the first 1,000 days to the last, and addressing chronic disease through precision microbiome science. Founded in 2020 and built by microbiome scientists and physicians, our testing platform reveals whether your microbiome is trending toward resilience or imbalances using shotgun metagenomics, proprietary AI, and one of the world's largest longitudinal datasets. Trusted by families and health practitioners alike, our research-backed gut and vaginal tests are redefining the microbiome as a cornerstone of personalized health through every life stage. Learn more at tinyhealth.com and poweredbytiny.com.

We are looking for an AI Engineer to join our Product & Engineering team. This role will focus on building and scaling production-grade AI systems that power Tiny Health’s consumer and clinician-facing products. You’ll work closely with our co-founder, product/design lead, and a small, high-performing engineering team to design and implement AI-driven features, pipelines, and infrastructure that drive meaningful health insights.

We are seeking someone who has hands-on experience deploying AI applications in production, beyond prototypes or personal projects. You should be comfortable owning end-to-end delivery — from model integration to infrastructure — and capable of operating independently in a fast-moving environment.

If you’re at the lead level, you’ll also help shape Tiny Health’s AI roadmap, set technical direction, and mentor engineers as we expand our AI capabilities.

• Design, build, and maintain production-grade AI systems and APIs that power our products.

• Integrate and fine-tune models (LLMs, embeddings, or other ML architectures) for customer-facing and internal use cases.

• Own the full lifecycle of AI features — from research and prototyping to productionization, deployment, and monitoring.

• Collaborate closely with engineering, product, and science teams to scope and ship impactful AI-driven features.

• Design data pipelines, retrieval systems, and scalable infrastructure for inference and model serving.

• Ensure performance, observability, and reliability of AI components in production.

• (Depending on experience) Lead AI initiatives, guide architecture and system design decisions, and mentor other engineers.

• Proven experience building and deploying AI or ML systems in production at scale (not just prototypes or demos).

• Deep understanding of model integration workflows — from inference pipelines to prompt engineering, fine-tuning, or RAG setups.

• Strong backend engineering background (Python or Node.js preferred).

• Experience designing AI architectures (e.g., hybrid retrieval systems, multi-model orchestration, or embeddings).

• Experience with AWS cloud infrastructure and data pipelines.

• Solid grasp of API development and system architecture for scalable applications.

• Comfortable working independently and driving execution in a startup environment.

• Experience integrating LLMs into production products (OpenAI, Anthropic, Vertex AI, etc.).

• Familiarity with vector databases (e.g., Pinecone, Weaviate, FAISS, Chroma).

• Experience with observability, monitoring, and evaluation for AI systems.

• Experience leading projects or mentoring engineers.

• Prior experience in healthtech, biotech, or working with sensitive health data.

• A mission that actually pulls people in
  Most people here could be doing something easier. They’re not, because this work makes the microbiome measurable and actionable at every life stage — and the results land on real people who write in to tell us that we are life-changing to them. That feedback loop is the perk. It’s not just a job.

• Remote-first, real overlap
  We’re a very diverse, international team, although we only hire FTEs in North America. Core hours are 9am–6pm CST, shiftable by up to two hours either way — start at 7am or 11am, wrap at 4pm or 8pm. Pick your window; just be findable in it.

• Written first, huddle second, meet last
  Default to a clear Slack post: say whether you need a decision, an approval, or nothing at all. When a thread starts ping-ponging, jump into a huddle — ten minutes of voice beats forty of paragraphs. Meetings are the expensive option, so each one needs a decision to make, a preread or strawman sent ahead, and only the people who can actually make that call.

• Fast, but never sloppy
  We ask “how do we do the two-month thing in two weeks?” — and then we check the work. We’re a health company: results, science, and anything a customer or practitioner touches get a second set of eyes, always. Moving fast and being careful aren’t in tension here; shipping errors isn’t speed, it’s rework.

• Shape what we build, not just how we build it
  There’s no playbook waiting for you — you’ll write it, and that’s most true the more senior you are. Ideas get judged on whether they’re executed right, not on who raised them, and the person closest to the problem is usually the one who should be proposing the fix. Bring the alternative, not just the objection.

• Day One mentality
  Fewer titles, fewer layers, fewer moving parts. Real process exists where it counts — data, lab, science, compliance, money — and we follow it, but process is a guardrail, not a destination. Process bloat is never the reason something didn’t ship.

• No hidden agendas
  Transparency mean you’ll always understand how decisions are being made, especially at the top. We spend less time on politics and more on impact. Numbers, misses, and hard calls get shared openly. Feedback works the same way: in real time, not stockpiled for a review cycle. It’s a no-surprises culture: you should always know where you stand, and if you don’t, ask.

• High standards, genuinely fun people
  Our CEO has been described as goofy but serious, direct but likable — and that sets the temperature. We take the work seriously and ourselves much less so. High-performing and fun to be around isn’t a contradiction; it’s the hiring bar.

• Is this pace for you?
  We’re a venture-scaled company on a steep trajectory, and the pace is part of the job. There’s no deep bench to absorb the overflow, which is exactly why the scope here is bigger than it would be anywhere else at your level. We protect flexibility fiercely — more than half of us have kids — and ask for intensity in spikes, not as a constant grind. There’s no defined ladder. Perform, and you’ll move faster here than anywhere else.

1. Learn Fast, Get Better - Find the root cause, not just the fix, and get better every time

2. Be Relentlessly Resourceful - Dig for the answer, move fast, and know when to ask for help

3. Think Like an Owner, Act with Urgency - Act like it’s your company, and do whatever it takes to win

4. Act with Honesty and Empathy - Say what’s true, and say it with care

5. Delight People by Anticipating Their Needs - Solve the problem, then get two steps ahead of it