Founding Software Engineer (AI / Full Stack) Full Time

Capsule AI builds agentic strategy infrastructure for life sciences. We convert the world’s unstructured science into decisions our customers can act on — through purpose-built models, proprietary data, and embedded workflows. We’re deployed across global top-10 pharma, top-3 med device, mid-size biotech, consulting firms, and institutional investors.

We’re a small, fast-moving team. Both roles below are early hires with real ownership and a clear path to grow as the company scales.

The Basics: Full-time · 3+ years experience · Remote (East Coast hours)

About the role

You’ll be a founding engineer building the core systems behind Capsule AI, including the agentic infrastructure, data pipelines, and applications that turn unstructured science into traceable, decision-ready outputs for life sciences teams.

This role is deliberately flexible with room to lean toward AI/agentic work or full-stack product work depending on your strengths and interests. You’ll have end-to-end ownership of significant features, work directly with Capsule’s GTM team to understand real gaps, and ship quickly. Our stack includes purpose-built models (scientific OCR, domain embeddings, voice model), knowledge graphs, a multi-agent orchestration layer, and customer-facing workflow applications.

What you’ll do

• Design, build, and own significant features across the stack, from data pipelines and APIs through to the interfaces customers interact with.
• Build and optimize agentic systems: planning, tool use, retrieval, and evaluation, leveraging our proprietary life sciences data and models.
• Take projects end-to-end, from ambiguous problems through production deployment, ensuring reliability, scalability, and accuracy.
• Opportunities for forward-deployment with Top 10 pharmas.
• Work directly with internal teams to refine product capabilities based on real feedback.
• Contribute to engineering best practices around testing, observability, and security

What we’re looking for

• 3+ years of professional software engineering experience as a generalist comfortable working across the stack.
• Strong fundamentals and proficiency in Python and TypeScript (or similar). 
• Experience with LLM and agentic systems (retrieval, tool use, evals, agent loops)
• Evidence you ship: side projects, open source, anything that shows the work is real. A track record of shipping impactful features with high attention to reliability and detail.
• Comfort with ambiguity. We don’t have a PM; you help to define requirements

Nice to have

• Previous experience at high-growth startups (Pre-seed, Seed, Series A)
• Experience training or fine-tuning ML / deep learning models.
• Demonstrated interest in life sciences (bio, chem, pharma)
• CS / computer engineering degree or equivalent experience.

What we offer

• Competitive salary, meaningful equity, full health benefits, 401k with matching.
• Daily lunch stipend and perks on request
• Take what you need vacation policy
• In-person retreats 
• Work at the frontier of agentic AI, on systems that shape how life sciences teams make high-stakes decisions.
• Direct collaboration with the Capsule AI co-founders who previously worked at Google, Meta, Amazon, NVIDIA, and start-ups.
• A fully remote team across San Francisco and New York. This role works East Coast hours; we prefer candidates based in New York, Boston, or Toronto.

Capsule AI is an equal opportunity employer. We welcome candidates of all backgrounds and do not discriminate on the basis of race, religion, color, gender identity or expression, sexual orientation, national origin, age, marital status, veteran status, disability, or any other characteristic protected by law.