Founding Senior AI Engineer – Drug Discovery & Healthcare AI ( Equity

Bactrix is looking for a Founding Senior AI Engineer to help shape the core technology behind an AI-driven drug repurposing platform for antimicrobial resistance (AMR) - one of the most urgent, underfunded problems in global health.

This is a hands-on, high-ownership role for someone who genuinely loves building - not maintaining, but inventing. You'll work directly with our founder and science team to push the platform's discovery engine, agent architecture, and reasoning pipeline forward, finding smart, low-cost ways to make the system more capable without needing big infrastructure or big budgets.

• Architect and improve our multi-agent AI pipeline (LLMs, RAG, agent orchestration) for pharmaceutical/biomedical discovery.
• Find creative, resource-efficient ways to increase model capability and accuracy without expensive infrastructure.
• Collaborate directly with our science team to ensure AI outputs are scientifically grounded and trustworthy.
• Help define technical direction and architecture as a founding-level technical voice, not just an execution hire.

• Genuine expertise in AI/ML, LLMs, and agentic systems - someone who can innovate, not just implement.
• Experience in or strong familiarity with pharma, biotech, or life sciences applications of AI.
• Comfortable operating lean - building smart, cost-efficient solutions at an early-stage startup, not enterprise-scale budgets.
• A founder mindset: ownership, initiative, and genuine belief in the mission.

• Remote
• Equity-based compensation at this stage (pre-seed); cash compensation and equity terms to be discussed as funding is secured
• Flexible but meaningful weekly commitment