About Us Our mission is to make healthcare reimbursement transparent and fair (/phare), so providers can spend more time caring for patients and less time haggling over costs. We specifically focus on the most complex AI challenges that require novel R&D, with a team that blends AI researchers and engineers with clinicians, and payment experts. Backed by top healthcare investors including General Catalyst, we’re scaling quickly - join us!

The Role You’ll own the architecture, training, and optimization of large-scale transformer-based pipelines, wrangling PyTorch, GPUs, and distributed infrastructure to push forward SOTA. Think “research lab rigor” fused with “startup shipping speed.” Expect to:

• Design and iterate on new transformer and hybrid text architectures; scale promising ideas across multi-GPU / multi-node clusters with PyTorch.
• Drive the research roadmap: propose experiments, benchmark against state of the art, and publish or open-source meaningful advances.
• Build retrieval-augmented generation (RAG) pipelines and lightweight agent workflows, balancing accuracy, latency, and cost.
• Convert research prototypes into reliable services with CI/CD, monitoring, and rollback.
• Partner with product and design to translate model capabilities into intuitive user experiences.

Who We’re Looking For

• 3+ years training large transformer models in Python/PyTorch at scale.
• Peer-reviewed publications or significant open-source work in text modelling. Proven end-to-end ownership: architecture → distributed training → deployment.
• Fluency with Lightning/FSDP, Pytorch, Hugging Face, WandB, Ray/Kubeflow, Docker
• Deep expertise in text modelling; clinical-text knowledge not required.

Bonus points

• RLHF or policy-optimisation methods (PPO, TRPO, DPO).
• Familiarity with healthcare ontologies or claims data.

Benefits

• Top-of-market compensation ($150-220k salary depending on seniority + equity)
• Flexible PTO & hybrid culture (SoHo HQ 3 days/wk; exceptional remote considered)
• Generous vacation policy, bonus birthday day-off, work from anywhere 1-month per year
• Mission-driven, collaborative team with twice-a-year offsites and regular outings
• Twice-yearly team off sites to align, build, and celebrate
• 401(k) retirement plan with contribution match up to 3%
• ICHRA flexible health insurance plan to meet individuals' needs

Hiring Process

• Initial application.
• Intro call: Discuss your background, career goals, and our mission.
• 2 x Technical interviews: A programming or system design exercise focused on real-world data challenges.
• Referees: We ask for 2 referees who can speak to your professional/technical work
• Culture interview: Ways of working, and a chance to ask questions
• Offer