Member of Technical Staff (Machine Learning)

Location: London, United Kingdom; the role involves working in person with a small team and travel between the London and New York offices.

Company

hirify.global develops Ash, an AI product designed for mental health, with a mission to make support more accessible.

What you will do

• Ship machine-learning models, training infrastructure, harnesses, and evaluation systems end to end.
• Design, build, and launch technology that differentiates Ash as a specialized mental-health model.
• Improve a model-agnostic post-training engine running on a leased-GPU cluster managed by SkyPilot.
• Develop auto-research loops, mental-health-focused evaluation indexes, and feedback loops based on production performance, psych research, and scalable data sources.
• Own systems and deliver high-quality products that create value for users.

Requirements

• 3+ years of engineering experience owning systems that other people rely on.
• Experience working with LLMs, ideally including fine-tuning, harness engineering, and evals.
• Proficiency in using agents to support research and implementation.
• Ability to take ownership, work collaboratively and directly, and maintain a high standard of quality.
• Experience in a fast-paced startup, or the drive to thrive in one.
• Willingness to work in person with a small team and learn unfamiliar tools as required.

Nice to have

• Specific expertise across the listed application, backend, infrastructure, cloud, or media-streaming technologies is not required; a learning mindset is valued.

Culture & Benefits

• Autonomy, flexibility, and support within a small, highly skilled team.
• Competitive compensation at the top of the personal market and meaningful equity.
• Travel between the London and New York offices.
• Free lunch and coffee in the office, plus a generous learning budget.
• Personal therapy covered.