Staff ML Engineer, Mental Health AI

Slingshot AI; Greater London; On-site; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Competitive pay

Equity

Travel between NYC and London offices

Office perks: lunch & coffee

Job summary

Slingshot AI is building Ash—the first AI designed for mental health—and seeks a Member of Technical Staff in ML to ship end-to-end models, training infra, harnesses, and evals. You will join a small, highly capable team and own the quality and impact of features—driving real-world outcomes for users and lives.

The role emphasizes hands-on engineering, learning mindset, and collaboration across ML, product, and operations, with offices in London and NYC.

Qualifications

• 3+ years engineering experience shipping production systems.
• Experience with LLMs, fine-tuning, harness engineering, and evals.
• Owns the end-to-end delivery of features and models.
• Thrives in a fast-paced startup environment and values collaboration.

Responsibilities

• Ship models, training infrastructure, harnesses, and evals end-to-end.
• Design, build, and launch ML tech that differentiates Ash for mental health.
• Own value delivery to users and improve production performance.
• Collaborate with a small, highly skilled team and care deeply about code quality.

Skills

LLMs experience

Fine-tuning

Eval loops

Ownership mindset

Tools

SkyPilot GPUs

gRPC

Kubernetes

GCP

Next.js/TypeScript

Rust

Dart/Flutter

Job description

Slingshot AI is building Ash—the first AI designed for mental health—and seeks a Member of Technical Staff in ML to ship end-to-end models, training infra, harnesses, and evals. You will join a small, highly capable team and own the quality and impact of features—driving real-world outcomes for users and lives.

The role emphasizes hands-on engineering, learning mindset, and collaboration across ML, product, and operations, with offices in London and NYC.