D
AI

Machine Learning Engineer

Delty (YC X25) · San Francisco, CA

Actively hiring Posted 6 months ago

About Us
Delty is building the healthcare’s AI operating system

. We create voice-based and computer-based assistants that streamline clinical workflows, reduce administrative burden, and help providers focus on patient care. Our system learns from real healthcare environments to deliver reliable, context-aware support that improves efficiency and elevates the provider experience.

Delty was founded by former engineering leaders from
Google, including co-founders with deep experience at YouTube and in large-scale infrastructure
. You’ll get to work alongside people who built massive systems at scale — a chance to learn a
lot
and contribute meaningfully from day one.

We believe in solving hard problems together as a team, iterating quickly, and building software with long-term thinking and ownership.

What You’ll Do

  • Build and own production machine learning systems end-to-end: from data modeling and feature engineering to training, evaluation, deployment, and monitoring.
  • Design and implement data pipelines that turn raw, messy real-world healthcare data into reliable features for machine learning models.
  • Train and evaluate models for ranking, prioritization, and prediction problems (for example, identifying high-risk or high-priority cases).
  • Deploy models into production as reliable services or batch jobs, with clear versioning, monitoring, and rollback strategies.
  • Work closely with backend engineers and product leaders to integrate machine learning into real workflows and decision-making systems.
  • Make architectural decisions around model choice, evaluation metrics, retraining cadence, and system guardrails — balancing accuracy, explainability, reliability, and operational constraints.
  • Collaborate directly with founders and engineers to translate product and operational needs into scalable, maintainable machine learning solutions.

What We’re Looking For

  • At least 3 years of experience building and deploying machine learning systems in production.
  • Strong foundation in machine learning for structured (tabular) data, including feature engineering, regression or classification models, and ranking or prioritization problems.
  • Experience with the full machine learning lifecycle: data preparation, train/test splitting, evaluation, deployment, retraining, and monitoring.
  • Solid backend engineering skills: writing production-quality code, building services or batch jobs, and working with databases and data pipelines.
  • Good system design instincts: you understand trade-offs between model complexity, reliability, latency, scalability, and maintainability.
  • Comfort working in a fast-paced startup environment with high ownership and ambiguity.
  • Ability to clearly explain modeling choices, assumptions, and limitations to non-machine-learning stakeholders.

Bonus

  • Experience working with healthcare or operational decision-support systems.
  • Experience building or integrating LLM systems in production, such as retrieval-augmented generation, fine-tuning, or structured prompting workflows.
  • Prior startup experience or founder mindset — we value ownership, pragmatism, and bias toward shipping.
  • Experience with model monitoring, data drift detection, or ML infrastructure tooling.

Why join

  • Learn from seasoned Google engineers: As former Google engineers who built systems at YouTube and Google Pay, we’ve operated at massive scale. Working alongside us gives you a chance to build similar systems and learn best practices, scale thinking, and software design deeply.
  • High impact: At a small but ambitious team, your contributions will influence architecture, product direction, and core features. You will have real ownership and see the effects of your work quickly.
  • Grow fast: We’re iterating rapidly; you’ll be exposed to the full stack, AI/ML pipelines, system architecture, data modeling, and product-level decisions — a fast-track to becoming a senior engineer or technical lead.
  • Challenging and meaningful work: We’re tackling the hardest part of software engineering: bridging AI-generated prototypes and robust, scalable enterprise-grade systems. If you enjoy thinking deeply about systems and building reliable, maintainable foundations — this is for you.

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