Senior Full-Stack Engineer

Manta Cares•San Francisco, CA

6d•$170,000 - $230,000

About The Position

Manta Cares is a digital health company founded and led by cancer patients, survivors, caregivers, and oncologists. Its AI patient platform supports cancer patients and their families through the many decisions they face, and the company partners with life sciences companies and healthcare systems. The Senior Full-Stack Engineer is a senior individual contributor on a small engineering team. The role focuses on improving Hope, Manta Cares’ AI companion, and the Notebook, where patients keep notes and medical documents and track appointments and symptoms. The engineer will take features from rough specifications through implementation and release across the stack, collaborating closely with product, design, and clinical teams. The position reports to the Head of Product Development. The work includes connecting Hope and the Notebook, building and evaluating production LLM features, evolving conversation state and data models, and contributing to shared backend systems and engineering practices. The team values thoughtful architecture, product quality, experimentation, and engineers who contribute across the stack.

Requirements

At least 5 years of product engineering experience, including shipping user-facing features end to end and designing or scaling systems.
Full-stack TypeScript experience from browser to API, including hands-on experience with React and Node.js API servers.
Experience building LLM features in production products, such as chatbots, agents, or streaming features, and understanding of production risks.
Ability to independently own and build significant full-stack projects, taking ambiguous requirements to a shipped product with minimal specifications and close collaboration with product and design.
Strong data-modeling and systems-architecture skills, including relational schema design and migrations.
Experience designing and deploying cloud applications.

Nice To Haves

Python experience.
Mobile or hybrid app experience, including Capacitor or React Native, and shipping apps to app stores.
Experience in healthcare or privacy-sensitive domains, such as HIPAA.
Terraform or DevOps experience.
Experience with Postgres and AWS.

Responsibilities

Own and ship end-to-end features, including UI, APIs, data models, tests, and releases, then track patient usage to inform future work.
Connect Hope AI and the patient Notebook so Hope can help patients manage information related to their cancer journey.
Build new LLM features, improve Hope’s answers, roll out model upgrades, and create evaluations that detect regressions.
Build persistent shared conversation state and modernize Postgres migrations and database tooling.
Contribute to Hope’s core AI agent, code review, engineering standards, and agentic development tools and patterns.
Strengthen shared backend systems, including GitOps infrastructure, database migrations, authentication, jobs, and pipelines.
Collaborate with product, design, and clinical teams to take ambiguous requirements through to shipped product.