Job Title: Senior Backend Engineer

Company Name: Magical

Job Url: https://jobs.ashbyhq.com/Magical/ca1701ba-5ed3-4ea7-b358-6f4284940c1c?utm_source=Otta

Job Description: About the Role

As a Senior Backend Engineer on the Agent Platform team, you'll build the foundational systems that power our AI agents—from agent orchestration and state management to model integration and evaluation pipelines. This is platform engineering: building the infrastructure that enables our team to ship reliable, production-grade agentic automation.

You'll work at the cutting edge of multi-agent systems, designing how agents collaborate to solve complex healthcare workflows. You'll own critical backend services end-to-end and build the verification systems and evaluations that guarantee our agents do the right thing every time.

This is a hybrid role with 3 days per week in our San Francisco office.

In this role, you will

• Design and build core platform systems for agent orchestration, memory, and state management

• Develop robust infrastructure for integrating and evaluating the latest AI models at scale

• Build APIs and abstractions that enable teams to quickly ship new agent capabilities

• Own critical backend services from architecture through deployment and monitoring

• Work directly with the founding team to shape the architecture of our agentic platform

Your background looks something like this

• Have 4+ years of backend engineering experience, with strong proficiency in TypeScript/Node

• Deep understanding of distributed systems, databases, and asynchronous architectures

• Strong bias towards action and embody "show > tell"—you ship systems and iterate quickly

• High degree of agency: you effectively prioritize, unblock yourself, and drive projects forward without much outside input

• Value taking ownership and responsibility for your systems and infrastructure

• Studied Computer Science (or related field), or dropped out to build stuf