On-Device AI Engineer: Build Agents & Backends

Nothing; San Francisco (CA); Hybrid; USD 159,000 - 242,000; Full time

Benefits offered by this job

Remote work option

Job summary

Nothing in San Francisco is hiring a software engineer to turn models into practical agents across devices. The role is hands-on with a backend-first approach, shipping features from prototype to reliable product and collaborating with on-device AI engineers.

You will build backend services, APIs, and cross-device synchronization, own end-to-end tasks, and continuously improve through testing and real-user tasks. Remote option in SF region.

Qualifications

• You've shipped working software: at a job, in your own projects or in open source.
• A backend-first mindset: services, APIs, concurrency, storage and how data moves through a system.
• You've built with LLMs or agents, or can show us you'd pick them up fast and use them on a real problem.
• You can take a vague idea and turn it into something that works.
• You learn by building, testing and breaking things.
• You like small teams where everyone builds.

Responsibilities

• Build agents that use tools, data and app capabilities to finish real tasks.
• Build the backend they run on: services, APIs, storage, and sync between devices and the cloud.
• Solve the hard backend problems: concurrency, state and data flow across services and devices.
• Work with our on-device AI and systems engineers to plug agents into the platform.
• Write evals against real tasks, chase down every failure and ship the fix.
• Own the task end to end, frontend included.
• Build with coding agents every day, and know when your own judgment should win.

Skills

Shipped software

Backend-first

LLMs/Agents

Turn vague ideas into working products

Learn by building

Small teams

Job description

Nothing in San Francisco is hiring a software engineer to turn models into practical agents across devices. The role is hands-on with a backend-first approach, shipping features from prototype to reliable product and collaborating with on-device AI engineers.

You will build backend services, APIs, and cross-device synchronization, own end-to-end tasks, and continuously improve through testing and real-user tasks. Remote option in SF region.