AI Engineer - Backend

AGI, Inc.; San Francisco (CA); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Competitive cash and meaningful equity

Top-tier relocation and immigration support

Job summary

AGI, Inc. in San Francisco is seeking a backend engineer to develop systems for their AI agents. This role focuses on ensuring reliability, observability, and performance of backend operations in a high-scale environment.

Ideal candidates will have a strong background in designing and maintaining backend systems, particularly for AI and LLM-powered applications. Competitive salary and relocation support are offered.

Qualifications

• Experience in building reliable backend systems.
• Ability to ship meaningful changes quickly.
• Familiarity with systems involving high concurrency.

Responsibilities

• Own the end-to-end agent backend.
• Ensure production SLAs and reliability.
• Design infrastructure for agent operations.

Skills

Backend design for LLM-powered systems

Observability and incident response

Postgres and caching systems

Integrating backend systems

Capacity planning

Job description

Think Different. Build the Future.

Our Mission

Build everyday AGI. Trustworthy, consumer-grade agents that redefine human–AI collaboration for millions. Software shouldn’t wait for commands; it should partner with you, amplifying what you can do every single day.

Why AGI, Inc.

We’re a stealth team of elite founders and AI researchers, with backgrounds spanning Stanford, OpenAI, and DeepMind. We’re industry leaders in mobile and computer-use agents, bringing these capabilities to consumer scale.

Grounded in years of agent research, our AI is designed with trustworthiness and reliability as core pillars, not afterthoughts.

We are supported by tier-1 investors who funded the first generation of AI giants; now they’re backing us to build the next: everyday AGI. (Watch the demo)

If you see possibility where others see limits, read on.

Build the systems our agents run on. Make them feel like magic, not infrastructure.

Our agents are only as trustworthy as the backend behind them. Every API call, every retry, every queued job is the difference between an agent that feels alive and one that feels like a chatbot. You'll own the systems that turn research into product — model orchestration, agent state, partner integrations, the data plane — and you'll make them fast enough, observable enough, and boring enough that the rest of the team can ship without thinking about them.

This is for the backend engineer who has been the on-call hero before, who has strong opinions about queues and idempotency, and who wants to design infrastructure for a product where the floor is "millions of devices."

Tasks you will own

• The agent backend end-to-end — model orchestration, tool-use plumbing, agent state, retries, observability
• The data plane behind every agent action — Postgres schema, caching, queues, event streams — at OEM scale
• Production SLAs, on-call, and the reliability bar for everything the agent touches in the cloud

Areas where you will assist

• Research, by shipping their work to real users in days, not quarters — and feeding back what breaks in production
• Forward-deployed engineers, by giving them backends partners can integrate against without a six-week meeting
• iOS and Android, by drawing the right line between on-device and cloud so neither side carries the wrong weight

Skills you'll be expected to teach

• How to design backends for LLM-powered systems where latency, cost, and non-determinism are first-class concerns
• How to run a production system you'd happily put your name on — observability, incident response, capacity planning

Skills you'll be expected to learn

• The internals of agentic systems from the people who published the canonical papers on them
• What it takes to run agent infrastructure at OEM scale, across Samsung, OPPO, Lenovo, and Vertu devices
• On-device / cloud co-design — when to push compute to the phone and when to keep it on our side

Timeline of success

After 30 days — You've shipped a meaningful change to the agent backend that a user would feel — latency, reliability, or a new capability. You can name the three weakest links in our infra and have started fixing one. You've taken a real on-call shift.

After 60 days — You own a major surface of the backend. A research breakthrough has shipped through systems you designed. Other engineers route their hardest backend questions to you. You've set the reliability and observability bar that new services have to meet.

After 90 days — Our agent backend is something you'd happily defend to an infra engineer at a top-tier consumer company. You've shaped the architecture for one of our partner launches and have a strong, opinionated plan for what our infra needs to look like to support 10M devices.

Compensation

Competitive cash and meaningful equity. Top-tier relocation and immigration support. SF, in person.