Mid Backend Engineer — AI Systems, Equity, On-site SF

Zof AI, Inc.; San Francisco (CA); On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

MacBook Pro

Premium AI development tools

Cursor Ultra

Claude Code Ultra

OpenAI Codex Max

Job summary

Zof AI, Inc. in San Francisco, CA is seeking a Backend Developer to own the services, APIs, and data layer that our agent fleets run on.

This full-time role focuses on job orchestration, queueing, and reliable data storage for evidence and validation artifacts in production. The ideal candidate writes clear, well-tested services, reason about failure and state, and balances throughput, correctness, and cost in a fast-moving environment.

Qualifications

• Experience building and shipping backend services in production.
• Strong software engineering foundation.
• Working knowledge of relational databases and SQL, ideally Postgres.
• Familiarity with APIs, queues, and asynchronous job processing.
• Ability to debug performance and correctness issues in running systems.
• Habit of proving your work with tests and evidence before it ships.
• Clear written and verbal communication.
• Comfort operating in a fast-moving environment.

Responsibilities

• Design, build, and operate the services and APIs our agent fleets run on.
• Build the job orchestration and queueing that keeps long-running agent work moving.
• Own Postgres schema design, migrations, and query performance as data grows.
• Ship the storage and retrieval paths for the evidence and traces every agent run produces.
• Instrument services so failures are observable, debuggable, and recoverable.
• Harden reliability with testing, retries, idempotency, and backpressure under real load.
• Partner with product and AI engineers to turn agent behavior into stable interfaces.
• Own backend systems from design through production.

Skills

Backend development

Software engineering fundamentals

Testing & validation

Debugging performance

Clear communication

Adapting to fast-moving environment

Tools

PostgreSQL

APIs

Queues & async processing

TypeScript

Node.js

Python

Job description

Zof AI, Inc. in San Francisco, CA is seeking a Backend Developer to own the services, APIs, and data layer that our agent fleets run on.

This full-time role focuses on job orchestration, queueing, and reliable data storage for evidence and validation artifacts in production. The ideal candidate writes clear, well-tested services, reason about failure and state, and balances throughput, correctness, and cost in a fast-moving environment.