Senior Backend Engineer, API Agents & Orchestration

United States Digital Space LLC; San Francisco (CA); On-site; USD 140,000 - 200,000; Full time

Job summary

United States Digital Space LLC is seeking an experienced backend software engineer to build core systems behind next-generation agents. You will design reliable services to help agents access context, use tools, retain knowledge, coordinate long-running workflows, and operate safely.

This is a role at the intersection of backend, infrastructure, and product. You will design, build, and operate shared harnesses and backend infrastructure to power high-value workflows, with opportunities across

Qualifications

• 7+ years of professional engineering experience, excluding internships.
• Exceptional backend engineering fundamentals and a track record of leading complex systems from ambiguous problem statements to reliable production services.
• Proficiency in one or more backend languages such as Python, Go, Rust, TypeScript, or similar, with the ability to move across service, platform, and product boundaries.
• Strong systems design and operational judgment across distributed systems, APIs, workflow orchestration, search or storage, compute and execution, identity and permissions, or observability and reliability.
• Infrastructure depth paired with product judgment: abstract complex systems into simple, durable primitives for other engineers.
• Strong developer empathy and communication skills, including working with users, research teams, and product engineers.
• High agency and ownership of security, reliability, and operational excellence.

Responsibilities

• Design, build, and operate the shared agent harness and backend infrastructure for long-running, high-value workflows.
• Build reusable capabilities across search, memory, tool execution, delegation, subagents, and multi-agent orchestration.
• Establish foundations for safe production operation, including secure execution environments, identity and permissions, observability, evaluations, reliability, and cost/latency efficiency.
• Collaborate with Research, Codex, infrastructure, and product teams to translate model progress and workflow needs into shared capabilities.

Skills

7+ years backend experience

Backend design and reliability

Strong systems design

Developer empathy and communication

High ownership & security

Tools

Python

Go

Rust

TypeScript

Job description

United States Digital Space LLC is seeking an experienced backend software engineer to build core systems behind next-generation agents. You will design reliable services to help agents access context, use tools, retain knowledge, coordinate long-running workflows, and operate safely.

This is a role at the intersection of backend, infrastructure, and product. You will design, build, and operate shared harnesses and backend infrastructure to power high-value workflows, with opportunities across