Senior SWE, Backend (AI)

TL;DR

Senior Backend Software Engineer (AI): Owning critical backend infrastructure, including systems behind team management, permissions, LLM efficiency, and integration-driven workflows with an accent on performance, reliability, and seamless user experience. Focus on building scalable systems, improving observability, and reducing cost through practical optimizations.

Location: Must be based in or willing to relocate to NYC or SF, 100% in-office culture during the week.

Salary: $180K – $250K

Company

We're a small, senior team building the intelligent OS for the agentic age.

What you will do

• Build backend systems that support product growth, including multi-tenant foundations, permissions, and internal/admin tooling.
• Design and operate asynchronous processing systems for background workloads and workflow orchestration.
• Improve system performance and cost through practical optimizations (caching, batching, efficient data access patterns).
• Build secure, extensible integration infrastructure (authentication, APIs, third-party connectors).
• Raise the bar on backend engineering quality through observability, testing, incident readiness, and operational best practices.
• Collaborate cross-functionally to ship features end-to-end while designing backend systems that are durable, extensible, and easy to iterate on.

Requirements

• 5+ years of experience at a fast-moving startup with experience shipping production backend systems.
• Comfort owning systems end-to-end: from architecture and implementation to deployment, monitoring, and debugging.
• Experience building reliable distributed systems (APIs, databases, async jobs, queues, pipelines).
• Experience building real-time systems (WebSockets, pub/sub, event fanout) with low-latency and reliability at scale.
• Experience building enterprise-ready multi-tenant systems, including team management, roles/permissions, and admin/internal tooling.
• Must be based in or willing to relocate to NYC or SF – although we’re flexible with days off & schedules, we have a 100% in-office culture during the week.

Nice to have

• Familiarity with LLM product infrastructure patterns (caching, batching, evals, integrations) is a plus.

Culture & Benefits

• Competitive salary and generous equity package.
• Health, dental, and vision insurance.
• Flexible PTO and parental leave.
• Paid team lunches and dinners during the week.
• Relocation package.