Backend Engineer, Agent Infra — Reliable Runtimes

Specter; New York (NY); On-site; USD 150,000 - 210,000; Full time

Job summary

Specter’s agents run unattended on customer data overnight, on schedule, and on demand. They read general ledgers, query banks, post journal entries, and send messages on behalf of finance teams. The infrastructure under them — orchestration, retries, observability, sandboxing, cost control — is the difference between a demo and a system a CFO trusts with the books.

This role builds that infrastructure. It's one of the highest-leverage engineering roles at the company, because everything else in

Qualifications

• Strong backend engineer with Python/PostgreSQL experience.
• Focus on correctness and recovery: idempotency and exactly-once vs at-least-once.
• Experience with LLM-shaped workloads and long-running tasks.

Responsibilities

• Build and own the agent runtime including scheduling, queuing, retries, idempotency and audit trails.
• Design an observable, replayable, auditable stack for agent actions.
• Optimize runtime efficiency: minimize token spend, latency, and manage parallelism.
• Create integration layer to connect agents to ERPs, banks, and spreadsheets across systems.
• Define production readiness criteria for agent code across the org.

Skills

Python

PostgreSQL

Async

Distributed systems

Debug production issues

Tools

Vector stores

Graph databases

Job description

Specter’s agents run unattended on customer data overnight, on schedule, and on demand. They read general ledgers, query banks, post journal entries, and send messages on behalf of finance teams. The infrastructure under them — orchestration, retries, observability, sandboxing, cost control — is the difference between a demo and a system a CFO trusts with the books.

This role builds that infrastructure. It's one of the highest-leverage engineering roles at the company, because everything else in