Founding Engineer: Agent Runtime & Data Infra (Remote)

SAGARIS; McLean (VA); Hybrid; USD 180,000 - 240,000; Full time

Benefits offered by this job

Founding equity

Remote-first with in-person offsites

Hardware budget

Health coverage

Time-off policy

Job summary

SAGARIS is building a unified platform that blends CRM, calls, texts and social signals. As a founding engineer on Agents & Infrastructure, you own the runtime, data plane, and guardrails end-to-end, setting patterns for years to come.

You will design and deploy scalable backend systems, ensure observability, and collaborate with forward-deployed engineers to ship durable platform capabilities while maintaining auditable, safe autonomy.

Qualifications

• You've built and operated production backend systems at scale.
• Deep comfort with distributed systems, queues, and failure modes.
• You treat correctness and observability as features, not afterthoughts.
• You've worked close to ambiguity and shipped anyway: founding, early-stage, or 0-1 team experience.
• Fluency in a modern backend stack (we use TypeScript and Python)

Responsibilities

• Design and build the agent runtime: planning, tool use, retries, and the approval gates that keep a human in the loop exactly where it matters.
• Own the data infrastructure that unifies CRM, calls, texts and social into a single model of the pipeline.
• Make autonomy auditable: every draft, send, and field an agent touches is attributable and reversible.
• Set the reliability bar (latency, evals, and observability) for systems that act on a customer's behalf.
• Partner with forward-deployed engineers to turn field learnings into durable platform capabilities.

Skills

Backend systems

Distributed systems

Observability

Founding experience

TypeScript

Python

Ambiguity handling

Tools

TypeScript

Python

LLM toolkits

Job description

SAGARIS is building a unified platform that blends CRM, calls, texts and social signals. As a founding engineer on Agents & Infrastructure, you own the runtime, data plane, and guardrails end-to-end, setting patterns for years to come.

You will design and deploy scalable backend systems, ensure observability, and collaborate with forward-deployed engineers to ship durable platform capabilities while maintaining auditable, safe autonomy.