Senior Backend Engineer — AI Infra & RAG

OuterSignal; New York (NY); On-site; USD 200,000 - 300,000; Full time

Benefits offered by this job

Equity

Growth opportunities

Early-stage team

Job summary

OuterSignal, a startup building the customer intelligence layer for commerce, is seeking a senior backend engineer to own core systems and data pipelines. You’ll design scalable infra to process millions of orders, implement vector DB/RAG workflows, and ship end-to-end features with Shopify, Klaviyo, Slack, Zapier, and more.

You’ll work directly with the Founding Team on roadmap and hiring future engineers.

Qualifications

• 5+ years engineering experience, backend infra + distributed systems.
• Fluent in JS/TS; Python exposure is a plus.
• Experience with vector databases and RAG architectures.
• Ownership mindset; able to ship quickly in an early-stage startup.

Responsibilities

• Architect and own core systems processing millions of orders across APIs and LLM pipelines.
• Build queue-based microservices using Redis, Node.js, TypeScript, Postgres, Docker/K8s, Vercel.
• Integrate vector databases + RAG pipelines to make customer profiles smarter, faster, and searchable in real time.
• Ship features end-to-end: APIs, dashboards, integrations (Shopify, Klaviyo, Slack, Zapier, Gorgias).
• Keep us ahead on privacy & compliance.
• Work directly with Founding Team on roadmap, product direction, and hiring future engineers.

Skills

Backend infra

Distributed systems

JavaScript/TypeScript

Python ML

Vector databases

RAG architectures

PostgreSQL

LLMs

Job description

OuterSignal, a startup building the customer intelligence layer for commerce, is seeking a senior backend engineer to own core systems and data pipelines. You’ll design scalable infra to process millions of orders, implement vector DB/RAG workflows, and ship end-to-end features with Shopify, Klaviyo, Slack, Zapier, and more.

You’ll work directly with the Founding Team on roadmap and hiring future engineers.