Founding Software Engineer
OuterSignal
Software Engineering
New York, NY, USA
Posted on Jan 3, 2026
Location
New York City
Employment Type
Full time
Location Type
Remote
Department
Engineering
About OuterSignal
We are building the customer intelligence layer for commerce. Brands know when an order comes in, but they only see ~5% of the real story. We show them the other 95%: not just who bought, but who that person is - the execs, influencers, journalists, retail buyers, investors, and everyday customers who become a brand’s best evangelists. Our platform enriches every order in real time with professional + personal signals, unlocks personas, and powers everything from surprise-and-delight outreach to smarter email flows, analytics, and BD leads. We serve 150+ brands and are growing 50% month-over-month - all within our first 6 months of operation. We're a small, high-performing team building the category-defining platform for e-commerce customer intelligence, backed by a world-class investor base.
What You’ll Do:
Architect and own core systems that process 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
Who You Are:
5+ years engineering experience, ideally with backend infra + distributed systems
Experience in a fast-paced startup or willingness to dive in to a dynamic, changing environment
Fluent in JS/TS (Node), with some Python/ML exposure a plus
Experience with vector databases (Pinecone, Weaviate, pgvector, etc.) and RAG architectures
Comfortable designing schemas + scaling Postgres
Bonus if you’ve built around LLMs, Shopify apps, or data-privacy frameworks
Most importantly: you want ownership. You like to build quickly, solve “figure-it-out” problems, and aren’t afraid of messy early-stage work.
Why Join Now:
Early seat: This is shaping the DNA of OuterSignal’s engineering org.
Massive upside: Meaningful equity in a venture-backed company defining a new SaaS category
High leverage work: You’ll see your code directly impact customers, revenue, and growth
Big surface area: From AI pipelines to Shopify apps to RAG/vector search infra, you’ll touch it all
Right moment: We’re past prototype, real brands already rely on us and have PMF, but the ceiling is wide open