Staff Backend Engineer (Messaging Infrastructure Startup)
ScrumAID
San Francisco, CA · Posted November 1, 2026
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About the job
A Series A company that operates large-scale text messaging infrastructure is growing quickly across enterprise, small business and political customers. It wants a staff-level backend engineer to join a compact, high-caliber team and take on technical work with company-wide consequences.
Responsibilities
Take ownership of the core backend for routing, delivery, messaging and automation
Design and release production services that move very high message volumes reliably
Lead new products from nothing, building whole product surfaces rather than single features
Work hand in hand with a lean group of engineers
Solve tough infrastructure problems at large scale and move quickly from concept to production
About you
Six or more years of backend-heavy engineering at early-stage startups (pre-seed through Series B)
At least two of the last four years building product at a well-funded venture-backed startup
A visible path of promotion, from senior to staff, lead or founding-engineer level
Experience building complete products from zero to one
Professional Node.js and TypeScript, plus queue-based infrastructure such as AWS SQS
Independent ownership of technical projects and a knack for explaining complex ideas in plain language
A bachelor’s degree in computer science, engineering, math or a related field
Frontend experience is a plus
On-site in the San Francisco Bay Area. Unable to sponsor or transfer visas, so existing US work authorization is required.