Staff Backend Engineer (Typescript)

Staff Backend Engineer Location: SF/NY/ remote USStart Date: By May 2026Compensation: $225K - $300K + equityAbout the OpportunityRubiboo is a headhunting firm. We are collaborating with a YC-backed, high-growth AI startup at the forefront of autonomous software systems. The company is experiencing rapid scale and already serves hundreds of customers globally.As they expand, they are looking to bring on a Staff Backend Engineer to design, build, and scale the core infrastructure powering their AI systems.The RoleThis is a high-impact, hands-on engineering role focused on building scalable backend systems using TypeScript. You will work closely with product and AI teams to ship reliable, high-performance systems in a fast-moving environment.Key ResponsibilitiesDesign and build scalable backend services and APIs using TypeScriptArchitect systems that handle high throughput, reliability, and performance requirementsCollaborate closely with product, AI, and frontend teams to ship end-to-end featuresOwn services in production, including monitoring, debugging, and performance optimizationContribute to system design, technical strategy, and engineering best practicesImprove developer experience, tooling, and infrastructureMust-Have Requirements (in order of importance)Strong backend engineering experience with TypeScript (Node.js ecosystem)Proven experience designing and scaling distributed systemsAbility to start by April 2026Startup experience (comfortable with ambiguity, speed, and ownership)Availability to work US hoursNice to HaveExperience working with AI/ML-driven productsFamiliarity with cloud infrastructure (AWS, GCP, or similar)Experience with databases (SQL and/or NoSQL) and data modelingExposure to event-driven architectures or real-time systemsWhy This RoleJoin a YC-backed company at a critical stage of growthHigh ownership and direct impact on company trajectoryWork alongside a fast-moving, product-driven team at the frontier of AI