Senior Engineer (Growth)

Senior Engineer (Growth) — Jinba (YC W26)Location: San FranciscoReports to: Head of GrowthAbout JinbaJinba is the enterprise workflow automation platform that lets teams describe workflows in natural language and deploy them as APIs or MCP servers. We have 40,000+ daily enterprise users at Japanese Fortune Global 500 companies — and we're just getting started.We're part of Y Combinator W26.The RoleWe're hiring a Growth Engineer to own the systems that turn signups into customers. You'll work across the full stack — building landing pages, instrumenting funnels, running in-app experiments — whatever it takes to move the metrics.This is an engineering role with a growth mindset, not a marketing role with some coding involved. You'll ship real features, run real experiments, and have direct impact on revenue.What You'll DoBuild and optimize our marketing site, signup flows, and onboardingDesign and run A/B tests across the funnelIntegrate and automate our CRM and lead nurturing systemsShip growth features in the product (referrals, usage triggers, activation loops)Work directly with the Head of Growth to prioritize high-leverage experimentsWhat We're Looking ForFull-stack skills: TypeScript, React, SQL, PythonData fluency: BigQuery, Mixpanel (or similar). You can write queries, build dashboards, and pull your own insightsProduct growth experience: You've thought about activation, retention, and conversion — not just featuresBias to action: You ship fast, measure everything, and iterateComfort with ambiguity: We're early. You'll participate in crafting high leverage hypotheses to test.Nice to HaveEx-technical founder (you've built something from zero)Experience at a PLG or developer tools companyFamiliarity with CRM/marketing automation (Loops, HubSpot, Segment, etc.)Why JinbaYC W26 — breakout startupReal enterprise traction before Demo DaySmall team, big ownershipSan Francisco-based, working on hard problems