SnapshotJoin Mainframe's Growth & Go-to-Market (GTM) Engineering pod and ship code that directly moves the metrics that matter - acquisition, activation, and revenue. You'll prototype growth experiments, wire up data pipelines, and automate the RevOps stack so our AI teammates reach more users, faster. It's a 12-week, US-time-zone internship where you'll work full-stack, pair with marketing and product, and learn how technical GTM actually happens at a frontier-tech startup.The RoleBuild growth experiments end-to-end. Code A/B tests across landing pages, signup, onboarding, and pricing flows; ship quickly, measure rigorously, and double-down on wins.Instrument and own the PLG data stack. Add event tracking, dashboards, and attribution so every experiment rolls up to clear KPIs (ARR, RES, CAC, LTV).Automate GTM workflows. Stitch APIs between CRM, marketing automation, billing, and analytics to keep leads, trials, and cohorts in sync. Optimize performance & UX. Profile and improve FCP/LCP on marketing surfaces and in-app touch points so prospects hit "time-to-value" faster. Collaborate cross-functionally. Sit inside the Growth squad but pair daily with Design, Backend, SalesOps, and AI/ML teams to ship multi-disciplinary projects. Demo your impact. Ship one capstone project and present results (uplift, learnings, next steps) to founders at internship close.QualificationsActively pursuing a BS/MS in CS, Data, EE, HCI, or similarDecember 2025 - June 2026 grads preferred. Comfortable in TypeScript, React, Node, SQL, and rapidly prototyping in low-code tools when speed > purity. Working knowledge of analytics & experimentation stacks (e.g., PostHog). Familiar with REST/GraphQL APIs and common GTM platforms Data-curious: you enjoy debugging funnel drop-offs, writing the SQL to prove it, and turning insight into product. Clear written and verbal communicator who can explain a growth idea to both engineers and marketers. Nice to HavesPrior startup, founder, or hack-project experience where you shipped something users touched. Exposure to AI agents, LLM tooling, or marketing-ops automation. Familiarity with iOS TestFlight pipelines (helps as Cobot spans web & mobile).Experience scaling PLG infrastructure, feature-flagging, or building internal RevOps dashboards.Our principlesShip early and often Embrace ambiguityPrioritize the user experience.ApplyPlease reach out to us and provide your resume here.Mainframe is an equal opportunity employer. We are committed to building a diverse and inclusive workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.