About HappyRobot
HappyRobot is the infrastructure for enterprises to build and orchestrate AI workforces. Our AI workers don't just communicate - they make decisions, take action, and run operations autonomously across voice, email, and enterprise systems. Born in Y Combinator (S23) and backed by a16z and Base10 with over $60M raised, we power critical operations for general enterprises worldwide.
Our platform is battle-tested in the most demanding environments - where AI has real consequences. We started in logistics, built our own voice stack, models, and orchestration layer from the ground up, and are now bringing that infrastructure to every enterprise that runs the real economy. Learn more about our vision in our manifesto.
Role Overview
As our
Growth Engineer, you will own the entire technical lifecycle of our digital presence—moving our website infrastructure to a fully self-hosted environment built on Vercel and Payload CMS. Our primary focus is driving high-value enterprise demos through product experiences. We are moving away from restrictive marketing-led visual site builders (Webflow) and shifting to a highly technical, engineering-driven experimentation engine.
Beyond styling static landing pages, you will be building scalable code infrastructure that enables edge personalization for our VIP customers, mapping full in-platform user context, and repairing complex analytics pipelines. We are looking for a deeply independent builder who can think holistically about business processes while maintaining the high standards of a core platform engineer.
What You’ll Do




Lead the engineering effort to migrate our marketing site and customer funnels out of Webflow and into an ultra-fast, self-hosted frontend built on Next.Js/Vercel and Payload CMS.
Architect dynamic, programmatic landing page templates for high-value VIP accounts that pull tailored assets, logos, and account metrics flawlessly without layout shifts or visual "flicker".
Implement best-in-class, in-platform tracking that diagnoses existing data gaps and implement robust tracking so our sales teams have total visibility into what accounts are doing inside our platform.
Seamlessly pipe event data and user traits from PostHog and outbound tooling directly down into Salesforce CRM, optimizing API payloads to maintain immaculate CRM data hygiene.
Build and maintain our growth experimentation infrastructure.
Design, launch, and analyze complex server-side A/B tests that target key conversion loops and drive enterprise demo bookings.
Must Have
Strong track record of building things entirely on your own from scratch. You don't wait for a perfectly detailed specification document—you see a gap in our process or tracking and you fix it.
Deep technical mastery of React, Next.Js (App Router), TypeScript, and Node.Js.
Direct experience building with modern, open-source headless content management systems (ideally Payload CMS, Strapi,



or equivalent developer-first tools).
Strong familiarity hosting applications on Vercel and utilizing Edge Middleware, Edge Functions, or CDN-level routing to achieve 0ms-latency personalization.
Advanced knowledge of event tracking architectures using tools like PostHog, Mixpanel, or Segment.
Experience managing data flows into enterprise CRMs (Salesforce) is highly desired.
Benefits
Top-Tier Compensation - Competitive salary + equity in a high-growth startup.
Comprehensive Benefits - Healthcare, dental, vision coverage.
Privacy and Data Use
The personal data provided in your application and during the selection process will be processed by Happyrobot, Inc., acting as Data Controller.
By sending us your CV, you consent to the processing of your personal data for the purpose of evaluating and selecting you as a candidate for the position. Your personal data will be treated confidentially and will only be used for the recruitment process of the selected job offer.
In relation to the period of conservation of your personal data, these will be eliminated after three months of inactivity in compliance with the GDPR and legislation on the protection of personal data.
If you wish to exercise your rights of access, rectification, deletion, portability or opposition in relation to your personal data, you can do so through subject to the GDPR.
For more information, visit />By submitting your request, you confirm that you have read and understood this clause and that you agree to the processing of your personal data as described.
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📌 Growth Engineer (Madrid)
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