Growth Engineer: Fast Self-Hosted Frontend & Experiments

Lully

Madrid

On-site

EUR 60,000 - 90,000

Full time

14 days+

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Job summary

Jobtailor is seeking a senior frontend engineer to migrate our marketing site and customer funnels from Webflow to a fast, self-hosted Next.js/Vercel frontend with Payload CMS.

You will architect dynamic landing page templates for VIP accounts, ensuring flawless asset delivery and zero layout shifts. You will implement advanced in-platform tracking, feed data into Salesforce, and own growth experimentation and server-side A/B testing to improve conversions.

Qualifications

Proficient in React, Next.js (App Router), TypeScript, and Node.js
Experience with headless CMS (Payload CMS preferred, Strapi or equivalent)
Familiar with hosting on Vercel and edge-centric routing
Strong knowledge of event tracking architectures (PostHog, Mixpanel, or Segment)
Experience integrating data into enterprise CRMs (Salesforce)

Responsibilities

Lead migration of marketing site and funnels from Webflow to a fast self-hosted frontend (Next.js/Vercel)
Architect dynamic landing templates for VIP accounts with asset delivery and metrics
Implement robust in-platform tracking for sales visibility
Pipe event data from PostHog and outbound tools into Salesforce with clean API payloads
Build and maintain growth experimentation infrastructure
Design, launch, and analyze server-side A/B tests to optimize conversions

Skills

React

Next.js

TypeScript

Node.js

Payload CMS

Strapi

Vercel

PostHog

Salesforce

Tools

Vercel

PostHog

Mixpanel

Segment

Salesforce

Job description

Jobtailor is seeking a senior frontend engineer to migrate our marketing site and customer funnels from Webflow to a fast, self-hosted Next.js/Vercel frontend with Payload CMS.

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