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Senior Frontend Engineer, Conversions (all genders)

Warszawa, Masovian Voivodeship, Poland💼 Full-time🗓 2026-07-30 → 2026-09-26

Core

Build personalized web experiences and conversion funnels using React, Next.js, and edge environments to drive marketing innovation and growth for HelloFresh's meal brands.

Role type

Senior Frontend Engineer (Conversions & MarTech)

Builds

Personalized conversion pages, funnels, MarTech integration layers, and behavioral lead-capture tools

Domain

Direct-to-consumer food delivery / MarTech / Growth Engineering

Deliverable

production ML models | product features

Required skills

React, TypeScript, Next.js, SSR middleware, Edge runtimes (Vercel Edge Functions, Cloudflare Workers), GenAI tooling, A/B testing frameworks, frontend observability

Preferred skills

Experience with CMS integration, experimentation frameworks, automated testing strategies

Technologies

React, Next.js, TypeScript, Vercel Edge Functions, Cloudflare Workers, Jest, Cypress, OpenTelemetry, Honeycomb, Grafana, Sentry, Statsig, Optimizely, Contentful, Claude, Cursor

Responsibilities

Drive architecture and delivery of personalized conversion pages and funnels; Champion GenAI proficiency in development workflows; Ensure top-tier funnel performance and application stability; Architect and maintain the MarTech integration layer; Implement robust automated testing strategies; Partner with cross-functional experts to shape personalized user experiences

Seniority

Senior, hands-on IC

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