Senior Frontend Engineer: GenAI-Driven Personalization & Edge

HelloFresh; Warszawa; On-site; PLN 240,000 - 420,000; Full time

Benefits offered by this job

Workspace at Warsaw Centre Point

Job summary

HelloFresh’s HelloTech Warsaw team is seeking a senior frontend engineer to drive high‑performant web experiences. You will build personalized conversion pages using React, TypeScript, and edge runtimes, collaborating with machine learning, product and design to ship fast, reliable features for millions of customers.

You will work in a global, data‑driven environment, ensuring top Core Web Vitals, scalable architectures, and robust testing with modern tooling.

Qualifications

• Deep technical proficiency in React, TypeScript, and modern rendering patterns (SSR).
• Proven track record architecting solutions with edge runtimes and understanding impact on latency.
• GenAI expertise with modern AI tools to enhance speed and quality of work.
• Experience with A/B testing and feature flags in frontend contexts.
• Strong collaboration and clear communication across teams.

Responsibilities

• Drive architecture and delivery of personalized conversion pages and funnels using React/TypeScript/Next.js.
• Embed GenAI workflows into development, debugging, and quality processes to accelerate velocity.
• Ensure top-tier funnel performance, optimization of Core Web Vitals and low-latency personalization.
• Maintain the MarTech integration layer and GTM event pipelines feeding analytics/CRM.
• Implement robust automated testing with Jest and Cypress and frontend observability.

Skills

React

TypeScript

SSR

Edge runtimes

GenAI

A/B testing

Frontend observability

Tools

Vercel Edge Functions

Cloudflare Workers

Jest

Cypress

OpenTelemetry

Honeycomb

Grafana

Sentry

Job description

HelloFresh’s HelloTech Warsaw team is seeking a senior frontend engineer to drive high‑performant web experiences. You will build personalized conversion pages using React, TypeScript, and edge runtimes, collaborating with machine learning, product and design to ship fast, reliable features for millions of customers.

You will work in a global, data‑driven environment, ensuring top Core Web Vitals, scalable architectures, and robust testing with modern tooling.