Frontend Engineer / Frontend Architect

Introduction

Teaser

Two products, two backends, one frontend vision: build the AI-first frontend platform and design system that lets our engineers, product managers and designers ship UI at speed. A senior hands-on role with architect-level influence, no people management, and our CPTO as your executive sponsor.

Role at a glance

- Level: Staff/Principal-level individual contributor – technical leadership, no direct reports

- Reporting line: VP Engineering. Executive sponsor: our CPTO

- Products: FactFinder NG (React on a Java backend) and Infinity (React on a .NET/F# backend)

- Stack you'll shape: React, TypeScript, Web Components, design tokens, Storybook, AI coding tools (Claude Code, Cursor, MCP-based tooling)

- Team: Product & Technology organization of around 25 people, led by our CPTO, working in a product trio model with product and design

- Location: Berlin; Munich, Pforzheim or Stockholm possible – hybrid with 2–3 office days per week; occasional travel (<10%) for offsites and design-system workshops

- Start: as soon as possible

FactFinder is one of the leading product discovery platforms for European eCommerce. For more than 20 years we've applied AI and machine learning to product search, navigation, personalization and recommendations. Our Product Discovery Experience (PDX) spans two products: FactFinder NG, an exact and highly configurable search, and Infinity, a self-learning, behavioral discovery engine. More than 2,000 customers generate over €160 billion in annual GMV on our platform.

We're around 90 people with a new management team, a clear growth plan and reknown investors behind us. Right now we're rebuilding our product and tech organization around an AI-first way of working and agentic commerce – and this role sits at the center of it.

Why this role exists

Our two products run two React frontends with very different technical roots. We need a vision, an architect, and an owner — someone who will unify them into a single, efficient system, build the shared design system on top, and enable product managers and designers to prototype and ship production-grade UI themselves with AI tooling. Incrementally, without a big-bang rewrite, and while both products keep shipping.

• Define and drive the target frontend architecture across both React products – one consistent, efficient React-based system, migrated step by step
• Build and own our shared design system: tokens, component library and Web Components for embeddable shop UI, tightly aligned with Product Design
• Create an AI-first prototyping and contribution framework – design system, AI coding tools, guardrails, automated review and CI – so product managers and designers can prototype and contribute production-grade UI
• Stay hands-on: write a significant share of the critical code, set standards, and pair with and level up our frontend engineers
• Work with a clear operating split: after architecture-focused first stints, spend around 80% of your time hands-on coding and 20% on architecture, design-system leadership and enablement
• After 90 days: frontend audit of both products done, target architecture and migration roadmap agreed, design-system tokens and core components live, and the first prototype built and shipped by a product manager or designer on the new framework
• After 12 months: both products run on the shared design system, the frontend rework shows measurable efficiency gains, and product and design prototype independently as a routine – frontend is no longer the bottleneck

Who thrives here

Probably not for you if you'd rather produce architecture concepts than running code, want to go deep on one product and leave the cross-product system to others, or are looking for a people-management role.

THE JOY OF WORKING WITH US

How we hire

Remote, with feedback within 48 hours after every step:

1. 30-minute intro call with our Recruiter Mirko

2. 60-minute technical interview with our VP Engineering (your future manager) and an engineering lead: one frontend modernization you led, your design-system story, and how you use AI day to day

3. Case study: a hands-on part (AI tools explicitly welcome – walk us through how you used them) and a 45-minute architecture session

4. Team panel and a 45-minute conversation with our CPTO – optionally on site

FAQ

Is this a people-management role? No. It's a senior individual-contributor role: you lead through architecture, standards and enablement, without direct reports.

Who will I report to? Our VP Engineering. The role is sponsored by our CPTO: the frontend platform is one of the CPTO's top priorities, you agree the target architecture and migration roadmap together, and the CPTO holds your final interview.

Which tech stack will I work with? React and TypeScript on both products. FactFinder NG runs on a Java backend, Infinity on .NET/F# (with Fable/Feliz on the frontend). Backend, F# and our search domain are things you can learn here – React expertise, Web Components, design-system architecture and AI-first practice are what you bring from day one.

Is «AI-first» real here, or a buzzword? It's driven by our CPTO and part of the career ladder for every engineer. Your mandate is to take it from individual productivity to organization-wide practice.

Two legacy frontends on Java and .NET – isn't that painful? That's exactly the mandate: unify them, and how is your call. Incremental, not big-bang.

Can I work fully remote? No – the role is hybrid with 2–3 office days per week at one of our offices.

Why eCommerce search? Because agentic commerce is where AI meets real purchase decisions – on our platform that's 2,000+ shops and €160+ billion in GMV a year.

Apply

Send us your CV or LinkedIn profile plus links to work you're proud of (GitHub, a design system, a talk, a blog post) – and tell us in three sentences how you use AI in your daily engineering work. No cover letter needed.

Your contact: Mirko Duus