Senior Product Design Engineer

Rohlik; Berlin; On-site; EUR 85,000 - 125,000; Full time

Job summary

Rohlik Group in Berlin is seeking a Senior Product Design Engineer to own end-to-end design of customer-facing surfaces across web, iOS, and Android, and to lead Maia, the AI shopping assistant.

You will manage the Maia design system, guide AI-driven coding workflows, and run user research and usability tests with real shoppers. Join a small, autonomous team delivering measurable impact.

Qualifications

• 5+ years of experience designing consumer-facing digital products (web & mobile).
• Advanced Figma & Design System expertise.
• Data-fluent mindset with ability to interpret A/B test data.
• Experience integrating AI tools into design and design system workflows.
• User research experience with qualitative usability sessions.
• Strong English communication (C1+).
• Nice-to-have: production-grade AI or assistant interfaces.
• Nice-to-have: German or Czech language familiarity.

Responsibilities

• Customer Surfaces: Own end-to-end design across web, iOS, Android for core journey stages.
• Design System as a Product: Own component architecture, design tokens, patterns, and documentation.
• AI Experience Design: Define Maia interaction patterns and handover to human support.
• Experimentation & Analysis: Run rapid prototypes and evaluate A/B results.
• Direct User Research: Conduct qualitative interviews and usability tests with customers.
• Cross-Functional Partnership: Collaborate with Product Owner, Engineering Manager, Tech Lead, and peers.

Skills

5+ years design experience

English proficiency

AI tooling

AB testing interpretation

User research

Cross-functional collaboration

Tools

Figma

Design system

Job description

At Rohlik Group, we are building the future of e-grocery for over a million active customers across the Czech Republic, Germany, Austria, Hungary, and Romania. We own our entire technology stack - from storefronts and apps to automated fulfillment centers and last-mile logistics. Within the Customer Experience (CUEX) domain, we own every touchpoint a customer interacts with, from the homepage to checkout and real-time order tracking across web, iOS, and Android. Our five storefronts run on a single product spine with localized content, pricing, and brand layers. We operate as a deliberately tight-knit, high-performing team where a Product Owner, Engineering Manager, Tech Lead, two Product Designers, and a dedicated full-stack engineering team ship fast, iterate constantly, and take full ownership of the end-to-end user journey. Most interface failures in e-commerce aren't layout issues - they are communication problems: what is said, in what order, and on which screen. As Senior Product Design Engineer, you will own the end-to-end design of all customer-facing surfaces across five markets. You will also manage our design system, Maia (our AI shopping assistant), and provide the design guidance that powers our automated coding workflows.

Why this role is exciting

• High-impact Group scope: Design every customer-facing touchpoint across web, iOS, and Android for five international markets, impacting millions of orders.
• True end-to-end ownership: Lead the complete lifecycle of product design - from initial problem definition and customer research to shipped A/B tests and real-world performance analysis.
• AI-first execution: Rohlik is an AI-first company. You'll own the interface design for Maia, our AI shopping assistant, and build the structured design system guidance used by AI coding agents to generate on-brand code without hand-coding interfaces.
• Direct customer engagement: Lead user research and usability testing sessions directly with real shoppers, rather than commissioning external agencies or receiving filtered insights.
• High accountability, low overhead: Work in a small, autonomous team where design decisions move straight to production and work that doesn't deliver measured impact is honestly reverted.

What you will own and deliver

• Customer Surfaces: Own the end-to-end design and UX strategy across web, iOS, and Android for all core journey stages: homepage, search & browse, product pages, basket, slot selection, checkout, and order tracking.
• Design System as a Product: Own component architecture, design tokens, patterns, and documentation, ensuring our coding agents have precise design guidance to generate accurate interfaces.
• AI Experience Design: Define the interaction patterns for Maia (our AI shopping assistant), governing when it intervenes, how it presents information, and how it hands over to human support.
• Experimentation & Analysis: Drive hypotheses, prototype rapidly, and evaluate A/B test results objectively - scaling successful experiments and sunsetting features that miss target performance.
• Direct User Research: Conduct qualitative interviews, usability tests, and field research directly with customers to continuously uncover friction points.
• Cross-Functional Partnership: Collaborate closely with the Product Owner, Engineering Manager, Tech Lead, and your peer product designer, while providing design input to Commercial, Marketing, and Operations.

What we are looking for

• 5+ years of experience designing consumer-facing digital products with a strong portfolio of shipped work across both web and native mobile (iOS and Android).
• Advanced Figma & Design System expertise: Deep, hands-on experience building, scaling, and architecting multi-platform design systems at the token and component level.
• Data-fluent mindset: Ability to read and rigorously interpret A/B testing data, distinguishing genuine impact from vanity metrics.
• Fluency with AI tooling: Practical experience integrating AI tools into modern design, prototyping, and design system workflows, along with a clear view of where conversational AI adds real interface value.
• User research expertise: Demonstrated experience designing, running, and analyzing qualitative usability sessions directly with end users.
• Strong product reasoning: Excellent communication skills in English (C1 level or above), with the ability to articulate the strategic and behavioral rationale behind design decisions.

Nice-to-haves

• Experience designing production-grade AI or assistant-driven interfaces.
• Experience contributing directly to code at the component or token level.
• Background in e-commerce, quick-commerce, online grocery, or last-mile delivery.
• First‑hand familiarity with how German customers shop.
• Fluency in German or Czech.

What's in it for you

Fair pay, transparent, stable compensation A strong fixed salary