Senior Growth Design Engineer (m/f/d)

Blockbrain • Stuttgart, AR

34d • €75,000 - €85,000 • Hybrid

About The Position

Blockbrain is hiring a Senior Growth Design Engineer to own and improve the experience from first touch through activation, using design as a driver of growth and conversion. The role owns growth-critical surfaces—including landing pages, signup, onboarding, and activation—from early concepts through production. The engineer works directly in the TypeScript/React codebase, runs experiments end to end, and helps build the design foundation for the company. Design decisions are made collaboratively, with the role serving as a craft anchor and having ownership to shape the work from day one.

The position also defines and maintains Blockbrain’s component library, interaction patterns, spacing, typography, and motion across web, agent UI, and mobile. It includes designing interfaces for complex agent workflows and configuration surfaces, conducting lightweight user research, and establishing design critique practices across the engineering organization. The role uses AI tools and coding agents to explore concepts, produce design variations, and implement frontend work, while contributing design insights to Blockbrain’s agent platform.

Blockbrain offers flexible work models, with on-site work in Stuttgart or Hamburg three days per week and flexible hours. After probation, employees may work abroad for up to eight weeks per year. The stated package is €75,000–€85,000 fixed salary plus €10,000 variable compensation. Benefits include a Deutschland-Ticket, Wellpass fitness membership, access to AI tools, company and team off-sites, and equipment including a MacBook, iPhone, and headset.

Requirements

• At least 6 years of experience in product design, design engineering, or frontend-heavy design roles.
• A strong portfolio demonstrating design craft.
• Strong craft and attention to detail in interactions.
• Ability to design systems that account for components, states, edge cases, and error conditions.
• Ability to read and write code and assess implementation effort.
• Ability to ground decisions in user behavior and metrics, conduct lightweight research and A/B tests, and make decisions under ambiguity.
• Fluent English.
• Use AI tools and coding agents as creative and engineering multipliers.

Nice To Haves

• Experience gained in fast-paced startups or scale-ups where priorities shift and rapid shipping matters.
• Experience as a growth designer or on growth-focused teams, ideally owning funnels, activation, or conversion.
• German language skills.

Responsibilities

• Own landing pages, signup, onboarding, and activation flows from initial sketch through shipped component.
• Design and run experiments and A/B tests based on user behavior and conversion data.
• Implement components directly in the TypeScript/React codebase.
• Define and maintain the component library, interaction patterns, spacing, typography, and motion across web, agent UI, and mobile.
• Design interfaces for complex agent workflows, configuration surfaces, and human-in-the-loop moments.
• Conduct lightweight user research to validate design decisions and identify growth opportunities.
• Establish design critique practices across the engineering organization, define quality standards, and maintain the design bar.
• Use AI tools to generate design variations, explore interaction concepts, and accelerate visual production.
• Use coding agents to implement and iterate on frontend code.
• Work directly with Blockbrain’s agent platform and provide design insights to the product.

Benefits

• Deutschland-Ticket.
• Wellpass fitness membership.
• Access to the latest AI tools.
• Regular company and team off-sites.
• MacBook, iPhone, headset, and other tools needed for the role.
• Flexible working hours and work location; on-site in Stuttgart or Hamburg three days per week.
• After probation, the option to work abroad for up to eight weeks per year.
• Competitive fixed salary plus variable compensation.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed