Senior Design Engineer, Design System

Design systems used to live in Figma for designers, with engineers translating them into code. Now AI agents write a growing share of our UI, from prototypes to production, and they read code and docs, not Figma. Our design system has to be built for them too.

We’re looking for a Senior Design Engineer to join the team behind Bloom, Vinted’s design system. Bloom exists to help teams build faster while keeping quality high. Your work will make sure AI can build high-quality outputs with Bloom: experiences that are coherent, on-brand and meet the visual bar millions of members expect.

The designers and engineers who build with Bloom are your customers. You’ll own those relationships, decide what to build next and evaluate if it worked.

• Define how Bloom looks and works for AI-assisted building, from foundations and components to how the system is documented and consumed, so people and agents always work from a source of truth that matches the code.
• Lead the system design of our AI tooling, including MCP servers, agent skills and the knowledge they draw on, and evolve it based on how teams actually use it.
• Own our evals: design them, improve them and monitor the quality of what AI tools produce with Bloom.
• Build working tools and prototypes to test ideas with real users before committing to them.
• Own relationships with the teams who use Bloom: understand their needs, prioritise what to build and make technical trade-offs.
• Keep the visual and quality bar high for member-facing experiences while keeping the system coherent.
• Help designers grow into Design Engineers: share practices for working in code and with AI, pair with them and review their work.

• Strong proven experience (typically 5+ years) in design, engineering or both, with a track record of shipping complex products or systems.
• Hands-on experience building working tools and prototypes in code, using AI-assisted tools fluently while critically assessing their output.
• Shipped and owned AI features or internal AI tooling.
• Experience owning customer outcomes: prioritising features, evaluating prototypes and features with real users, and making technical trade-offs. Experience at work and side projects with real users both count.
• Experience designing complex systems, with a strong eye for visual and interaction quality.
• Experience helping others grow through pairing, reviews or sharing practices.
• Excellent communication skills, including excellent written and spoken English.
• A strong collaborator with designers, engineers and product partners.
• A portfolio or work samples showing what you built, your personal contribution, the trade-offs you made and what changed after launch.

Nice to have

• Having built a working AI-ready design system is a huge advantage, but not required.

• The opportunity to benefit from our share options programme
• 25 working days of holiday
• Access to all the tools & tech needed for work
• Home office support: we provide IT workstation equipment and a personal budget of up to 540 for home workplace furniture
• Private health insurance
• Pension plan with flexible contribution options and a matching contribution from Vinted
• Confidential Employee Assistance Program (EAP) for you and your family
• Frequent team-building events
• A personal monthly budget for shopping on Vinted
• A dog-friendly office
• In Vilnius office: gym & in-house meals at friendly prices
• In Kaunas office: a monthly lunch allowance, and a once-a-week provided in-house lunch and breakfast