Build better products faster

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Hi! I'm Felix ๐Ÿ‘‹ I build design systems and AI workflows that remove the gap between design and code.

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Work

Startup / Solo build

AI-powered supply chain traceability

Designed and built a sourcing platform for a fashion startup โ€” automating vendor communication intake, tracking materials through production, and generating QR codes that trace every garment back to its source.

20+ specialist AI agents replace manual sourcing ops
100% of sustainability claims tied to verifiable records
2027 EU Digital Product Passport โ€” shipped 3 years early
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AI Platform / Solo build ยท in progress

A classifier that knows exactly how good it is

Self-hosted platform for psychological text classification, grounded in an expert's 107,000-word manuscript. Semantic retrieval, LoRA fine-tuning, and an evaluation harness that scores every prompt and model change against practitioner-diagnosed cases before anything ships.

6 local models benchmarked head-to-head on expert-labeled cases
15ร— bigger model gained 0.2 points. Scale wasn't the bottleneck
100% local. Sensitive text never leaves the machine
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Yubico / Principal Product Designer

Reclaimed $3M+ annually by unifying 5 products under one design system

Built a shared component library and design language across 5 products โ€” while a company rebrand was underway.

80% less UI rework across 3 engineering teams
30โ€“45% faster design-to-engineering handoff
~70% fewer visual inconsistencies across products
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Yubico / Design Systems

One change updates 6 platforms โ€” adding $6M to YoY pipeline

Created a design token system that automatically keeps colors, spacing, and typography in sync across web, iOS, Android, and Figma.

6 platforms updated from a single source
0 manual steps between design and code
4 theme dimensions: brand, light/dark, density, screen size
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Principles that scale

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