Jaka Fefer

About me

Senior Product Designer with 6+ years of experience designing complex, data-heavy products in fintech, infrastructure, and early-stage tech environments. I specialize in high-risk user flows where clarity, error prevention, and trust are critical, including products involving irreversible or financially sensitive actions.

I've led end-to-end product design from concept to launch, built scalable design systems, significantly improved onboarding and early user activation, and influenced product and operational decisions that reduced costs and extended runway. I work closely with engineering and product leadership, often acting as the design authority on usability, risk, and scope tradeoffs.

With a background in computer engineering and frontend development, I design with implementation in mind, understand technical constraints, and collaborate effectively with engineers to ship high-quality products under real business and delivery constraints.

Selected Experience

• Owned the design of critical decision and confirmation flows for irreversible financial actions, reducing user error and increasing confidence in high-risk transactions.
• Improved onboarding completion by ~40% on an early-stage trading platform through structured education and sandbox flows.
• Reduced product and operational costs by ~27% through design-system efficiency and direct collaboration with founders on financial and scope decisions.
• Identified and corrected outsourced development inefficiencies, resulting in a 50% cost reduction over six months.

Design Philosophy