Peaks Co-Invest Account

Designed the end-to-end onboarding and connection flows for a new Co-Invest investment product.

Resolved a core UX tension: making a non-intuitive financial concept feel immediately trustworthy and simple to act on.

Extended the brief across three rounds — adding user profiles, a custom portfolio flow, and persona-targeted social content.

Structured every screen around a single guiding principle: invest together, grow separately.

Problem:

Co-Invest is a genuinely difficult product to explain. Individual accounts, linked for shared visibility and collective goals, sit in unfamiliar territory for most users — somewhere between a joint account and a personal investment. The risk of misunderstanding ownership is real, and in a fintech context, confusion about who controls what money can be a dealbreaker.

The brief required a complete account opening flow, a connection flow for adding members, and an Instagram Story that could communicate the concept to a cold audience — all while staying within Peaks' existing design system.

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Approach:

The entire design system was built around one line of copy: invest together, grow separately. Concept education was front-loaded through clarity cards before any commitment, with ownership reassurance repeated at the key anxiety points — pre-join terms, the review state, and the post-creation dashboard. The connection flow handled two distinct scenarios: finding an existing Peaks account and inviting someone new, with a celebration state on acceptance to make the social moment feel rewarding rather than administrative.

The second round expanded into four user profiles — Sofie the Accidental Investor, Daan the Deliberate Builder, Lena the Financially Anxious Grown-Up, and Jordi the Social Investor — each paired with a persona-specific Instagram Story series, and a revised social campaign moving from illustrated UI to real photography and bold typography.

The third round refined the custom portfolio flow — replacing a manual allocation input with a stepper-based UI, auto-balance option, and a live running total that turned green at 100%. Legal consent was integrated at the point of decision rather than surfaced as a separate drawer, keeping the flow clean without losing compliance rigour.

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Solution:

I designed the app flow and navigation framework for the James Harden Vol. 5 launch, creating a structured and immersive product experience within the adidas app. The layout integrates on-model footage and community-driven content into a clear visual hierarchy that guides users through performance details, design intent, and cultural context.

The final experience delivers a more detailed and engaging understanding of the product while remaining intuitive, structured, and aligned with adidas’s broader commerce patterns.

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Luke James Miller Design ©
2026 Amsterdam, The Netherlands

User Experience
User Interface
Product Design
Brand Systems

Email: hello@lukejm.com
IG: @mrlukejm
LinkedIn: @lukejm

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