Rebuilding MyStoneX - Unifying 40+ Digital Products into a Scalable Ecosystem

Stonex | 2024 - Present

Enterprise redesign and consolidation of 40+ fragmented digital products into a unified financial ecosystem serving retail, commercial and institutional clients. Co-Led design direction, scaled the UI team and owned onboarding across web and mobile.

Design System - Building a system that aligns product, brand and delivery

Stonex | 2024 - Present

Scalable cross-platform design system spanning web and mobile, built on semantic token architecture and structured governance processes, evolved from initial foundations into a full-scale system enabling dark mode, multi-theme support and long-term scalability.

Platform Refresh - Legacy Trading Platforms

Stonex | 2023 - 2024

Full visual refresh of legacy trading platforms (Forex.com & CityIndex), including comprehensive UI audit and reconstruction of structured component libraries, establishing a unified visual foundation across brands, devices and theme environments.

About

Nine years designing digital products - the last three inside StoneX Group, one of the world's largest financial services firms. I co-led the design of MyStoneX: a platform consolidating 40+ fragmented financial products into a single cross-platform ecosystem. That meant owning mobile & web end-to-end, building a design system from scratch, and keeping eight designers and over fifty engineers moving in the same direction under a live product roadmap. I work best in environments where design has to earn its seat at the table: where the problems are structural, the constraints are real, and shipping actually matters.

Maksymilian Kaczorowski

aproach

Design systems are only as good as the teams that can use them. I build for the people who come after me — with governance that survives headcount changes, token architecture that engineers can implement without a translator, and documentation that doesn't require a PhD.

Precision in craft and clarity at scale aren't opposites.
The details matter - every component, every token, every interaction decision. But craft without structure fragments. I treat both as non-negotiable: the quality bar stays high, and the system makes sure it stays consistent across every team and every platform.cture that engineers can implement without a translator, and documentation that doesn't require a PhD. I care about reducing friction between design and engineering more than I care about pixel-perfect mockups. The craft matters, but clarity at scale matters more.

Expertise

Core focus areas defining how I design, lead and scale complex digital platforms — from foundational systems and governance to cross-functional execution and team development.

Expertise

Core focus areas defining how I design, lead and scale complex digital platforms — from foundational systems and governance to cross-functional execution and team development.

enterprise platform design

Designing scalable, multi-segment ecosystems operating across complex domains.

Design Systems & Governance

Establishing structured foundations enabling consistency and long-term scalability.

Complex Workflow Architecture

Structuring high-density operational and financial flows with clarity.

End-to-End Delivery Leadership

Driving initiatives from concept through engineering alignment and implementation.

Cross-Functional Product Alignment

Aligning product, engineering and business stakeholders across multi-team initiatives.

team Development & Mentorship

Scaling design capability through standards, guidance and operational structure.

Maksymilian Kaczorowski, Senior Product Designer, previously at StoneX Group. Complex interfaces, design systems, strategy and cross-functional leadership across digital products.

Rebuilding MyStoneX - Unifying 40+ Digital Products into a Scalable Ecosystem

Design System - Building a system that aligns product, brand and delivery

Platform Refresh - Legacy Trading Platforms

Expertise

Expertise

Experience

Expertise

contact@maksymiliankaczorowski.com