MyStoneX brings together over 40 fragmented financial products into a single, scalable ecosystem. The project demanded architectural alignment across platforms, interaction logic and visual systems - while operating within evolving product and engineering constraints.

My Role

Led mobile ownership and contributed to defining the visual and systemic direction of MyStoneX.

Designed core financial modules (Funds, Positions, Onboarding) while guiding the transition from an early foundation to a scalable semantic design system.

Strengthened alignment between design, engineering and QA, and supported team growth during scaling.

Results

Migrated mobile foundations and trading modules to V2 semantic architecture

Implemented full dark mode for mobile; prepared token structure for web

Reduced visual inconsistencies and implementation drift

Improved engineering alignment through earlier validation cycles

Contributed to faster trading feature delivery compared to initial foundation rollout

MyStoneX is a unified trading and finance ecosystem combining multi-segment account management under a shared cross-platform architecture.

The platform integrates multi-account fund management, trading workspaces, positions monitoring and onboarding flows across web and mobile environments.

Built to serve multiple client segments under one architecture, MyStoneX required structural consistency while scaling functionality in parallel.

MyStoneX operates as a unified ecosystem built on a shared architectural foundation. The platform needed to support multiple account structures, evolving product domains and varying operational interfaces - all within a single cross-platform system.

This introduced several structural challenges:

Multi-Account Architecture

Users interact with different account structures under the same ecosystem, requiring a platform capable of adapting interface depth and functionality depending on context.

Cross-Platform Delivery

The system was designed to operate consistently across web and mobile environments while supporting a wide range of operational workflows.

Product Layering

Multiple product layers coexist within the same ecosystem - from account infrastructure to advanced trading interfaces - requiring a flexible yet consistent system architecture.

Funding

Funding defined the operational entry point for every user and is a vital point for trading experience.

The challenging point was to design flows that remain consistent across different account types while handling different transaction models, currencies, and compliance constraints.

Trading

Trading required a flexible interface capable of adapting to different user behaviors and levels of complexity.

The system introduced modular workspaces, enabling users to structure their environment around individual strategies and data needs.

Helping our clients to stay in loop with markets.

The platform enabled users to stay continuously connected with capital markets through a dedicated mobile trading experience.

Real-time data, positions monitoring and access to key trading actions allowed users to track market movements and respond without being tied to a desktop environment.

System Architecture

MyStoneX was developed alongside evolving design system. As the platform expanded across multiple product domains, maintaining visual and structural consistency became increasingly challenging.

This led to the long-term process of developing the system early foundations that further in the process evolved into a more structured architecture with
Design -> Developement -> Release processes settled.

A deeper look into this work is covered in the Design System case study.

Impact

Unified access to financial services

Instead of navigating multiple separate platforms, users can access different financial operations through a single ecosystem and account infrastructure.

Flexible interface for different client contexts

The platform adapts its functionality and interface depth depending on the account environment, enabling different operational models within one system.

Foundation for scalable product growth

By consolidating previously fragmented services under one architecture, MyStoneX created a platform capable of supporting new financial products within one application supporting
complex StoneX financial ecosystem.

(C)2026, Maksymilian Kaczorowski