Fractional Product Systems Designer (Web + iOS) - Remote (U.S. Based)

Part-time : 20-30 hours per month

Details: Competitive hourly rate (Senior, Fractional). Long-term engagement if mutually successful

Job ID: 26FRA301

Fractional Product Systems Designer (Web + iOS) - Remote (U.S.- based)

Overview

Serious Development builds internal business applications at speed using: v0 for prototyping, Angular + PrimeNG for implementation, Native iOS apps that feel like iOS, not web-on-a-phone. We are seeking a Fractional Product Systems Designer (Web + iOS) to design how our products behave over time.

Why This Role Exists

We build internal business applications at speed using:

- v0 for prototyping

- Angular + PrimeNG for implementation

- Native iOS apps that must feel like iOS, not web-on-a-phone

As our velocity increased, traditional screen-based design became unnecessary. What did become necessary is system-level UX ownership .

This role exists to ensure our products remain:

- Predictable

- Consistent

- Native to their platforms

- Easy to learn and hard to misuse

You will not be designing every screen. You will be designing how the product behaves over time.

Who You Are

Required

- Senior-level product or systems designer

- Experience with internal or enterprise applications

- Strong systems thinking; comfortable defining rules and constraints

- Deep familiarity with iOS as a platform (not just mobile UI)

- Comfortable challenging PMs and saying “don’t ship that”

- Pragmatic, opinionated, and not precious about visuals

Strong Plus

- Experience cleaning up inconsistent products

- Familiarity with component-based design systems

- Experience working with engineers directly

- Prior fractional or advisory roles

Red Flags (for us)

- Portfolio-first, system-light background

- Strong preference for redesigns over convergence

- Focus on “delight” over clarity and predictability

- Reliance on Figma as the primary output

What You’ll Be Responsible For

Product-wide UX coherence

- Own interaction patterns across the product

- Ensure similar problems are solved the same way

- Reduce inconsistency as new modules are added

- Prevent UX drift as multiple PMs and teams ship in parallel

Working within existing products

- Audit current applications and patterns

- Identify what already works and should be preserved

- Drive convergence — not redesign-for-the-sake-of-redesign

- Respect user muscle memory

Web UX (Angular + PrimeNG)

- Define how PrimeNG components are used (tables, forms, filters, modals)

- Establish behavioral standards:

- States

- Errors

- Permissions

- Progressive disclosure

- Prevent “almost-the-same” component variants

iOS UX (Native-first)

- Ensure strict alignment with Apple Human Interface Guidelines

- Catch web/Android patterns leaking into iOS

- Enforce native navigation, gestures, and control usage

- Prioritize platform correctness over internal consistency when they conflict

Partnering with PMs

- Review v0 prototypes and early implementations

- Provide fast, opinionated feedback

- Help PMs reason through UX tradeoffs

- Establish clear guardrails PMs can confidently operate within

What You Will Not Be Doing

- Pixel-perfect mock production

- Designing every feature or screen

- Maintaining Figma parity with code

- Visual branding or marketing design

- Creating handoff artifacts for engineers

- If your default output is screens, this is not the right role.

What Success Looks Like

- UX feels consistent across modules and platforms

- PMs move fast without inventing new patterns

- Fewer usability questions from users

- Faster onboarding with less training

- No “why does this work differently over here?” moments

- No large-scale UX rewrites six months later

How You’ll Work

- Review-heavy, not production-heavy

- Embedded early in feature thinking, not late-stage polish

- Prefer rules, patterns, and written guidance over visuals

- Use Fi