100+ shipped projects

Design systems. Product. AI.

Design systems.
Product. AI.

Design systems.

Product. AI.

16 years

cross functional collaboration

design leadership

design system development

design thinking

high fidelity ui design

front-end collaboration

product strategy & roadmap

prototyping

ux design

ux research & discovery

ai workflows

team mentoring

video editing

No big deal!

The Designer

The Maker

The Collaborator

The Strategist

The Pioneer

The Enabler

17+ years across in-house, agency and consultancies - spanning start-ups, scale-ups, government and global brands. SaaS, B2B, D2C, G2C, G2B, G2-whatever. I tackle real problems, end-to-end, with design integrity, sharp craft and a natural instinct for what good looks like.

The Designer

The Maker

The Collaborator

The Strategist

The Pioneer

The Enabler

17+ years across in-house, agency and consultancies - spanning start-ups, scale-ups, government and global brands. SaaS, B2B, D2C, G2C, G2B, G2-whatever. I tackle real problems, end-to-end, with design integrity, sharp craft and a natural instinct for what good looks like.

The Designer

17+ years across in-house, agency and consultancies - spanning start-ups, scale-ups, government and global brands. SaaS, B2B, D2C, G2C, G2B, G2-whatever. I tackle real problems, end-to-end, with design integrity, sharp craft and a natural instinct for what good looks like.

The Maker

I craft high-fidelity designs, prototypes and design systems that scale. I’m not a developer, but I understand how things are built and work closely with engineers to make sure nothing gets lost in translation. With a background in art and design, I set a high bar for execution.

The Collaborator

I work closely with PMs, engineers and stakeholders to get to the heart of the problem and figure out the best way forward. I listen, I challenge and I bring others into the process early, not just for buy-in, but because better ideas come from working it out together.

The Strategist

I collaborate with PMs and POs on product direction, prioritisation and making things happen, realistically, pragmatically. But that doesn’t stop me dreaming big. I think beyond my remit to spot opportunities in the product, the organisation or ways of working.

The Pioneer

I love early-stage, ambiguous spaces, the 0–1, the messy, the undefined. I get stuck in, figure things out and start giving shape to what might be. I trust my instincts, work fast, but stay connected to users to move towards product–market fit.

The Enabler

I build strong design culture through rituals, mentoring and sharing what works. I don’t expect full-stack unicorns, I value people’s strengths and create space for them to do their best work. That means trust, structure and room to get it wrong sometimes.

Dragonpass

Password required

Taking a hugely underperforming login flow (32.6%) to a projected 65–82% success rate

deep discovery

digital brand

product design

  • Before: 32.6% login success rate

  • After: Projected range of approx. 65–80% login success (+32–50%)

  • Biometric opt-in: From 14% to 100% (user intent; actual may vary)

  • Customer support load: Major anticipated reduction

Taking a hugely underperforming login flow (32.6%) to a projected 65–82% success rate

deep discovery

digital brand

product design

  • Before: 32.6% login success rate

  • After: Projected range of approx. 65–80% login success (+32–50%)

  • Biometric opt-in: From 14% to 100% (user intent; actual may vary)

  • Customer support load: Major anticipated reduction

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Marius Cloete

She has ninja-level capabilities to hit demanding headlines.

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Marius Cloete

She has ninja-level capabilities to hit demanding headlines.

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Marius Cloete

She has ninja-level capabilities to hit demanding headlines.

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Fareed Iqbal

Despite being a contractor, she worked like a permanent member of staff and showed care in her work like it was her own company.

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Fareed Iqbal

Despite being a contractor, she worked like a permanent member of staff and showed care in her work like it was her own company.

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Fareed Iqbal

Despite being a contractor, she worked like a permanent member of staff and showed care in her work like it was her own company.

More..ish

Ready for review

Stamped out: a founder’s tale of the little loyalty app that could have been

end-to-end

branding

product strategy

  • Research, brand and MVP for a loyalty platform for small businesses

  • 100+ vendors and 5,000+ users at peak

  • Scalable design system and voucher logic

  • £350k angel investment interest

Stamped out: a founder’s tale of the little loyalty app that could have been

end-to-end

branding

product strategy

  • Research, brand and MVP for a loyalty platform for small businesses

  • 100+ vendors and 5,000+ users at peak

  • Scalable design system and voucher logic

  • £350k angel investment interest

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Cassie literally saved our project.

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Cassie literally saved our project.

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Cassie literally saved our project.

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Cassie can take complex problems and turn them into intuitive, user-friendly design.

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Cassie can take complex problems and turn them into intuitive, user-friendly design.

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Cassie can take complex problems and turn them into intuitive, user-friendly design.

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She has been responsible for some of the most important visual designs the team at BAE Systems were involved in.

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She has been responsible for some of the most important visual designs the team at BAE Systems were involved in.

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She has been responsible for some of the most important visual designs the team at BAE Systems were involved in.

Hermes to Evri

Ready for review

From Hermes to Evri: shaking off a less than reputation with a UI and design system reinvention

design system creation

ui design

accessibility

  • Cross-platform UI refresh (web, app, POS)

  • Design system from scratch

  • New ways of working adopted org-wide

  • 3M+ 5-star Trustpilot reviews post-rebrand

From Hermes to Evri: shaking off a less than reputation with a UI and design system reinvention

design system creation

ui design

accessibility

  • Cross-platform UI refresh (web, app, POS)

  • Design system from scratch

  • New ways of working adopted org-wide

  • 3M+ 5-star Trustpilot reviews post-rebrand

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She brings energy, focus, commitment and an eye for detail that's always been appreciated by all who work with her.

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She brings energy, focus, commitment and an eye for detail that's always been appreciated by all who work with her.

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She brings energy, focus, commitment and an eye for detail that's always been appreciated by all who work with her.

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Her design approach is pragmatic and refreshing... she delivers real end-user value while keeping clients happy.

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Her design approach is pragmatic and refreshing... she delivers real end-user value while keeping clients happy.

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Her design approach is pragmatic and refreshing... she delivers real end-user value while keeping clients happy.

Jupita

Coming soon

Building a highly granular,multi-brand design system

Building a highly granular,multi-brand design system

Multi-brand icons that actually work!

Cheers for reading!

© 2025 Cassie Groos

Cheers for reading!

© 2025 Cassie Groos

Cheers for reading!

© 2025 Cassie Groos