Declan Brennan

Senior Product Designer at Quayside Technologies · Mobile design · Android, prototyping

Quayside Technologies

Manchester, UK · GMT (UTC+0)

7+ years experience

University of Cambridge

English, German

Messaging unavailable

Overview

I've spent 7 years on mobile design - first at NatWest, now at Quayside Technologies. Cut support tickets about mobile by 24% with clearer copy and states. Before that: KPMG and NatWest. Most at home with Android and motion design.

Good reasons to reach out

Second opinions on prototyping decisions
Questions about mobile design
Thoughtful intros to people in my field

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Agency or outsourcing pitches
Crypto token projects
Generic networking requests

Travels often; replies within 48 hours

Skills

iOSmotion designFigmaprototypingAndroid

Experience

Senior Product Designer
Feb 2026 - Present
Quayside Technologies · 8 mo · Full-time · Manchester, UK
- Built a component library 26 engineers ship with every day.
- Shipped the mobile redesign that lifted task completion 25%.
- Ran 116 usability sessions and turned them into a research repository.
UX Researcher
May 2023 - Feb 2026
KPMG · 2 yr 9 mo · Full-time · Manchester, UK
- Shipped the mobile redesign that lifted task completion 21%.
- Built a component library 42 engineers ship with every day.
UX Researcher
Jan 2020 - May 2023
NatWest · 3 yr 4 mo · Full-time · Manchester, UK
- Ran 56 usability sessions and turned them into a research repository.

Projects

Side project: a recipe search engine

2026

Built with Figma and iOS. 3963 people used it last year.

References

No references yet.

Education

University of Cambridge
BA, Visual Communication
2015 - 2018

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