Company: Principle HR
Location: London
Job Description:
Senior UX / Product Designer – Contract | Central London
A rare contract -PAYE seat has opened on the design team behind advertising and monetisation products used by businesses at global scale. £88,000 – and the work earns it.
This isn’t consumer app design. You’ll be shaping complex, data-dense tools, the kind where the craft isn’t in making things look pretty, it’s in making something genuinely intricate feel obvious. Small senior team, one seat, and a high bar for who fills it.
What you’ll be doing
- Owning design end to end – turning real, messy user needs into clear journeys, mock-ups and prototypes that actually get built.
- Working closely with UX researchers to design for what users need, not what we assume they need.
- Sitting shoulder to shoulder with product and engineering, staying in the detail so what ships is what you drew.
- Helping the design system grow, so good decisions get made once and reused.
- Designing across both desktop and mobile.
What you’ll bring
- 4-6 years in UX, product or interaction design, on complex or enterprise-grade tools rather than purely consumer work.
- Real depth in Figma – it’s where you’ll live.
- A portfolio that shows your thinking, not just your screens. Strong complex-tooling work from any domain counts; it needn’t be advertising.
- Systems thinking, and the knack for explaining a thorny problem – and your way through it – so designers and non-designers both follow you.
- A working command of user-research practices.
- A degree in design, UX or a related product field.
- The kind of person a small team is glad to have in the room. Here, how you collaborate counts as much as how you design.
The Offer:
- Attractive Annual Salary up to £88,000 per year
- 10-month contract (PAYE) to begin with, with real scope to extend
- Hybrid – 3 days a week on-site in central London – Tues, Wed, Thursday
- Inside IR35, PAYE, paid weekly through Principle HR
Som, Principle HR |
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Posted: September 22nd, 2026