Staff Product Designer

Story Terrace Inc.; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

A fintech startup in London is seeking a Staff Product Designer to shape the future of its product. You'll work closely with the co-founder, tackling complex problems and creating intuitive user experiences. Ideal candidates will have over 7 years of experience in product design, a strong design intuition, and a passion for delivering exceptional user-focused solutions. The role offers a competitive salary, equity package, and the chance to be part of a fast-growing team in an innovative environment.

Benefits

Competitive salary and equity package

Free lunch

Professional growth opportunities

Qualifications

• 7+ years of product design experience.
• Strong design intuition to balance innovation and traditional patterns.
• Experience in fintech, B2C products, or trust/safety-sensitive products is a plus.

Responsibilities

• Drive design direction across all product areas.
• Conduct user research to validate designs.
• Collaborate with engineers to solve complex problems.

Skills

Product design

User research

UI design

Prototyping

Visual communication

Job description

About Sling

We aim to create a world where sending and receiving money is effortless. Our app allows users to pay people, not numbers - no IBAN, account numbers, or sort code required. All you need is the recipient's name to send money.

Sling leverages blockchain technology to transfer in any currency almost instantaneously for a negligible fee. We’re in 150 countries and the app is available in the Android and iOS app stores. Sling is from Avian Labs, Inc., created by product builders and engineers from Monzo, Square, and Cash App.

About the role

We’re looking for a Staff Product Designer to help shape the future of Sling Money.

You’ll be the second designer on the team, working directly with Simon Amor (co‑founder and designer) across product, design, and strategy. This is a hands‑on role with high impact — your design decisions will shape a product used around the world.

You’ll be simplifying complex problems in a way that communicates ideas clearly, and designing solutions that feel effortless for users, no matter how intricate the problem.

Through close collaboration with product and engineering, you’ll craft experiences that are intuitive, elegant, and deeply user‑focused. You’ll bring a sharp eye for visual design and a strong sense of craft, with the ability to balance detail and speed. You'll create a truly global product with consideration for internationalization challenges across all surfaces.

And as one of the first designers at Sling Money, you’ll define not just the product, but the design culture as a whole.

Beyond product, you’ll also contribute to brand and marketing design, helping shape how Sling Money shows up in the world. From launch campaigns to landing pages, you’ll work on creating a visual language that’s consistent, expressive, and clear. We’re looking for someone who can bring the same level of craft and simplicity to external touchpoints as they do to the product itself.

Design at Sling Money

Design is central to how we think about and build products at Sling Money. We’re creating a clean, intuitive app that makes sending money as straightforward as sending a message. We’re not trying to impress with flash but aiming to remove friction to make something that just works.

From layout and interaction to loading times and accessibility, every detail is considered with simplicity and usability in mind. We obsess over simplicity — turning complex problems into clear, intuitive user experiences. You should be skilled at designing flows that just make sense, even for first‑time users. Your work should feel invisible: thoughtful UX that gets out of the way and lets people accomplish what they came to do.

What you’ll do

• Own and drive design direction across all product areas — from discovery to final implementation
• Simplify complexity with intuitive designs that work wherever in the world our users may live
• Spot opportunities for product improvements, design system evolution, and new features that enhance user experience, as well as smaller fast fixes
• Partner with engineers and data scientists to solve complex problems with clarity and craft
• Conduct user research to assess the validity of new and existing designs
• Champion quality, simplicity, and usability at scale
• Raise the bar for visual and interactive design across the company, considering motion, fluidity, and simplicity throughout
• Create visuals and assets for the Sling Money brand and product that can be used across the app, website, and marketing materials

What we’re looking for

• 7+ years of product design experience
• Thrives in ambiguity and loves turning messy problems into intuitive solutions
• Has examples of making data and research‑led decisions
• Writes sharp, jargon‑free copy and translates complex concepts to users in a simple, accessible way
• Strong design intuition. Knows when to innovate and when to follow traditional design patterns
• Balances big‑picture thinking with hands‑on execution — strategy, UI, prototyping
• Cares deeply about users, and advocates for their needs through design
• Passionate about creating beautiful, intuitive products
• Has a portfolio that shows systematic thinking, high visual polish, and real product impact

Bonus points

• Experience in fintech, B2C products, or trust/safety‑sensitive products
• Experience working in fast‑paced, growth teams
• Has been the first or early designer within a company
• Strong brand, video, or animation skills

Compensation, Perks & Benefits

• Competitive salary and equity package
• Opportunity to be a core part of a fast‑growing fintech startup
• Collaborative and innovative work environment with autonomy
• Free lunch in our breezy Shoreditch office and hybrid working flexibility
• Professional growth opportunities, team offsites, and events

If you’re excited to build products that people love — and design from first principles — we’d love to meet you.