UI/UX Design

Product UI/UX design built for shipping

ClefDev is a UI/UX design agency that takes digital products from research to developer-ready files. We design iGaming and sportsbook interfaces, fintech dashboards, crypto wallets, mobile apps and complex product UIs for clients across the EU, US, Asia and LATAM. The team is deliberately senior and compact: the designers who run discovery are the same people polishing the final components, so nothing gets lost between strategy and screen.

UX research and user flows that remove guesswork

Every engagement starts with evidence. We run stakeholder interviews, competitor teardowns and analytics reviews, then map user flows for the journeys that matter: onboarding, deposit, checkout, upgrade, withdrawal. For regulated verticals we build compliance into the flow from the first wireframe, so KYC steps, age gates and responsible-play prompts feel native rather than bolted on. The output is a blueprint your whole team can pressure-test before a single pixel is drawn.

Custom UI design with dark and light themes

Our product design services cover the entire interface layer: layout grids, component styling, data visualisation, iconography and micro-interactions. Dark and light themes are designed as first-class variants from day one, driven by semantic colour tokens that keep contrast accessible in both modes. If your product needs a stronger visual foundation first, our brand identity design team builds the logo system, palette and typography the UI inherits.

Design systems that scale with your roadmap

A design system is what separates a pretty mockup from a product your team can extend without us. ClefDev delivers tokenised Figma libraries with typography scales, spacing rules, colour primitives and documented components covering every state and variant. Tokens map cleanly to React, Tailwind or your in-house stack, which makes handoff to our development team or your engineers genuinely fast. Companies also hire us to audit and rebuild design systems that have drifted out of sync with production.

Dashboard & product UI that turns complexity into clarity

For data-dense products we concentrate on the screens that move metrics: onboarding, empty states, pricing pages, billing and the core dashboard users see every day. We design for activation and retention, pairing clear information hierarchy with upgrade paths that feel helpful instead of pushy. Engagements typically run four to eight weeks and include clickable prototypes ready for user testing and investor demos. Building a SaaS product specifically? See our dedicated SaaS product design page.

iGaming UX from a team that knows the vertical

iGaming UX has rules of its own: dense game lobbies, real-time odds, bonus mechanics, multi-currency wallets and strict regulatory overlays. ClefDev has shipped casino, sportsbook and sweepstakes products, so we design lobbies that surface the right games fast, bet slips that work one-handed on mobile and promotion systems that drive deposits without confusing players. If you need the full product, our sports betting design service covers odds boards, live betting and cash-out UX in depth.

Prototypes, testing and developer handoff

Interactive Figma prototypes are part of every project, used for moderated usability tests and quick validation rounds before development starts. Handoff is treated as a deliverable in its own right and always includes:

• Organised Figma files with named layers and auto-layout throughout
• Design tokens exported as JSON for direct engineering use
• Redlines, spacing specs and interaction notes per component
• Asset exports in SVG, PNG and Lottie where motion applies

Why hire ClefDev as your UI/UX design agency

Teams choose ClefDev because we combine product thinking with vertical expertise that generalist studios lack, particularly in iGaming, fintech and Web3. Projects are scoped as fixed packages with weekly demos, so you always know what ships next and what it costs. Whether you need a single feature redesigned, a full product UI overhaul or a design system built from scratch, the first step is a short discovery call and a free interface audit.