All User Testing Experts in California
Designli
5(16 reviews)Building apps is hard... when you're distracted.
Top awardedWhen hiring an app or web development team to build custom software, one variable matters most: are the developers fully dedicated to your success , or are you one client of many? Designli brings together designers, engineers, and business minds into on-demand, dedicated product teams that pour themselves, full-time, into the success of your app or web-app initiative. Existing as your dedicated software engineering department, we'll work together to solve your most pressing business problems with custom software. How it Works, and What We Can Build: Designli designs, develops, and launches beautiful apps and web-apps that you'll be proud to own, with a process that makes sense. Most importantly, we'll do this with a team that is assigned full-time to your project. With a step-by-step process, we'll begin by creating a clickable simulation of the User Interface of your app or website, and a development-ready backlog with each feature defined, estimated, and ready to code. Entrepreneurs use this output for fundraising. Business leaders use it for internal buy-in and market validation. When you choose to move into Development, our staff will be assigned full-time to you, and this team will be composed of the disciplines you need. Left alone, designers will create art projects. Engineers will create science fair gizmos. Business minds will create spreadsheets. Your development team will include all three, singularly focused on your success. For more information and to see our extensive work portfolio, visit https://designli.coLooking for work in User TestingLocated in Greenville, United States (+2)From €5,000 for User TestingWorked in Banking & Financials (+9)Speaks English51-200 membersRHILLANE Marketing Digital
4.9(117 reviews)Grow Big, Grow Right.
Highly recommendedTop awardedChez RHILLANE Marketing Digital, nous ne faisons pas que promouvoir votre marque : nous révélons tout son potentiel. En tant qu'agence de marketing digital 360°, nous avons accompagné plus de 615 clients à travers le monde, généré +50 millions de dollars de chiffre d’affaires pour nos clients, et géré +15 millions de dollars en budgets publicitaires. Avec des bureaux à la fois au Maroc et en Californie, aux États-Unis, nous sommes fiers de servir une clientèle internationale en apportant des solutions personnalisées et performantes. Des résultats qui parlent d’eux-mêmes. Avec 280 clients Meta Ads, +80% de nos campagnes affichant un ROAS supérieur à 7, et un taux de satisfaction de 96%, nous transformons les ambitions de nos clients en succès mesurables. Nos services vont de la création de sites web élégants et intuitifs, au SEO qui propulse vos classements, en passant par des campagnes publicitaires Meta, Google, et TikTok ultra-ciblées. Chaque stratégie est conçue pour capter l’attention, générer des conversions, et fidéliser vos clients. RHILLANE Marketing Digital est bien plus qu’une agence digitale : nous sommes votre partenaire de croissance. Grâce à nos outils de pointe, notre créativité audacieuse et une expertise ancrée dans les données, nous accompagnons nos clients pour surmonter leurs concurrents et atteindre des sommets. Rejoignez les entreprises qui ont déjà transformé leur présence en ligne avec nous. Votre succès commence ici.Looking for work in User TestingLocated in Torrance, United States (+2)From €1,000 for User TestingWorked in Clothing & Accessories (+18)Speaks English, Arabic(+2)11-50 membersRhillane
5(22 reviews)Grow Big, Grow Right.
Highly recommendedTop awardedAt Rhillane, we don’t just market your brand—we ignite its full potential. As a full-service digital marketing powerhouse, we’ve helped over 615 clients worldwide, delivering +50 million dollars in client revenue and managing 15+ million dollars in ad spend. From dynamic web design and UI/UX to game-changing SEO, social ads, 2D/3D animation, and lead-generating email campaigns, our multidisciplinary experts ensure every aspect of your online presence works together to drive extraordinary growth. Our results speak louder than words. With 280 Meta Ads clients, a proven track record of +80% campaigns achieving a ROAS of 7 or higher, and a 96% client satisfaction rate, we combine cutting-edge tools, creative brilliance, and deep analytics to create tailor-made campaigns that don’t just attract clicks—they build connections. Whether it’s crafting scroll-stopping social content, executing high-ROI ad campaigns, or designing sleek, user-focused websites, our work is designed to captivate, convert, and keep your audience coming back. At Rhillane, we’re more than a digital agency—we’re your growth partner. With us, you gain access to bold ideas, strategic expertise, and a team passionate about pushing your brand to new heights. Join the ranks of top-performing businesses we’ve transformed, and let’s write your success story together. Your breakthrough starts here.Looking for work in User TestingLocated in Torrance, United States (+2)From €1,000 for User TestingWorked in Education (+16)Speaks English, Arabic(+2)11-50 membersEurisko
4.8(12 reviews)Pioneering digital innovation
Eurisko is a multi-national software development and consultancy firm based in UAE, Saudi Arabia, Lebanon, Cyprus and US. With more than 13 years of experience and hundreds of success stories, Eurisko offers services ranging from Mobile App Development, Enterprise Web Development and Artificial Intelligence, to Game Development, Mixed Reality, UI/UX Design and Smart Cities / IoT. To position our company as the pioneer of digital innovation in the region by creating excellence in our people and forging the digital future of our clients and partners. Our mission is to empower digital transformation by delivering cutting-edge solutions and world-class digital services to our clients & partners. Our goal is to reshape their success, providing them with a distinctive competitive advantage, unlocking limitless possibilities, and driving meaningful impact in their industry landscapes. Eurisko has a proven history of excellence in various domains and has been at the forefront of driving progress in Artificial Intelligence and Data Analytics for several years. Our proficiency in these areas allows us to harness state-of-the-art algorithms and data-driven insights, enabling us to deliver groundbreaking solutions to our clients. At Eurisko, our steadfast dedication to pushing the limits of innovation has firmly established us as a pioneering influence at the intersection of technology and creativity within the Middle East.Looking for work in User TestingLocated in Santa Clara, United States (+2)From €1,000 for User TestingWorked in Banking & Financials (+2)Speaks English, Arabic(+1)51-200 membersLinnify
5(8 reviews)Simplifying life through innovation.
Top awardedLinnify is an awarded global technology partner , founded in 2016, with offices in Europe and the U.S. We empower visionary companies to accelerate digital product development . Faster, smarter, and more reliable than thought possible. From growing startups to established enterprises, we help turn bold ideas into scalable, user-centered digital solutions that drive measurable business impact. Our cross-functional teams deliver end-to-end capabilities in: - product strategy and validation - UX/UI design - custom software development (web and mobile) - AI and machine learning development - data engineering - cloud-native solutions - XR (AR/VR) applications - team augmentation Our validation-driven development approach ensures every product is aligned with actual market needs , minimizing risk while accelerating time-to-market. With a proven track record of building 80+ digital products across industries such as healthcare, logistics, education, automotive, and pharma , Linnify is present through strategic partnerships in major tech hubs like Austin, Berlin, and London. Our commitment to quality has earned us global recognition, including FT1000 ranking, Clutch Top 100, and ISO 27001 certification. Whether you’re seeking an AI development partner, looking to validate a product idea, or scaling your development capabilities, Linnify delivers with agility, transparency, and lasting impact through dedicated product teams. Let’s simplify life through innovation. Together.1 work in User TestingLocated in Austin, United States (+1)From €5,000 for User TestingWorked in Education (+9)Speaks English, Romanian11-50 membersQuantum IT Innovation
5(54 reviews)Top Mobile & Web Development | AI Solutions | Digital Marketing Services
Highly recommendedQuantum It Innovation is a world-class IT firm Specialising in Business optimisation solutions, Web, App Development & Digital Marketing for B2B and B2C agencies and companies across the globe. Quantumitinnovation has proved its strong presence with operations in Australia for Many years. Our Services - Mobile app development - Web app development - artificial intelligence consultancy - Android App Development - Professional SEO Services - Digital Marketing - custom app development - IOS App Development Company - Robotic Process Automation (RPA) - Social Media Marketing ServicesLooking for work in User TestingLocated in Dallas, United States (+5)From €1,000 for User TestingWorked in Sports (+14)Speaks English, Hindi201-500 membersSkillian
5(8 reviews)Payment Integration & Fintech Automation Experts
Highly recommended🏆 WHY SKILLIAN We’re not just developers — we’re your fintech engineering partner. At Skillian, we specialize in building payment systems, financial automations, and scalable backend platforms that power real business growth. From onboarding flows to KYC, payouts, and compliance, we handle the hard parts so you can scale with confidence. 📺 Watch our 40-second intro video: https://www.youtube.com/watch?v=3YXJJ5UWVak ✅ Fast onboarding — start in under a week ✅ Transparent rates, agile delivery, clear communication ✅ Outcome-focused — we deliver working software every sprint ⚙️ WHAT WE DO BEST 💳 Custom Payment Integrations (Stripe, Adyen, Braintree, Wise, Payoneer) 🔄 Financial Automation (billing, reconciliation, payouts, reporting) 🏛 SaaS & Marketplace Platforms (multi-vendor, subscriptions, access control) 🔒 KYC/AML Workflows, Tax Handling, Compliance Infrastructure 📊 Real-Time Dashboards & Back Office Tools ☁ Cloud-Native Systems (GCP, AWS, Kubernetes) 💻 Frontend (Angular, Ionic, Flutter) & Backend (Java, Node.js, Python) We build audit-friendly, secure, and scalable systems tailored to your business. 📈 OUR TRACK RECORD ✔ 50+ successful projects ✔ Trusted by Upwork Inc., Greek government platforms, NGOs, and fast-growing startups ✔ 10+ years of engineering excellence, Oracle Certified Java Engineers ✔ Apps featured on Behance & Play Store ✔ 100% remote delivery — Europe, US, and beyond Our team integrates fast, solves problems quickly, and delivers measurable progress. ✨ WITH SKILLIAN, YOU GET ⭐ A senior, dedicated team with fintech expertise ⭐ Proactive product + tech strategy from day one ⭐ Agile development with clear milestones and roadmaps ⭐ Long-term support that grows with your business 📩 Let’s talk — your project deserves a skilled team that delivers real results.Looking for work in User TestingLocated in Nork-Marash, ArmeniaFrom €4,000 for User TestingWorked in Banking & FinancialsSpeaks English, Armenian(+1)11-50 members