Vermillion
Vermillion is a product development and engineering partner for founders and growing app businesses. We bring product strategy, UX/UI design, mobile app development, web development, and subscription monetization together under one accountable team. We start with how your business makes money and where customers find value. From there, we help shape the roadmap, improve onboarding, understand user behavior, and strengthen retention. Our senior team owns architecture, development, testing, releases, and ongoing maintenance, with fractional CTO guidance for the decisions that shape your product. For subscription businesses, we provide RevenueCat integration and migration, in-app purchases, paywall implementation and A/B testing, subscription analytics, and web billing. We connect monetization to the full customer journey, from the first moment of value to renewal. Our expertise spans native iOS and Android development, React Native, web applications, and backend systems. Our clients include PicklePlay, ToyTrader, Buildove, and App Growth Summit. Whether we’re taking over an existing app, improving a growing product, or working alongside your internal team, we take responsibility for keeping engineering and product moving together. You get a dependable technical partner and more time to focus on customers, partnerships, and growing the business.