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Senior Flutter Developer at Lemon.io. Location Information: United States. Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than . Lemon.io. — the marketplace that connects you with hand-picked startups in the US and Europe.. . We are looking for a Senior Flutter Developer for one of our clients.. . From the client: We are developing a mobile application that transforms advanced STEM education into an engaging, accessible, and motivating experience. Rather than serving as a basic content delivery tool, the product combines structured learning paths, progression systems, interactive problem-solving, and a strong sense of personality. All of this is delivered through a polished, gamified mobile UX designed primarily for teens and young adults.. . Involvement: 25h/week. Project type: Part-time. Duration: 3–4 months. Client timezone: (GMT -8:00) Pacific Time (US & Canada). Overlap: 3 hours. . This position is for U.S.-based candidates, but we also have other positions for Senior Software Engineers from 75+ countries.. . Requirements:. . . 4+ years of software development experience. . 3+ years of experience with Flutter. . 3+ years of experience with Dart. . Experience shipping iOS and Android apps. . Strong understanding of app architecture, state management, performance, and backend integration. . Ability to work through ambiguity and translate product ideas into real features. . Interest in polished consumer products, interactive learning, or STEM-related applications. . .  . . . Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.. . Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.. . Strong self-organizational skills — ability to work full-time remotely with no supervision.. . Reliability — we want to trust you and expect that you won’t let us and the client down.. . Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly.. . . Sounds good for you? Apply now and join the . Lemon.io. community!. . NOT YOUR TECH STACK?. . We have a variety of projects, so if you have 4+ years of commercial software development experience and are proficient in AI Agent Architecture, AI Automation Architecture, AI Engineering, Site Reliability Engineering, Platform Engineering, React & Python, React & Golang, Golang, React & Java, React & Ruby, Ruby, PHP & Vue, Vue & Node.js, React & .NET, Android & iOS, iOS & Swift, Blockchain (Ethereum/Ethers.js/Wagmi/Viem/Solana), Angular & Node.js, Vue & .NET, Python & Vue, DevOps, MLOps, Data Science, Angular & PHP, Angular & .NET, Symfony & React, Symfony & Vue, Symfony & Angular, Python, Symfony & JavaScript & Next.js & TypeScript, Data Analysis, React & PHP, Data Engineering, Project Management, Product Management, QA Automation, QA Manual, Embedded Software Engineering, React Native & Node, React Native & React, React Native & Ruby, React Native & Python, WordPress, Android, Data Annotation, Angular, Python & Node, React & Node.js, Java & Spring, Svelte & Python, Svelte & Node.js, Svelte & TypeScript, Rust, Shopify & JavaScript, Vue & Nuxt, PHP & Laravel, UI/UX Design, Animation, Graphic Design, React & Node & React Native, .NET & C#, Electron, Scala, C++, Unreal Engine & C++, Python & LLM, Unity, or Machine Learning Engineering, we would be happy to connect with you and match you with a project that fits your experience.. . We work with developers from 75+ countries across Europe, Latin America, North America (the U.S. and Canada), selected countries in Asia (Japan, Singapore, South Korea, the Philippines, Indonesia, Malaysia, Vietnam, Thailand, and Israel), Oceania (Australia, New Zealand, and Papua New Guinea), and Africa (including Morocco and South Africa).. .