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Senior Fullstack JavaScript (React + Node.js + React Native) Developer (Europe) at Jobgether. This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Fullstack JavaScript (React + Node.js + React Native) Developer in Europe.. This role offers an exciting opportunity to build high-impact web and mobile applications using modern JavaScript technologies. You will work in a collaborative environment with a focus on clean code, performance, and user experience, contributing to both frontend and backend development. As a Senior Fullstack Developer, you will lead development projects from concept to deployment, integrating RESTful APIs and third-party services while leveraging AI-powered tools to improve productivity. You will collaborate closely with designers, product owners, and QA engineers, continuously improving development practices and delivering high-quality solutions for diverse platforms. This fully remote role provides scope for technical leadership, innovation, and career growth across Europe.. . Accountabilities. As Senior Fullstack JavaScript Developer, you will:. . Design, develop, and maintain scalable web and mobile applications using React, Node.js, and React Native.. . Implement and integrate RESTful APIs and third-party services efficiently.. . Collaborate with product owners, designers, and QA engineers to deliver high-quality features.. . Write clean, maintainable code with a strong focus on performance, usability, and user experience.. . Participate in agile ceremonies, code reviews, architecture discussions, and technical improvement initiatives.. . Troubleshoot, debug, and enhance both frontend and backend systems.. . Contribute to best practices, documentation, and knowledge sharing within the development team.. . The ideal candidate will have:. . 5+ years of professional experience with JavaScript/TypeScript.. . Strong hands-on experience with React.js and Node.js.. . Solid experience with React Native and mobile development best practices.. . Proficiency in writing and consuming RESTful APIs.. . Experience with MongoDB, PostgreSQL, or similar databases.. . Familiarity with Git, CI/CD pipelines, and Agile/Scrum development methodologies.. . Excellent problem-solving, communication, and collaboration skills.. . Self-driven and able to thrive in a fully remote, distributed team environment.. . English proficiency at B2/C1 level.. . Recent photograph included in the CV (mandatory for application).. . Company Location: Poland.