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Senior Full Stack Developer & Senior Front-End Developer at Deus Market. We are an . Athens-based startup building a global tech ecosystem. that combines . FinTech, Logistics, and a next-generation B2B Marketplace platform. . Our vision is to create scalable digital infrastructure that connects businesses, payments, and logistics into one powerful platform used internationally.. As we scale our technology and expand globally, we are looking for . Senior Full Stack and Senior Front-End Developers. who want to help build the core systems of a fast-growing product from the ground up. You will work with modern technologies, solve real engineering challenges, and play a key role in shaping the architecture of a platform designed to operate at global scale.. 5+ years of experience. in . Software Engineering / Full Stack or Frontend Development. . Expert-level knowledge of . React, Next.js, TypeScript. . Strong experience with . Node.js (for Full Stack role). . Experience building and consuming . REST APIs. . Strong knowledge of . HTML5, modern CSS, responsive design. . Experience with . Tailwind CSS. . Experience with . state management (Redux, Zustand, Context API). . Experience with . PostgreSQL, Redis, and database design. . Familiarity with . cloud platforms (AWS, Azure or similar). . Familiarity with . Docker, Kubernetes and CI/CD pipelines. . Understanding of . modern e-commerce architectures and payment integrations. . Familiarity with . performance optimization and SEO best practices. . Strong . problem-solving skills and attention to detail. . Portfolio demonstrating . strong UI/UX implementation skills. . Fluent in . English & Greek. Design and develop . scalable backend APIs. using . Node.js and TypeScript. . Develop . modern, responsive web applications. using . React and Next.js. . Implement . pixel-perfect UI designs. from . Figma mockups. . Build . reusable frontend components and scalable architectures. . Work closely with . design and product teams. to create exceptional user experiences . Implement . state management solutions and API integrations. . Develop and maintain . modern web platforms and e-commerce systems. . Optimize . application performance, scalability, and frontend performance. . Ensure . cross-browser compatibility and accessibility standards. . Participate in . code reviews and architectural decisions. . Mentor . junior developers. and contribute to technical direction. Company Location: Greece.