Summary: Seeking a Senior Fullstack Developer to lead the design, development, and deployment of applications, providing technical leadership and mentoring to a team. Highlights: 1. Lead design and development of fullstack applications with modern UI frameworks 2. Provide technical leadership and mentorship to a team of developers 3. Collaborate on scalable system architectures and microservices solutions * English proficiency at B2 level or higher (spoken and written). * Availability to work in a hybrid model (2 days per week in the Lisbon office). **Key Responsibilities:** * Lead the design, development, and deployment of fullstack applications using .NET Framework/.NET Core and modern UI frameworks. * Provide technical leadership and mentorship to a team of developers, ensuring best practices in coding, architecture, and DevOps. * Collaborate with cross\-functional teams to deliver scalable system architectures and microservices\-based solutions. * Develop and maintain REST APIs, ensuring seamless integration with front\-end and back\-end systems. * Work with Optimizely CMS or similar DXP/CMS platforms to deliver content\-driven solutions. * Manage and optimize SQL and NoSQL databases for performance and scalability. * Utilize DevOps tools, such as GitHub workflows and actions, to streamline development and deployment processes. * Stay updated with the latest technologies and trends to drive innovation within the team. **Must\-Have Qualifications:** * A degree in Computer Science, Business Informatics, or a comparable qualification. * **At least 8 years of experience as a C\# .NET Developer (.NET Framework / .NET Core).** * **Hands\-on experience with DXP/CMS platforms like Optimizely, Umbraco or equivalent.** * Proficiency in SQL and NoSQL databases. * Solid knowledge of REST APIs. * **Experience with modern UI frameworks: React and Next.js (mandatory).** * **Strong technical leadership experience, with proven ability to guide teams, make architectural decisions, and communicate effectively**. * Familiarity with DevOps tools, including GitHub workflows and actions. * **Solid experience in designing scalable system architectures and microservices.** * **Engineering\-focused mindset: able to talk about performance, dependency management, communication, problem solving, and investigation.** **Nice\-to\-Have Qualifications:** * Experience with Azure or other cloud platforms. * Experience with ASP.NET Core / Web API. **What can you expect from us?** Mind\-blowing workplace culture. You will be integrated in a professional, dynamic and collaborative team. **100% Remote opportunities** We want you to have the flexibility to work where you feel most comfortable and productive. **International Career** * You can expect professional growth and to be connect with the world. * We are represented in Portugal, Belgium, Luxembourg, and Denmark. * And with projects in many other countries: Netherlands, Luxembourg, Singapore and in the United States of America (and a lot more is coming…) **Extra Benefits \& Perks** If you wish to work with us and you are outside European Union (good news…) we are a Tech Visa Company, We will help! **As a plus, we provide Health and Life Insurance.**