Senior Fullstack Engineer (.NET/React + Umbraco CMS)

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Fullstack Engineer (.NET/React + Umbraco CMS) in Brazil.

This role offers the opportunity to work across the full web development stack, contributing to the design and delivery of scalable digital solutions for enterprise-level clients. You will be part of a fast-paced, collaborative environment where engineering quality, maintainable architecture, and user experience are key priorities. The position involves building both backend services and modern frontend interfaces while integrating CMS-driven platforms and third-party APIs. You will collaborate closely with designers, strategists, and fellow engineers to deliver high-impact digital products across multiple client projects. The role is well-suited for a developer who enjoys technical ownership, variety of work, and working in a dynamic agency environment. This is a remote position with exposure to international teams and complex, real-world engineering challenges.

• Design, develop, and maintain full-stack web applications across multiple client projects in a fast-paced delivery environment.
• Build and optimize backend services using C# and .NET Core, ensuring scalability and performance.
• Develop responsive frontend applications using React (or Angular) with strong HTML, CSS, and JavaScript fundamentals.
• Integrate CMS platforms such as Umbraco, along with APIs and third-party services to support dynamic digital experiences.
• Participate in technical design discussions and contribute to architectural decisions and solution design.
• Conduct code reviews and ensure adherence to engineering best practices, testing standards, and quality guidelines.
• Collaborate with multidisciplinary teams including designers, product strategists, and other engineers throughout the development lifecycle.
• Maintain technical documentation and support continuous improvement of development processes and workflows.
• Work independently while proactively communicating progress, risks, and technical recommendations.

Requirements:

• 5+ years of experience in software development roles.
• Strong hands-on experience with C# and .NET Core in production environments.
• Solid frontend development skills using React (Angular also accepted) with strong HTML, CSS, and JavaScript expertise.
• Experience building and consuming REST APIs in scalable applications.
• Proven experience integrating CMS platforms, with strong preference for Umbraco.
• Experience working with Microsoft SQL Server and relational database design.
• Familiarity with Git workflows and CI/CD pipelines.
• Ability to work independently in client-facing, deadline-driven environments.
• Strong English communication skills, both written and verbal.
• Nice to have: experience in digital agencies, AWS cloud services, Node.js, performance optimization, accessibility standards, and AI-assisted development tools.

Benefits:

• Fully remote work with flexibility to operate from anywhere.
• Competitive USD-based compensation aligned with international market standards.
• Paid time off to support rest, balance, and well-being.
• Opportunity to work on high-impact projects with leading U.S. companies.
• Autonomy in managing your schedule with a strong focus on results.
• Access to a global network of experienced engineering professionals.
• Collaborative and high-skill environment that encourages continuous learning and growth.