Senior Full Stack Developer (.Net)

Job Description

Responsibility:

• Design, develop, and maintain scalable and high-performing web applications using .NET (C#, ASP.NET Core) for the backend and React for the frontend.

• Develop and consume RESTful APIs and other backend services.

• Write clean, well-documented, and efficient code following best practices and coding standards.

• Collaborate closely with product managers, designers, and other engineers to understand requirements and translate them into technical solutions for web and potentially mobile applications.

• Build reusable and efficient React components and frontend architectures.

• Contribute to database design and optimization (e.g., SQL Server, PostgreSQL).

• Participate in code reviews to ensure code quality and knowledge sharing across the team.

• Troubleshoot, debug, and resolve software defects across the full stack (backend and frontend).

Qualifications

• Minimum of 5+ years of professional experience as a Full Stack Developer.

• Strong proficiency in C# and .NET Core/.NET 8.

• Solid understanding of web development principles, including RESTful APIs, HTTP, and security best practices.

• ​​Extensive experience with React and its core principles.

• Experience with HTML, CSS, and modern JavaScript (ES6+).

• Familiarity with database systems (e.g., SQL Server, PostgreSQL, MySQL) and ORM frameworks (e.g., Entity Framework Core).

• Strong communication skills and ability to collaborate in a remote-first environment.

• Good in English (Spanish is a plus)

Additional Information

Why Join Us:

• Flexible work environment (hybrid or fully remote in the Spain).

• Opportunity to work with cutting-edge technologies in a fast-growing fintech startup.

• Strong engineering culture with a focus on quality, scalability, and innovation.

• A supportive, diverse, and dynamic team that values growth and learning.

• Work on a product that makes a real social impact on financial well-being.