About the RoleStaffingAbroad is seeking a Principal Backend Engineer/ Senior Software Engineer to join a #1 US-based FinTech & Crypto company. This role is ideal for a highly skilled backend developer who excels in C#/.NET and has a strong focus on writing maintainable, scalable, and secure code. You will play a key role in shaping architecture, ensuring system performance, and embedding best practices while working in a fast-paced and innovative environment.This is a 100% remote, full-time role Salary $5.000USD to $7.000 USDWhat You Will DoDevelop and Maintain Applications: Build, enhance, and maintain secure, scalable backend services using C#/.NET and integrate with APIs like Plaid, Dwolla, and Treasury Prime.Shape System Architecture: Contribute to system design, ensuring performance, scalability, and security across FinTech applications.Write Quality Code: Implement and test maintainable, well-documented code, with a focus on automation and software best practices.Support Production Systems: Monitor and troubleshoot production applications to ensure high availability and quick issue resolution.Collaborate Across Teams: Work closely with front-end, QA, product, and IT teams, while mentoring junior engineers.Focus on Security and Compliance: Embed security best practices and maintain compliance with FinTech regulations.What You Will NeedStrong Technical Expertise:Solid foundation in design patterns, software development best practices, and principles like SOLID and Clean Code.Proficiency in C#/.NET, ASP.NET MVC/WebAPI, and Object-Relational Mappers (ORMs).Strong understanding of MSSQL database design and optimization.Familiarity with asynchronous microservices architecture and distributed systems.Experience with modern front-end and server-side technologies such as Node.js and React.Commitment to Software Quality:Hands-on experience with unit testing, mocking, integration testing, and ensuring code coverage.Familiarity with CI/CD pipelines, particularly in Azure DevOps.Proficient in version control systems, especially Git.Experience and Education:6+ years of back-end software development experience.Bachelor’s degree in Computer Science or a related field (preferred).Collaboration and Communication:Excellent written and verbal communication skills.Ability to work effectively with team members and stakeholders.Enthusiasm for contributing to a collaborative, dynamic team environment.Cultural Fit:Passion for innovation, accountability, and teamwork.Alignment with a culture that prioritizes excellence in FinTech and Crypto solutions.Plusses IncludeExperience with iDesign architecture methodology.Familiarity with cloud platforms such as Azure, including their tools and services.