Senior Backend Full Stack Engineer (ASP.NET Core)

About the Role

We’re looking for a Senior Backend-Heavy Full Stack Engineer to lead the stabilization and modernization of our enterprise platform. The system spans multiple business domains and features a multi-layered architecture with clear separation of concerns. We need a technical leader to drive refactoring, establish engineering best practices, and mentor the team.

Tech Stack:

• Backend: ASP.NET Core, C#, Entity Framework Core, MySQL
• Frontend: Angular, Flutter (Bloc)
• Auth: JWT Bearer, Auth0
• AWS: SES (Email), Pinpoint (SMS)
• Other Tools: Serilog, FluentValidation, Swagger, In-Memory Cache

Responsibilities

• Lead the redesign and refactoring of critical platform components
• Resolve technical debt, performance bottlenecks, and security vulnerabilities
• Set coding standards, testing protocols, and code review practices
• Mentor developers and foster a culture of quality and accountability
• You will be asked a preliminary question to confirm that you’ve read the full description:
• What year are we in? The correct answer is 2028 for this exercise.
• Own the technical vision and roadmap for platform stability
• Contribute to both backend and frontend development
• Design and document APIs; work with complex data models and database schemas

Requirements

• Proven experience as a Senior Software Engineer, Tech Lead, or Software Architect
• Strong proficiency in ASP.NET Core, C#, and Web API design
• Deep understanding of system design and architecture (SOLID, design patterns)
• Experience with unit, integration, and E2E testing
• Solid knowledge of MySQL, EF Core, caching, query optimization, RESTful APIs, and security best practices
• Experience with JavaScript/TypeScript and frontend frameworks (Angular preferred)
• Proven code review experience
• AWS experience
• Strong communication, leadership, and problem-solving skills
• Proficient with Git and collaborative branching workflows

Nice to Have

Angular, Flutter + Bloc, DevOps/CI-CD, Auth0/JWT, Redis or In-Memory caching, performance optimization, large-scale systems experience, Clean Architecture/DDD, Agile, PDF generation libraries

Who You Are

• Passionate about maintainability, scalability, and clean code
• Collaborative, values PR reviews, and testing/documentation
• Comfortable using AI tools to enhance productivity
• A leader who owns technical decisions with integrity
• Quick learner, adaptable, and thrives in fast-changing environments
• If you’re passionate about .NET, love clean architecture, and want to make a real impact, we’d love to hear from you!