Senior .NET Developer – Backend Engineering

About the role

We are seeking a Senior .NET Developer to join our backend engineering team and help shape the core of Thawani's fintech platform. You will design, build, and maintain secure, high‑performance services while collaborating closely with product owners, QA, and fellow engineers.

Key responsibilities

• Design, develop, and maintain .NET Core RESTful APIs and services.
• Lead technical design, translating business requirements into robust backend solutions.
• Build and optimise data layers using MS SQL Server, Entity Framework Core, and Dapper.
• Integrate external systems via REST and SOAP APIs with OAuth, JWT, and other auth methods.
• Write clean, testable code following SOLID principles and clean‑architecture guidelines.
• Review code, mentor junior developers, and ensure high code quality.
• Identify, troubleshoot, and resolve issues across development, testing, UAT, and production.
• Implement secure coding practices aligned with the OWASP Top 10 for fintech applications.
• Participate in technical discussions, task estimation, and continuous improvement of backend architecture.
• Leverage AI‑assisted tools such as GitHub Copilot and Claude to boost productivity.

Required profile

• Strong proficiency in C#.NET Core, and ASP.NET Core Web API.
• Deep understanding of the software development lifecycle, SOLID principles, and clean architecture.
• Experience designing and integrating third‑party and internal APIs.
• Solid knowledge of authentication and authorization protocols (OAuth, JWT).
• Proven ability to design scalable, maintainable, and testable backend systems.

Required skills

• C#
• .NET Core
• ASP.NET Core
• Web API
• REST
• SOAP
• OAuth
• JWT
• MS SQL Server
• Entity Framework Core
• Dapper
• OWASP Top 10 security practices
• GitHub Copilot
• Claude (AI development tool)