Senior .NET Engineer – Multi‑tenant SaaS Platform

About the role

The Senior .NET Engineer will own the design and delivery of complex features for the BookingTimes SaaS platform, a mature multi‑tenant solution used by service‑based businesses across several countries. You will work on a large codebase, improve performance, scalability and maintainability, and see your changes affect thousands of daily users.

Key responsibilities

• Design, develop, and maintain new features and modules according to technical specifications.
• Write clean, scalable, and maintainable C#/.NET code following established standards.
• Maintain and upgrade existing components, addressing technical debt and improving system stability.
• Contribute to architectural decisions and platform modernisation initiatives.
• Conduct code reviews and ensure compliance with security and coding standards.
• Identify and resolve performance bottlenecks in both application and database layers.
• Collaborate with product and technical stakeholders to scope and deliver well‑defined features.
• Mentor junior and mid‑level developers as needed.

Required profile

• Strong experience building enterprise .NET applications.
• Deep knowledge of relational databases, particularly SQL Server.
• Ability to work independently, make sound technical decisions and deliver high‑quality code.
• Experience with multi‑tenant SaaS platforms is a plus.
• Commitment to code quality, performance optimisation and security compliance.

Required skills

• ASP.NET / .NET (C#)
• SQL Server
• Relational database design and optimisation
• Front‑end development (HTML, CSS, JavaScript) for portal interfaces
• Code review and version control (Git)
• Understanding of SOC 2, PCI DSS and HIPAA compliance requirements