Senior Software Engineer

Keywords: C# .NET;
Back-end; MS SQL / T-SQL;
On-Prem Systems;
Distributed Services;
Secure Transaction Platforms

Location:

Basel-City (on-site)
Salary: CHF 110'000 – 130'000 p.a., depending on seniority

A long-standing private bank in Basel is seeking a Senior Software Engineer to strengthen its technology team. The position focuses on backend development for a customer-facing digital interaction platform, central to the bank’s secure online services. All systems run fully on-premises, relying on Microsoft SQL Server, T-SQL, and a modern .NET environment. You will work closely with engineering leads and domain experts to ensure reliability, performance, and security across core banking processes.

• Develop and enhance backend components and services using C# and .NET
• Design and optimise data models, stored procedures, and queries on MS SQL Server
• Contribute to the evolution of a high-availability digital client portal
• Collaborate with cross-functional teams (architecture, security, operations)
• Maintain integration points with internal systems and third-party services
• Ensure code quality, testing discipline, and documentation standards
• Support continuous improvement of internal engineering practices

• Several years of professional experience in backend software development in financial services
• Strong command of C#, .NET, and SQL Server (including T-SQL)
• Background working with on-prem enterprise systems
• Understanding of security and performance considerations in financial environments
• English proficiency suitable for daily collaboration

This is an opportunity to join a stable and respected financial institution with a long-term perspective on technology and engineering excellence. If you see yourself contributing to robust, mission‑critical backend systems, your application would be welcomed.