Lead C# Developer - Banking Solutions (Onsite France)

avacone Iberia; Mulhouse; On-site; EUR 55,000 - 75,000; Full time

Job summary

A prominent IT services company in Mulhouse, France, is seeking an experienced Senior / Lead C# Developer to design and deliver enterprise-grade software solutions for a major banking client. This role combines hands-on development with technical leadership in a collaborative environment. Ideal candidates will have strong experience in C# and the .NET ecosystem, along with a proven track record in managing delivery and stakeholder engagements. This position requires on-site work at the client location and offers an exciting opportunity to contribute to impactful projects.

Qualifications

• Strong commercial experience with C# and the .NET ecosystem.
• Proven experience in a Senior and/or Lead engineering role.
• Solid understanding of enterprise application architecture.
• Strong knowledge of relational databases and SQL performance fundamentals.

Responsibilities

• Design, develop, and maintain secure, scalable applications using C# and .NET.
• Act as technical lead for development activities on client engagements.
• Take ownership of solution architecture, code quality, and technical standards.
• Lead and mentor developers through code reviews and best practices.
• Ensure solutions comply with client security, risk, and regulatory requirements.

Skills

C#

.NET ecosystem

RESTful APIs

SQL Server

Oracle

PostgreSQL

Azure

Collaboration

Stakeholder management

Job description

A prominent IT services company in Mulhouse, France, is seeking an experienced Senior / Lead C# Developer to design and deliver enterprise-grade software solutions for a major banking client. This role combines hands-on development with technical leadership in a collaborative environment. Ideal candidates will have strong experience in C# and the .NET ecosystem, along with a proven track record in managing delivery and stakeholder engagements. This position requires on-site work at the client location and offers an exciting opportunity to contribute to impactful projects.