Senior C#/.NET Developer — Cloud Modernisation (Hybrid)

GCS Recruitment; Greater London; Hybrid; GBP 65,000 - 88,000; Full time

Job summary

GCS Recruitment is seeking an experienced Senior C# Developer for a Tier 1 Investment Bank in Canary Wharf. You will contribute to modernising core desktop applications, moving to web-based and cloud-enabled platforms, and shaping future-state architecture within a large enterprise.

You'll work across the full SDLC, enhancing WPF/WinForms apps, building APIs, and integrating with Azure, while collaborating with stakeholders and architecture teams to deliver robust software solutions.

Qualifications

• Strong commercial experience developing applications using C#/.NET.
• Proven expertise with WPF or WinForms.
• Experience with SQL or Oracle and understanding of software design principles.

Responsibilities

• Develop and maintain enterprise-grade applications using C#
• Enhance and support existing WPF and WinForms applications
• Contribute to the migration of desktop applications towards web-based architectures
• Build and integrate APIs and backend services
• Write efficient SQL queries and stored procedures
• Collaborate with business analysts, architects and end users to understand requirements
• Participate in code reviews and promote development best practices
• Troubleshoot production issues and contribute to continuous improvement initiatives
• Support the adoption of Azure technologies as part of the broader cloud transformation strategy

Skills

C# / .NET

WPF / WinForms

SQL / Oracle

Azure

Software design principles

Job description

GCS Recruitment is seeking an experienced Senior C# Developer for a Tier 1 Investment Bank in Canary Wharf. You will contribute to modernising core desktop applications, moving to web-based and cloud-enabled platforms, and shaping future-state architecture within a large enterprise.

You'll work across the full SDLC, enhancing WPF/WinForms apps, building APIs, and integrating with Azure, while collaborating with stakeholders and architecture teams to deliver robust software solutions.