Senior C# Developer

Salary: £? - ? per year

Requirements:

• Strong commercial experience developing applications using C#/.NET
• Proven expertise with WPF or WinForms
• Strong SQL or Oracle development skills
• Understanding of software design principles and development best practices
• Experience working within complex enterprise environments
• Experience working with Azure
• Experience with JavaScript
• Exposure to React
• Experience contributing to application modernisation programmes
• Knowledge of Azure cloud technologies
• Experience within Financial Services, Investment Banking or Capital Markets environments
• Strong analytical and problem-solving skills
• Excellent communication and stakeholder management abilities
• Ability to work independently in a fast-paced environment
• Collaborative mindset and willingness to mentor junior developers
• Comfortable balancing support of legacy systems alongside modernisation initiatives

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

Technologies:

• Azure
• Backend
• C#
• Cloud
• Support
• JavaScript
• Oracle
• React
• SQL
• WPF
• Web
• ASP.NET
• DevOps

More:

We are supporting a Tier 1 Investment Bank based in Canary Wharf with a strategic application modernisation programme. This contract opportunity is for a Senior C# Developer working in a hybrid setup on a 6-month initial contract, paying £416 per day inside IR35 with an ASAP start. You will join a technology team evolving critical business applications, helping transition legacy desktop solutions to modern web-based and cloud-enabled platforms while working closely with development teams, business stakeholders and architecture functions in a complex enterprise environment.

last updated 40 week of 2026