Senior C# Developer

About The Company GCS is a leading employment solutions provider renowned for connecting talented professionals with top-tier organizations across various industries. With a strong reputation for integrity, expertise, and personalized service, GCS specializes in delivering tailored staffing solutions that meet the dynamic needs of the financial services, technology, and corporate sectors. Our extensive network and industry knowledge enable us to facilitate successful placements in both contract and permanent roles, supporting clients in achieving their strategic objectives. Committed to fostering long-term partnerships, GCS prides itself on maintaining high standards of professionalism and ensuring a seamless recruitment experience for all stakeholders. About The Role Our client, a Tier 1 Investment Bank based in Canary Wharf, is seeking an experienced C# Developer to join a strategic application modernization program. This role is pivotal in supporting the bank’s digital transformation initiatives, focusing on evolving critical business applications from legacy desktop solutions to modern web-based and cloud-enabled platforms. The successful candidate will be part of a dynamic technology team responsible for enhancing existing applications, supporting migration efforts to Azure, and contributing to the development of scalable, maintainable, and high-performance software solutions. This contract opportunity offers an engaging environment where technical expertise and innovative thinking are valued, with the aim of delivering impactful technological advancements aligned with business and regulatory needs. Qualifications The ideal candidate will possess a strong background in software development within enterprise environments, with proven experience in C# and related technologies. Essential qualifications include expertise in WPF or WinForms, SQL or Oracle database development, and familiarity with Azure cloud services. Candidates should demonstrate a solid understanding of software design principles, development best practices, and experience working on complex, large-scale projects. A track record of supporting application modernization initiatives, particularly within financial services or investment banking, will be highly advantageous. Strong communication skills and the ability to collaborate effectively with cross-functional teams are also essential qualities. Responsibilities Develop and maintain enterprise-grade applications using C#/.NET frameworks, ensuring high standards of quality and performance.Enhance and support existing desktop applications built with WPF and WinForms, troubleshooting issues and implementing improvements.Contribute to the migration of legacy desktop applications towards modern web-based architectures, supporting seamless transition and integration.Build and integrate APIs and backend services to facilitate scalable and secure application functionalities.Write efficient SQL queries and stored procedures to support application data requirements.Collaborate with business analysts, architects, and end-users to gather requirements, translate them into technical specifications, and deliver effective solutions.Participate in code reviews, promote development best practices, and ensure adherence to quality standards.Troubleshoot and resolve production issues promptly, supporting continuous improvement initiatives.Support the adoption and integration of Azure cloud technologies as part of the broader digital transformation strategy. Benefits This contract role offers competitive daily rates within a prestigious financial institution, providing an excellent opportunity to work on cutting-edge modernization projects. The position supports hybrid working arrangements, offering flexibility and work-life balance. You will gain valuable experience working within a high-caliber team, contributing to transformative initiatives that shape the future of banking technology. Additionally, this role provides exposure to advanced cloud solutions, enterprise application development, and a collaborative environment committed to innovation and professional growth. GCS is dedicated to supporting your career development and ensuring a rewarding engagement throughout the contract duration. Equal Opportunity GCS is an equal opportunity employer committed to fostering an inclusive environment for all employees and applicants. We celebrate diversity and are dedicated to ensuring fair treatment in all aspects of employment. We do not discriminate based on race, gender, age, religion, sexual orientation, disability, or any other characteristic protected by law. Our goal is to create a workplace where everyone feels valued, respected, and empowered to contribute their best.