C# Developer

Reference: RP/C#_1786693576

Tier 1 Investment bank based in Canary Wharf.

Role - C# Developer - Desktop Applications

Duration - 6 months with likely extension

Rate - £416 p/d (inside IR35)

Location - Hybrid / Canary Wharf

Tech Stack

  • C#
  • WPF
  • Winforms
  • Javascript
  • SQL
  • Oracle

Tasks

  • Tasks range from understanding business requirements, designing application structures, business data analysis, programming WPF (Windows Presentation Foundation) applications in Visual C#.NET on both Oracle and SQL Server database, testing with users, implementation through Development, Quality Assurance (QA), Production and Disaster Recovery environments. Supporting users and writing operation documents including User Helps (manuals) will also be required.
  • As well as application development, this role will also include all aspects of system constructions and support for existing programmes which are written as WinForms (C#.NET) applications. Also, applications written in other languages like MS VBA for Excel and Access, MS VB and MS Excel Macros will also be required.

Additional Tasks

  • Defining Database objects required in systems to connect with SQL and Oracle Database Administrators in both London and New York.
  • Providing script for database inquiry languages, i.e., T-SQL (SQL Server) and PL/SQL (Oracle) to perform data analysis based on requirements from business parties.
  • Setting up a system distribution method to Citrix and application servers for both Web and Window applications.
  • Troubleshooting systems in an event of failure and implementing necessary solutions by checking Windows Operating System, Internet Information Server and any other relevant environments where the applications are running. In some case this role will act to liaise with other application support team staff.
  • Following the existing team programming policy to keep a common development style to be shared in team members.
  • Updating versions of MS .Net Framework and MS Visual .NET platform to include any necessary changes of existing systems running in Production.
  • Liaising with the relevant support teams such as other Development sections, Technical Support, Network and Infrastructure and DBA where Business users experience system problems.
  • Assessing the impact of data processing loads on SQL and Oracle database and, when appropriate, finding alternative approaches.
  • Rolling out changes with a coordination of Release manager. It is important to maintain the change history of applications

GCS is acting as an Employment Business in relation to this vacancy.

£400.00 - £416.00
Per day
GBP400 - GBP416 per day + inside IR35
Added 14/08/2026
Reference: RP/C#_1786693576

Other similar jobs

Integration Developer (SSIS Package Integration) - SC Active

Added 05/10/2026

This role requires SC Active or recently lapsed. ROLE PURPOSEAs an Integration Developer, your primary responsibility is to design, develop, and maintain data integration solutions that enable seamless communication and data exchange between disparate systems. You will collaborate with stakeholders to understand integration requirements, design integration workflows, and implement scalable and robust solutions. Your role involves working with integration platforms, tools, and technologies to ensure the reliable and efficient flow of data across the organization.PRINCIPLE ACCOUNTABILITIES:Integration Design: Collaborate with business stakeholders, IT teams, and external partners to gather integration requirements and define integration workflows. Design data mappings, transformations, and message...

Learn more

Integration Developer (SSIS, SQL) (SC Cleared, Public Sector)

Added 05/10/2026

your recent hands-on SSIS experience, especially where you have used SSIS for system-to-system integration, rather than mainly reporting or data warehousing.Be prepared to explain:Which systems you integrated using SSISHow data moved between the systemsWhat transformations/mappings you performedHow frequently the integration ranHow you handled errors and validate Integration Design: Collaborate with business stakeholders, IT teams, and external partners to gather integration requirements and define workflows. Design data mappings, transformations, APIs, and message schemas to facilitate the secure and efficient exchange of data between systems.Integration Platforms and Tools: Utilize integration platforms such as Azure Logic Apps, Azure Data Factory, SSIS, or other...

Learn more

AI Copilot Developer

Added 02/10/2026

AI Copilot Developer - Power Apps - Power platform - Banking - Hybrid Role - AI Copilot DeveloperRate - £490 per day (Inside IR35)Duration - 6 months with very likely extensionLocation - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf officeTech StackCopilotPowerappsPower platformJavascriptRoleDevelopment and support of low code Business applications using Power platform, M365, C#, JavaScript. You will collaborate closely with business analysts, business users and stakeholders to understand requirements, design innovative solutions, and bring them to life through development, testing, and deployment.TasksDesign, develop, test, and deploy AI-powered solutions using Microsoft Copilot Studio, Power Platform,...

Learn more

Senior C# Developer

Added 02/10/2026

Contract Opportunity | Tier 1 Investment Bank | Canary WharfOverviewOur client, a Tier 1 Investment Bank based in Canary Wharf, is seeking an experienced C# Developer to join a strategic application modernisation programme. This role sits within a technology team responsible for evolving critical business applications, supporting a transition from legacy desktop solutions to modern web-based and cloud-enabled platforms.The successful candidate will work across the full software development lifecycle, contributing to the enhancement of existing applications while helping shape the future-state architecture.Key InformationRole: Senior C# Developer Location: Canary Wharf, London (Hybrid Working) Contract Length: 6 Months Initial Contract Rate: £416...

Learn more

Java Developer (Kotlin or Neo4j)

Added 01/10/2026

Experience in Kotlin (or significant Java experience with a willingness to learn Kotlin)Experienced in API development, SQL/databases, HTML/JavascriptExcellent writing skills and attention to detail in codeProactive person who will not wait to be told what to do next or be unblocked by othersExperience working with standard developer collaboration Tools: Github/Bitbucket, Jira, Confluence, etcThe Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls.The candidate would be working on Kotlin and Java-based web applications and APIs. There are 2-3 applications and PoCs we...

Learn more

Senior Application Developer

Added 28/09/2026

Job SummaryWe are seeking an experienced Senior Application Developer / Systems Analyst to design, develop, implement, and support enterprise applications. The ideal candidate will work closely with business stakeholders and technical teams to deliver scalable, high-quality solutions aligned with business goals and architectural standards.Key ResponsibilitiesGather and analyze business and technical requirements.Design, develop, test, deploy, and support application solutions.Participate in all phases of the Software Development Life Cycle (SDLC).Develop high-quality, reusable, and maintainable code.Recommend new development approaches and code reuse opportunities.Contribute to application, component, and data architecture design.Monitor application performance and resolve production issues.Support system integrations, product evaluations, and build-vs-buy assessments.Ensure...

Learn more

Senior Application Developer

Added 28/09/2026

Job SummaryWe are seeking an experienced Senior Application Developer / Systems Analyst to design, develop, implement, and support enterprise applications. The ideal candidate will work closely with business stakeholders and technical teams to deliver scalable, high-quality solutions aligned with business goals and architectural standards.Key ResponsibilitiesGather and analyze business and technical requirements.Design, develop, test, deploy, and support application solutions.Participate in all phases of the Software Development Life Cycle (SDLC).Develop high-quality, reusable, and maintainable code.Recommend new development approaches and code reuse opportunities.Contribute to application, component, and data architecture design.Monitor application performance and resolve production issues.Support system integrations, product evaluations, and build-vs-buy assessments.Ensure...

Learn more

Java Developer (with Neo4J)

Added 28/09/2026

Job titleJava Developer with Neo4jJob TypeContract (6 Months)Client / IndustryBank Required: Languages: Java 11+, HTML5, JavaScriptFront-End Frameworks: AngularAPIs: RESTful API DesignDatabases: Neo4j, PostgreSQLTesting: Junit, Mockito, CucumberBuilding: MavenTooling: GitHub, JIRA, Confluence, GitHub Copilot The Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls. The candidate would be working on re-platforming an application from a vendor platform (PCF) over to an internal bring your own code (BYOC) platform as well as modernising the application and resolving dependency issues. YOUR RESPONSIBILITIESCollaborate with developers, testers...

Learn more

Senior Application Developer

Added 25/09/2026

Job SummaryWe are seeking an experienced Senior Application Developer / Systems Analyst to design, develop, implement, and support enterprise applications. The ideal candidate will work closely with business stakeholders and technical teams to deliver scalable, high-quality solutions aligned with business goals and architectural standards. Key ResponsibilitiesGather and analyze business and technical requirements.Design, develop, test, deploy, and support application solutions.Participate in all phases of the Software Development Life Cycle (SDLC).Develop high-quality, reusable, and maintainable code.Recommend new development approaches and code reuse opportunities.Contribute to application, component, and data architecture design.Monitor application performance and resolve production issues.Support system integrations, product evaluations, and build-vs-buy...

Learn more

Senior Application Developer

Added 25/09/2026

Job SummaryWe are seeking an experienced Senior Application Developer / Systems Analyst to design, develop, implement, and support enterprise applications. The ideal candidate will work closely with business stakeholders and technical teams to deliver scalable, high-quality solutions aligned with business goals and architectural standards.Key ResponsibilitiesGather and analyze business and technical requirements.Design, develop, test, deploy, and support application solutions.Participate in all phases of the Software Development Life Cycle (SDLC).Develop high-quality, reusable, and maintainable code.Recommend new development approaches and code reuse opportunities.Contribute to application, component, and data architecture design.Monitor application performance and resolve production issues.Support system integrations, product evaluations, and build-vs-buy assessments.Ensure...

Learn more

Senior C# Developer

Added 23/09/2026

Contract Opportunity | Tier 1 Investment Bank | Canary WharfOverviewOur client, a Tier 1 Investment Bank based in Canary Wharf, is seeking an experienced C# Developer to join a strategic application modernisation programme. This role sits within a technology team responsible for evolving critical business applications, supporting a transition from legacy desktop solutions to modern web-based and cloud-enabled platforms.The successful candidate will work across the full software development lifecycle, contributing to the enhancement of existing applications while helping shape the future-state architecture.Key InformationRole: Senior C# Developer Location: Canary Wharf, London (Hybrid Working) Contract Length: 6 Months Initial Contract Rate: £416...

Learn more

AI Copilot Developer

Added 23/09/2026

AI Copilot Developer - Power Apps - Power platform - Banking - Hybrid Role - AI Copilot DeveloperRate - £490 per day (Inside IR35)Duration - 6 months with very likely extensionLocation - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf officeTech StackCopilotPowerappsPower platformJavascriptRoleDevelopment and support of low code Business applications using Power platform, M365, C#, JavaScript. You will collaborate closely with business analysts, business users and stakeholders to understand requirements, design innovative solutions, and bring them to life through development, testing, and deployment.TasksDesign, develop, test, and deploy AI-powered solutions using Microsoft Copilot Studio, Power Platform,...

Learn more

Integration Developer C#,.Net (SC Cleared, Public Sector)

Added 23/09/2026

Integration Design: Collaborate with business stakeholders, IT teams, and external partners to gather integration requirements and define workflows. Design data mappings, transformations, APIs, and message schemas to facilitate the secure and efficient exchange of data between systems.Development and Implementation: Design, develop, test, and deploy integration solutions using C#, .NET, or similar programming languages. Build RESTful APIs and backend services to support integration needs. Configure connectors and implement robust error handling and retry mechanisms to ensure reliability and data integrity.Integration Platforms and Tools: Utilize integration platforms such as Azure Logic Apps, Azure Data Factory, SSIS, or other middleware tools to orchestrate...

Learn more

Java Developer

Added 22/09/2026

Required: Languages: Java 11+, HTML5, JavaScriptFront-End Frameworks: AngularAPIs: RESTful API DesignDatabases: Neo4j, PostgreSQLTesting: Junit, Mockito, CucumberBuilding: MavenTooling: GitHub, JIRA, Confluence, GitHub CopilotThe Developer Experience (DevX) Standards and Controls function is building a platform for control owners and development teams to manage/view their compliance with a range of software development controls.The candidate would be working on re-platforming an application from a vendor platform (PCF) over to an internal bring your own code (BYOC) platform as well as modernising the application and resolving dependency issues.YOUR RESPONSIBILITIES Collaborate with developers, testers and the wider organisation to build and run productsDesign, develop & implement...

Learn more

Kotlin Developer

Added 22/09/2026

Kotlin Developer (Contract)📍 Sheffield, UK (Hybrid - 2 Days Onsite per Week) 📄 Contract | Full-TimeAbout the RoleWe are looking for a talented Kotlin Developer to join a dynamic Developer Experience (DevX) Standards & Controls team. You'll play a key role in building and enhancing platforms that enable engineering teams and control owners to manage and monitor compliance with software development standards and controls.This is an excellent opportunity to work on modern, enterprise-scale applications built using Kotlin, Java, APIs, and Microservices, while contributing to innovative proof-of-concept solutions and business-critical platforms.What You'll Be DoingDesign, develop, and maintain Kotlin and Java-based applications...

Learn more
At least 8 characters, 1 uppercase, 1 lowercase and 1 special character or number
Your file must be a doc, docx or pdf. No larger than 5MB.