C# .NET SQL Developer

Reference: RP/C#_1783332830

Tier 1 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 06/07/2026
Reference: RP/C#_1783332830

C# .NET SQL Developer

Greater London, United Kingdom Contract .NET/C# Remote

Other similar jobs

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

Application Support Specialist - C# / SQL

Added 24/08/2026

Application Support Specialist - C# / SQL - Tier 1 Bank - 6 months - Hybrid Role - Application Support SpecialistRate - £416 per dayDuration - 6 months with very likely extensionLocation - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf officeTech StackT/SQLC# .NETOracleRoleApplication support responsibilities for development teams in production environments to cover all aspects such as communication with Data Centre/Help Desk staff, analysing/finding failure to reach a root cause, resolving issues by liaising with development teams, liaising with internal and external supports teams and providing explanations to our Business Clients.TasksTroubleshooting Applications in the...

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

.NET Mobile Developer

Added 15/09/2026

.NET Mobile DeveloperHybrid Ede, Gelderland, Netherlands I'm partnered with a Tripple Microsoft Gold Partner and have supported their hiring over the past few years as they have substantially grown into EMEA markets and owned the market. We are currrently working on a .NET Mobile Developer opportunity with a client who is looking for an experienced engineer to help build and enhance modern mobile applications and backend services. This role would be a great fit for someone with strong experience in .NET mobile application engineering, and a passion for delivering high-quality, scalable solutions in an Agile environment. They are looking for...

Learn more

.Net Integration Developer (SC Cleared)

Added 01/09/2026

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. A strong emphasis will be placed on development experience, especially in building and consuming APIs using C# or similar modern programming languages. Your role involves working with integration platforms, tools, and technologies to ensure the reliable and efficient flow of data across the organization.PRINCIPAL ACCOUNTABILITIESIntegration Design: Collaborate with business stakeholders, IT teams, and external partners...

Learn more

.Net Developer (IAM)

Added 10/08/2026

Role Title: .Net Developer (IAM)Location: Sheffield (Hybrid - 2-3 days per week onsite) Role Category: Inside IR35 Contract Duration: Until end of November with extension OverviewWe're recruiting for an experienced .Net IAM Developer to join the Identity & Access Management team of a leading global financial services organisation.This role offers the opportunity to work on enterprise-scale identity solutions, developing secure integrations and supporting identity lifecycle management across a complex technology estate. ResponsibilitiesDevelop enterprise IAM solutions using .NET Core, ASP.NET and C#.Build and support integrations with SailPoint IdentityNow.Develop custom connectors and REST API integrations.Configure integrations with Active Directory, Microsoft SQL and...

Learn more

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

Added 07/07/2026

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

.Net IAM Developer

Added 18/06/2026

Role Title: .Net IAM DeveloperLocation: Sheffield (Hybrid - 2-3 days per week onsite) Role Category: Inside IR35 Contract Duration: Until 30th November with extension OverviewWe're recruiting for an experienced .Net IAM Developer to join the Identity & Access Management team of a leading global financial services organisation.This role offers the opportunity to work on enterprise-scale identity solutions, developing secure integrations and supporting identity lifecycle management across a complex technology estate. ResponsibilitiesDevelop enterprise IAM solutions using .NET Core, ASP.NET and C#.Build and support integrations with SailPoint IdentityNow.Develop custom connectors and REST API integrations.Configure integrations with Active Directory, Microsoft SQL and Web...

Learn more

Senior .NET Azure Engineer -Policy-as-Code Platform- Contract

Added 19/08/2026

Senior .NET Azure EngineerPolicy-as-Code PlatformContractMy client, a leading technology organisation is seeking a Senior .NET Azure Engineer to join a specialist team building a next-generation Policy-as-Code and software delivery governance platform.This is an opportunity to work on a highly strategic engineering initiative focused on automating compliance, governance and deployment controls across large-scale cloud environments. You'll be building the services that connect software engineering workflows with automated policy decisions, helping ensure that releases are secure, audit-able and compliant by design.The RoleYou'll design and develop cloud-native services that integrate with enterprise development platforms and automated governance systems. Working in an API-first, event-driven...

Learn more

Principal .NET engineer

Added 05/08/2026

We're hiring Back-End Lead / Principal .NET engineers for a greenfield AI platform (Azure, microservices). Dublin hub, ideally hybrid. Contract RoleThis long term contract role is for a seasoned .NET Core backend engineer with over six years of experience. The ideal candidate will design and build scalable, event-driven microservices using Azure services such as App Services, Cosmos DB, Service Bus, and Event Hubs while applying CQRS and NoSQL patterns. Tech Stack: .NET Core, Azure services, microservices, and event-driven architectures, along with hands-on experience in GitHub/GitHub Actions for CI/CD.If you want to join an innovative, market-leading team working at the forefront...

Learn more

DevOps Engineer (.Net)

Added 18/06/2026

Role Title: DevOps Engineer (.NET)Location: Sheffield (Hybrid - 2-3 days per week onsite) Role Category: Inside IR35 Contract Duration: Until 30th November with extension OverviewWe're recruiting for an experienced DevOps Engineer (.NET) to join the Identity & Access Management team of a leading global financial services organisation.This role offers the opportunity to work on enterprise-scale IAM platforms, driving automation, CI/CD, Infrastructure as Code and secure deployment practices across cloud and on-premise environments. You'll work closely with engineering, security and operations teams to improve the reliability, scalability and security of critical identity services. ResponsibilitiesDesign, build and maintain CI/CD pipelines for .NET...

Learn more

Integration Developer (SC Cleared)

Added 08/10/2026

System Integration Developer | SSIS | APIs | C#/.NET | SC ClearedWe are looking for an experienced System Integration Developer / Engineer to join a client project requiring strong, recent hands-on experience delivering system integrations using SSIS and APIs.The successful candidate will have a proven background in system integration projects, with their recent experience clearly demonstrating practical use of SQL Server Integration Services (SSIS) and API integrations, alongside exposure to C# and/or .NET technologies.Key ResponsibilitiesDesign, develop and deliver system integration solutionsBuild and maintain integrations using SSIS (SQL Server Integration Services)Develop and support API-based integrations, including REST/API servicesWork across multiple applications...

Learn more

Integration Developer

Added 07/10/2026

Integration Developer (Active SC Clearance Required)Location: Remote / Enfield UK Duration: 12 Months Initial Contract (Extension Likely) Security Clearance: Active SC Clearance Mandatory Start Date: ASAPThe RoleWe're recruiting for an experienced Integration Developer to join a leading UK organisation delivering critical data and system integration initiatives.This role will focus on designing, developing, and supporting enterprise integration solutions that enable secure and reliable data exchange between business-critical systems. You will work closely with technical teams, business stakeholders, and third-party suppliers to build robust, scalable integrations across the Microsoft Azure ecosystem.Key ResponsibilitiesDesign, develop, test, and support enterprise integration solutions.Build and maintain ETL...

Learn more

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

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
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.