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Application Support Specialist - C# / SQL - Tier 1 Bank - 6 months - Hybrid

Role - Application Support Specialist

Rate - £416 per day

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Tech Stack

T/SQLC# .NETOracle

Role

Application 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.

Tasks

Troubleshooting Applications in the event of failure and implementing solutions (Code fix, SQL scripting etc), including checking Windows Servers, Databases (SQL Server or Oracle) and any other relevant environments where the Application is running. In some cases, this will involve liaising with other application support team staff across London and New York.Liaising with the relevant support teams (such as Technical Support, Network, Infrastructure, DBA) when users experience Application issues.Communicating with primary support Helpdesk staff in London and New York to give the team necessary advice and suggestions.Working with the team members and the wider development team to establish best practices to support Applications.Working with the wider Development team and other support teams to analyse and establish appropriate Application configuration to meet Business requirements.Contributing and regularly joining technical and design workshops within the team to suggest ideas to achieve stable Application operations.Critically and actively contributing to define Application support standards to ensure their applications are fully capable of running safely in production.Participating in exercises to both plan and estimate work volumes for Application supports.Working with the application release team in the rollout of applications in production that minimize Application failures after release.Adding consideration of performance, scalability and security matters across design and implementation phases.Follow established incident and problem management processes, ensuring accurate ticket updates and clear communication with stakeholders and with any relevant people.Participating in definitions and configuration of Application environments in Disaster Recovery sites.Supporting the continuous improvement and updating Application support methodology for all members in support team, as well as the wider Application support departments.Out of office hours support required as part of production support team

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

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.NET Mobile Developer

Hybrid

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 someone who would have experience with -

.NET / .NET Core / .NET 6+.NET Core and RESTful API development.NET MAUI, Xamarin, or other cross-platform mobile frameworksAndroid and/or iOS application developmentGit, code reviews, branching strategies, and pull requestsSOLID principles, Clean Code, and software architecture best practicesAgile/Scrum delivery methodologiesPerformance optimization, mobile UX, and offline/online application scenariosTaking ownership of features from design through delivery and support

Are you interested? Apply or get in touch with me directly

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

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Application Support Specialist - C# / SQL - Tier 1 Bank - 6 months - Hybrid

Role - Application Support Specialist

Rate - £416 per day

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Tech Stack

T/SQLC# .NETOracle

Role

Application 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.

Tasks

Troubleshooting Applications in the event of failure and implementing solutions (Code fix, SQL scripting etc), including checking Windows Servers, Databases (SQL Server or Oracle) and any other relevant environments where the Application is running. In some cases, this will involve liaising with other application support team staff across London and New York.Liaising with the relevant support teams (such as Technical Support, Network, Infrastructure, DBA) when users experience Application issues.Communicating with primary support Helpdesk staff in London and New York to give the team necessary advice and suggestions.Working with the team members and the wider development team to establish best practices to support Applications.Working with the wider Development team and other support teams to analyse and establish appropriate Application configuration to meet Business requirements.Contributing and regularly joining technical and design workshops within the team to suggest ideas to achieve stable Application operations.Critically and actively contributing to define Application support standards to ensure their applications are fully capable of running safely in production.Participating in exercises to both plan and estimate work volumes for Application supports.Working with the application release team in the rollout of applications in production that minimize Application failures after release.Adding consideration of performance, scalability and security matters across design and implementation phases.Follow established incident and problem management processes, ensuring accurate ticket updates and clear communication with stakeholders and with any relevant people.Participating in definitions and configuration of Application environments in Disaster Recovery sites.Supporting the continuous improvement and updating Application support methodology for all members in support team, as well as the wider Application support departments.Out of office hours support required as part of production support team

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

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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

Project - Modernisation, Desktop to web, on prem to Azure.

Tech Stack

C#WPFWinformsJavascriptSQLOracle

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.

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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#WPFWinformsJavascriptSQLOracle

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.

Read less

Application Support Specialist - C# / SQL - Tier 1 Bank - 6 months - Hybrid

Role - Application Support Specialist

Rate - £416 per day

Duration - 6 months with very likely extension

Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office

Tech Stack

T/SQLC# .NETOracle

Role

Application 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.

Tasks

Troubleshooting Applications in the event of failure and implementing solutions (Code fix, SQL scripting etc), including checking Windows Servers, Databases (SQL Server or Oracle) and any other relevant environments where the Application is running. In some cases, this will involve liaising with other application support team staff across London and New York.Liaising with the relevant support teams (such as Technical Support, Network, Infrastructure, DBA) when users experience Application issues.Communicating with primary support Helpdesk staff in London and New York to give the team necessary advice and suggestions.Working with the team members and the wider development team to establish best practices to support Applications.Working with the wider Development team and other support teams to analyse and establish appropriate Application configuration to meet Business requirements.Contributing and regularly joining technical and design workshops within the team to suggest ideas to achieve stable Application operations.Critically and actively contributing to define Application support standards to ensure their applications are fully capable of running safely in production.Participating in exercises to both plan and estimate work volumes for Application supports.Working with the application release team in the rollout of applications in production that minimize Application failures after release.Adding consideration of performance, scalability and security matters across design and implementation phases.Follow established incident and problem management processes, ensuring accurate ticket updates and clear communication with stakeholders and with any relevant people.Participating in definitions and configuration of Application environments in Disaster Recovery sites.Supporting the continuous improvement and updating Application support methodology for all members in support team, as well as the wider Application support departments.Out of office hours support required as part of production support team

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

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Senior .NET Azure EngineerPolicy-as-Code Platform

Contract

My 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 Role

You'll design and develop cloud-native services that integrate with enterprise development platforms and automated governance systems. Working in an API-first, event-driven environment, you'll build scalable solutions that capture delivery evidence, evaluate policy requirements and provide real-time deployment decisions.

This role would suit someone who enjoys solving complex integration challenges, building robust backend services and working on modern cloud architecture.

Key ResponsibilitiesDesign, develop and support REST APIs, webhook-driven services and platform integrations.Build services that collect, process and evaluate delivery and compliance evidence.Develop automated policy evaluation capabilities that support critical release and deployment workflows.Create scalable event-driven and serverless solutions within Azure.Own API contracts, authentication mechanisms, resilience patterns, retries and error handling.Build clean, maintainable and well-tested software using modern engineering practices.Embed security, auditability and operational resilience into platform design from day one.Collaborate with engineering and platform teams to improve software delivery processes.Essential Skills & ExperienceStrong commercial experience developing with C# and .NET.Experience building cloud-native solutions in Microsoft Azure.Strong API and integration engineering experience.Experience with Azure Functions, distributed systems and event-driven architectures.Solid understanding of the modern Software Development Lifecycle (SDLC).Strong appreciation for engineering best practice including TDD, CI/CD and code reviews.Ability to build high-quality, maintainable and production-ready services.Experience with Python.Knowledge of governance automation, compliance tooling or policy-based controls.Experience within regulated, security-conscious or enterprise-scale environments.Exposure to compliance frameworks, risk management or software governance initiatives.Please send across an updated CV if this position is of interest

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

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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#WPFWinformsJavascriptSQLOracle

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.

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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

Overview

We'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.

Responsibilities

Develop 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 Services.Support identity lifecycle processes including Joiner, Mover and Leaver.Implement and support Role-Based Access Control (RBAC).Investigate and resolve provisioning and access-related issues.Work closely with business stakeholders, infrastructure teams and third-party suppliers.Produce technical documentation and knowledge transfer materials.Support CI/CD automation using Jenkins, GitHub and Ansible.Contribute to cloud-based IAM solutions within Azure and AWS environments.

Required Skills

5+ years' experience in enterprise software development.Strong experience with .NET Core, ASP.NET and C#.Microsoft SQL Server.REST API development and enterprise integrations.Experience integrating with Active Directory.Experience with SailPoint IdentityNow or another enterprise IAM platform.Knowledge of Identity Lifecycle Management, Access Provisioning and RBAC.Experience using Jenkins, GitHub and Ansible.Azure and/or AWS exposure.Excellent troubleshooting and communication skills.

Desirable Skills

SailPoint IdentityNow custom connector development.CyberArk, HashiCorp or Centrify.Angular.Docker and Kubernetes.QA and automated testing.JIRA and Confluence.

This is an excellent opportunity to join a high-performing engineering team delivering secure, enterprise-scale Identity & Access Management solutions using modern .NET technologies, cloud platforms and automation practices.

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

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We're hiring Back-End Lead / Principal .NET engineers for a greenfield AI platform (Azure, microservices). Dublin hub, ideally hybrid.

Contract Role

This 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 of AI and enterprise software, Apply Today!

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

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

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