GCS

Solutions Architect - Tier 1 Bank - Canary Wharf Role - Application Architect Duration - 6 months with very likely extension Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office Rate - 600 per day (Inside IR35) Experience - In depth understanding of Object Orientated programming concepts as well as of the full Software Development Life Cycle. Good understanding of MS .NET Framework environments. Knowledge and experience of Agile methodology Knowledge of Cloud and AI technologies that can be adopted into the workplace Extensive experience working as a software and solutions architect. Experience in designing of high-level concepts for software solutions. Experience in development of Azure cloud-based as well as on-prem solutions. DevOps and SCRUM experience Experience in Cloud migration planning and execution Tasks - Create and improve architectural standards for on premise and azure cloud software products, develop cloud migration procedures and guidelines. Assist in cloud migration projects, assess readiness and dependencies, optimize for the Cloud. Create and review blueprints for software products, provide guidance on improving architecture. Coding mission critical parts and performing code reviews. Assist on integrating AI technologies to improve existing systems. Ensure that applications are in line with compliance and regulatory standards and conduct regular security assessments of these applications. Technical writing (creating related documentation) Assist developers with any architecture related issues and queries. GCS is acting as an Employment Business in relation to this vacancy.

Graphic Design, PowerPoint, Content Specialist Role - Hybrid/Canary Wharf - 6 month Contract - Banking Role - Graphic Design, PowerPoint, Content Specialist Industry - Banking/Finance Duration - 6 months with very likely extension Location - Remote/Canary Wharf - 3 days per week in a Canary Wharf office, London Rate - £416 per day (Inside IR35) Tasks The candidate will be responsible for creating visually stunning PowerPoint presentations, designing documents, and editing visually appealing videos. Additionally, The candidate will be responsible for writing clear and concise technical documents and creating templates for a Word and PowerPoint presentations. As a Graphic Designer, The candidate will use expertise in design software such as Photoshop, Illustrator, and InDesign to create graphics that are both aesthetically pleasing and informative. The candidate will be tasked with creating a variety of visual materials. As a Content Publisher, The candidate will be looking after the location, version, and design for varieties of technical/non-technical documents/videos/graphics which exist or to be published in Development team. Duties Create visually stunning PowerPoint presentations and design documents Edit visually appealing videos Create various visual materials Write clear, concise, engaging, and informative technical documents, including user manuals, reference guides, and release notes. Create templates for Word and PowerPoint presentations Use expertise in design software such as Photoshop, Illustrator, and InDesign to create informative and aesthetic graphics Organise and maintain documentation in a logical and accessible manner, using appropriate tools and systems Ensure documentation complies with industry standards, regulatory requirements, and company branding guidelines Review and edit existing documents Use Lucid chart and Visio to create diagrams, flowcharts, and other visual representations of data Use expertise in design software such as Photoshop, Illustrator, and InDesign to create informative and aesthetic graphics Create diagrams, flowcharts, and other visual aids to enhance understanding of technical concepts GCS is acting as an Employment Business in relation to this vacancy.

Graphic Design, PowerPoint, Content Specialist Role - Hybrid / Canary Wharf - 6 month Contract - Banking Role - Graphic Design, PowerPoint, Content Specialist Industry - Banking / Finance Duration - 6 months with very likely extension Location - Remote / Canary Wharf - 3 days per week in a Canary Wharf office, London Rate - 416 per day (Inside IR35) Tasks The candidate will be responsible for creating visually stunning PowerPoint presentations, designing documents, and editing visually appealing videos. Additionally, The candidate will be responsible for writing clear and concise technical documents and creating templates for a Word and PowerPoint presentations. As a Graphic Designer, The candidate will use expertise in design software such as Photoshop, Illustrator, and InDesign to create graphics that are both aesthetically pleasing and informative. The candidate will be tasked with creating a variety of visual materials. As a Content Publisher, The candidate will be looking after the location, version, and design for varieties of technical/non-technical documents/videos/graphics which exist or to be published in Development team. Duties Create visually stunning PowerPoint presentations and design documents Edit visually appealing videos Create various visual materials Write clear, concise, engaging, and informative technical documents, including user manuals, reference guides, and release notes. Create templates for Word and PowerPoint presentations Use expertise in design software such as Photoshop, Illustrator, and InDesign to create informative and aesthetic graphics Organise and maintain documentation in a logical and accessible manner, using appropriate tools and systems Ensure documentation complies with industry standards, regulatory requirements, and company branding guidelines Review and edit existing documents Use Lucid chart and Visio to create diagrams, flowcharts, and other visual representations of data Use expertise in design software such as Photoshop, Illustrator, and InDesign to create informative and aesthetic graphics Create diagrams, flowcharts, and other visual aids to enhance understanding of technical concepts GCS is acting as an Employment Business in relation to this vacancy.

AI Copilot Developer - Power Apps - Power platform - Banking - Hybrid Role - AI Copilot Developer Rate - 490 per day (Inside IR35) Duration - 6 months with very likely extension Location - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf office Tech Stack Copilot Powerapps Power platform Javascript Role Development 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. Tasks Design, develop, test, and deploy AI-powered solutions using Microsoft Copilot Studio, Power Platform, and Microsoft 365 technologies. Build and maintain intelligent agents, conversational AI experiences, and automated business processes. Integrate AI solutions with enterprise systems, including Dataverse, SharePoint, Power BI, Microsoft Fabric, SQL, and other business applications. Collaborate with business stakeholders to gather requirements, identify AI opportunities, and deliver innovative solutions that improve efficiency and user experience. Apply best practices for security, governance, compliance, and Responsible AI to ensure enterprise-grade solutions. Support solution architecture, documentation, testing, deployment, and ongoing maintenance activities. Contribute to continuous improvement by identifying opportunities to leverage AI, automation, and low-code technologies to enhance business processes and decision-making. Provide technical support, troubleshooting, and knowledge sharing across AI, Copilot, and Power Platform initiatives GCS is acting as an Employment Business in relation to this vacancy.

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 data flows and integrate diverse systems. Experience with tools such as Postman, Swagger, and API gateways is highly desirable. API and Service Integration: Build and maintain APIs (REST and/or SOAP), working with authentication, authorization, and secure data exchange. Integrate internal and third-party APIs to facilitate service-oriented and event-driven architecture across systems. Data Transformation and Mapping: Implement data transformation logic to convert between formats like JSON, XML, and CSV. Design reusable components and mappings to streamline data flow between systems with different schemas or protocols. Testing and Debugging: Perform unit, integration, and end-to-end testing of integration workflows and APIs. Debug issues using tools such as Fiddler, Postman, and application logs. Continuously optimize performance and reliability through code refactoring and system tuning. Documentation and Reporting: Document API contracts, integration configurations, and solution architecture to support maintainability. Provide progress updates, technical summaries, and risk reports to stakeholders throughout the project lifecycle. Collaboration and Communication: Work closely with software developers, data engineers, QA teams, and business analysts to align integration work with broader project goals. Clearly communicate technical designs, project updates, and roadblocks to both technical and non-technical stakeholders. Continuous Learning: Keep up-to-date with integration frameworks, cloud technologies, and development best practices. Actively participate in knowledge-sharing sessions and contribute to the continuous improvement of integration standards and code quality Preffred candiadte should be from HM Revenue & Customs (HMRC) Department for Work and Pensions (DWP) Home Office Ministry of Defence (MOD) Ministry of Justice (MOJ) HM Treasury Department for Education (DfE) Department for Transport (DfT) Department of Health and Social Care (DHSC) Department for Environment, Food & Rural Affairs (DEFRA) Department for Science, Innovation & Technology (DSIT) Foreign, Commonwealth & Development Office (FCDO) GCS is acting as an Employment Business in relation to this vacancy.

Contract Opportunity Tier 1 Investment Bank Canary Wharf Overview Our 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 Information Role: Senior C# Developer Location: Canary Wharf, London (Hybrid Working) Contract Length: 6 Months Initial Contract Rate: 416 per day (Inside IR35) Start Date: ASAP The Programme This role forms part of a wider transformation initiative focused on: Modernising legacy desktop applications Migrating technology platforms from on-premise infrastructure to Azure Supporting the transition from desktop-based solutions to web technologies Improving application performance, maintainability and scalability Delivering new functionality aligned to business and regulatory requirements The successful contractor will work closely with development teams, business stakeholders and architecture functions to deliver high-quality software solutions within a complex enterprise environment. Key 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 Required Skills & Experience Essential 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 Desirable 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 Personal Attributes 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 GCS is acting as an Employment Business in relation to this vacancy.

Role purpose Deliver high-quality testing for identity processing and provisioning across the identity lifecycle (joiner/mover/leaver). You'll validate that identities, accounts, and entitlements are provisioned and removed accurately, securely, and in line with control expectations. Key responsibilities Execute functional, integration, and regression testing for identity processing and provisioning changes. Test end-to-end flows across source systems (e.g., HR), identity platform, directories (AD/LDAP), and target applications. Validate provisioning outcomes: account creation/updates, entitlement assignment/removal, approvals, and de-provisioning. Perform negative and exception-path testing (failed connectors, retries, reconciliation, manual overrides). Validate identity data mapping and transformations (attributes, rules, and role logic such as birthright access). Prepare and maintain test artefacts: test cases, test data, execution evidence, and test summary updates. Log and manage defects with clear steps, expected vs actual results, and supporting evidence (logs/screenshots/API responses). Support UAT and release activities by providing test status, risks, and go/no-go input. Collaborate with engineers, analysts, and platform teams to clarify requirements and improve test coverage. Required skills & experience Proven experience in software testing in complex integration environments. Strong understanding of IAM concepts: identity lifecycle, provisioning/de-provisioning, entitlements, RBAC/ABAC, approvals, recertification. Experience testing integrations across multiple systems (HR feeds, directories, IAM tools, and business applications). Solid SQL skills and ability to validate data in databases/logs; comfortable analysing batch files and API payloads. Familiarity with API testing tools (e.g., Postman) and test management/defect tools (e.g., Jira, ALM). Strong defect writing, stakeholder communication, and evidence-based reporting Desirable skills API testing experience (e.g., Postman) and basic understanding of REST/JSON. Exposure to IAM tools (e.g., SailPoint, Saviynt, Okta, Azure AD) and directories (AD/LDAP). Test automation experience (e.g., Java/Python, Selenium, REST-assured, Cypress) and CI/CD (e.g., Jenkins/GitLab). Understanding of audit/control requirements for access management and segregation of duties. GCS is acting as an Employment Business in relation to this vacancy.

We're looking for a data-driven Performance Marketing Manager to lead full-funnel media campaigns across Meta, TikTok, Amazon, Google and Programmatic channels. You'll own audience strategy, first-party data activation, attribution, measurement, ROAS optimisation, and campaign performance, helping shape how marketing investment drives measurable business outcomes. London (Hybrid) | 5-Month Contract Key Skills ? Performance Marketing/Paid Media ? Audience Segmentation & First-Party Data ? Attribution & Incrementality Testing ? ROAS, CPA, MER & Media Effectiveness ? GA4, Adobe Analytics, GTM ? Pixels, CAPI & Server Side Tracking ? Meta, TikTok, Amazon, DV360 Ideal Background Performance Marketing Manager | Growth Marketing Manager | Media Effectiveness Manager | Digital Acquisition Manager | Martech Manager If you're passionate about data, audience strategy, measurement, and driving commercial growth through digital media, we'd love to hear from you. Apply now with your latest CV GCS is acting as an Employment Business in relation to this vacancy.

Required: Languages: Java 11+, HTML5, JavaScript Front-End Frameworks: Angular APIs: RESTful API Design Databases: Neo4j, PostgreSQL Testing: Junit, Mockito, Cucumber Building: Maven Tooling: 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 RESPONSIBILITIES Collaborate with developers, testers and the wider organisation to build and run products Design, develop & implement back-end features as per backlog/priority with a small element of front-end development. Collaborate with the rest of the engineering team to design and launch new features. Proactively work with customers to resolve their issues and respond to feature requests. Build APIs and microservices Work in an agile CI/CD environment to deliver rapid iterations at a sustained velocity Be an active member of a team, participating in peer reviews and in testing others code through automated test scripting SKILLS & EXPERIENCE WE REQUIRE Strong Java development experience (modern Java 11+). Experience designing and building microservices architectural style applications. Experience with Graph databases (experience with Neo4j is desirable). Experience modernising legacy Java applications. Experience with the design and build of REST APIs Experience building HTML/JavaScript front-ends (experience with Angular is desirable). Strong technical and analytical troubleshooting skills. Experience in BDD and/or TDD approaches and frameworks (unit/integration test automation) Experience resolving issues with dependencies (e.g. conflicts), performing upgrades and remediating dependencies with vulnerabilities. Experience in working with Agile including the use of Jira/Confluence. Be a proactive person who will not wait to be told what to do next or be unblocked by others Good interpersonal skills. Strong English skills, written and spoken. GCS is acting as an Employment Business in relation to this vacancy.

Principal Accountabilities Incorporate feature requests into a product roadmap Review and prioritise backlog Develop user stories and define acceptance criteria Set sprint goals Write acceptance tests Plan releases and upgrades Follow progress of work and address production issues during sprints Analyse preferences and requests of end users Refine our agile methodology based on results and client feedback Keep track of industry trends Complexity, Planning And Time Spans Management of own workload and time. Coordinating delivery dates Tracking and monitoring of Development work Reviewing, collating, maintaining and highlighting changes to agreed feature requests Identifying, assessing and reporting product risks and issues, engaging with internal and external contacts where necessary Maintaining financial controls and systems for recording, monitoring, forecasting and budgeting development expenditure and resources Organising and facilitating release closures, as well as ensuring release notes and user guides are available at release Maintaining and communicating product management standards and best practices Assisting in the maintenance, reviewing, and improving of departmental and product management office policies and procedures Producing weekly and monthly performance/status reports for the IT SLT and Stakeholders Difficulties And Demands Of The Role Balancing the changing demands of the business Ensuring all elements of the product development are aligned to meet tight and demanding deadlines. Understanding and keeping on top of all the work that is going on across the business to ensure all work is aligned and doesn't' conflict. Strong organisation skills and management of time and information gathering skills. Clear understanding of the systems and a clear understanding of what needs to be delivered. Typical Decisions Made By The Jobholder How best to implement a request and what impact it has on delivery. How to prioritise and weigh demands of requests from business based on impact and urgency. When a serious issue will delay the product release significantly or increase costs Where a major change in approach needs to be followed that will impact other teams working Facts And Figures Detail the main variables against which the role will be measured. These variables can include sales targets, costs, profits, turnover, etc. Success will be measured successful by continued product development completed on time and on budget. Principal Measures Quality of project and request completion Delivery of client agreed commitments Uptake of IT developments within the business. Amount of Re-work IT Development that needs to be undertook. GCS is acting as an Employment Business in relation to this vacancy.

One of our leading banking clients is looking for an experienced IAM Developer to join a large-scale Identity & Access Management transformation programme. Key Skills Required: Identity & Access Management (IAM) Auth0, Okta, WorkOS, or similar identity platforms Python, Go, or Node.js REST API & Micro services development GCP (Cloud Run, Cloud Functions, GKE) Pub/Sub / Event-Driven Architecture Terraform & CI/CD OAuth2, OIDC, JWT, SAML Nice to Have: React Kubernetes Azure AD / Entra ID Ping Identity Financial Services experience This is an excellent opportunity to work on a high-profile cloud and identity transformation programme within a global banking environment. If interested, please share your updated CV and contact details. GCS is acting as an Employment Business in relation to this vacancy.

Are you a motivated Salesforce Technical Architect who is passionate about Cloud and application architecture? Do you have expert knowledge of Salesforce products and are you looking to get involved at the onset of a new platform and have the chance to really make an impact? Note: This role is based out in Livingston, Leeds OR London (2days/week in office) What you'll do: Partner with product owners and solutions architecture to deliver tailored solutions across the Salesforce Ecosystem to support and realise business requirements. (Sales, Service, Communications, Experience and Marketing Clouds) Drive adoption of best practices and support a community of Salesforce Technical Designers across a wide range of initiatives to support business growth, adoption and exploitation of the Salesforce platform. Employ robust Engineering principles and practices across the design, development and delivery of changes to the Salesforce platform, working across a number of Communities of Practice to foster a culture of continuous improvement, working to define and implement best practices across the Salesforce ecosystem. Perform technical analysis, design and support implementation of changes to Salesforce platform following best practices, leveraging OOTB capabilities and customisation when necessary. Contribute to improvement of DevOps processes, Ways of Working and tools including scrum, user support, platform security, quality, version control and CI/CD. Work with domain and cross-functional agile teams to support and enhance features in CPQ, EPC, CLM and OM to support Salesforce application offerings in iterative release cycles. Manage and train advise a team of Salesforce developers and architects to build solutions using Visualforce, Lightning, APEX, APIs, and Comms Cloud components - OmniScripts, Data Raptors, Omnistudio Cards, Omnistudio Product Designer, Omnistudio Pricing Designer and Integration Procedures. What you'll bring: Extensive and in-depth experience of the Salesforce Digital Commerce platform and business processes including Comms Cloud (Vlocity, CPQ, EPC, OM, CLM), Sales, Service, Experience and Marketing Clouds, ideally in a Communications environment. Experience in design and development across the Salesforce platform including OmniScripts, Data Raptors, Omnistudio (Cards, Product Designer, Pricing Designer), Digital Commerce (including Cart based APIs), Lightning Web Component Framework, Apex, Triggers, SOQL/SOSL, Flows, Integration Procedures, Orchestration Plans and Event Driven integrations with external systems using SOAP, REST, BULK, Platform events and Streaming APIs. Experience of Salesforce core and Comms Cloud performance considerations and knowledge/techniques to avoid performance degradation. Good knowledge of industry CPQ offerings such as Assetization, Product lifecycle management, Digital Commerce/Cart based APIs and external APIs. Experience in building complex, scalable and high-performance software systems, including object modelling and OO design patterns that have been successfully delivered to customers. Knowledge of TOGAF principals would be advantageous. Experience with Version Control Systems and Continuous Integration/Continuous Delivery CI/CD workflows (GitLab CI/CD, Jenkins) using Vlocity Build tool (CLI) or Vlocity IDX tool and SFDX. Knowledge of using SonarQube or other static code analysis tools and ELK or Splunk for log analysis would also be beneficial for this role. GCS is acting as an Employment Agency in relation to this vacancy.

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/SQL C# .NET Oracle 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.

A leading global entertainment company is looking for a Product Development Manager to support the development of licensed Toys, Games and Consumer Products across EMEA. Working with internal stakeholders and key licensing partners, you will manage product development, approvals, and bring products from concept through to market. Location: London Hybrid (1 day per week onsite) Contract: 13-Month Inside IR 35 Key Requirements: Product Development experience within Toys, Games, Consumer Products, Hardlines or Licensing Strong stakeholder and project management skills Understanding of product manufacturing and approval processes Experience working with licensed brands/IP Toy, games or consumer products experience highly desirable This is an exciting opportunity to work on some of the world's most iconic entertainment franchises within a fast-paced, collaborative environment. Interested? Apply now GCS is acting as an Employment Business in relation to this vacancy.

Role: Procurement Contract Admin Location: Birmingham/London/Bristol Rate: GBP 350 per day (Inisde IR35) Nature: Hybrid - 1 day per week Experience in Contract Admin for procurement activities. Analyse and identify the suppliers who should be in the scope of the renogitation program Once the deal done the procurement person has to update thec contract and upload onto docusign. Procurement background is need. Experience with various CRMs or ERPs like SAP GCS is acting as an Employment Business in relation to this vacancy.