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Added 08/10/2026

Reference: SM081026_1791461900

System Integration Developer | SSIS | APIs | C#/.NET | SC ClearedWe are looking for an experienced System... Read more

System Integration Developer | SSIS | APIs | C#/.NET | SC Cleared

We 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 and systems to ensure reliable data and service integrationTroubleshoot integration issues and support testing and deployment activitiesWork with technical and business stakeholders throughout the integration lifecycleEssential ExperienceStrong recent hands-on SSIS experienceStrong recent API integration experienceProven experience delivering system integration projectsExperience working with C# and/or .NET technologiesAbility to demonstrate the above experience within recent roles/projectsActive or lapsed SC Clearance is essentialDesirable ExperienceRESTful APIs / Web APIsSOAP / Web ServicesMicrosoft SQL ServerIntegration testing and troubleshootingExperience working within secure or government environmentsClearance

Candidates must hold active or previously held/lapsed SC Clearance to be considered.

Interested?

If you have recent hands-on experience with SSIS, API integrations and C#/.NET and hold active or lapsed SC Clearance, please apply with your latest CV detailing your recent system integration project experience.

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

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£500.00 - £800.00

Per day

Exeter, England, United KingdomContractRemote

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

Added 23/09/2026

Reference: 9875130_1790178824

Integration Design: Collaborate with business stakeholders, IT teams, and external partners to gather integration requirements and define workflows.... Read more

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 OfficeMinistry of Defence (MOD)Ministry of Justice (MOJ)HM TreasuryDepartment 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.

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£600.00 - £650.00

Per day

Exeter, England, United KingdomContract

Software Tester

Added 17/08/2026

Reference: Tester_1786950777

Software Tester (SC Cleared)Drive quality. Accelerate delivery. Own automation. We're looking for a Software Tester who can build... Read more

Software Tester (SC Cleared)

Drive quality. Accelerate delivery. Own automation. We're looking for a Software Tester who can build robust automated test solutions that boost efficiency, reduce manual effort, and ensure high‑quality software releases.

What You'll Do

Build Automation Strategy - Identify what to automate, prioritise test cases, and shape a scalable automation approach.

Develop Test Frameworks - Create and maintain automation frameworks using Selenium, Appium, TestNG, JUnit, or similar tools.

Write & Execute Scripts - Build reliable, maintainable automated tests across platforms, devices, and environments.

Integrate with CI/CD - Embed automated tests into pipelines using Jenkins, GitLab CI, Azure DevOps, etc.

Manage Test Data - Create and maintain test data sets and environments for automation.

Analyse & Report Results - Run automated suites, diagnose failures, and log defects clearly in JIRA.

Collaborate in Agile - Work closely with developers, product teams, and manual testers; contribute to sprint ceremonies.

Share Knowledge - Train team members and maintain documentation for frameworks, scripts, and processes.

What You'll Bring

Experience as an Automated Tester or Test Automation Engineer.

Strong skills in Selenium WebDriver, Appium, TestNG, JUnit, or similar tools.

Solid programming ability in Java, Python, C#, or JavaScript.

Experience with Git, Azure DevOps, or other version control systems.

Hands‑on CI/CD pipeline experience.

Excellent problem‑solving and attention to detail.

Strong communication and teamwork skills.

Agile experience (Scrum/Kanban).

Test automation certifications (ISTQB etc.) are a plus.

Why This Role?

You'll be at the heart of improving software quality and delivery speed. If you're passionate about automation, efficiency, and building reliable test solutions, this role gives you the platform to make a real impact.

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

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£400.00 - £500.00

Per day

Exeter, England, United KingdomContractRemote

Software Tester

Added 02/07/2026

Reference: Tester_1782907522