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

Reference: 9875130_1790178824
  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.

£600.00 - £650.00
Per day
GBP600 - GBP650 per day
Added 23/09/2026
Reference: 9875130_1790178824

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

Exeter, England, United Kingdom Contract Digital Transformation

Other similar jobs

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

IT Business Analyst (Public Sector Exp and Active SC Required)

Added 01/07/2026

ROLE PURPOSEBusiness Analysts are responsible for eliciting, analysing, and documenting business requirements for the PMP programme, ensuring solutions address operational needs and deliver measurable improvements. PRINCIPAL ACCOUNTABILITIESEngage with operational and enabling stakeholders to gather, analyse and clarify business requirements.Translate business needs into clear, structured artefacts including process maps, user stories and functional specifications.Ensure requirements are documented accurately, clearly and to agreed PMP standards.Support testing and acceptance activities by validating delivered solutions against approved business requirements.Assist with User Acceptance Testing (UAT), clarifying acceptance criteria and supporting issue resolution.Maintain traceability between requirements, delivered solutions and expected benefits.Support assurance and governance activity by...

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

Technical Business Analyst (SC Cleared)

Added 02/09/2026

ROLE PURPOSEBusiness Analysts are responsible for eliciting, analysing, and documenting business requirements for the PMP programme, ensuring solutions address operational needs and deliver measurable improvements. PRINCIPAL ACCOUNTABILITIESEngage with operational and enabling stakeholders to gather, analyse and clarify business requirements.Translate business needs into clear, structured artefacts including process maps, user stories and functional specifications.Ensure requirements are documented accurately, clearly and to agreed PMP standards.Support testing and acceptance activities by validating delivered solutions against approved business requirements.Assist with User Acceptance Testing (UAT), clarifying acceptance criteria and supporting issue resolution.Maintain traceability between requirements, delivered solutions and expected benefits.Support assurance and governance activity by...

Learn more

Senior NetBackup Solution Architect (SC Cleared)

Added 10/08/2026

Senior NetBackup Solution Architect (SC Cleared)London, UKThe OpportunityWe are seeking an experienced Senior NetBackup Solution Architect to join a specialist Professional Services team delivering complex enterprise data protection and cyber resilience solutions across highly regulated customer environments.This is a customer-facing architecture and consulting role, where you will lead technical engagements from discovery and design through to implementation and knowledge transfer. You will work directly with enterprise customers, acting as a trusted advisor to define backup, recovery, and cyber resilience strategies that align with business and operational objectives.Key ResponsibilitiesLead technical workshops, architecture discussions, and design engagements with enterprise customers.Design and deliver...

Learn more

Technical Program Manager - Technology Integration & Transformation

Added 11/09/2026

Technical Program Manager - Technology Integration & TransformationWe're seeking a senior Technical Program Manager to help drive a critical technology integration initiative within a Connected Living Engineering organization.The team is working on the next phase of Commercial Business integration with a Connected Living Platform, creating an opportunity for a program leader who enjoys working through complex technology, organizational, and business challenges.This is a highly visible role requiring someone who can connect the dots across multiple projects, technical teams, business stakeholders, and senior leadership.ResponsibilitiesLead large-scale technology programs from strategy through executionDevelop program roadmaps, business cases, milestones, and integrated delivery plansCoordinate multiple...

Learn more

Collibra Integration Engineer

Added 14/08/2026

Collibra Integration Engineer Role - Hybrid / Canary Wharf - 6 month Contract - Banking Tier 1 Bank - Regulatory Reporting TeamRole - Collibra Integration EngineerDuration - 6 months with very likely extensionLocation - Hybrid / Canary Wharf - 3 days per week in a Canary Wharf officeRate - £430 per day (inside IR35)TasksAdminister and maintain the Collibra platform from an IT engineering perspective, including configuration, health monitoring, troubleshooting, and performance management across EMEA environments.Configure, schedule, and manage integrations using DIP/CDQ, EDGE, and Lineage Harvester, ensuring consistent ingestion of metadata, schemas, and lineage from multiple data sources.Perform connectivity and prerequisite...

Learn more

Sailpoint IIQ Integration Engineer

Added 13/08/2026

SailPoint IIQ Integration Engineer6-Month Contract | Competitive Rate | DublinI'm currently supporting a leading organisation with an immediate requirement for a hands-on SailPoint IIQ Integration Engineer to join an enterprise Identity & Access Management programme.The focus is firmly on engineering, integration and delivery, so we're looking for someone who has hands-on experience building, configuring and delivering SailPoint IdentityIQ solutions within complex enterprise environments.What you'll be doingDesigning, configuring and delivering SailPoint IdentityIQ (IIQ) solutionsDeveloping and supporting integrations between SailPoint and enterprise applicationsWorking with SailPoint connectors, provisioning and identity lifecycle processesDeveloping/configuring workflows, rules and lifecycle eventsSupporting Joiner, Mover and Leaver processesTroubleshooting and...

Learn more

Lead Integration Engineer

Added 03/08/2026

We are looking for a Lead Integration Engineer to join a specialist Integration Team. This is a hands-on leadership role where you'll guide integration projects and mentor engineers whilst remaining close to the technology.You'll help shape and deliver a modern integration platform across a hybrid environment, supporting API management, messaging, eventing and file-sharing capabilities spanning both Azure and on-premise infrastructure. A key focus of the role is enabling DevOps teams to transition to a strategic integration solution that will support a large proportion of future API integration's.Additional details:Location: UtrechtContract length: 12-months + extensionTech: Open Shift, Azure, Bash, Bicep, APIs, Messaging,...

Learn more

Lead Integration Engineer

Added 30/07/2026

I'm currently looking for a Lead Integration Engineer to join a specialist Integration Team. This is a hands-on leadership role where you'll guide integration projects and mentor engineers whilst remaining close to the technology.You'll help shape and deliver a modern integration platform across a hybrid environment, supporting API management, messaging and file-sharing capabilities spanning both Azure and on-premise infrastructure. A key focus of the role is enabling development teams to transition to a strategic integration solution that will support a large proportion of future API integration's.Additional details:Location: UtrechtContract length: 12-months + extensionsTech: Open Shift, Azure, Bash, Bicep, API, Messaging, Event-Driven...

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

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

Python Developer (DevOps Experience mandatory)

Added 22/09/2026

Overview: Own and evolve our Jenkins Shared Library powering multi-language builds (Java/Maven, Node/NPM, Python, Helm, Terraform, containers). Deliver fast, secure, provenance-rich pipelines (SLSA, SBOM, digests) and strengthen supply‑chain integrity across teams.Core Responsibilities:Design and maintain Groovy pipeline steps (build, test, package, scan, deploy).Extend Python tooling for SLSA provenance, SBOM generation, hash/digest accuracy, and security scan aggregation (SonarQube, Sonatype IQ, SAST/Container).Optimize performance (parallel builds, caching, scope-reduced BOMs, dependency prefetch).Ensure artifact integrity (correct SHA1/SHA256 mapping, reproducible inputs, evidence modeling).Refactor legacy scripts (remove global state, consolidate hashing, standardize templates).Document ci-config.yaml standards and usage patterns.Mentor engineers on secure pipeline development and supply-chain practices.Troubleshoot and prevent...

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.