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4 Contract API jobs in West Sussex + 20 miles
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Experience of API technologies and writing Restful APIs in JSON
Experience of API technologies and writing Restful APIs in JSON
FEATURED
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NSX-T Engineer / Architect SC Cleared
NSX-T Engineer / Architect SC Cleared
Sanderson Government and Defence
Farnborough (GU14), GU14
£550 - £750 per day
Position: NSX-T Engineer / Architect - Location: Farnborough - Day Rate: Market Rate - SC Clearance Required - Our defence client is seeking a highly skilled VMware NSX-T Engineer/Architect to play a key role in designing and delivering secure, resilient, and scalable network solutions across mission-critical environments. This is an opportunity to work at the forefront of software-defined networking within a complex, high-security landscape. Key Responsibilities * Lead the design, deployment, and administration of VMware NSX-T, including logical switching, routing, distributed firewalls, and micro- * Architect robust Layer 2/3 network solutions, with deep expertise in BGP, OSPF, STP, VLANs, and trunking. * Implement advanced firewalling and security controls, including segmentation strategies, IDS/IPS, and zero-trust methodologies.
Position: NSX-T Engineer / Architect - Location: Farnborough - Day Rate: Market Rate - SC Clearance Required - Our defence client is seeking a highly skilled VMware NSX-T Engineer/Architect to play a key role in designing and delivering secure, resilient, and scalable network solutions across mission-critical environments. This is an opportunity to work at the forefront of software-defined networking within a complex, high-security landscape. Key Responsibilities * Lead the design, deployment, and administration of VMware NSX-T, including logical switching, routing, distributed firewalls, and micro- * Architect robust Layer 2/3 network solutions, with deep expertise in BGP, OSPF, STP, VLANs, and trunking. * Implement advanced firewalling and security controls, including segmentation strategies, IDS/IPS, and zero-trust methodologies.
FEATURED
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Implementation Specialist – E-Invoicing
Implementation Specialist – E-Invoicing
Stackstudio Digital Ltd.
Brighton (BN1)
From £300 to £350 per day
Job Title: Implementation Specialist E-Invoicing - Location: London- 1 day - Job Type: 6 months- Inside IR35 - Role overview - Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients. This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service.
Job Title: Implementation Specialist E-Invoicing - Location: London- 1 day - Job Type: 6 months- Inside IR35 - Role overview - Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients. This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service.
Integration & APIs: REST, event-driven architectures, message brokers, API gateways.
Integration & APIs: REST, event-driven architectures, message brokers, API gateways.
369 exact matches jobs are outside your preferred location
Manage and optimize Akamai security suites including: WAF, L7 Anti DDoS, Bot Manager Premier, API Security, Site Shield, API Acceleration. Akamai certifications (WAF, DDoS, Bot Manager, API Protector, Site Shield) are a strong plus.
Manage and optimize Akamai security suites including: WAF, L7 Anti DDoS, Bot Manager Premier, API Security, Site Shield, API Acceleration. Akamai certifications (WAF, DDoS, Bot Manager, API Protector, Site Shield) are a strong plus.
Solid understanding of cloud-based architectures, especially Azure or AWS, including API
Solid understanding of cloud-based architectures, especially Azure or AWS, including API
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Develop and maintain Python code for data processing, API development, and integration with the Azure Databricks environment.
Develop and maintain Python code for data processing, API development, and integration with the Azure Databricks environment.
FEATURED
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Proficiency in API testing tools (Postman, SOAP UI), SQL for data validation, and test management platforms such as Azure DevOps.
Proficiency in API testing tools (Postman, SOAP UI), SQL for data validation, and test management platforms such as Azure DevOps.
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Implement robust state management and API integration * Collaborate with backend teams on API contracts and integration
Implement robust state management and API integration * Collaborate with backend teams on API contracts and integration
FEATURED
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Senior Test Manager
Senior Test Manager
Infoplus Technologies UK Ltd
City of London (EC3M)
From £450 to £500 per day Depends on Experience
Cloud and API led architecture experience.
Cloud and API led architecture experience.
Strong knowledge of data modeling and API integration.
Strong knowledge of data modeling and API integration.
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API integration
API integration
PREMIUM
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Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
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Full Stack Engineer JavaScript
Full Stack Engineer JavaScript
Staffworx Limited
West London (W10)
market rates, outside IR35, 6 months initial, long term extensions
Design & develop GraphQL API services from schema, supergraph, subgraph design to production integration, ensuring performance, flexibility, and maintainability. * Collaborate in Agile teams, driving API strategy, reviewing pull requests, and improving delivery processes. * Familiarity with testing frameworks (Vitest, Playwright) for both API and end-to-end testing.
Design & develop GraphQL API services from schema, supergraph, subgraph design to production integration, ensuring performance, flexibility, and maintainability. * Collaborate in Agile teams, driving API strategy, reviewing pull requests, and improving delivery processes. * Familiarity with testing frameworks (Vitest, Playwright) for both API and end-to-end testing.
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A market leading client is looking for an Integration Architect who has strong Integration experience with Boomi. As an Integration Architect you will shape, design, and deliver modern integration solutions across a diverse enterprise landscape. This is a pivotal role for someone who thrives on solving complex problems, influencing technology direction, and enabling seamless connectivity across systems, data, and business processes. Responsibilities * Analyse business needs and objectives and provide strategic guidance on integration of IT systems. * Excellent Integration experience using Boomi. * Architect and guide integration patterns across Verint, Appian, and other enterprise platforms. * Communicate and present enterprise architecture vision and recommendations to senior management and stakeholders.
A market leading client is looking for an Integration Architect who has strong Integration experience with Boomi. As an Integration Architect you will shape, design, and deliver modern integration solutions across a diverse enterprise landscape. This is a pivotal role for someone who thrives on solving complex problems, influencing technology direction, and enabling seamless connectivity across systems, data, and business processes. Responsibilities * Analyse business needs and objectives and provide strategic guidance on integration of IT systems. * Excellent Integration experience using Boomi. * Architect and guide integration patterns across Verint, Appian, and other enterprise platforms. * Communicate and present enterprise architecture vision and recommendations to senior management and stakeholders.
The role requires strong cross module and integration experience, including IDoc, SAP Proxy, and API based integrations, in complex SAP landscapes. Manage and support integrations using IDoc, SAP Proxy, and API (REST/SOAP)
The role requires strong cross module and integration experience, including IDoc, SAP Proxy, and API based integrations, in complex SAP landscapes. Manage and support integrations using IDoc, SAP Proxy, and API (REST/SOAP)
Lead SIT/UAT cycles, manage defects, and validate interfaces (IDoc/BAPI/OData/API).
Lead SIT/UAT cycles, manage defects, and validate interfaces (IDoc/BAPI/OData/API).
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Lead React Native Engineer / Engineering manager
Lead React Native Engineer / Engineering manager
Sanderson Recruitment
City of London (EC1), EC1
£600 - £700 per day + Outside IR35
Strong API/integration experience: REST / GraphQL, auth flows, contract design and resilience patterns
Strong API/integration experience: REST / GraphQL, auth flows, contract design and resilience patterns
FEATURED
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API integrations
API integrations
PREMIUM
Role Details - Role / Job Title: Solution Architect - Work Location: London - Role Type: Contracting - Office Requirement: 1 day in office - Role Overview - We are seeking an experienced Solution Architect to lead the design and governance of large-scale, enterprise cloud platforms built on AWS. This role requires deep technical expertise in AWS architecture, Infrastructure as Code (Terraform), CI/CD pipelines, and Python-based automation, combined with strong enterprise architecture, security, and stakeholder leadership skills. The successful candidate will define enterprise cloud strategy, establish architectural standards, and ensure consistent, secure, and scalable solution delivery across multiple business units and delivery teams. Key Responsibilities - Enterprise Architecture & Strategy * Define and own enterprise cloud architecture strategy aligned with business and IT roadmaps
Role Details - Role / Job Title: Solution Architect - Work Location: London - Role Type: Contracting - Office Requirement: 1 day in office - Role Overview - We are seeking an experienced Solution Architect to lead the design and governance of large-scale, enterprise cloud platforms built on AWS. This role requires deep technical expertise in AWS architecture, Infrastructure as Code (Terraform), CI/CD pipelines, and Python-based automation, combined with strong enterprise architecture, security, and stakeholder leadership skills. The successful candidate will define enterprise cloud strategy, establish architectural standards, and ensure consistent, secure, and scalable solution delivery across multiple business units and delivery teams. Key Responsibilities - Enterprise Architecture & Strategy * Define and own enterprise cloud architecture strategy aligned with business and IT roadmaps
Solution Architect - PreSales, Bids, Digital Transformation.
Solution Architect - PreSales, Bids, Digital Transformation.
Sanderson Recruitment
City of London (EC1), EC1
£700 - £800 per day
Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
FEATURED
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Jersey (Relocation Required ) * 12-month contract | Outside IR35 * Public Sector / Healthcare Transformation * Flexible working available - Were recruiting an experienced Solutions Architect for a long-term Outside IR35 contract supporting a high-profile public sector healthcare transformation programme in Jersey. This is a delivery-focused architecture role offering real autonomy, clear scope, and the opportunity to shape end-to-end solutions within a regulated, high-impact environment. Relocation to Jersey is required - What Youll Be Doing * Owning end-to-end solution architecture across applications, integration, data, and infrastructure * Translating enterprise architecture into practical, deliverable solution designs * Working closely with delivery teams across Agile and Waterfall programmes * Producing clear, high-quality architecture and design documentation
Jersey (Relocation Required ) * 12-month contract | Outside IR35 * Public Sector / Healthcare Transformation * Flexible working available - Were recruiting an experienced Solutions Architect for a long-term Outside IR35 contract supporting a high-profile public sector healthcare transformation programme in Jersey. This is a delivery-focused architecture role offering real autonomy, clear scope, and the opportunity to shape end-to-end solutions within a regulated, high-impact environment. Relocation to Jersey is required - What Youll Be Doing * Owning end-to-end solution architecture across applications, integration, data, and infrastructure * Translating enterprise architecture into practical, deliverable solution designs * Working closely with delivery teams across Agile and Waterfall programmes * Producing clear, high-quality architecture and design documentation
PREMIUM
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Senior Java Developer (Contract) Java | Spring Boot | Kafka | Microservices | Kubernetes | AWS - London (Hybrid) | 912 Months | Competitive Day Rate - We are hiring a Senior Java Developer for a long-term contract within a major financial market infrastructure organisation in London. This role is focused on event-driven microservices, Kafka-based architectures, containerised deployments, and high-performance distributed systems. If your experience is primarily CRUD REST APIs without large-scale distributed systems exposure, this role will not be the right fit. Core Requirements (Must Have) * Strong Core Java development (Java 10+) * Extensive Spring Boot experience * Proven Microservices architecture experience * Hands-on Apache Kafka (producers, consumers, topics, partitions) * Experience building event-driven systems * Docker & Kubernetes in production
Senior Java Developer (Contract) Java | Spring Boot | Kafka | Microservices | Kubernetes | AWS - London (Hybrid) | 912 Months | Competitive Day Rate - We are hiring a Senior Java Developer for a long-term contract within a major financial market infrastructure organisation in London. This role is focused on event-driven microservices, Kafka-based architectures, containerised deployments, and high-performance distributed systems. If your experience is primarily CRUD REST APIs without large-scale distributed systems exposure, this role will not be the right fit. Core Requirements (Must Have) * Strong Core Java development (Java 10+) * Extensive Spring Boot experience * Proven Microservices architecture experience * Hands-on Apache Kafka (producers, consumers, topics, partitions) * Experience building event-driven systems * Docker & Kubernetes in production
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Role: Backend Engineer (ATA) Location: United Kingdom (Remote work) Skills: Java, AWS, Spring Boot, REST APIs,MySQL - We are looking for a Backend Engineer to join the Core Portal team and build scalable backend services for an enterprise discovery application. You will design and develop robust APIs, integrate with search and knowledge graph platforms, and ensure high performance, reliability, and security of backend systems. * Develop and maintain backend services using Java, Spring Boot, AWS * Build and optimize REST and GraphQL APIs * Ensure code quality through testing, refactoring, and best practices * Own services end-to-end, including deployment, monitoring, and production support * Handle production incidents, perform root cause analysis, and improve system reliability * Contribute to system design, architecture discussions, and documentation
Role: Backend Engineer (ATA) Location: United Kingdom (Remote work) Skills: Java, AWS, Spring Boot, REST APIs,MySQL - We are looking for a Backend Engineer to join the Core Portal team and build scalable backend services for an enterprise discovery application. You will design and develop robust APIs, integrate with search and knowledge graph platforms, and ensure high performance, reliability, and security of backend systems. * Develop and maintain backend services using Java, Spring Boot, AWS * Build and optimize REST and GraphQL APIs * Ensure code quality through testing, refactoring, and best practices * Own services end-to-end, including deployment, monitoring, and production support * Handle production incidents, perform root cause analysis, and improve system reliability * Contribute to system design, architecture discussions, and documentation
Role: Backend Engineer (ATA) Location: United Kingdom (Remote work) Skills: Java, AWS, Spring Boot, REST APIs,MySQL - We are looking for a Backend Engineer to join the Core Portal team and build scalable backend services for an enterprise discovery application. You will design and develop robust APIs, integrate with search and knowledge graph platforms, and ensure high performance, reliability, and security of backend systems. * Develop and maintain backend services using Java, Spring Boot, AWS * Build and optimize REST and GraphQL APIs * Ensure code quality through testing, refactoring, and best practices * Own services end-to-end, including deployment, monitoring, and production support * Handle production incidents, perform root cause analysis, and improve system reliability * Contribute to system design, architecture discussions, and documentation
Role: Backend Engineer (ATA) Location: United Kingdom (Remote work) Skills: Java, AWS, Spring Boot, REST APIs,MySQL - We are looking for a Backend Engineer to join the Core Portal team and build scalable backend services for an enterprise discovery application. You will design and develop robust APIs, integrate with search and knowledge graph platforms, and ensure high performance, reliability, and security of backend systems. * Develop and maintain backend services using Java, Spring Boot, AWS * Build and optimize REST and GraphQL APIs * Ensure code quality through testing, refactoring, and best practices * Own services end-to-end, including deployment, monitoring, and production support * Handle production incidents, perform root cause analysis, and improve system reliability * Contribute to system design, architecture discussions, and documentation