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5 Contract API jobs in Spinney Hill + 20 miles
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C# Engineer (Blazor Experience)
C# Engineer (Blazor Experience)
Hays
MK1, Milton Keynes
£350.0 - £400.0 per day + £350 - 400 per day Outside IR35
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
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Ready to use your technical skills to help drive meaningful change? We're looking for a skilled and motivated Senior Data Officer to support the delivery of high-quality data operations at the Motor Neurone Disease (MND) Association. You'll play a vital role in managing and enhancing our CRM systems, ensuring data integrity, streamlining processes, and enabling colleagues across the organisation to work more effectively. This is an exciting time to join, as we prepare to implement a new CRM system that will transform the way we work. As a Senior Data Officer, you will be part of our Data & Insight team within the Finance. Working closely with colleagues in Digital, ICT and Fundraising, providing technical expertise while developing and improving data flows and reporting processes. This is a hands-on role for someone who enjoys working with data tools, scripting, and .
Ready to use your technical skills to help drive meaningful change? We're looking for a skilled and motivated Senior Data Officer to support the delivery of high-quality data operations at the Motor Neurone Disease (MND) Association. You'll play a vital role in managing and enhancing our CRM systems, ensuring data integrity, streamlining processes, and enabling colleagues across the organisation to work more effectively. This is an exciting time to join, as we prepare to implement a new CRM system that will transform the way we work. As a Senior Data Officer, you will be part of our Data & Insight team within the Finance. Working closely with colleagues in Digital, ICT and Fundraising, providing technical expertise while developing and improving data flows and reporting processes. This is a hands-on role for someone who enjoys working with data tools, scripting, and .
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
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2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
104 exact matches jobs are outside your preferred location
Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
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Integrate and manage APIs using Apigee API Management. * Experience with API gateway configuration.
Integrate and manage APIs using Apigee API Management. * Experience with API gateway configuration.
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Previous work in API integration
Previous work in API integration
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You will design, build, and manage API-based integrations across Google Cloud Platform, ensuring secure, scalable, and high-performing solutions. * Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. * Proven experience in API integration patterns and tools. * Strong knowledge of OAuth2, API Keys, and signed URL authentication methods.
You will design, build, and manage API-based integrations across Google Cloud Platform, ensuring secure, scalable, and high-performing solutions. * Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. * Proven experience in API integration patterns and tools. * Strong knowledge of OAuth2, API Keys, and signed URL authentication methods.
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GCP Integration-Focused Developer
GCP Integration-Focused Developer
Infoplus Technologies UK Ltd
Warwick, Warwickshire
From £450 to £500 per day Daily rates are within Inside IR35
Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. Strong experience with API integration patterns and tools. Familiarity with OAuth2, API Keys, and signed URL authentication methods.
Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. Strong experience with API integration patterns and tools. Familiarity with OAuth2, API Keys, and signed URL authentication methods.
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We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
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Software Developer - Active SC, Python, AWS
Software Developer - Active SC, Python, AWS
Hays
London
£400.0 - £425.0 per day + up to £425 per day (InsideIR35)
Proven experience as a software developer with data integration experience (API)
Proven experience as a software developer with data integration experience (API)
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Integrate and manage APIs using Apigee API Management. * Experience with API gateway configuration.
Integrate and manage APIs using Apigee API Management. * Experience with API gateway configuration.
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Python Backend Developer - AWS
Python Backend Developer - AWS
Infoplus Technologies UK Ltd
London
From £300 to £350 per day Max GBP 350/day Inside IR35
GraphQL, API authentication, performance management, and internationalization
GraphQL, API authentication, performance management, and internationalization
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Proficiency in JavaScript, Glide API, and ServiceNow development tools.
Proficiency in JavaScript, Glide API, and ServiceNow development tools.
D365 Finance Senior Integration Developer (remote)
D365 Finance Senior Integration Developer (remote)
Hays
London
£500.0 - £550.0 per day + c£510 per day (inside IR35)
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
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Lead integration of data from SAP (e.g., S/4HANA, BW/4HANA) and external platforms using cloud and API technologies.
Lead integration of data from SAP (e.g., S/4HANA, BW/4HANA) and external platforms using cloud and API technologies.
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Loan IQ Technical Consultant - inside IR35
Loan IQ Technical Consultant - inside IR35
LA International Computer Consultants Ltd
London
£800 - £850 per day
oKnowledge of event management frameworks and API integrations.
oKnowledge of event management frameworks and API integrations.
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My client is a high-profile consultancy who require an Endur Solution Architect, with experience in Endur and in Energy Trading and Risk Management (ETRM) systems, to work closely with an end customer. * Proven expertise as a Subject Matter Expert (SME) in Energy Trading and Risk Management (ETRM) systems, with deep specialization in Endur. * Ability to deliver strategic guidance and solutions for complex trading and risk management scenarios. * Strong capability to optimize Endur functionalities across front-office, middle-office, and back-office operations. * Demonstrated technical leadership in Endur-related projects, ensuring alignment with business goals and industry standards. * Solid understanding of system integration principles, including APIs, middleware, and data interfaces for seamless enterprise connectivity.
My client is a high-profile consultancy who require an Endur Solution Architect, with experience in Endur and in Energy Trading and Risk Management (ETRM) systems, to work closely with an end customer. * Proven expertise as a Subject Matter Expert (SME) in Energy Trading and Risk Management (ETRM) systems, with deep specialization in Endur. * Ability to deliver strategic guidance and solutions for complex trading and risk management scenarios. * Strong capability to optimize Endur functionalities across front-office, middle-office, and back-office operations. * Demonstrated technical leadership in Endur-related projects, ensuring alignment with business goals and industry standards. * Solid understanding of system integration principles, including APIs, middleware, and data interfaces for seamless enterprise connectivity.
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Solution Architect - Hybrid (Travel to Warwick 1-2 days per month) £700 Outside - 6 months - We are seeking a skilled Solution Architect to join our team. In this role, you will be responsible for creating comprehensive business cases to identify and select the most suitable SaaS applications, either from existing market options or through in-house development. Your expertise will be crucial in gathering and analysing requirements, designing architectural solutions, evaluating proposals through Request for Proposals (RFP), and ensuring that Non-Functional Requirements (NFR) are met. You will address security and IT controls while creating architectural artefacts, leading the technical aspects of SaaS deployment across multiple domains, and integrating Identity Provider (IdP) Single Sign-On (SSO) solutions.
Solution Architect - Hybrid (Travel to Warwick 1-2 days per month) £700 Outside - 6 months - We are seeking a skilled Solution Architect to join our team. In this role, you will be responsible for creating comprehensive business cases to identify and select the most suitable SaaS applications, either from existing market options or through in-house development. Your expertise will be crucial in gathering and analysing requirements, designing architectural solutions, evaluating proposals through Request for Proposals (RFP), and ensuring that Non-Functional Requirements (NFR) are met. You will address security and IT controls while creating architectural artefacts, leading the technical aspects of SaaS deployment across multiple domains, and integrating Identity Provider (IdP) Single Sign-On (SSO) solutions.
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API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
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Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
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Contract: Automated Test Engineer (SFIA 5) Rate: £400/day | Outside IR35 | Duration: 12 months - Security Clearance: NPPV2 / NPPV3 - We are seeking an experienced Automated Test Engineer to design and implement automated testing frameworks for complex systems. You will ensure both functional and non-functional requirements are met, working closely with stakeholders to deliver high-quality solutions in a fully remote, agile environment. * Develop and enhance automated testing across all stages of product, system, and service development. * Collaborate with stakeholders to define requirements, acceptance criteria, and ensure robust test coverage. * Implement automation-first strategies and best practices for repeatable, efficient testing. * Identify and adopt tools, techniques, and processes to strengthen testing frameworks. * Mentor and support less experienced test en
Contract: Automated Test Engineer (SFIA 5) Rate: £400/day | Outside IR35 | Duration: 12 months - Security Clearance: NPPV2 / NPPV3 - We are seeking an experienced Automated Test Engineer to design and implement automated testing frameworks for complex systems. You will ensure both functional and non-functional requirements are met, working closely with stakeholders to deliver high-quality solutions in a fully remote, agile environment. * Develop and enhance automated testing across all stages of product, system, and service development. * Collaborate with stakeholders to define requirements, acceptance criteria, and ensure robust test coverage. * Implement automation-first strategies and best practices for repeatable, efficient testing. * Identify and adopt tools, techniques, and processes to strengthen testing frameworks. * Mentor and support less experienced test en
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PowerBI Specialist (Contract) | £350-£450 p/day (Outside IR35) | 3 Months (strong possibility of extension) | ASAP - We're hiring on behalf of a fast-growing SaaS company that's looking for an experienced Power BI Specialist to take ownership of their reporting environment. This is a fully remote contract role, starting immediately. The client has a strong BI foundation in place, but they're now looking for someone who can streamline reporting, reduce maintenance, and optimise their use of Power BI at scale. Right now, customer-specific reports are managed individually (e.g. 45+ reports needing updates when a change is made). They want to consolidate, automate, and improve efficiency across their reporting suite. This is not a 'start from scratch' build - instead, you'll be reviewing what's already in place, identifying improvements, and implementing changes to drive
PowerBI Specialist (Contract) | £350-£450 p/day (Outside IR35) | 3 Months (strong possibility of extension) | ASAP - We're hiring on behalf of a fast-growing SaaS company that's looking for an experienced Power BI Specialist to take ownership of their reporting environment. This is a fully remote contract role, starting immediately. The client has a strong BI foundation in place, but they're now looking for someone who can streamline reporting, reduce maintenance, and optimise their use of Power BI at scale. Right now, customer-specific reports are managed individually (e.g. 45+ reports needing updates when a change is made). They want to consolidate, automate, and improve efficiency across their reporting suite. This is not a 'start from scratch' build - instead, you'll be reviewing what's already in place, identifying improvements, and implementing changes to drive
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Hays Technology are recruiting for a CRM Specialist for one of our clients. This role will initially be a 3-month contract with extension and will work to the rate of up to £500p/d inside IR35. What will you be doing? * Manage the delivery of the CRM services on our platform (Dynamics 365). * Migrate legacy systems and data into the CRM platform. * Work with the business to transform operations into an optimised CRM platform. * Develop a 'single view of the customer' ensuring data from corporate systems is visible to CRM users using integrations, APIs and other technology. * Define and manage security within the CRM. * Recommend improvements to existing processes and products and working with business teams to achieve their outcomes. * Identify and manage risks, issues, dependencies and opportunities for CRM services.
Hays Technology are recruiting for a CRM Specialist for one of our clients. This role will initially be a 3-month contract with extension and will work to the rate of up to £500p/d inside IR35. What will you be doing? * Manage the delivery of the CRM services on our platform (Dynamics 365). * Migrate legacy systems and data into the CRM platform. * Work with the business to transform operations into an optimised CRM platform. * Develop a 'single view of the customer' ensuring data from corporate systems is visible to CRM users using integrations, APIs and other technology. * Define and manage security within the CRM. * Recommend improvements to existing processes and products and working with business teams to achieve their outcomes. * Identify and manage risks, issues, dependencies and opportunities for CRM services.
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