Date posted
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Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
29 API jobs in Hemel Hempstead + 20 miles
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Senior API Technical Consultant (GraphQL Specialist)
Senior API Technical Consultant (GraphQL Specialist)
Staffworx Limited
Slough (SL1)
market rates, outside IR35, 2 days on site
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
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Senior .Net Integration Developer
Senior .Net Integration Developer
Rise Technical
Maidenhead, Berkshire
£50000.00 - £70000.00 per annum + + Training + Holiday
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
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Senior .Net Integration Developer
Senior .Net Integration Developer
Rise Technical Recruitment Limited
Maidenhead (SL6)
£50000.00 - £70000.00 per annum + + Training + Holiday
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built on modern API standards. * Support customers and partners with integration setup and API usage
PREMIUM
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Expertise on Oracle Simphony, API knowledge, Knowledge of Product Limitations
Expertise on Oracle Simphony, API knowledge, Knowledge of Product Limitations
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API integrations
API integrations
FEATURED
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Applications Support Analyst / Engineer
Applications Support Analyst / Engineer
Kudos Partners
Datchet Common, Slough (SL3), SL3
£75,000 per annum plus 12% bonus - generous benefits package
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
API support and monitoring tools (e.g., SolarWinds, AzureAppInsights)
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Data Engineer
Data Engineer
McGregor Boyall Associates Limited
Turnham Green, West London (W4), W4 1SY
£30000 - £35000 per annum
Develop API integrations to connect multiple business systems
Develop API integrations to connect multiple business systems
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Strong grasp of API integrations, middleware and multi system architectures.
Strong grasp of API integrations, middleware and multi system architectures.
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Get your API on!
Get your API on!
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Interact with API systems to query and retrieve data for analysis. * Knowledge of querying API systems.
Interact with API systems to query and retrieve data for analysis. * Knowledge of querying API systems.
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Get your API on!
Get your API on!
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To work with a Senior Product Manager to continually improve The client's digital proposition, which could include product ownership of the newly introduced 'My The client' platform and commercial B2B API portal. Deliver innovative digital experiences to a global audience to improve conversion, revenue and third-party developers using the commercial B2B API portal. API product experience will be a further advantage. Thorough understanding of API development along with demonstrable experience of launching and maintaining B2B portals.
To work with a Senior Product Manager to continually improve The client's digital proposition, which could include product ownership of the newly introduced 'My The client' platform and commercial B2B API portal. Deliver innovative digital experiences to a global audience to improve conversion, revenue and third-party developers using the commercial B2B API portal. API product experience will be a further advantage. Thorough understanding of API development along with demonstrable experience of launching and maintaining B2B portals.
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Solutions Architect - 6 months £700 per day - This logistics business, based in central London, has undertaken a significant change and transformation programme, the outcome of which is a new multi SAAS platform that will underpins the future state of the architecture. As part of this programme we are looking for a Solution Architect to contribute to shaping the future-state architecture that enables the organisation to meet its strategic business goals. This role ensures that technology solutions directly support desired business outcomes - such as improved efficiency, customer experience, scalability, and innovation-while maintaining strong architectural integrity. The Solution Architect oversees the design of systems and applications across the enterprise and regularly reviews the application portfolio to maximise value, reduce complexity, and ensure agility.
Solutions Architect - 6 months £700 per day - This logistics business, based in central London, has undertaken a significant change and transformation programme, the outcome of which is a new multi SAAS platform that will underpins the future state of the architecture. As part of this programme we are looking for a Solution Architect to contribute to shaping the future-state architecture that enables the organisation to meet its strategic business goals. This role ensures that technology solutions directly support desired business outcomes - such as improved efficiency, customer experience, scalability, and innovation-while maintaining strong architectural integrity. The Solution Architect oversees the design of systems and applications across the enterprise and regularly reviews the application portfolio to maximise value, reduce complexity, and ensure agility.
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Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
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Software Engineer
Software Engineer
Spectrum It Recruitment Limited
Aylesbury (HP17)
£50000 - £55000 per annum + plus benefits
GoLang, JavaScript, Linux, hardware - In office location of Aylesbury, Buckinghamshire. Some flex on hybird working. - Salary circa £50,000 - £55,000 plus benefits - Technology provider of secure identity, access, and authentication solutions. My client build high-performance software and hardware systems that support mission-critical identity operations. The engineering team works across embedded systems, backend services, and security infrastructure to deliver reliable, scalable products. Role Overview - You will be a versatile Software Engineer with strong experience in Go (Golang), JavaScript, Linux environments, and hardware configuration. The ideal candidate is comfortable working across the full stack-from backend services to device-level integration-and enjoys solving complex problems in a fast-paced, product-focused environment. Key Responsibilities
GoLang, JavaScript, Linux, hardware - In office location of Aylesbury, Buckinghamshire. Some flex on hybird working. - Salary circa £50,000 - £55,000 plus benefits - Technology provider of secure identity, access, and authentication solutions. My client build high-performance software and hardware systems that support mission-critical identity operations. The engineering team works across embedded systems, backend services, and security infrastructure to deliver reliable, scalable products. Role Overview - You will be a versatile Software Engineer with strong experience in Go (Golang), JavaScript, Linux environments, and hardware configuration. The ideal candidate is comfortable working across the full stack-from backend services to device-level integration-and enjoys solving complex problems in a fast-paced, product-focused environment. Key Responsibilities
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Company Overview - At GSK, we have bold ambitions for patients, aiming to positively impact the health of 2.5 billion people by the end of the decade. Our R&D focuses on discovering and delivering vaccines and medicines, combining our understanding of the immune system with cutting-edge technology to transform peoples lives. GSK fosters a culture ambitious for patients, accountable for impact, and committed to doing the right thing, making sure that we focus our efforts on accelerating significant assets that meet patients needs and have the highest probability of success. GSK has kicked off 2025 with impressive growth in sales, profits, and earnings. We anticipate five major new FDA product approvals and 15 phase III/pivotal study readouts over the next two years. So far, we have secured two FDA approvals, with three more expected later this year.
Company Overview - At GSK, we have bold ambitions for patients, aiming to positively impact the health of 2.5 billion people by the end of the decade. Our R&D focuses on discovering and delivering vaccines and medicines, combining our understanding of the immune system with cutting-edge technology to transform peoples lives. GSK fosters a culture ambitious for patients, accountable for impact, and committed to doing the right thing, making sure that we focus our efforts on accelerating significant assets that meet patients needs and have the highest probability of success. GSK has kicked off 2025 with impressive growth in sales, profits, and earnings. We anticipate five major new FDA product approvals and 15 phase III/pivotal study readouts over the next two years. So far, we have secured two FDA approvals, with three more expected later this year.
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We are seeking a highly skilled LLM Developer to design, build, and deploy a web-based AI agent that will automate and elevate our core QA coordination tasks. * Design & Implement NLP Pipelines: Parse, understand, and extract key information from unstructured Release Notes and Test Policy documents. * Develop RAG Systems: Fine-tune a Retrieval-Augmented Generation (RAG) system, training models on QA policies for accuracy and context-awareness. * Build AI Agent Architecture: Utilize modern LLM APIs (e.g., OpenAI, Anthropic, Gemini) and frameworks (e.g., LangChain, LlamaIndex) to create a robust system. * Integrate Backend APIs: Enable the AI agent to automatically publish generated test guides to our internal web platform. * Create Web-Based UI: Develop a simple, effective interface for QA teams to interact with, review, and override AI outputs if necessary.
We are seeking a highly skilled LLM Developer to design, build, and deploy a web-based AI agent that will automate and elevate our core QA coordination tasks. * Design & Implement NLP Pipelines: Parse, understand, and extract key information from unstructured Release Notes and Test Policy documents. * Develop RAG Systems: Fine-tune a Retrieval-Augmented Generation (RAG) system, training models on QA policies for accuracy and context-awareness. * Build AI Agent Architecture: Utilize modern LLM APIs (e.g., OpenAI, Anthropic, Gemini) and frameworks (e.g., LangChain, LlamaIndex) to create a robust system. * Integrate Backend APIs: Enable the AI agent to automatically publish generated test guides to our internal web platform. * Create Web-Based UI: Develop a simple, effective interface for QA teams to interact with, review, and override AI outputs if necessary.
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Graduate IT Project Manager
Graduate IT Project Manager
Inspiring Search
Wealdstone, Harrow (HA3), HA3 5EQ
From £28,000 to £32,000 per annum
We are one of the leading plumbing, heating and electrical companies nationally, serving residential and commercial clients throughout South East England with almost three decades in the industry, we have worked to build a large, fully equipped team of over 150 members of staff all focused on providing the best quality service to our customers. We work closely with various known housing associations, local councils as well as catering to the private sector such as schools, hotels, care homes and commercial building. Support the delivery and improvement of the business systems and information security. The Graduate IT Project Manager will coordinate with a third-party IT development partners, assist in implementing system enhancements, manage company IT assets, and help maintain access control and documentation processes across the business.
We are one of the leading plumbing, heating and electrical companies nationally, serving residential and commercial clients throughout South East England with almost three decades in the industry, we have worked to build a large, fully equipped team of over 150 members of staff all focused on providing the best quality service to our customers. We work closely with various known housing associations, local councils as well as catering to the private sector such as schools, hotels, care homes and commercial building. Support the delivery and improvement of the business systems and information security. The Graduate IT Project Manager will coordinate with a third-party IT development partners, assist in implementing system enhancements, manage company IT assets, and help maintain access control and documentation processes across the business.
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Application Developer
Application Developer
Wise Employment – Plymouth
Marshgate Trading Estate, Maidenhead (SL6), SL6
Market related
PowerShell scripting, API development
PowerShell scripting, API development
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FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, Excel, CSV files ??
FTP/SFTP, SSL Certificates, REST API, SOAP, Postman, Excel, CSV files ??
FEATURED
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API Management gateways
API Management gateways
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Data exchange and processing skills (e.g. ETL, ESB, API...)
Data exchange and processing skills (e.g. ETL, ESB, API...)
FEATURED
Design, develop, and deliver custom solutions within Planon's API framework.
Design, develop, and deliver custom solutions within Planon's API framework.
FEATURED
Design, develop, and deliver custom solutions within Planon's API framework.
Design, develop, and deliver custom solutions within Planon's API framework.
FEATURED
Define and manage the external access layer, creating a secure and governed API Gateway that empowers third-party developers to integrate independently. * Establish a consistent API publishing workflow for all internal squads, ensuring quality and governance as we scale our external offerings. You have a deep understanding of developer platforms and API ecosystems, with experience in both internal productivity and external integration. * Sector knowledge: You have technical fluency in areas like CI/CD, observability, API gateways, and infrastructure-as-code. Deliver a world-class external access layer, including a Developer Portal and governed API Gateway, to empower third-party developers to self-serve and integrate seamlessly.
Define and manage the external access layer, creating a secure and governed API Gateway that empowers third-party developers to integrate independently. * Establish a consistent API publishing workflow for all internal squads, ensuring quality and governance as we scale our external offerings. You have a deep understanding of developer platforms and API ecosystems, with experience in both internal productivity and external integration. * Sector knowledge: You have technical fluency in areas like CI/CD, observability, API gateways, and infrastructure-as-code. Deliver a world-class external access layer, including a Developer Portal and governed API Gateway, to empower third-party developers to self-serve and integrate seamlessly.