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169 Permanent API jobs in Hertfordshire + 20 miles
635 exact matches jobs are outside your preferred location
At the time of inception, cloud-based systems and API fluency were new.
At the time of inception, cloud-based systems and API fluency were new.
Our software platforms are powered by our REST APIs and everything is developed with an API-first approach.
Our software platforms are powered by our REST APIs and everything is developed with an API-first approach.
NEW
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You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
FEATURED
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Familiarity with HTTP methods and API interaction design
Familiarity with HTTP methods and API interaction design
NEW
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Secure API integration: rate limiting, authentication, and governance via Azure API Management.
Secure API integration: rate limiting, authentication, and governance via Azure API Management.
PREMIUM
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RESTful API design and can build performant endpoints.
RESTful API design and can build performant endpoints.
Detect security weaknesses across API's, Applications and Infrastructure
Detect security weaknesses across API's, Applications and Infrastructure
Strong commercial experience with Node.js (Back End services and API development). * Knowledge of RESTful API design and integration.
Strong commercial experience with Node.js (Back End services and API development). * Knowledge of RESTful API design and integration.
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Deep understanding of API technologies (REST, GraphQL, XML-RPC)
Deep understanding of API technologies (REST, GraphQL, XML-RPC)
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Senior Front-End Developer - 1 Year Contract - Remote
Senior Front-End Developer - 1 Year Contract - Remote
Stealth IT Consulting Limited
UK
From £450 to £500 per day
Understanding of API integrations and cross-functional workflow
Understanding of API integrations and cross-functional workflow
Senior Full Stack Developer (SC Cleared) - 12 Month Contract - Remote
Senior Full Stack Developer (SC Cleared) - 12 Month Contract - Remote
Stealth IT Consulting Limited
UK
From £450 to £500 per day
Strong understanding of API development and microservices
Strong understanding of API development and microservices
)
• Strong backend engineering background delivering high-scale systems with AI components (Python/Java, RAG frameworks, vector databases, API engineering).
• Strong backend engineering background delivering high-scale systems with AI components (Python/Java, RAG frameworks, vector databases, API engineering).
)
We are looking for a highly skilled Lead Business Analyst / Product Owner to lead the design, development, and delivery of API solutions that enable seamless integration across our digital ecosystem. This hybrid role combines strategic product ownership with hands-on business analysis to ensure our API platform meets business needs, enhances interoperability, and supports scalable growth. * Define and own the API product backlog, aligning with business objectives and technology strategy. * Act as the voice of the customer for API consumers, ensuring usability and developer experience. * Gather, analyze, and document functional and non-functional requirements for API development. * Collaborate with architects and engineering teams to design API specifications, JSON, XM
We are looking for a highly skilled Lead Business Analyst / Product Owner to lead the design, development, and delivery of API solutions that enable seamless integration across our digital ecosystem. This hybrid role combines strategic product ownership with hands-on business analysis to ensure our API platform meets business needs, enhances interoperability, and supports scalable growth. * Define and own the API product backlog, aligning with business objectives and technology strategy. * Act as the voice of the customer for API consumers, ensuring usability and developer experience. * Gather, analyze, and document functional and non-functional requirements for API development. * Collaborate with architects and engineering teams to design API specifications, JSON, XM
PREMIUM
Strong experience of working with and developing API endpoints.
Strong experience of working with and developing API endpoints.
)
SPFx, TypeScript/JavaScript, Graph API, PnP PowerShell experience
SPFx, TypeScript/JavaScript, Graph API, PnP PowerShell experience
)
Do you enjoy creating technical documents (Manuals, Announcements, Bulletins, and API & SDK References Documents)?
Do you enjoy creating technical documents (Manuals, Announcements, Bulletins, and API & SDK References Documents)?
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Develop the backend API integrations necessary for the AI agent to automatically publish its generated test guides to our internal web platform.
Develop the backend API integrations necessary for the AI agent to automatically publish its generated test guides to our internal web platform.
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Familiarity with integration tools and methods (e.g., API-based integrations, middleware solutions and automation platforms).
Familiarity with integration tools and methods (e.g., API-based integrations, middleware solutions and automation platforms).
)
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Stay current with emerging technologies, frameworks, and security practices relevant to modern web and API development.
Experience in Python, NodeJS and proficient in React, with strong understanding of integration patterns and secure API design.
Experience in Python, NodeJS and proficient in React, with strong understanding of integration patterns and secure API design.
)
Oracle Fusion Cloud Enterprise Performance Management (EPM) Implementation Support Engineer
Oracle Fusion Cloud Enterprise Performance Management (EPM) Implementation Support Engineer
Oracle Corporation (UK) Ltd
South East
Competitive
Client Support and Communication Integration and API Skills Oracle Cloud EPM Expertise Oracle EPM Cloud Application Support Oracle Updates and Patching Performance Optimization Problem-Solving and Critical Thinking SAAS (Software-As-A-Service)
Client Support and Communication Integration and API Skills Oracle Cloud EPM Expertise Oracle EPM Cloud Application Support Oracle Updates and Patching Performance Optimization Problem-Solving and Critical Thinking SAAS (Software-As-A-Service)
Oracle Fusion Cloud PPM (Projects) Implementation Support Engineer
Oracle Fusion Cloud PPM (Projects) Implementation Support Engineer
Oracle Corporation (UK) Ltd
South East
Competitive
Client Support and Communication Integration and API Skills Oracle Cloud PPM expertise Oracle PPM Cloud Application Support Oracle Updates and Patching Performance Optimization: Problem-Solving and Critical Thinking SAAS (Software-As-A-Service)
Client Support and Communication Integration and API Skills Oracle Cloud PPM expertise Oracle PPM Cloud Application Support Oracle Updates and Patching Performance Optimization: Problem-Solving and Critical Thinking SAAS (Software-As-A-Service)