1 to 25 of 99 Permanent API Integration Jobs in the UK excluding London

AI Backend Engineer - Data & Integration

Hiring Organisation
Digital Iron
Location
Belfast, Northern Ireland, United Kingdom
industrial equipment is maintained. We're looking for an AI Infrastructure Engineer who combines deep technical expertise in distributed systems with strategic thinking about integration architecture. You'll need exceptionally high standards for data accuracy, first-principles problem solving, and an obsession with building systems that scale across diverse … models. As our first dedicated infrastructure engineer, you'll work on problems at the intersection of knowledge graphs, real-time IoT data, and enterprise integration—building infrastructure that thousands of businesses will depend on. What You'll Own Design the framework that supports multiple partnership and customer models: Deep ...

Web Developer

Hiring Organisation
Akkodis
Location
Stevenage, England, United Kingdom
with AEM Sling Models Working within enterprise CMS-driven architectures Core Technical Skills HTML5, CSS3, JavaScript (ES6+) React.js & TypeScript State management (Redux/Zustand) API integration (REST/GraphQL) Version control using Git Front-end testing (Jest, Cypress, etc.) Strong debugging and performance optimisation skills 📩 Interested? Apply ...

Integration Analyst

Hiring Organisation
Hays Specialist Recruitment Limited
Location
Gainsborough, Lincolnshire, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
collaborative team of technical and non-technical professionals, working on projects that underpin ongoing digital transformation. Your focus will be on managing our API footprint and EDI processes, ensuring seamless data exchange across the business. You'll design and document integrations, onboard new EDI customers, and maintain specifications … work closely with the internal development team to implement solutions that deliver real value. What will you be doing? Designing and documenting API integrations for customer-facing applications and partner systems Onboarding new EDI customers, including setup, testing and go-live support Maintaining integration specifications, API documentation ...

Web Developer

Hiring Organisation
Proactive Appointments
Location
Weybridge, Surrey, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
What You’ll Bring: Strong experience with React, React Native, .NET . Proficiency in HTML, CSS, Bootstrap , and frontend development. Solid understanding of SQL , API integration , and Azure . Experience with mobile app development , unit testing , and DevOps tools (GitHub, Azure DevOps). Knowledge of security best practices ...

C#.NET Developer - Azure - Preston

Hiring Organisation
Circle Group
Location
Preston, Lancashire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrations There is some excellent investment in AI technologies, so a chance to work on some cutting-edge software development projects in AI advancement ...

Java Engineer

Hiring Organisation
Profile 29
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
build their business. Role Theyre looking for a Java Engineer to join their implementation team. Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Youll collaborate with solution architects, business analysts …/CD pipelines, and automated testing frameworks Understanding of event-driven design and message brokers (e.g. Kafka, RabbitMQ) Good knowledge of security, authentication, and integration patterns for enterprise systems Experience working in agile teams within digital transformation or automation programmes A willingness to learn BPMN and Camunda tooling Some ...

Web Developer

Hiring Organisation
Noir
Location
Swindon, Wiltshire, England, United Kingdom
Employment Type
Full-Time
Salary
£35,000 - £40,000 per annum
Developer - SaaS - Swindon (Hybrid, 3 Days in Office) (Tech stack: Web Developer, .NET Framework, WebForms, ASP.NET MVC, React, TypeScript, SCSS, Accessibility, API Integration, Performance Optimisation, Testing, Front End Developer) Our client is an established technology business that builds and maintains sophisticated digital platforms used across multiple sectors. They ...

Power Pages Developer

Hiring Organisation
General Dental Council
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Permanent
Salary
£50,000
experience in designing and developing using Microsoft Power Pages, including significant hands-on development. Demonstrated proficiency with Microsoft Dataverse, website authentication, security roles, and API integrations with systems like Dynamics 365. Experience in documenting defects and enhancements and developing appropriate solutions. Solid understanding of the Software Development Lifecycle (SDLC ...

Software Engineer

Hiring Organisation
Expedia Group
Location
Slough, Berkshire, UK
Employment Type
Full-time
across Expedia's white-label and partner platforms. We're building the next generation of video ad infrastructure, AI-powered tooling, and Rapid API integrations to deliver smarter, more engaging ad experiences. This is a frontend-heavy full stack role, ideal for engineers who want to grow across ...

Lead Full Stack .NET Developer - Azure - Preston

Hiring Organisation
Circle Group
Location
Preston, Lancashire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrations Due to investment and a pipeline of brand-new green field work, they need a Lead Full Stack Developer to join the team. ...

Lead .NET Developer - Azure - Preston

Hiring Organisation
Circle Group
Location
Preston, Lancashire, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrations Due to investment and a pipeline of brand-new green field work, they need a Lead Full Stack Developer to join the team. ...

Associate Software Engineer

Hiring Organisation
X-On Health
Location
Woodbridge, Suffolk, East Anglia, United Kingdom
Employment Type
Permanent
Salary
£35,000
technical issues Work with stakeholders to progress and report on projects and tasks Building Voice Agents: Developing and maintaining our Go-based Voice Agent API Development: Contributing to our unified AI API that acts as the gateway between our telephony products and various AI providers Tool Creation: Developing … primarily Go (Golang), so experience with Go or a strong willingness to cross-train from C++/Java/Rust/Python is required API Integration: Experience consuming RESTful APIs and understanding of JSON data structures AI/LLM Exposure: Practical experience interacting with LLM APIs (OpenAI, Anthropic ...

Junior AI Software Engineer

Hiring Organisation
X-On Health
Location
Woodbridge, Suffolk, East Anglia, United Kingdom
Employment Type
Permanent
Salary
£35,000
technical issues Work with stakeholders to progress and report on projects and tasks Building Voice Agents: Developing and maintaining our Go-based Voice Agent API Development: Contributing to our unified AI API that acts as the gateway between our telephony products and various AI providers Tool Creation: Developing … primarily Go (Golang), so experience with Go or a strong willingness to cross-train from C++/Java/Rust/Python is required API Integration: Experience consuming RESTful APIs and understanding of JSON data structures AI/LLM Exposure: Practical experience interacting with LLM APIs (OpenAI, Anthropic ...

Senior Software Developer

Hiring Organisation
Cathcart Technology
Location
Edinburgh, Midlothian, Scotland, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£65,000
product team, driving technical excellence across desktop, web, and mobile applications. Your work will focus on system and software design involving; API integration, database development, and mobile applications (Xamarin/.NET MAUI). This is a role where you can bring ideas, influence technical decisions, and help shape ...

Swift UI Mobile App Lead Developer - Leicestershire

Hiring Organisation
Mapp UK Ltd
Location
Leicester, Leicestershire, East Midlands, United Kingdom
Employment Type
Permanent
Salary
£70,000
ensure application reliability. Agile Methodologies: Proven track record in agile development methodologies, including experience with Scrum. CI/CD: Solid experience in continuous integration and delivery e.g. Azure DevOps. RESTful APIs: Hands on experience with Restful APIs integration. Swift UI Mobile App Lead Developer - Leicestershire ...

Senior Frontend Web Developer (React &

Hiring Organisation
Narwhal Media Group (NMG)
Location
Newport, UK
Employment Type
Full-time
libraries, or tools where they add meaningful value. Ensure maintainable, scalable code across the frontend ecosystem. Performance & Quality: Implement and enforce testing strategies (unit, integration, E2E). Continuously monitor and improve frontend application performance and SEO (especially for Next.js). Troubleshoot and debug complex frontend issues across browsers … Nice to Have Experience with design systems or component libraries (e.g., MUI, Tailwind, Storybook). Familiarity with backend or full-stack development (Node.js, serverless, API integration). Experience with performance profiling, Core Web Vitals, and SEO optimization. Knowledge of testing frameworks like Jest, React Testing Library, Cypress ...

Senior Frontend Web Developer (React & Next.js)

Hiring Organisation
Narwhal Media Group (NMG)
Location
City Of Bristol, England, United Kingdom
libraries, or tools where they add meaningful value. Ensure maintainable, scalable code across the frontend ecosystem. Performance & Quality: Implement and enforce testing strategies (unit, integration, E2E). Continuously monitor and improve frontend application performance and SEO (especially for Next.js). Troubleshoot and debug complex frontend issues across browsers … Nice to Have Experience with design systems or component libraries (e.g., MUI, Tailwind, Storybook). Familiarity with backend or full-stack development (Node.js, serverless, API integration). Experience with performance profiling, Core Web Vitals, and SEO optimization. Knowledge of testing frameworks like Jest, React Testing Library, Cypress ...

Digital Platform Architect power platform

Hiring Organisation
Morgan Philips Specialist Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £70,000 per annum
similar certifications desirable] with recent experience of designing, documenting, and delivering complex digital solutions. Undertake development of customising Dataverse, canvas apps, API integration's with 3rd party systems. Any experience with AI, automation and digital service design principles Work closely with the wider team such ...

Data Engineer

Hiring Organisation
Altech Group Ltd
Location
Greater Liverpool Area, United Kingdom
technical stakeholders. Desirable Experience in procurement, consultancy or public sector environments. Familiarity with BI tools such as Power BI or Tableau. Understanding of API integrations and real time data streaming. Exposure to Lean Six Sigma or broader process improvement methodologies. What you’ll get Salary up to £60k Hybrid ...

C#.NET Developer - Azure - Preston

Hiring Organisation
Circle Group
Location
Preston, Lancashire, United Kingdom
Employment Type
Permanent
Salary
GBP 60,000 Annual
React, etc) is required by a leading company in Preston. You should also have some development experience in the Cloud with Azure & third-party API integrations There is some excellent investment in AI technologies, click apply for full job details ...

Data Engineer Python/SQL -TOP Asset Manager!

Hiring Organisation
Robert Half
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
Data Lake Work with Python, SQL, Spark, AWS, Docker, CI/CD Orchestrate workflows using Airflow, Prefect, or Dagster Support ETL, API integrations, and high-quality data validation Translate business needs into technical solutions with full ownership What You Need STEM degree (Computer Science, Engineering, Maths, etc.) 2+ years ...

Database Engineer

Hiring Organisation
Searchability
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £70,000 per annum
with database backup, replication, recovery, and high-availability strategies Exposure to NoSQL technologies such as MongoDB Experience building or supporting ETL processes and REST API integrations Strong understanding of testing, monitoring, and alerting practices Clear communication skills and the ability to work effectively in a distributed team DESIRABLE EXPERIENCE ...

Mid level C#.net developer

Hiring Organisation
Akkodis
Location
Leicester, Leicestershire, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £50,000 per annum
C#, WPF, ASP.Net, REST, SSIS, TSQL, and SPROCs. Experience in migrating legacy systems to modern platforms like Power Apps and Azure SQL. Familiarity with API integrations and Data Lakehouse/Warehouse ELT processes. Strong documentation skills. This is a hybrid role based in Leicester city centre and my client ...

Full Stack PHP Developer

Hiring Organisation
ITSS Recruitment
Location
Huddersfield, West Yorkshire, United Kingdom
Employment Type
Permanent
Salary
£35000 - £45000/annum Benefits
look and function perfectly across all devices and browsers. Server Management - Manage hosting environments like cPanel, troubleshoot server-related issues, and optimise website performance. API Integration - Work with RESTful APIs and third-party services to enhance website functionality. Security & Performance Optimisation - Implement best practices for security, speed ...

Full-Time .Net MAUI Mobile App Developer (iOS & Android) — Remote (Europe / Asia)

Hiring Organisation
Astera
Location
Slough, Berkshire, UK
Employment Type
Full-time
designs into pixel-accurate UI User onboarding, application flows, and status tracking Admin-driven workflows and internal review tools Secure authentication and backend/API integrations App Store and Google Play deployment Tech expectations .NET MAUI strongly preferred (Equivalent cross-platform frameworks considered if well justified.) Proven experience implementing ...