1 to 25 of 148 API Development Jobs in the UK

Senior Fullstack Developer 50-55k + benefits React, ReactJS, Rest API Development, Node, C#, TypeScript Birmingham - Hybrid Working (1 day/week in-office) Salary: Competitive, dependent on experience, with top-notch employee benefits Join a leading organisation based in Birmingham, West Midlands, offering a fantastic opportunity for a Senior Fullstack Developer with solid experience in RESTful … API development . As a Senior Developer, you will be instrumental in constructing high quality features into their software suite featuring advanced UI functionalities. We seek Fullstack Developers who consider themselves experts in crafting high-quality features for bespoke, world-leading technology organisations. Key Skills for this Fullstack Developer role include: Experience in RESTful API development … Strong expertise in HTML 5, CSS UI Design capabilities Familiarity with AGILE, CI/CD, and DevOps working environments The ideal candidate will possess 5 years plus of commercial development experience in web development, demonstrating a proven ability to deliver highly functional and visually stunning applications and websites. This role offers an excellent career path within a forward More ❯

solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Python Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … co-founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearlyMarkets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we’re building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You’ll Be Doing: You’ll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you’ll work cross-functionally to turn strategy into More ❯

driven solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Python Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Python Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Python Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Lead Customer Integration Team Join a fast-growing HR software company as a Technical Lead for their Integration team with Client Facing experience, leading/mentoring technical teams and API development & integrations experience (C#, .NET, SQL Server). Their cutting-edge HRIS platform streamlines everything from recruitment, onboarding to payroll and performance management. With 25% growth last year … and mentoring/leading junior team members. In this Customer-Facing role you will help customers understand and scope their requirements, coach and support software engineers through the design, development and testing of robust and maintainable solutions and oversee the technical strategy for integrations. Location: Remote-first but UK-based for essential company events. Travel to London or Glasgow … and environments Create and maintain AWS Cloud infrastructure with Infrastructure as Code principles Contribute to shaping the technical strategy and improving engineering practices Experience Required 4+ years experience in API development and integrations (REST, SOAP, GraphQL) Development experience in .NET (C#) and cloud platforms 2+ years experience leading and/or mentoring technical teams 2+ years experience More ❯

edge AI and data-driven applications. Be part of an innovative and collaborative new team. Gain continuous learning and career growth opportunities. Competitive compensation and benefits package. AI & Software Development Design, develop, and maintain AI-powered applications using .NET, C#, Python, and Azure cloud technologies. Build scalable, maintainable, and high-performance AI solutions for enterprise integration. AI Solution Integration … Integrate AI services and frameworks to enhance applications with automation, analytics, and advanced decision-making. Develop smart applications using Azure Open AI, Cognitive Services, and AI-driven APIs. API Development & Cloud Solutions Develop secure, efficient, and scalable RESTful APIs for AI and enterprise applications. Deploy and manage AI/data solutions using Azure Open AI, Azure Kubernetes Service … the following skills and experience: Strong communication and problem-solving skills. Proficiency in C#, .NET, or Python for AI-driven solutions and automation. Experience in AI solution integration and API development (REST, GraphQL). Hands-on experience with Azure cloud services, including Azure OpenAI, AKS, and Azure Container Apps. Strong knowledge of SQL and NoSQL databases (Azure Cosmos More ❯

edge AI and data-driven applications. Be part of an innovative and collaborative new team. Gain continuous learning and career growth opportunities. Competitive compensation and benefits package. AI & Software Development Design, develop, and maintain AI-powered applications using .NET, C#, Python, and Azure cloud technologies. Build scalable, maintainable, and high-performance AI solutions for enterprise integration. AI Solution Integration … Integrate AI services and frameworks to enhance applications with automation, analytics, and advanced decision-making. Develop smart applications using Azure Open AI, Cognitive Services, and AI-driven APIs. API Development & Cloud Solutions Develop secure, efficient, and scalable RESTful APIs for AI and enterprise applications. Deploy and manage AI/data solutions using Azure Open AI, Azure Kubernetes Service … the following skills and experience: Strong communication and problem-solving skills. Proficiency in C#, .NET, or Python for AI-driven solutions and automation. Experience in AI solution integration and API development (REST, GraphQL). Hands-on experience with Azure cloud services, including Azure OpenAI, AKS, and Azure Container Apps. Strong knowledge of SQL and NoSQL databases (Azure Cosmos More ❯

edge AI and data-driven applications. Be part of an innovative and collaborative new team. Gain continuous learning and career growth opportunities. Competitive compensation and benefits package. AI & Software Development Design, develop, and maintain AI-powered applications using .NET, C#, Python, and Azure cloud technologies. Build scalable, maintainable, and high-performance AI solutions for enterprise integration. AI Solution Integration … Integrate AI services and frameworks to enhance applications with automation, analytics, and advanced decision-making. Develop smart applications using Azure Open AI, Cognitive Services, and AI-driven APIs. API Development & Cloud Solutions Develop secure, efficient, and scalable RESTful APIs for AI and enterprise applications. Deploy and manage AI/data solutions using Azure Open AI, Azure Kubernetes Service … the following skills and experience: Strong communication and problem-solving skills. Proficiency in C#, .NET, or Python for AI-driven solutions and automation. Experience in AI solution integration and API development (REST, GraphQL). Hands-on experience with Azure cloud services, including Azure OpenAI, AKS, and Azure Container Apps. Strong knowledge of SQL and NoSQL databases (Azure Cosmos More ❯

the wider community Contribute to ensuring all IT change is appropriately governed and aligns to application roadmaps and the overall IT Strategy, Standards and Practices Engage actively in business development activities to maintain a holistic view of the portfolio of change, in order to stay current with most effective solutions to address them Experience we need from you: A … global IT and business related teams, with a solid technology background, experience in capability and data models, domain driven design for application strategy, across all phases of the software development lifecycle. Additional responsibilities include ensuring IT Infrastructure and application design are secure, reliable, and regularly reviewed. This role will also develop and enhance relationship management with key service partners … They are now looking to recruit a Senior Solutions Architect to be based at the Company's Central London Offices. You will extensive and deep expertise in following Application Development areas: Expertise in application architecture using modern technologies such as cloud native development, 12 factor apps, microservices, serverless, API management, Kafka, etc. Deep knowledge of Microservices, Containers More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

They are now looking to recruit a Senior Solutions Architect to be based at the Company's Central London Offices. You will extensive and deep Expertise in following Application Development areas: " Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka, etc. " Deep knowledge of Microservices, Containers … REST APIs development, API Management tools (e.g. MuleSoft, Apigee), Kafka " Solution architect with broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc. " Application dev experience with at least one of the cloud providers - Amazon AWS or MS Azure " Understanding of distributed computing paradigm … and exposure to building highly scalable systems. " Experience with platform modernization and cloud migration projects " Expertise in Agile development methodologies like TDD, BDD, Performance/Load testing etc. " DevOps experience - CI/CD, Test Automation, Containerization - tools and processes " Should be conversant with emerging technologies - chatbots, voice/conversational interfaces, RPA, Machine Learning, etc. " In-depth, hands-on experience More ❯

our colleagues and clients. KEY RESPONSIBILITIES Design and develop new systems integrations Support and improve existing integrations Provide documentation and training as required Maintain a change management log for development work Liaise with external resource as required Support project timelines & quality standards Investigate and resolve data/process errors PERSON SPECIFICATION This is a role focused upon integrations between … ERP, CRM, ESP and associated systems. You will work as an integral member of the business systems team, have previous knowledge of integrations and be open to exploring new development tools. Working closely with Business Systems and Digital Marketing you will be required to understand and translate requirements from various business areas into deliverable integration solutions. The following competencies … are expected: Zapier API creation & administration JSON API development Knowledge of API and Webhook methodologies Understand complex data structures & relational databases Knowledge of ERP/CRM (Priority/SAP/HubSpot/Dynamics/Salesforce) Data flow and process mapping Ability to understand new and changing systems used throughout the business and how to integrate them More ❯

our colleagues and clients. KEY RESPONSIBILITIES Design and develop new systems integrations Support and improve existing integrations Provide documentation and training as required Maintain a change management log for development work Liaise with external resource as required Support project timelines & quality standards Investigate and resolve data/process errors PERSON SPECIFICATION This is a role focused upon integrations between … ERP, CRM, ESP and associated systems. You will work as an integral member of the business systems team, have previous knowledge of integrations and be open to exploring new development tools. Working closely with Business Systems and Digital Marketing you will be required to understand and translate requirements from various business areas into deliverable integration solutions. The following competencies … are expected: Zapier API creation & administration JSON API development Knowledge of API and Webhook methodologies Understand complex data structures & relational databases Knowledge of ERP/CRM (Priority/SAP/HubSpot/Dynamics/Salesforce) Data flow and process mapping Ability to understand new and changing systems used throughout the business and how to integrate them More ❯

needs and aligning it to technology solutions Experience delivering solutions using an Agile/Scrum methodology Technical Requirements Expertise in application architecture using modern technologies such as cloud native development, 12 factor Apps, microservices, serverless, API management, Kafka Deep knowledge of Microservices, Containers, REST APIs development, API Management tools (e.g. MuleSoft, Apigee), Kafka Solution architect with … broad expertise in wide range of digital technologies in areas of application platform development, web and mobile development, cloud, integration, security, etc. Application dev experience with at least one of the cloud providers - Amazon AWS or MS Azure Understanding of distributed computing paradigm and exposure to building highly scalable systems Experience with platform modernization and cloud migration projects … Expertise in Agile development methodologies like TDD, BDD, Performance/Load testing etc. DevOps experience - CI/CD, Test Automation, Containerization - tools and processes Should be conversant with emerging technologies - chatbots, voice/conversational interfaces, RPA, Machine Learning, etc. In-depth, hands-on experience in developing web/mobile applications or platform with either Java/J2EE or .NET More ❯

We are looking for a Senior/Lead Front-end JavaScript Developer to join our consulting client. We have multiple locations available In this role, you will lead the development of an impactful web application for a public sector programme, ensuring high performance, scalability, and maintainability. You will work closely with cross-functional teams to deliver engaging solutions that … HTML, CSS & JavaScript Collaborate with architects and other developers to design robust, scalable, and secure architectures for new projects and enhancements to existing systems. Lead and participate in agile development processes, including sprint planning, daily stand-ups, and retrospectives. Conduct thorough code reviews to ensure code quality, performance, and adherence to best practices. Continuously improve our teams' development … the GOV.UK Design System Familiarity with the GOV.UK CASA UI framework Experience with MongoDB and NoSQL variants writing robust and scalable queries and operations Experience with TypeScript and modern development tools and practices. Knowledge of Cloud-Native development on the AWS Platform (IAM, SQS, S3, Secrets Management, KMS). Familiarity with CI/CD pipelines and DevOps practices. More ❯

is looking for a Developer to join the Enterprise Operations team on a fixed Term Contract until 30th June 2026. You will be working on a mix of new development projects and the legacy system support as part of the university's multiyear digital transformation program. We are expanding the Enterprise Operations team to meet increased demand and project … in areas such as cloud migration, as well as supporting, maintaining and implementing change to existing products and services. To do this you must have experience of full stack development and working with front end and back-end technologies. Applicants should be comfortable working with long lifecycle IT systems and older codebases, some of which may not be well … Waterfall framework. The team work collaboratively and enjoy having delegated ownership and responsibility for end-to-end task delivery The successful candidate will have the following skills & experience: · Backend Development: C# .NET Core, API development, SQL · Frontend Development: Angular or similar frameworks · Legacy Systems: ASP.NET Web Forms · Architecture & Integration: System design, integrations · Methodologies: Agile, Waterfall The More ❯

organisation in the manufacturing industry who are embarking on an exciting transformation project to develop a brand-new B2B solution that will replace our existing platform. While the core development will be outsourced, they're building a strong internal capability to support ongoing enhancements and ensure the solution evolves with our business needs. This is a fantastic opportunity to … be involved from the ground up and make a lasting impact. Your new role Collaborate closely with external development partners and internal stakeholders to ensure the new B2B solution is aligned with business requirements, scalable, and maintainable. Provide technical oversight during the development lifecycle and build in-house capabilities to support future enhancements, integrations, and continuous improvement initiatives. … What you'll need to succeed 1+ years in a similar role within a fast-paced warehousing or logistics environment. Web Development: Proficiency in HTML, CSS, JavaScript (React, Vue.js, or similar). Experience with Liquid templating (used in BigCommerce themes). Responsive design and accessibility standards. API Development & Integration: RESTful API design and consumption. Experience with More ❯

organisation in the manufacturing industry who are embarking on an exciting transformation project to develop a brand-new B2B solution that will replace our existing platform. While the core development will be outsourced, they're building a strong internal capability to support ongoing enhancements and ensure the solution evolves with our business needs. This is a fantastic opportunity to … be involved from the ground up and make a lasting impact. Your new role Collaborate closely with external development partners and internal stakeholders to ensure the new B2B solution is aligned with business requirements, scalable, and maintainable. Provide technical oversight during the development lifecycle and build in-house capabilities to support future enhancements, integrations, and continuous improvement initiatives. … What you'll need to succeed 1+ years in a similar role within a fast-paced warehousing or logistics environment. Web Development: Proficiency in HTML, CSS, JavaScript (React, Vue.js, or similar). Experience with Liquid templating (used in BigCommerce themes). Responsive design and accessibility standards. API Development & Integration: RESTful API design and consumption. Experience with More ❯

opportunity for a talented Full-Stack Developer or AI Software Engineer with strong experience in Node.js, PHP, and Python to take ownership of innovative projects that blend AI, web development, and scalable cloud systems . This role is ideal for a developer who enjoys working across the stack from building APIs and scalable back-end systems to creating user … Kubernetes, and AWS/GCP/Azure Taking the technical lead reviewing code, mentoring others, and ensuring software quality What were looking for: Strong experience with Node.js and backend development Proven background in PHP (for backend services and integrations) Knowledge of Python for AI/ML integration and data processing Experience in Full-Stack Development including front-end … AI technology, innovation, and problem-solving Whats on offer: Salary £55,000 £70,000 DOE A key role in a growing, innovative digital team Exposure to cutting-edge AI development projects Opportunity to shape architecture and lead development strategy Career progression within a forward-thinking company This is an outstanding opportunity for a Full-Stack Developer/Node.js More ❯

world-class cloud solutions used by clients around the globe. As part of their continued growth, theyre looking for a Fullstack TypeScript Developer to join their cross-functional, agile development team. The Role As a Fullstack Developer, youll play a key role in designing and building intuitive, data-rich, and user-friendly applications. Youll work across the full stack … with a particular focus on Node.js backend development , while also creating high-quality front-end interfaces in React . Core Responsibilities for this Developer role: Develop, maintain, and enhance cloud-based applications and services . Focus on Node.js backend development and RESTful API design. Collaborate with designers, product owners, and fellow developers in an agile environment . … Build and optimise front-end features using React. Apply Test-Driven Development (TDD) principles to deliver reliable, maintainable code. Use Git for version control and Azure DevOps for tracking progress and estimations. Core Skills & Experience 5+ years experience developing commercial software and web applications . Strong proficiency in TypeScript for building data-heavy applications. Skilled in Node.js backend and More ❯

goals. ? Ensure product & service quality following internal and external standards. ?? Improve software processes & tooling for efficiency. ?? Ensure technical standards, documentation & processes are consistently applied. ?? Assist in refining requirements into development backlogs and demo working software in iteration reviews. ?? Support and sustain CI/CD pipelines using tools like Bitbucket, Jenkins, and Artifactory. ?? Write and lead software designs , presenting clear … solutions and guiding developers. ?? Review code & resolve issues across the project lifecycle. ?? Support technical sales & effort estimation for new initiatives. ? Essential Experience ?? 5+ years C#/.NET development (including Android). ?? 5+ years REST/RESTful API development . ?? Strong OOP, UML, Design Patterns, SOLID principles. ?? 5+ years in Agile (Scrum, Kanban, agile mindset) . ?? Hands-on … experience with SonarQube & addressing security vulnerabilities. ?? CI & automated testing (TDD/BDD). ?? Unit testing & coverage tools (e.g., NUnit, SonarQube, AltCover). ? Desired Experience ?? Embedded software development knowledge. ?? Android development (Xamarin is a plus). ??? Windows CE/Embedded & .NET Compact Framework. ?? C/C++ on Linux (embedded). ?? JavaScript technologies. ??? Database technologies. ?? JIRA for workflow management. ??? Source More ❯